built; by ACCURPRESS - Sterling Machinery

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st;rengt;h. silence. safet;y & slmplicit:y
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built; by ACCURPRESS

A
E
Accurpress with plants located in Richmond,
British Columbia and Willmar, Minnesota, has fast
become one of North America's most progressive
press brake and shear manufacturers.
To meet the demands of a rapidly changing world,
Accurpress has spent hours of careful study and
engineering to perfect the press brake as it is
today.
Features that distinguish the unique Accurpress
brake among others are Ultimate durability,
Rigidity, Simplicity, and Affordability.
High accuracies are maintained by the most up
to date hydraulic. electrical and bearing systems.
Accurpress manufactures a range of press brakes
from 50 to 3000 tons and all units are covered by
an excellent parts and labour warranty, to be free
of defects in material and workmanship, under
correct use and normal operating conditions.
T

EBB
Pictured below is a typical
example of a heavy duty giant
size precision press brake. This
press contains no bronze
bushings. All bearings are
space age zero maintenance
type running on heat treated
hard chrome shafts.
The advanced design of this
press, and rigid metallurgical
control together with careful
construction, guarantee
lifetime durability and precision
accuracy.
1250 TON 25'

FRAME
The Accurpress brake is known for its heavy duty frame
construction. The entire machine is welded from A36
Structural Steel Plate to give ultimate rigidity and
durability.
BED DESIGN
The Accurpress features an I-beam bed design. This
design offers two attractive features - the least bed
deflection possible without going below floor level and a
wide working area for supporting punching dies and
special tooling.
For our larger press brakes. under-the-floor beds are
bolted to the brake at floor level. still enabling the main
frame to be fUlly welded.
RAM LEVEL
The parallel accuracy of the ram is guaranteed by the use
of the large torque tube welded at each end to the double
rocker arms. thus synchronizing the hydraulic cylinders.
Ram parallelism is easily adjusted by rotating an eccentric
shaft on the left end of the machine via a wrench or on the
larger press brakes by an electric motor. Ram parallel
adjustment is necessary for trimming the ram to various
die characteristics and for fade out work.
FOOT SWITCH WITH PEDESTAL
This feature is standard ONLY on models of 250 tons
capacity or larger. Easily moved from place to place. and
wired with an on-off jog switch. it saves set-up time as the
operator can control all ram movement from where he
stands.

ELECTRICS
All highest quality electrical components are used
and mounted within an all steel hinged door
enclosure c/w a disconnect for operator safety.
This switch shuts off power before the door can
be opened. All controls are at 115 volts and not at
line voltage, via a transformer within the cabinet
together with motor starter.
Three micro switches function to control ram
position and speeds. Two are mounted on the
cabinet providing the up stop and speed change
over. The third micro switch is remotely mounted
for ultimate accuracy and provides the depth bend
point. Typical repeat accuracy of the ram is t..OO1".
CONTROL SYSTEM
Accurpress originated the safety sequence
footswitch system as follows: A 3 position
Linemaster safety footswitch controls ram
movement. This enables the operator to stop ram
travel at any time up or down. and have full
control of ram action. The release of the foot
pedal automatically returns the ram to the up
position. The depth of the bend angle is adjusted
via the engraved Dial-a-bend control above the
electrical cabinet. This incremented dial equals
.010" per increment and its repeat accuracy
enables the logging of information for repeat
bends at a later date. This in conjunction with a
micrometer barrel enables .001" adjustments. Also
standard on every Accurpress is a manual 4­
position turrel depth gauge. allowing 4 various
pre-set bend angles. A red light on the cabinet
indicates when the micro switch has been
activated for the ease of setting bend angles. The
ram can be cycled from full length strokes down
to 1/8" strokes anywhere within the stroke range.
Both stroke length and speeds are quickly
adjusted via aluminium sliding cams.
AUTOMATIC SIX POSITION DEPTH STOP
(OPTIONAL)
This is an advanced Mitsubishi control unit to give
an operator up to six depth positions. Just one
position can be programmed in or up to six
positions depending on the job requirement.
The set up is very simple. The microswitch
selector switches must be in the "off" position
except the position which is being set up. This
particular switch is turned to the "on" position and
the ram is jogged down to the desired bend angle.
The sliding rod is then adjusted down to the limit
switch until the red light appears to indicate the
switch has been activated and the bend angle set.
These same steps are required until all desired
positions have been programmed.
AUTOCYCLING
Extra electrical relays in the control cabinet
provide an autocycling control feature. Rotating
the selector switch over from "manual" to "auto"
causes the ram to cycle up and down between the
adjustable limit positions provided the foot switch
pedal is depressed. On releasing the pedal the ram
will return to the fully up position and stop until
the pedal is depressed again.

BACK GAUGE
The standard back gauge is a heavy duty. rigid design
constructed of precision steel components. The back
gauge is adjusted both vertically and horizontally from
rear of press brake via hand wheels. Horizontal travel Is
0-27 inches. The back gauge also Includes a cross bar
with adjustment fingers.
PAINT AND FINISH
At Accurpress we take extreme care in the finish quality
of all our machines. All welds and plate surfaces are filled.
sanded, and three coats or more of safety green applied.
leaving the press beautifully finished. Before shipment all
machine surfaces are rust proofed insuring top quality
from our plant to your plant.
BEARINGS
All bearings used by Accurpress are extremely high
quality. running on heat treated. hardened chrome shafts.
These spherical self-aligning bearings never require
lubrication. They are built to last the lifetime of the press
brake with zero clearance.
THE WAYS BOX
The ram is guided by pre-loaded low friclion silicone poly.
providing zero maintenance precision ram guidance. This
material is contained in wrap around long length ways
boxes running on large precision ground bars for lifetime
trouble free service.
HYDRAULICS
Both Simplicity and Dependability are the two main
ingredients that compose the hydraulic unit.
All standard North American components are used by
Accurpress and the circuit is of such a progressive design
that only two valves are used for total control of the
system. One valve for each side of the low noise level
double vane pump provides the two down speeds for ram
and the high return speed.
The unit itself is mounted behind the bed in a safe,
accessible location for noise reduction and safety. The
motor. pump and valves are integral as a unit on the large
tank and the system is protected by a safety hydraulic
relief valve which is set at a specific P.S.!. setting to
protect machine. tools and operator.
The hydraulic cylinders are manufactured by Accurpress
from seamless tubing. Parker Type B Polypak and
Disogrin Compound 9250 seals assure excellent sealing
while Molygard wear rings and plated cylinder rods
provide lifetime durability.

.........cu p E P 10 t DIUI T
FRONT OPERATED MANUAL BACK GAUGE
This is a heavy duty precision back gauge bolted
to the back of the press brake and operated by a
rotary handle from the front. Range of adjustment
is from 0-27". Gauge position indication is
provided by a high quality Durant Digital
Mechanical Readout.
POWER OPERATED BACK GAUGES
Electric gear reducer push button operated. All
other features are the same as the manual
operated back gauge.
OIL COOLER
The oil cooler is standard on all press brakes 160
tons and larger. On smaller machines we
recommend a cooler be used if it is going to be
used in continuous production work or if the
machine is located in a place where the air
temperature exceeds 70 degrees F.
SECOND FOOT SWITCH
Some users may want a second foot switch wired
in so that the press will only function when both
foot pedals are depressed. Raising either foot
pedal will cause the ram to raise.
For single operator use a two position selector
switch on the electrical cabinet allows selection of
one or both foot switches.
OSHA CONTROL BAR
To keep the operator's hands away from the press
dies, an electrical control box can be attached to
the ram, containing two palm buttons which must
both be depressed to lower the ram. A selector
switch is provided on the electrical cabinet to
select either this mode of operation or
alternatively, the normal foot switch. The control
box also has an electric motor "stop" button and
motor running indicator light.
SWING STOCK ARMS
To facilitate supporting the plate being formed, 24
inch support arms are available. When not being
used they simply fold backwards against the bed
of the press brake.
ANGLE PLATES
To increase the bed or ram work surface area,
angle plates can be supplied 5lh x 5 1 h x length.
The angles are bolted to the bed and ram and both
front and back.
TONNAGE CONTROL
Tonnage control is available which will limit the
pressing tonnage to a pre-set load.
,he press tonnage is monitored by observing the
ydraulic system pressure and tonnage
conversion table. This system permits the operator
to manually adjust the available tonnage and is a
recommended feature when using bottoming dies
;n lieu of air bending.
MACHINE GROOVE IN BED
Standard product press brakes have a flat
machined bed surface. If a 3/4" wide groove is
required in the centre of the bed this must be
specified with the order. A smooth bed surface
allows positioning of the lower die to suit the
upper die and this standard surface satisfies
almost all the braking applications of our press
brakes.
POWER ECCENTRIC
On 320 ton press brakes and larger, a power
operated eccentric is standard. This is optional on
smaller presses.
The power eccentric is controlled by two push
buttons on press bed.
PRESS BRAKE CYCLE TIME
A modified hydraulic system is available to
increase press cycle time.
HARD RAM INSERTS
Hard ram inserts are to protect the ram under high
tonnages where there is a possibility of the upper
male die being pushed up into the ram. This option
IS recommended on large tonnage machines
where short dies are going to be used.

AC
P ES 1IC ....In..E PECIFI TI NS
7606 60 6 1I 10 ge 6 52 34 4 78 40 70 8 14 6 8 135 28 275 10 6,000
7608 60 7 X 11 ge 8 76 34 4 102 40 70 8 14 6 8 135 28 275 10 7,300
76010 60 8 X 1298 10 100 34 4 126 40 70 8 14 6 8 135 28 275 10 8,600
71008 100 8 X 3/16 8 76 34 6 102 42 86 8 14 6 8 97 28 190 20 9,500
710010 100 8 x 3/16 10 98 34 6 126 42 86 8 14 6 8 97 28 190 20 12.000
710012 100 8 x 3/16 12 122 34 6 150 42 86 8 14 6 8 97 28 190 20 13.000
713010 130 7 x 1/4 10 98 34 5 126 48 84 8 14 6 10 76 28 160 20 13,000
713012 130 7 x 1/4 12 122 34 5 150 48 90 8 14 6 10 76 28 160 20 15,000
713014 130 10 x 3/16 14 148 34 5 174 48 96 8 14 6 10 76 28 160 20 17,000
716010 160 9 x 1/4 10 100 34 8 126 52 86 8 14 6 10 71 20 160 20 20.000
716012 160 9 x 1/4 12 124 34 8 150 52 92­ 8 14 6 10 71 20 160 20 24.000
716014 160 12 x 3/16 14 148 34 8 174 52 98 8 14 6 10 71 20 160 20 28,000
720010 200 8x5/16 10 100 34 12 126 62 91 8 16 8 10 64 18 146 20 22,000
725010 250 10 x 3/8 10 100 34 12 126 70 98 8 16 8 10 57 16 130 20 26.000
725012 250 12 x 5/16 12 124 34 12 150 70 102 8 16 8 10 57 16 130 20 31.000
725014 250 14 x 1/4 14 148 34 14 174 70 108 8 16 8 10 57 16 130 20 34000
725016 250 16 x 3/16 16 172 34 12 38 198 70 112 8 16 8 10 57 16 130 20 38.000
-­
725020 250 18x3/16 20 198 34 12 60 246 70 128 8 16 8 10 57 16 130 20 58.000
732012 320 12 x 7/16 12 124 34 12 150 70 102 8 16 8 10 57 16 130 30 34.000
732014 320 14 x 3/8 14 148 34 12 174 70 108 8 16 8 10 57 16 130 30 37.000
732016 320 16 x 5/16 16 172 34 12 38 198 70 112 B 16 8 10 57 16 130 30 44,000
732020 320 20 x 3/16 20 198 34 12 60 246 70 128 B 16 8 10 57 16 130 30 64,000
740012 400 12 x 1/2 12 124 34 12 150 74 114 10 20 10 10 64 17 106 30 40.000
- -
740014 400 14 x 1/2 14 148 34 12 174 74 121 10 20 10 10 64 17 106 30 46.000
740016 400 16x3/8 16 148 34 12 48 198 74 121 10 20 10 10 64 17 106 30 52.000
740018 400 16 x 3/8 18 172 34 12 60 222 74 126 10 20 10 10 64 17 106 30 59.000
740020 400 20x5/16 20 198 34 12 68 246 74 134 10 20 10 10 64 17 106 30 68,000
750012 500 10 x 3/4 12 124 34 12 32 150 80 118 10 22 12 12 55 14 90 40 50,000
750014 500 14 x 5/8 14 148 34 12 36 174 80 124 10 22 12 12 55 14 90 40 54,000
750016 500 16 x 1/2 16 148 34 12 48 198 80 128 10 22 12 12 55 14 90 40 58,000
750020 500 20 x 3/8 20 198 34 12 72 246 80 140 10 22 12 12 55 14 90 40 79,000
750024 500 24 x 1/4 24 246 34 12 84 294 80 154 10 22 12 12 55 14 90 40 97,000
775016 750 16 x 5/8 16 150 34 12 49 198 82 131 12 24 12 12 55 15 85 60 90,000
775020 750 20 x 9/16 20 198 34 12 60 246 82 141 12 24 12 12 55 15 85 60 117,000
775024 750 24 x 1/2 24 246 34 12 00 294 82 154 12 24 12 12 55 15 85 60 132,000
7100020 1000 20 x 3/4 20 198 34 12 84 246 106 168 14 28 14 14 51 15 68 60 164,000
7100024 1000 24 x 5/8 24 246 34 12 08 294 106 178 14 28 14 14 51 15 68 60 190,000
71500,72000,73000 ­ consult facto SpeclflcatJons subject to chen e without notice.
Shipping heights are Approx. 6" less than overall heights shown

E RA E E DI G CART
1.8 1.5
1.8
4.1 3.2
4,4 2.9
4.4
7.4
6.1
7.7
9.5
61.7 45.8
11.2
85.2 63.6
48.8
13.1
110.0
86.2
70.0
16.9
138.0 110.0 93.0
165.0 137.0 104.0
• The tonnages indicated in boxes are for die
openings 8 times thickness of metal.
• 5/16" and over die openings should be 10 times
metal thickness. Larger openings greatly reduce
tonnages required.
• With an 8 to 1 die ratio the inside radius of a right
angle bend is approximately equal to the thickness
of the material. Bending pressures for other
metals, as compared to mild steel on chart, are as
follows:
- soft brass - 50% of pressure shown
- soft aluminum - 50% of pressure shown
- aluminum alloys heat-treated - same as steel
- stainless steel-50% more than steel
- chrome molybdenum - 100% more than steel.
• All of the above bending pressures are nominal
and represent average conditions. These values
are dependent upon the radii ofthe dies, theyield
strength of the material, the temper of the
material,the direction of the rolling strains, etc.
THEREFORE A SAFETY FACTOR OF AT LEAST
20% SHOULD BE PROVIDED IN SELECTING A
PRESS FOR A GIVEN JOB.