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WB (BASELine) Linear Units (Legacy)

WB (BASELine) Linear Units (Legacy)

Thomson's WB (BASELine) (Legacy) linear drive models (WB40/60) provide enhanced reliability combined with very low maintenance requirements. With a low-backlash single nut within an aluminum profile, these units can be screwed directly to the machine frame using mounting strips. The compact interface between the linear drive unit and the motor, called the power bridge, now has the same flat design of earlier versions.

Browse Part Numbers

Overview

WB Specifications:

Specifications / Shaft Size WB40 WB60
Profile size (w x h): mm (in) 40 x 37 (1.6 x 1.5) 60 x 59 (2.4 x 2.3)
Max Linear Speed: m/s (in/s) 0.25 (9.8) 1 (39.4)
Repeatability: ± mm (in) 0.05 (0.002) 0.05 (0.002)
Max Acceleration: m/s2 (in/s2) 5 (197) 5 (197)
Max Input Speed: rpm (rev/s)
ball screw units
lead screw units with composite nut		 3000 (50)
1500 (25)		 3000 (50)
1500 (25)
Operation temperature limits: °C (°F) 0 to 80 (32 to 176) 0 to 80 (32 to 176)
Max Dynamic Load (Fx): N (lbf)
ball screw units / lead screw units		 200 / 500 (45 / 112) 2500 / 2500 (562 / 562)
Max Dynamic Load (Fy): N (lbf)
complete unit		 200 (45) 500 (112)
Max Dynamic Load (Fz): N (lbf)
complete unit		 250 (56) 650 (146)
Max Dynamic Load Moment (Mx): Nm (lbf-in)
complete unit		 6 (53) 30 (266)
Max Dynamic Load Moment (My): Nm (lbf-in)
complete unit		 15 (133) 70 (620)
Max Dynamic Load Moment (Mz): Nm (lbf-in)
complete unit		 10 (89) 50 (443)
Max Drive Shaft Force (Frd): N (lbf) 80 (18) 150 (34)
Max Drive Shaft Torque (Mta): Nm (lbf-in) 1 (8.9) 17 (150.5)
Screw Diameter: mm (in) 12 (0.47) 20 (0.79)
Screw Lead: mm (in)
ball screw units / lead screw units		 5 / 4.8 (0.2 / 0.19) 5.20 / 8 (0.21 / 0.32)
Weight: kg (lb)
of unit with zero stroke
of every 100 mm of stroke
of each carriage		 1.07 (10.5)
0.30 (0.66)
0.45 (0.99)		 3.63 (8.0)
0.72 (1.6)
1.17 (2.6)

WB Feature Highlights:

  • Robust slide guides
  • Ball or lead screw drives
  • Plastic cover band
  • Central lubrication system
CAD Models

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