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Gantry
Travelling Column Boring & Milling Machining Centers
Distance between columns from 6 m
to 16 m (20’ ~ 52’)
Gantry Milling Machines
(Gantry) – As the inventor of gantry travelling column milling machines in the early 1950’s. The former
SCHIESS company was known for building extremely large machines of this type. The maximum distance between columns that was ever built by the former
SCHIESS company was an incredible 14 m (46’).
SCHIESS BRIGHTON continues this tradition by offering large gantry mills with horizontal X-axis travels up to 60 m (196’), horizontal Y-axis travels up to 18 m (59’), distance between columns up to
16 m (52’), 14 m (46’) in height and loading capacity up to 1000 tons with a wide variety of accessories to match different machining applications, such as rotary tables up to 12.5 m (41’) diameter, floor plates, tool and head changers, special milling heads and other customized tools.
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Specifications
& Range |
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Model
No. |
Gantry-SGM |
Unit |
(Imperial) |
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Machine
Type |
Gantry
Moving |
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X-Axis
Travel |
12
- 60 |
m |
(39'
- 196') |
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Y-Axis
Travel |
7
- 18 |
m |
(23'
- 59') |
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Z-Axis
Travel (Ram) |
2
- 4.5 |
m |
(6.5'
- 15') |
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W-Axis
Travel (Crossrail) |
3
- 10 |
m |
(10'
- 33') |
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Distance
Between Columns |
6
- 16 |
m |
(20'
- 52') |
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Machine
Height (Z + W) |
5
- 14 |
m |
(16'
- 46') |
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Ram
Shape |
Square |
|
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Option
1 Ram
Cross Section |
420
x 520 |
mm |
(17"
x 20") |
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Spindle
Power |
63 |
kW |
(84
HP) |
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Option
2 Ram
Cross Section |
600
x 700 |
mm |
(23"
x 27") |
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Spindle
Power |
90 |
kW |
(120
HP) |
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Max.
Torque |
9000/18000 |
Nm |
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Max.
Spindle Speed |
2500/1250 |
rpm |
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Taper |
#50/60 |
ISO |
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Table
Diameter |
6
- 12.5 |
m |
(20'
- 41') |
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Swing
Diameter |
8
- 15 |
m |
(26'
- 49') |
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Max.
Torque on Table |
1000 |
kNm |
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Loading
Capacity |
100
-1000 |
ton |
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Note: The above data represent the maximum values of the specification of the machine. Imperial dimensions are in brackets. The company reserves the right to make
changes.
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GanMill Features
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The movable gantry uses multiple servo-motors to drive the columns in the X-axis through a system of racks and pinions. The motors operate synchronously and in tandem for high traverse rates, and asynchronously to eliminate backlash in the milling feed mode. Additionally, the two sets of motors are electronically coupled and monitored so that the extremely high accuracy of the vertical parallelism of the column motions can be maintained.
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The cross rail of the gantry uses two set of servo-motors, which directly drive two re-circulating ball screws in the vertical W-axis. Similar X-axis described above, the W-axis servo motors are also electronically coupled and error compensated, so that the extremely high accuracy of the horizontal parallelism of the cross rail motion can also be maintained.
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The ram travels in the Y-axis on the cross rail driven by a rack-and-pinion system with a similar servo motor arrangement as in the X-axis, so that high traverse speeds are obtained, without excessive backlash errors.
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