union pr 150 union pr 160 union pr 200 union pr 250

P-Series K-Series T-Series F-Series
UNION PR 150
UNION PR 160
UNION PR 200
UNION PR 250
CNC horizontal floor type boring mills with RAM

2
CNC horizontal floor type boring mills with RAM
PR 150, PR 160, PR 200, PR 250
These machines provide heavy duty milling, finishing and 5-side machining of large and heavy workpieces by integration of
floor plates, rotary, traversing and tilting tables and automatic accessory or heavy tool changing via pick up stations. The
machining envelope can be configured up to 40 m (131’ lengthwise) by 10 m (32.8’ vertical) with rotary table loads up to 250 t.
Classification
P = floor type
C = with automatic tool changer
R = with RAM
150, 160, 200, 250 = diameter of the boring spindle in mm
Example: PCR 200 = floor type boring mill with automatic tool changer and RAM; boring spindle diameter 200 mm
Main features
• completely closed hydrostatic guiding
system for guidance and movement
of RAM
• compensation of machine geometry by
using a load-dependent regulated
hydrostatic guide
• extremely stiff, double-walled, heavily
ribbed column
• different ways of drop-compensation for
Z-axis
• nitrided, axial adjustable boring spindle
with hardened spindle insert

RAM
Machine bed
• wide, welded bed with great static
stiffness
• backlash-free rack and double-pinion
drive
Technical features
PR 150, PR 160
Machine column
• welded steel construction
• Strong ribbed construction inside the
column provides great rigidity and
eliminates the need for a mechanical
counter-balance system
• two widely spaced ball screws
Guidance systems
optional design features
• with fully hydrostatic guidance system in
axes X, Y and Z or
• with hydrostatic guidance system in Z
axis and preloaded linear compact roller
guides in axes X and Y
Hydrostatic guided RAM
• completely closed hydrostatic guiding
system for guidance and movement
of RAM
• (3) different ways of drop-compensation
for RAM
• double bearing of the precision spindle
with life cycle lubrication
• thermal monitoring of the spindle
bearings
3

Guidance system
design as machine with fully hydrostatic
guidance system in axes X, Y and Z
Machine bed
• wide, heavily ribbed bed in solid casting
4
with two large guide ways
• drive of X axis by two water cooled
AC-motors (Master-slave) and backlash-
free rack
Technical features
PR 200, PR 250
Hydrostatic guided RAM
• completely closed hydrostatic guiding
system for guidance and movement
of RAM
• (3) different ways of drop-compensation
for RAM
• spindle bearing by preloaded high
precision spindle bearings
• thermal monitoring of the spindle
bearings
Machine column
• solid cast iron with reinforced outer
walls
• two large guide ways
• Y axis drive by two widely spaced ball
screws driven by two water cooled
AC-motors

Process monitoring
• tool breakage monitoring; automatic
tool identification systems
• tool and work piece measurement
(touch probe with radio wave transmis-
sion and tool measuring and crack
detection by laser beam)
• torque monitoring; collision monitoring
• capture of production data
• remote diagnosis
Process lubrication
• coolant units for inner and outer
coolant supply
• high pressure coolant units
• mist coolant device
Automatic change of special
accessories by using
pick up stations for
• a wide range of automatic and manual
milling heads
• NC-facing heads
• spindle support, spindle extensions
• special tools
Machine options
Technological solutions
• rotary and traversing tables with a load
up to 250 t
• tilting tables with controlled tilting axis
0…90°, swivelling tables
• carousel tables for turning operations
Automatic tool changer
• on-board tool magazine with up to
165 tools
• tool change into vertical or horizontal
heads possible
• trunion devices, floor plates,
clamping devices
• tool packages
• for SK 50, HSK 100 tools, others
available on request
5

Orthogonal milling head
with automatic positioning (2x360x1°)
automatic tool clamping, max power 30 kW
3 D touch probe
including measurement cycles for auto-
matic measurement of workpieces
Accuracies
machining accuracies
6
Optional accessories, milling heads,
machine accuracies
2 axis NC milling head
automatic tool clamping,
max power 37 kW
deviation from a straight line (reference traverse 630 mm) ≤ 20 µm
diameter accuracy (internal boring) IT 6
deviation from true circle (internal boring); diameter 160 mm ≤ 8 µm
deviation from true circle (external milling, circular); diameter 300 mm ≤ 20 µm
coaxiality of above mentioned circles ≤ 20 µm
positioning accuracy according to VDI/DGQ 3441
axes x, y, z
Adaptable milling heads (examples)
Accessories
Pick up stations
for automatic tool change into the milling
head
positioning uncertainty up to 5,000 mm P 25 µm
positioning uncertainty up to 10,000 mm P 32 µm
positioning uncertainty over 10,000 mm P 40 µm
positional scatter up to 5,000 mm Psmax 10 µm
reversal error up to 5,000 mm Umax 5 µm
positional deviation up to 5,000 mm Pa 8 µm
NC-facing head
for NC-contouring, facing and turning up
to 1250 mm diameters
Wireless handwheel
for utmost flexibility when setting work-
pieces

Technical data
Technical data
Layout
PR 150/160 PR 200/250
boring spindle
diameter mm 150/162 200/250
drive power, max. (S6) kW 68 110/130
torque, max. Nm 5,000 15,000/17,000
speed range, max. min-1 5...3,500 5...2,200/1,500
traverses axes
column cross traverse X mm 4,000 4,000
optional extension in steps of X mm 1,000 1,000
headstock vertical traverse Y mm 3,000 3,000
optional extension in steps of
500 mm up to max.
Y mm 6,000 10,000
RAM extension Z mm 1,000/1,500 1,600
boring spindle axial traverse
feeds / rapid traverses
W mm 700 1,000
feed range of all axes mm/min 1...6,000 1...6,000
rapid travers of linear axes max.
automatic tool changer
mm/min 25,000 22,000
number of tool pockets in the magazine 40 - 165 40 - 165
max. tool diameter if adjacent pockets are empty mm 250 250
max. tool length mm 500 500
max. tool weight kg 30 30
max. tool weight kg 38,500 81,500
subject to correction
UNION only gives general recommenda-
tions concerning the positioning of the
machine to the plate field. However, this
and the positioning of the clamping plates
to the height are variable and have to be
determined before order.
Layout of a PCR 150
model with x = 5,000 mm, y = 3,000 mm;
plate field 6,000 x 2,000 mm
7

UNION
Werkzeugmaschinen GmbH Chemnitz
Clemens-Winkler-Straße 5
D-09116 Chemnitz
Tel.: +49-371-8741-0
Fax: +49-371-8741-407
E-Mail: info@union-machines.com
www.union-machines.com
2011
e PR
postal address
UNION
change
Werkzeugmaschinen GmbH Chemnitz
to
P.O.Box 1142
D-09070 Chemnitz Subject