RB312 | JTEKT Machinery North America

Bridge Mills and Gantry Mills

Power and endurance for heavy jobs demanding accuracy and high productivity.

RB312

The RB312 is a heavy duty, double column, fixed rail bridge machine. This bridge features roller guides, a hydraulic counterbalance system on the headstock, and a two-speed, geared spindle.

RFQ


JTEKT Advantage ROI Justification MACHINE SELECTOR
Bridge Mill Machining Center
RB Bridge Mill Machining Center

FERROUS SPECS

Table Size 118" x 43.3" (3,000 mm x 1,100 mm)
X-Axis Travel 120.5" (3,060 mm)
Y-Axis Travel 47.2" (1,200 mm)
Z-Axis Travel 31.5" (800 mm)
Distance from Spindle Nose to Table Top 5.9" to 37.4" (150 mm to 950 mm)
Distance Between Columns 51.2" (1,300 mm)
Maximum Table Load 9,900 lb (4,500 kg)
Spindle Drive Motor (30 min. / cont.) 6,000 RPM: 25 HP (18.5 kW) / 20 HP (15 kW)
Table dimension (Y direction) 6,000 RPM: 388 ft-lb (526 Nm)
Spindle Speed Gearbox (CAT50):  6,000 RPM
Spindle motor power 945 ipm (24 m/min)
Spindle speed 945 ipm (24 m/min)
Spindle taper 590 ipm (15 m/min)
Maximum Cutting Feedrate 394 ipm (10 m/min)
Rapid feedrate - X axis 32 Standard (40 Optional)
Standard Floor Space 312" x 185" x 163" (7,930 mm x 4,700 mm x 4,150 mm)
Standard Net Weight 48,501 lb (22,000 kg)

NON-FERROUS SPECS

Table Size 118" x 43.3" (3,000 mm x 1,100 mm)
X-Axis Travel 120.5" (3,060 mm)
Y-Axis Travel 47.2" (1,200 mm)
Z-Axis Travel 31.5" (800 mm)
Distance from Spindle Nose to Table Top 5.9" to 37.4" (150 mm to 950 mm)
Distance Between Columns 51.2" (1,300 mm)
Maximum Table Load 9,900 lb (4,500 kg)
Spindle Drive Motor (30 min. / cont.) 10,000 RPM: 40 HP (29.8 kW) / 35 HP (26 kW)
Spindle Drive Motor (30 min. / cont.) 12,000 RPM: 40 HP (29.8 kW) / 35 HP (26 kW)
Spindle Drive Motor (30 min. / cont.) 20,000 RPM: 50 HP (37 kW) / 35 HP (26 kW)
Table dimension (Y direction) 10,000 RPM: 258 ft-lb (350 Nm)
Table dimension (Y direction) 12,000 RPM: 176.2 ft-lb (239 Nm)
Table dimension (Y direction) 20,000 RPM: 86 ft-lb (117 Nm)
Spindle Speed Direct Drive (CAT50): 10,000 RPM
Spindle Speed Integral Motor (CAT50): 12,000 RPM
Spindle Speed Integral Motor (HSK63): 20,000 RPM
Spindle motor power 945 ipm (24 m/min)
Spindle speed 945 ipm (24 m/min)
Spindle taper 590 ipm (15 m/min)
Maximum Cutting Feedrate 394 ipm (10 m/min)
Rapid feedrate - X axis 32 Standard (40 Optional)
Standard Floor Space 312" x 185" x 163" (7,930 mm x 4,700 mm x 4,150 mm)
Standard Net Weight 48,501 lb (22,000 kg)

HIGH TEMP ALLOY SPECS

Table Size 118" x 43.3" (3,000 mm x 1,100 mm)
X-Axis Travel 120.5" (3,060 mm)
Y-Axis Travel 47.2" (1,200 mm)
Z-Axis Travel 31.5" (800 mm)
Distance from Spindle Nose to Table Top 5.9" to 37.4" (150 mm to 950 mm)
Distance Between Columns 51.2" (1,300 mm)
Maximum Table Load 9,900 lb (4,500 kg)
Spindle Drive Motor (30 min. / cont.) 6,000 RPM: 25 HP (18.5 kW) / 20 HP (15 kW)
Spindle Drive Motor (30 min. / cont.) 12,000 RPM: 40 HP (29.8 kW) / 35 HP (26 kW)
Table dimension (Y direction) 6,000 RPM: 388 ft-lb (526 Nm)
Table dimension (Y direction) 12,000 RPM: 176.2 ft-lb (239 Nm)
Spindle Speed Gearbox (CAT50):  6,000 RPM
Spindle Speed Integral Motor (CAT50): 12,000 RPM
Spindle motor power 945 ipm (24 m/min)
Spindle speed 945 ipm (24 m/min)
Spindle taper 590 ipm (15 m/min)
Maximum Cutting Feedrate 394 ipm (10 m/min)
Rapid feedrate - X axis 32 Standard (40 Optional)
Standard Floor Space 312" x 185" x 163" (7,930 mm x 4,700 mm x 4,150 mm)
Standard Net Weight 48,501 lb (22,000 kg)

ACCURACY

Linear Position Accuracy± 0.0006" (0.015 mm) full travel
Linear Repeatability± 0.0001" (0.003 mm)

REEQUIREMENTS

Coolant Tank Capacity132 gallon
Air Source90 psi @ 3.78 CFM
Total power RequiredAC 220V ±10% (60 kVA)
Table Size 118" x 43.3" (3,000 mm x 1,100 mm)
X-Axis Travel 120.5" (3,060 mm)
Y-Axis Travel 47.2" (1,200 mm)
Z-Axis Travel 31.5" (800 mm)
Distance from Spindle Nose to Table Top 5.9" to 37.4" (150 mm to 950 mm)
Distance Between Columns 51.2" (1,300 mm)
Maximum Table Load 9,900 lb (4,500 kg)
Spindle Drive Motor (30 min. / cont.) 6,000 RPM: 25 HP (18.5 kW) / 20 HP (15 kW)
Table dimension (Y direction) 6,000 RPM: 388 ft-lb (526 Nm)
Spindle Speed Gearbox (CAT50):  6,000 RPM
Spindle motor power 945 ipm (24 m/min)
Spindle speed 945 ipm (24 m/min)
Spindle taper 590 ipm (15 m/min)
Maximum Cutting Feedrate 394 ipm (10 m/min)
Rapid feedrate - X axis 32 Standard (40 Optional)
Standard Floor Space 312" x 185" x 163" (7,930 mm x 4,700 mm x 4,150 mm)
Standard Net Weight 48,501 lb (22,000 kg)
Table Size 118" x 43.3" (3,000 mm x 1,100 mm)
X-Axis Travel 120.5" (3,060 mm)
Y-Axis Travel 47.2" (1,200 mm)
Z-Axis Travel 31.5" (800 mm)
Distance from Spindle Nose to Table Top 5.9" to 37.4" (150 mm to 950 mm)
Distance Between Columns 51.2" (1,300 mm)
Maximum Table Load 9,900 lb (4,500 kg)
Spindle Drive Motor (30 min. / cont.) 10,000 RPM: 40 HP (29.8 kW) / 35 HP (26 kW)
Spindle Drive Motor (30 min. / cont.) 12,000 RPM: 40 HP (29.8 kW) / 35 HP (26 kW)
Spindle Drive Motor (30 min. / cont.) 20,000 RPM: 50 HP (37 kW) / 35 HP (26 kW)
Table dimension (Y direction) 10,000 RPM: 258 ft-lb (350 Nm)
Table dimension (Y direction) 12,000 RPM: 176.2 ft-lb (239 Nm)
Table dimension (Y direction) 20,000 RPM: 86 ft-lb (117 Nm)
Spindle Speed Direct Drive (CAT50): 10,000 RPM
Spindle Speed Integral Motor (CAT50): 12,000 RPM
Spindle Speed Integral Motor (HSK63): 20,000 RPM
Spindle motor power 945 ipm (24 m/min)
Spindle speed 945 ipm (24 m/min)
Spindle taper 590 ipm (15 m/min)
Maximum Cutting Feedrate 394 ipm (10 m/min)
Rapid feedrate - X axis 32 Standard (40 Optional)
Standard Floor Space 312" x 185" x 163" (7,930 mm x 4,700 mm x 4,150 mm)
Standard Net Weight 48,501 lb (22,000 kg)
Table Size 118" x 43.3" (3,000 mm x 1,100 mm)
X-Axis Travel 120.5" (3,060 mm)
Y-Axis Travel 47.2" (1,200 mm)
Z-Axis Travel 31.5" (800 mm)
Distance from Spindle Nose to Table Top 5.9" to 37.4" (150 mm to 950 mm)
Distance Between Columns 51.2" (1,300 mm)
Maximum Table Load 9,900 lb (4,500 kg)
Spindle Drive Motor (30 min. / cont.) 6,000 RPM: 25 HP (18.5 kW) / 20 HP (15 kW)
Spindle Drive Motor (30 min. / cont.) 12,000 RPM: 40 HP (29.8 kW) / 35 HP (26 kW)
Table dimension (Y direction) 6,000 RPM: 388 ft-lb (526 Nm)
Table dimension (Y direction) 12,000 RPM: 176.2 ft-lb (239 Nm)
Spindle Speed Gearbox (CAT50):  6,000 RPM
Spindle Speed Integral Motor (CAT50): 12,000 RPM
Spindle motor power 945 ipm (24 m/min)
Spindle speed 945 ipm (24 m/min)
Spindle taper 590 ipm (15 m/min)
Maximum Cutting Feedrate 394 ipm (10 m/min)
Rapid feedrate - X axis 32 Standard (40 Optional)
Standard Floor Space 312" x 185" x 163" (7,930 mm x 4,700 mm x 4,150 mm)
Standard Net Weight 48,501 lb (22,000 kg)
Linear Position Accuracy± 0.0006" (0.015 mm) full travel
Linear Repeatability± 0.0001" (0.003 mm)
Coolant Tank Capacity132 gallon
Air Source90 psi @ 3.78 CFM
Total power RequiredAC 220V ±10% (60 kVA)

Specifications are subject to change without notice.

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Full Line of Bridge Mills and Gantry Mills

VB Series

Job Shop FANUC Oi Double Column Bridge Mill
X-Axis: 79.5" (2,020mm) to 158.2" (4,020mm)
Y-Axis: 59" (1,500mm) to 78.7" (2,000mm)
Z-Axis: 31.5" (800mm)
Spindle: #50 6,000 RPM Geared Head

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RB Series

FANUC 31i Double Column Bridge Mill
X-Axis: 83.5" (2,120mm) to 120.5" (3,060mm)
Y-Axis: 47.2" (1,200mm)
Z-Axis: 31.5" (800mm)
Spindle: #50 6K Geared or Highspeed Options

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SB Series

FANUC 31i Double Column Bridge Mill
X-Axis: 83.5" (2,120mm) to 159.8" (4,060mm)
Y-Axis: 63" (1,600mm) to 90.5" (2,300mm)
Z-Axis: 31.5" (800mm) to 39.3" (1000mm)
Spindle: Geared Head or Highspeed Options
Five-Face/Right Angle Head Capable

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LB Series

FANUC 31i Double Column Bridge Mill
X-Axis: 120.5" (3,060mm) to 253.8" (10,000mm)
Y-Axis: 84.6" (2,150mm) to 157.5" (4,000mm)
Z-Axis: 31.5" (800mm) to 55.1" (1400mm)
Spindle: Geared Head or Highspeed Options
Five-Face/Right Angle Head Capable

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LB Series (cont.)

FANUC 31i Double Column Bridge Mill
X-Axis: 120.5" (3,060mm) to 253.8" (10,000mm)
Y-Axis: 84.6" (2,150mm) to 157.5" (4,000mm)
Z-Axis: 31.5" (800mm) to 55.1" (1400mm)
Spindle: Geared Head or Highspeed Options
Five-Face/Right Angle Head Capable

View Models
MG Series Gantry Mill

MG Series

FANUC 31i Moving Gantry Mill
X-Axis: 197" (5,000mm) to 787.4" (20,000mm)
Y-Axis: 118.1" (3,000mm) to 236.2" (6,000mm)
Z-Axis: 31.5" (800mm) to 55.1" (1400mm)
Spindle: Geared Head or Highspeed Options
Five-Face/Right Angle Head Capable

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MG Series Gantry Mill

MG Series (cont.)

FANUC 31i Moving Gantry Mill
X-Axis: 197" (5,000mm) to 787.4" (20,000mm)
Y-Axis: 118.1" (3,000mm) to 236.2" (6,000mm)
Z-Axis: 31.5" (800mm) to 55.1" (1400mm)
Spindle: Geared Head or Highspeed Options
Five-Face/Right Angle Head Capable

View Models