KMT High Precision Grinding English 2012 - KMT Precision ...

High Precision
Ranges up to 4 000 mm
Combination grinder replaces four machines
New control panel extends service life
World leader in
high precision grinding
by KMT

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www.dittel.com

Dear reader,
Here at KMT Precision Grinding, we are very proud of our long
history and the leading position in which we now find
ourselves. We have achieved this position thanks to our
committed, knowledgeable staff and our strong customer
base. We do not just sell grinding machines. We strive to
provide our customers total support from installation and
continuous aftermarket service, through the life of our
products with updates and renovations. This magazine
provides a few examples of our aftermarket and service
products. You can also find out how important precision is for
fuel injection components and what Hans-Erik Ångström,
internal combustion engine technology researcher, thinks
about the future.
KMT Precision Grinding is a company that is growing in
many ways, and we are constantly improving the service we
give to our customers. We are
increasing our workforce in
China in order to handle the
rapidly growing market in the
East. We are also focusing on the
American market, where we will
be taking part in the major IMTS
trade fair in the autumn.
Pleasant reading!
Thomas Karlsson,
President & CEO
www.kmtgrinding.com
KMT LIDKÖPING Tel: 0510-88 000, e-mail: infolidkoping@kmtgroup.com
KMT UVA Tel: 08-634 75 00, e-mail: infouva@kmtgroup.com
KMT USA Tel: +1 508 634 4301, e-mail: infoboston@kmtgroup.com
KMT China Tel: +86 10 652 20 515, e-mail: infouva_asia@kmtgroup.com
KMT Germany Tel: +49 7152 35 9390, e-mail: infouva_germany@kmtgroup.com
KMT India Tel: +91 981 082 4106, e-mail: infoindia@kmtgroup.com
Publisher: Ann-Christin Sandin Almén Project manager: Daniel Svensson Editor: Henrik Ekberg,
Håkan Hellström Photos: Stefan Svensson, Simon Johansson, Jennifer Nemie, Anders Nilsson, KMT
Layout: Örjan Folcke Ads: Malin Svensson Mediasales: Maud Svensson, Maria Sveed Production:
Roxx Communication Group, www.roxx.se Printing: Strokirk-Landströms, 2012
www.kmtgrinding.com High Precision Grinding | 3

4 | High Precision Grinding

Worldwide leader in the
field of precision grinding
KMT Precision Grinding has, today, subsidiaries all over the world. The
branches in Boston, Leonberg, Lidköping, Bromma, Gurgaon and Beijing
cover all time zones and provide a 24 hours support.
KMT’s subsidiaries in the US, China and Germany are
working with sales and aftermarket. The production sites
for new machines, rebuilds and repair work are located in
Sweden; rebuilds are also performed in Gurgaon, India.
KMT Precision Grinding, today’s world leader in the field
of precision grinding, is one of the oldest machine manufacturers
in Sweden. The company is a merger of UVA
International AB and KMT Lidköping, which were founded
in 1928 and 1875 respectively as Nomy AB as well as
Lidköpings Mekaniska Verkstad AB.
Lidköping started off with the production of exterior
lighting, park benches, ploughs and other agricultural
products. The engine construction started in 1902 and in
1908, we became one of the first suppliers to SKF, which
was established in 1907. UVA began production of
hydrodynamic bearings as well as gearboxes for, among
other things, railways. n
Some important dates
in KMT’s history:
1875 Lidköpings Mekaniska Verkstad (LMV) was founded
1928 Nomy, which became later UVA, was founded
in Stockholm
1929 LMV is incorporated in SKF
1979 LMV starts cooperation with partners in the US
1982 KMT Precision Grinding GmbH (today’s name) starts business
in Germany
1986 Lidköpings Mekaniska Verkstad AB (LMV) changes its name to
Lidköping Machine Tools AB (LMT)
1996 UVA is incorporated in Karolin Machine Tools (KMT)
2000 SKF sells LMT to KMT
2000 KMT opens office in China
2006 LMT changes its name to KMT Lidköping
2006 KMT Production Machinery India starts business Gurgaon, India
2007 UVA and KMT Lidköping merge and the company changes its
name to KMT Precision Grinding AB
2008 Nordstjernan takes over all shares of KMT
2008 KMT Beijing starts business in China
2009 KMT Precision Grinding Inc starts business in Boston, USA
2012 KMT has today approx. 180 employees around the world.
www.kmtgrinding.com High Precision Grinding | 5

Combination grinding machine
that replaces four single machines
A combination grinding machine from KMT can replace up to four machines on bearing
ring production lines. As well as saving on space, the ring never leaves the machine. All
operations are performed in one handling.
“This means that you can easily increase the production rate if you need to. We are world
leaders when it comes to these combination grinding machines,” says Jan Pettersson at
KMT in Lidköping.
The LIDKÖPING
SUUC 600
grinding machine
is used to
manufacture
bearings with
an inner
diameter of at
least 80 millimetres.
6 | High Precision Grinding www.kmtgrinding.com

KMT Precision Grinding has supplied the
market with combination grinding machines
via the two brands, LIDKÖPING and UVA, for
more than 20 years. There are many advantages
to being able to rough and finish grind both
internally and externally in a single operation.
All using one and the same machine
Instead of using four different single-use
machines for the various work elements,
everything is done by one and the same
machine. At the same time, you do not have to
load and unload the rings the way you have to
for single machines. Single machines require
more space and staff to run them, too. When
a ring is ground in a machine that only
executes one operation, there is also a risk of
the piece warping and becoming oval.
“The stresses in the ring after hardening,
among other things, are gradually released
when you grind internally and externally at
the same time. This means that we can grind
round rings that do not warp by clamping
them just once,” explains Jan Pettersson.
For the automotive, paper
and wind power industries
The rings manufactured in these machines are
normally for larger bearings, such as the ones
used in the automotive and paper industries
and in wind turbines. The LIDKÖPING SUUC
240 is used to manufacture bearings with an
inner diameter of at least 80 millimetres.
The biggest machine, the LIDKÖPING SUUC
800, is able to handle bearings with an
external diameter of up to 820 millimetres.
Tony Gustavsen, machine engineer, and Jan Pettersson, process engineer, at KMT in Lidköping.
The work side can be rotated by 90° for easy changing of the workpiece.
The rings are fed vertically into the machine
using a robot, thereby keeping the loading
time short. The total cycle time for the
smallest rings is just 40 seconds, and 15
minutes for the biggest.
“It is also easier to maintain high quality as
you are using the same tools in a combination
machine. Maintaining the tolerances in one
and the same batch is also simpler,” reckons
Tony Gustavsen, machine engineer at KMT in
Lidköping.
Customised to suit customer requirements
The company in Bromma manufactures UVAie,
which performs both internal and external
grinding of smaller products, simultaneously or
in sequence. This machine, which is part of the
UVA Nomyline series, is a modular product
which allows the machine to be fully customised
to suit customers’ requirements. n
www.kmtgrinding.com High Precision Grinding | 7

Robot based automation solutions
for the manufacturing industry
From single robot installations to
complete production systems
Artech Automation AB Laxå - Sweden
www.artechautomation.se Tel. +46 (0)584 44 44 80
Turn-key deliveries with full responsibility
from idea to production start
More than 800 robot applications
on the market since 1995
a company within the Artech Group”
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We have a long tradition as a proud supplier of dressing
We have a long tradition as a proud supplier of dressing
and grinding systems to KMT Precision Grinding.
and grinding systems to KMT Precision Grinding.
If you need a special drive, we will have an adequate
If you need a special drive, we will have an adequate
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IMTS, International Manufacturing Technology Show, is the US largest manufacturing exhibition and gathers more than 85,000 visitors.
Focus on technology and productivity at
the US largest manufacturing exhibition
A superior service offer is what makes KMT stand out on the very competitive US
market.
“KMT has found that a proactive approach to keeping machines well maintained leads
to better productivity,” says Brad Klar, President of KMT Precision Grinding Inc. USA.
“We also realize that costs associated with downtime are far greater when it is not
predicted. In preparation, KMT matches service programs with customer challenges.”
“We have a strong
focus on service, and
our service engineers
play an important
part in helping our
customers to make
money with their KMT
brand machines”, says
Brad Klar.
KMT Precision Grinding, Inc. is located
outside of Boston, Massachusetts. The
company consists of nine full time team
members, including sales specialists for
UVA, Lidköping, and Aftermarket Parts
and Service. Three of the employees
work at the Boston facility.
”We also have service engineers
strategically placed across the country
to be as close to the market and our
customers as possible,” says Brad Klar.
“While this only addresses part of all
the demand, the company also relies
on a network of first class independent
service specialists, all of whom have
had training and/or prior knowledge of
KMT brand machines.”
KMT machines are found in many
different manufacturing industries in
the US, but the two largest segments
are ball bearings and fuel injection.
A full service program
The US subsidiary provides a full
service programme to its customers,
including sales, installation, and service
of new Lidköping and UVA internal
and external grinding machines.
“We have a strong focus on service,
and our service engineers play an
important part in helping our customers
to make money with their KMT brand
machines”, says Brad Klar. “The service
engineers are often assigned to specific
plants so that they in turn become part
of our customers’ production team. In
doing so, our service engineers can
recommend common sense solutions
to optimize machine performance and
assure uptime.”
With programs such as these in
place, plant management can schedule
downtime for maintenance on their
own terms, and avoid the costs and
headaches of unplanned interruptions.
“There are KMT machines in the US
that have been in operation for 50
years, so there is definitely a strong
tradition to take very good care of
your equipment here,” says Brad Klar.
KMT offers machine upgrading,
rebuilding and refurbishing, thus
extending the life span of older
machines.
“Upgrades improve reliability and
productivity of the machines,” says
Brad Klar. “Another way to meet
changes in demand is retooling and
re-engineering.”
The service offer also includes repair
service, preventive maintenance
programs specifically tailored for
Dick Seiss is Service Manager at KMT Precision
Grinding Inc.
customer operations, and field service
support for mechanical, electrical, and
applications for all brands.
KMT at IMTS
KMT will be present at the IMTS
exhibition in Chicago on September
10–15. IMTS, International Manufacturing
Technology Show, is the US
largest manufacturing exhibition and
gathers more than 42,000 visitors.
“The IMTS is a great opportunity to
meet both existing and presumptive
customers,” says Brad Klar. “KMT will
focus on the technology as well as the
productivity of our machines. Welcome
to visit us in our booth N-6970!” n
www.kmtgrinding.com High Precision Grinding | 9

Photo: Anders Nilsson
WIND POWER IN THE WORLD
Wind power started to be expanded in the
early 1980s. In Germany, wind power accounts
for around 6 percent of the country’s electricity
production, and no less than 20 percent in
Denmark. Denmark was also where the
expansion of commercial wind power began.
Wind power is one of Denmark’s biggest
export industries nowadays. India, Spain,
China, the USA and Canada are other major
wind power countries.
10 | High Precision Grinding www.kmtgrinding.com

KMT’s contribution to a more
sustainable society is spelled V-T-G,
and its importance in the manufacture
of wind turbines cannot be
underestimated.
“Our biggest model, the VTG 4000,
can machine wind turbine components
more than four metres in size.
These bearings require a kind of hard
turning and grinding – which is
extremely demanding – in order to
produce the best possible end
product,” says Eive Johansson, chief
designer at KMT Precision Grinding
in Lidköping.
New technology and long tradition
meet in VTG machines
There is no doubt that wind turbines
will have an important role to play in
the future. And as the need constantly
grows, the wind turbines surrounding
us become bigger and bigger. At the
same time, demands for wind turbine
technology to be as efficient as
possible are becoming more stringent.
In this regard, the bearings in these
devices have a significant part to play
in reducing friction and permitting
stable rotation.
With all its experience of grinding
bearings, KMT was the first grinding
company in the world to invest in
machines that both grind and turn
components for industries that require
larger diameters, such as wind turbines,
offshore, and paper. The result: VTG
1 500 and VTG 4 000. The former
handles bearings with an external
diameter of between 500 and 1500
millimetres for the aircraft-, marine-,
offshore- and paper industries, while
the larger machine handles bearings of
between 1300 and 4000 millimetres
for the wind turbine industry.
Extremely large precision bearings
“The major advantage of these machines
is that they allow us to manufacture
extremely large precision bearings. We
have the same resolution for positioning
in these large machines as we have
in our smallest ones. The linear motors
are the same, it is just that they are
longer,” says Per Junskog, comparing
with a classic ball screw machine:
“The sliders are relatively slow and
lose precision as you increase in size,
but this is not the case with the linear
motors. We maintain the same high
precision even though we are
manufacturing bearings four metres
in diameter.”
The linear motors in the vertical
grindingmachines used for the
positioning of grinding wheels and
turning tools move incredibly fast
when a tool is changed. This is
important to a machine that handles
both grinding and turning where a
number of elements are included in
production. This speed, combined with
a carousel in a hydrostatic bearing and
hydrostatic sliders, resultsin minimal
friction, and makes KMT’s machines
unique.
“The latest technology in the form
of linear motors and our long tradition
of hydrostatics means that the linear
and rotary movements are more
accurate. Hence it is possible to
achieve an optimum profile on the
surface,” explains Eive Johansson.
Stringent demands on every part
There are bearings in several locations
in a wind turbine. For instance, they
can be found in the support for the
rotor blades, in the turbine shaft and
in the transmission. The more efficient
the beaings, ,the more easily the turbine
rotates and therefore less energy is
lost. The rotating rotor blades drive
the turbine shaft, and the bearings for
the turbine shaft can be up to four
metres in diameter. These bearings are
subject to major stresses. Stringent
demands are also made of certain
smaller bearings, even though these
are not subject to any major rigours.
“For example, the bearings located
at the blades are locked in a certain
position and therefore does not require
any high precision. But enormously
stringent demands are made of every
part in the device as the insurance
sums involved are huge,” says Per
Junskog.
The wind power industry has been
in a depression for a couple of years,
but Per Junskog believes that this is
changing because requests for KMT’s
vertical grinding machines are now
more common.
“This means that people’s interest is
on its way back. And we believe that
their quality demands will be more
crucial and that manufacturers of wind
turbines will also choose to invest in
quality products and bearings in their
devices. They stand to gain from doing
so in the long run.” n
Per Junskog, machine
salesman, and Eive
Johansson, chief
designer, at KMT
Precision Grinding in
Lidköping.
www.kmtgrinding.com High Precision Grinding | 11

High Precision Grinding
liDKÖPiNG
VtG1500/4000
Machine type Workholding Principle Work Piece Dimension
iD oD
VtG1500
VtG4000
internal /
external /
Hard
turning
Magnetic
chucking
UVA
NoMyliNe iNterNAl/
FAce/exterNAl
Inner Ring SRB
Windmill, radar Station
Hard turning/grinding
external or internal
Inner Ring
Gearbox,
large crane
Hard turning/
grinding
external or
internal
min Ø 440
max Ø 1 450
min Ø 1 000
max Ø 3 800
Slewing
Bearing
Windmill
Hard turning/
grinding
Valve Lifter Pump Head
Nozzle Grinding Pump Body
min Ø 500
max Ø 1 500
min Ø 1 300
max Ø 4 000
Machine type Workholding Principle Work Piece Dimension
UVAi internal chucking
oD Width
ø 0,5-100 max 200
UVAitwin internal chucking ø 0,5-36 max 120
UVAe external
UVAie
external/
internal
Chucking/
between centers
Download catalouge
on your mobile device
Download catalouge
on your mobile device
ø 1,0-80 max 160
chucking ø 1,0-36 max 160
Uvaiindex internal chucking ø 0,5-36 max 80
liDKÖPiNG
DG300/400/500/700/800
Machine Grinding Wheel Principle Work Piece Dimension
DG300 300 mm
iD
ø 5-160
oD
max 80
DG400 500 mm ø 15-240 max 120
DG500 500 mm ø 20-250 max 80
DG700 700 mm ø 190-610 max 250
DG800 800 mm ø 300-820 max 250
liDKÖPiNG
SUU240/320/600
Download catalouge
on your mobile device
Inner Ring DGBB
Bearing - Face
Outer Ring DGBB
Bearing - Face
Download catalouge
on your mobile device
Gear Part
Automotive -
internal
Outer Ring Flange
Bearing - internal
Inner RIng DGBB
Bearing - Face
Joints
Bearing - Face
Machine type Workholding Principle Work Piece Dimension
oD Width
SUU240
ø 20-240 max 120
internal/ Shoe
SUU320
external/
Flange
centerless/
centric
ø 100- 320 max 140
(rib Face) chucking
SUU600 ø 150-600 max 200
Inner Ring Spindle
Bearing - external
Inner Ring Truck HUB
Bearing - external or
internal or rib Face
12 | High Precision Grinding www.kmtgrinding.com

Machines
liDKÖPiNG
cl630/660
Machine Principle
liDKÖPiNG
SSB 110/200
Camshaft
Automotive -
external
Download catalouge
on your mobile device
Work Piece
oD
Outer Ring
Bearing -
external
Wheel Width
Inner Ring DGBB
Bearing - internal
Inner Ring DGBB
Bearing - internal
Wheel Ø
(WorN)
cl630 ≤125 300 (400) 610/630 (380)
cl660 ≤250 610 (700) 610/630 (380)
Download catalouge
on your mobile device
Joints
Automotive -
external
Machine type Workholding Principle Work Piece Dimension
oD width
SSB110
Ø 19-150 max 65
internal
Shoe
centerless
SSB200 Ø 20-160 max 100
Outer Ring HUB
Bearing - internal
liDKÖPiNG
SUUc240/600/800
Machine type Workholding Principle Work Piece Dimension
SUUc240
SUUc600
SUUc800
external/
internal/
Flange
(rib Face)
liDKÖPiNG
SGP62B
Shoe
centerless
liDKÖPiNG/UVA
NANo iD
Outer Ring Truck HUB
Bearing - external and internal
Outer Ring
Railway
Bearing - external
and internal
Outer Ring DGBB
Bearing - external
Inner Ring DGBB
Bearing - external
iD/oD Width
iD min ø 80
oD max ø 250
iD min ø 130
oD max ø 600
iD min ø 370
oD max ø 820
max 130
max 180
max 250
Inner Ring SRB
Bearing - external
and internal
Machine type Workholding Principle Work Piece Dimension
SGP628 external
Inner Ring DGBB
Bearing - external
Machine type Workholding Principle Work Piece Dimension
Nano internal
Shoe
centerless
Shoe centerless/centric
Download catalouge
on your mobile device
Download catalouge
on your mobile device
Download catalouge
on your mobile device
oD Width
ø 7-62 max 40
oD Width
min ø 8
max ø 72
www.kmtgrinding.com High Precision Grinding | 13
max 52

”What is driving
development is the
competition between
manufacturers, the
new emissions requirements
being specified
and customers’ desire
and also authorities’
demands for reduced
emissions,” says Hans-
Erik Ångström.
14 | High Precision Grinding www.kmtgrinding.com
Photos: Simon Johansson

Researcher Hans-Erik Ångström on KMT:
“It is wonderful that Sweden
has a company that can do
such precision work”
As emission requirements become more stringent, more stringent demands
are also made of the parts that control fuel injection in diesel engines; that
is to say, products manufactured by KMT’s Nomyline machines.
“It is wonderful that Sweden has a company that can do such precision
work,” says Hans-Erik Ångström, Professor of Internal Combustion Engine
Technology at the Royal Institute of Technology in Stockholm.
Machines which grind parts with
tolerances measured in thousandths
of a millimetre are manufactured at
the KMT plant in Bromma.
The amount of fuel injected in a
diesel engine has to be exact in terms
of both quantity and structure. Injector
nozzles control this fuel volume, and
KMT’s UVA Nomyline machines are
used to manufacture them. The major
challenge faced by the automotive
industry nowadays involves reducing
fuel consumption in order to reduce
emissions of carbon dioxide, for
example.
“Nowadays, system pressures are
being increased in order to reduce
emissions. But at the same time, this
increases the demands on our
products, and we are working hard to
keep up with developments to be able
to offer our automotive customers the
things they demand,” says Urban
Myrefors, site manager at the KMT
plant in Bromma.
0.3 micrometres in diameter
Pressures can be increased without
sacrificing strength by reducing the
diameter of the holes in component
parts. This makes even more stringent
demands of the grinding machine in
that the holes are slimmer. The
increase in pressure also means that
the shape tolerances of all the sealing
surfaces are tighter so as to reduce
leakage. According to Urban Myrefors,
Hans-Erik Ångström, together with Royal Institute of Technology students Hans-Christian Vinners and Bengt Aronsson.
there is currently extreme expansion in
the field and new systems are turning
up all the time.
“It is becoming harder and harder
to grind these components. For instance,
we are down to around 0.3 micrometres
in diameter, but our machines can
handle this because of the technology
in our designs, including hydrostatics
and linear motors,” says Urban
Myrefors.
Enormous stresses
Researcher Hans-Erik Ångström at the
Royal Institute of Technology, who
Urban Myrefors, plant
manager at KMT
Bromma.
used to work for Cummins in the USA
and as head of design at Scania, says
that there are no signs to indicate that
work on increasing injection pressure
in diesel engines is diminishing.
“There are enormous stresses on the
systems. And the actual pump that
generates the pressure cannot be too
big. What is driving development is the
competition between manufacturers,
the new emissions requirements being
specified and customers’ desire and
also authorities’ demands for reduced
emissions.”
>>>
www.kmtgrinding.com High Precision Grinding | 15

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cDD Dressing tools –
focus on the detail
Dressing-spindle systems
Dressing-spindle systems

What manufacturers are currently
working towards is the new EU
legislation on emissions, Euro 6, which
will come into force as of 31 December
2013. Essentially, this involves reducing
particulate emissions by half, and
reducing emissions of nitrogen oxides
by 77 per cent in all new trucks.
Hans-Erik Ångström feels that
finding a fast fuel mix to meet these
emission requirements would be a very
significant step.
“We have to find the right mix of
fuel to air which really gets into the
combustion chamber and has time to
mix before being ignited. But it is hard
to find the right mixture that operates
broadly; with different fuel volumes,
speeds and air densities. I think this is
what attempts are being made to
achieve, but I cannot claim that a
solution is particularly close at hand.
A type of combustion like this can be
achieved at low partial load at present,
but this is not possible for truck engines
that operate at maximum output.”
Research into biofuel
Hans-Erik Ångström and his colleagues
“We have to find the right mix of fuel to air which really gets into the combustion chamber and has time to mix before being ignited,”
says Hans-Erik Ångström.
at the Royal Institute of Technology are
currently working to see how biofuel
affects injection systems. But it is too
early as yet to say anything about that
research.
Ångström has worked together with
KMT previously on a project relating to
Hans-Erik Ångström and his colleagues at the Royal Institute of Technology are working to see how biofuel affects injection systems.
At GMN, clocks aren’t ticking faster than elsewhere in the world.
Considering the fact however, that we develop high frequency spindles reaching
highest rpm per second, it might be assumed that our seconds last longer than usual.
By now, we are developing materials and technologies that enable even higher
frequencies. And maybe one day, we can even steer the rotating speed of the sweep hand.
GMN Paul Müller Industrie GmbH & Co. KG
Äußere Bayreuther Str. 230 · D-90411 Nürnberg
a rotary injector. For this, KMT helped
to produce components for the research.
“It is fantastic that we have a
company in Sweden that can do such
precision work.
These are advanced components,
and KMT is a prominent player.” n
Phone: +49 911-5691-0
vertrieb.spi@gmn.de
UVA’s BAsIC MACHINEs
UVA in Bromma - part of KMT since 1996 – has
been manufacturing grinding machines for internal
combustion engine parts since 1965. Its production
line is made up of the tried and tested basic
machines:
• UVAi – for internal grinding
• UVAe – for external grinding
• UVAie – for both external and internal grinding
• UVAi Twin – offers two parallel grinding
processes
• UVA MC – simultaneous grinding from two
directions
These machines are modular and customised to
suit customers’ specific requirements concerning
the input and outfeed of parts, for example. The
machines can be configured for up to five internal
grinding operations or any combination of internal
grinding and flat grinding
www.kmtgrinding.com High Precision Grinding | 17
.de

The grinding machine
that never falls silent
The only thing that can really silence a centreless
machine is its electronics. But we have found an
effective solution to this at KMT Precision Grinding.
“We replace the control systems on site at customers’
premises. It takes no more than two weeks,” says Otto
Jernström, head of sales at KMT Precision Grinding.
“We have customers
who have handed
in machines that
have been operating
extensively for 30
years. Following a well
defined inspection and
subsequent servicing,
these machines are
like new,” explains
Otto Jernström.
The quality features of Lidköping
centreless machines are renowned. That
is why there is such enormous demand
for both old and new centreless
machines. The actual basic structure,
like all other KMT machines, is based
on hydrostatics in order to reduce
friction and eliminate wear in the most
susceptible locations. As a result,
hydrostatic slides, ball screws, and
grinding spindles retain the same good
qualities from year to year.
“We have customers who have
handed in machines that have been
operating extensively for 30 years.
Following a well defined inspection
and subsequent servicing, these
machines are like new,” explains Otto
Jernström.
Replacing customers’ control
systems
One problem that may be encountered
with centreless machines that have
been operating for maybe 20 or 30
years is that it is difficult to find spare
parts for the electronics, particularly
for the control systems. Quite simply,
this is because some parts are not made
any more. At KMT, this problem has
been resolved by offering customers
new control systems. The exchange
takes place at the customer’s premises
and does not take more than a couple
of weeks.
“The customer does not have to
send off the machine for a number of
months; the stoppage can be planned
well in advance. They have the
opportunity to run up production and
be ready when we arrive,” says Otto
Jernström.
High precision
First, all electronics are stripped from
the machine. Then we install a
completely new electrical cabinet, a
new control panel, new servo motors
and any other equipment required.
When everything has been installed
and all the cables have been placed,
the engineers at KMT test the function
of the updated centreless machine and
then restart it so that it can continue
production for many years to come.
Otto Jernström points out that KMT
still carries out complete renovations of
centreless machines at its plant in
Lidköping.
Over the years, KMT Precision
Grinding has supplied more than 4 000
centreless machines, predominantly
high precision machines. Rods,
Rebuilt CL630,
manufactured in 1983.
hydraulic pistons, piston pins, shafts,
pipes and rings for bearings are subject
to continuous grinding, giving a
throughput rate of up to several
meters per minute. A centreless
machines can supply six internal
grinding machines with parts.
“Our product development is very
much involved with fine-tuning the
technology and the process, as well as
with the software (PLC/CNC). We are
making progress on improving our
products every year,” says Otto
Jernström.
First machine in 1922
The first machine for grinding using
the centreless principle was supplied
by Lidköpings Mekaniska Verkstad in
1922. Many customers nowadays use
this kind of machine to grind various
components for cars, such as camshafts,
racks for power steering, universal
joint crosses or piston pins.
Of the 120 or so moving parts that
can be found in a four-cylinder engine,
more than half are normally ground
using the centreless principle. However,
these machines are also suitable for
grinding bearing rings and rollers for a
range of different bearing types, pistons
for hydraulic cylinders with extremely
stringent demands in terms of roundness
and diameter accuracy, strong steel
rods and shafts for electric motors. n
18 | High Precision Grinding www.kmtgrinding.com

KMT from a customer’s perspective
Antoine Hilaire works at the method
and development department at
Ascometal in France, and he answered
a number of questions we asked him
about KMT. Ascometal has more than
2 250 employees and manufactures
special steels for the automotive
industry, among others, with functions
for engines, injection, steering, transmission
and gearbox components.
Ascometal currently buys their shaft
grinding machines from KMT.
Are you happy with your grinding machines?
We certainly are. These machines are highly
productive and dimensioned correctly for our
production. They are incredibly robust, which
is evident from our products: high quality and
robust production. This means we have to do
very little maintenance. All mechanical and
KMT’s trademarks:
Everything in
Everything pneumaticsin
pneumatics
SMC Pneumatics Sweden AB
SMC Pneumatics Sweden AB
Ekhagsvägen 29–31, 141 71 HUDDINGE
Tel: 08-603 12 00 Fax: 08-603 12 90
E-post : post@smc.nu Ekhagsvägen Webbplats 29–31, 141 : 71 www.smc.nu
HUDDINGE
Tel: 08-603 12 00 Fax: 08-603 12 90
E-post : post@smc.nu Webbplats : www.smc.nu
n Linear Encoders
n Rotary Encoders
n Angle Encoders
n TNC Controls
n Touch Probes
electrical equipment is reliable and of very
good quality.
What types of product do you manufacture?
We produce small diameter metal shafts for
the automotive industry using a throughfeed
grinding process.
How would you describe your cooperation
with KMT?
KMT are receptive to our needs, and as part
of a joint project between Ascometal and
KMT we have produced the ultimate grinding
process for our products in terms of quality
and productivity.
What are the most important advantages
of KMT in its role as a supplier?
Experience, knowhow and the fact that KMT
know their grinding processes.
n Digital Readouts
n Length Gauges
www.heidenhain.de
What do you think of servicing and
aftermarket services at KMT?
KMT always have staff available to talk to us,
and they speak French. This is an advantage
for us. These are just a few reasons as to why
we think KMT provides a very good aftermarket
service. n
Serviceföretaget för induStri, handel och Sjöfart
Box 730, 531 17 LIDKÖPING, Besöksadress: Plastgatan 6 A, Tel. 0510-270 85,
Fax. 0510-293 65, www.vanermek.se, e-mail. info@vanermek.se
LANGED Industrial washers
and advanced lego production.
EFFICIENT
ECONOMICAL
ENVIRONMENT FRIENDLY
® Långeds Mekaniska AB
Tel. +46 (0)531 410 25 • Fax +46 (0)531 400 46
www.langed.com • info@langed.com
www.kmtgrinding.com High Precision Grinding | 19

Oliver Heidisch, service technician at KMT in Germany:
“We provide knowledge in how to improve
the productivity of the machines”
The service technicians are no doubt
the part of KMT that has the closest
relationship to the customer.
“In a way, it is our job that really
gives our company a competitive edge
over other machine manufacturers,”
says Oliver Heidisch, service technician
at KMT in Germany.
“We don’t just make the machines
work, we also provide knowledge in
how to improve the productivity of the
machines.”
Oliver Heidisch was employed by KMT in 2008.
Before that he worked at one of the largest
maintenance outsourcing companies in
Germany.
“I have trained for 3,5 years in industrial
mechanics,” says Oliver Heidisch. “The service
technicians at KMT have a very varied
background, but most of them have some
sort of higher technical education. Even
though they have different training, they are
all very experienced in maintenance and field
service support.”
Oliver developed his big interest in this
profession while in an industrial placement
during school. After the secondary school,
he decided to start his industrial training in
machine mechanics in a local company.
Close relationship
Oliver and the other technicians often visit the
same customers, and the service projects can
last for more than a year.
“It will certainly lead to a close contact
between the technician and the other work
crew, for instance at a production plant,” says
Oliver Heidisch. “We get a good insight in the
production reality of the customer, and a
good picture of the different situations than
can occur and affect the machines. We are a
great resource for the customer.”
Service technicians perform field service
support for mechanical, electrical and
applications, as well as machine rebuilding
and refurbishments, either on or off-site,
depending on the clients needs and wishes.
Common sense
The KMT grinding machines are high precision
tools, known for their longevity.
“And there is a lot that can be done to
extend the life of the machines, for instance
upgrade to new CNC controls, dressing
systems and sensors, or perform software
enhancements,” says Oliver Heidisch. “A lot
of the time, it is a matter of common sense,
like preventive maintenance. It is an easy step
to take, that will avoid the costs and inconvenience
of unplanned productions stops.”
“And there is a lot that can be done to extend the life of the
machines, for instance upgrade to new CNC controls, dressing
systems and sensors, or perform software enhancements,”
says Oliver Heidisch.
The customer always comes first for Oliver.
“In a way, we take a pride in our job to
provide service to our customers,” he says.
“Not just to meet their expectation, but also
to exceed them.” n
FACTs ABOUT OLIVER HEIDIsCH
Where he lives: In a small village in the
southern part of Thueringia in Germany
Age: 37
Family: not married, since 8 years a girlfriend,
17years old daughter
Education: 3,5 years, machine technician, after
that working in various companies as technician
for maintenance, rebuilding and repair
Hobbies: motorsport, sailing, cycling
20 | High Precision Grinding www.kmtgrinding.com

Control panel breathes new
life into older control systems
A new control panel in a Uvatronic 2
not only extends its service life. Its
communication is also considerably
more efficient.
“The new control panel has functions
to use a computer in the panel to connect
directly to the machine via Ethernet and
then we can solve the program changes,
etc. says Ronny Strandberg, software
developer at KMT in Bromma. “This saves
time and money for the customer.”
Although KMT Precision Grinding machines
are renowned for their long service life,
customers’ needs are constantly changing.
This is why KMT offers a range of different
upgrade packages to extend the service lives
of its grinding machines and increase their
productivity. One update that has improved
grinding results and reduced scrap for the
customer involves switching from a belt driven
chuck head to a directly driven one.
“This means that the motor drives the shaft
directly, leading to less disruption and better
results in the long run,” says Urban Myrefors,
plant manager at KMT’s plant in Bromma.
Faster Loading
He also mentions the introduction of a vacuum
gripping system produced in order to speed
siemens.com/sinumerik
up loading and unloading of work pieces. .
There are also various upgrade packages available
for updating older control systems and
offering optimisation of processes and the
software that controls the machine so as to
achieve shorter cycle times and better quality.
KMT is currently working on a new control
panel for machines fitted with the Uvatronic 2
control system. It looks much the same as the
control panel found on the latest control
system, Uvatronic 3.
“This control panel is being fitted with a
Windows PC, which this control system did
not have previously. Communication is routed
via Ethernet into a small PLC which converts
the format so that it is suitable for the
Uvatronic 2 control system. This means that
you can get a new panel to work on an older
machine,” explains Ronny Strandberg.
Easier to use
Instead of traditional buttons, the new panel
comes with pushbuttons on the screen; it is
also equipped with a detachable pendant
which allows the operator to work a short
distance away from the machine. But
according to Ronny Strandberg, the biggest
advantage is the built-in computer which
allows the customer to get help easily and
quickly if anything goes wrong.
Urban Myrefors, plant manager at the KMT plant in Bromma.
“Quite simply, the customer establishes a
connection with us so that we can perform
actions from the office instead of having to
travel out to the customer’s premises. This
saves a lot of time and money as there is less
travelling involved and no need to explain a
problem over the phone, a task which can
sometimes be quite difficult.” n
Increase productivity using SINUMERIK
The innovative CNC platform to meet all requirements
www.kmtgrinding.com High Precision Grinding | 21
90886_E20001-F600-P610_AZ_SINUMERIK_Solution_Dachmotiv_186x65.indd 1 21.06.12 13:49

SlipNaxos shows 100 years of company history with 185
employees and a turnover of 320 MSEK in 2010.
Our activity consists in development, production and sales
of grinding wheels to worldwide industries.
The company is part of the Swiss group Winterthur Technology
Group, which is owned by 3M with more than 7500
employees within Research and Development and a total of
approx. 80.000 employees.
The largest part of our production consists of custom-made
grinding wheels, which have been developed to serve a
specific grinding operation or machine. The company’s large
resources and flexibility enables us to provide our customers
with the best possible service and the lowest possible
total costs.
Together we
make industry
more efficient
As cooperation partner
of KMT, TOOLS supplies
overall solutions for
products and services for
process, maintenance,
repair and operations
– we call that MRO
www.tools.se
22 | High Precision Grinding www.kmtgrinding.com

Aftermarket service for KMT Trademarks
LIDKÖPING and UVA
KMT Precision Grinding offers a large number of products and services, which
provides the customer with a maximum use of his investments. Training,
upgrades and optimization present one part of the services provided.
1. FIELD SERVICE
• Emergency support
• Production support
• Preventive maintenance
• Inspection and analysis
2. SPARE PARTS
Original parts for UVA and LIDKÖPING
3. TOOLING
• New design
• Tool spares
4. REPAIRS
• Spindles, slides, circuit boards etc
5. UPGRADES
LIDKÖPING
• UPS Power Backup Solution
• Ballscrew & Harmonic Drive (Centerless)
• Control System
• Acoustic Emission
UVA
• Upgrade to CMP-70
• Vacuum Loading
• Cycle Time Reduction
• Direct Driven Workhead
• Servo Optimization
• New control panel UVATRONIC
6. REBUILDS
• Complete rebuild of old
generation grinding machines
7. TRAINING
• Grinding
• Mechanics
• Electrical and electronic
• Maintenance and preventive maintenance
8. SERVICE HOTLINE
SERVICE HOTLINE UVA
GMT 06.00–16.00
Phone: +46-8-634 75 33
Fax: +46 8-634 75 75
E-mail: infouva@kmtgroup.com
SERVICE HOTLINE USA
GMT 13.00–22.00
Office: +1 508 634 43 01
Cell: +1 617 335 4800
E-mail: serviceboston@kmtgroup.com
SERVICE HOTLINE ASIA
GMT 00.00–08.00
Phone: +86-1065 2205 15
Fax: +86-1065 22 06 63
E-mail: infouva_asia@kmtgroup.com
SERVICE HOTLINE LIDKÖPING
GMT 06.00–16:00
Phone: +46 510 88 112
Fax: +46 510 880 42
E-mail: servicelidkoping@kmtgroup.com
www.kmtgrinding.com High Precision Grinding | 23

CNC CONTROLS DRIVE SYSTEMS LASER SYSTEMS SERVICE
Ett väl beprövat CNC.
Nu på en ny nivå!
NYTT: gemensam fi berbuss
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