Gearboxes

Dunkermoteren PLG40LB Series Planetary Gearbox

The Dunkermotoren PLG 40 LB Series Planetary Gearbox is a low-backlash, high-efficiency gear solution designed for dynamic and high-precision drive applications. With reduction ratios from 3:1 to 120:1 and continuous torque capabilities up to 20 Nm, this gearbox is ideal for use in robotics, automation, and motion control systems where reliable torque transmission and compact design are essential.

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Features

  • Low-Backlash Design: Engineered for precision motion control, the PLG 40 LB features reduced backlash, making it ideal for applications requiring accurate positioning and repeatability.
  • High Torque Output in Compact Form: Delivers continuous torque up to 20 Nm and peak torque up to 35 Nm, all within a compact housing suited for tight installation spaces.
  • Extended Service Life: Built for longevity, with hardened steel ring gears and needle-bearing-supported planetary wheels that enable over 20,000 hours of reliable operation.
  • Wide Ratio and Stage Flexibility: Available in 1-, 2-, and 3-stage configurations with reduction ratios from 3:1 to 120:1, allowing optimal speed-torque matching across diverse applications.
  • High Efficiency and Load Capacity: Achieves up to 97% efficiency in single-stage versions and supports axial loads up to 65 N and radial loads up to 200 N (13 mm from mounting face).
  • Adaptable for Harsh Environments: Standard IP52 protection with optional upgrades to IP54 or IP65, plus available food-grade and low-temperature lubrication for specialized applications.
Specifications
PLG40 LB Specifications
Reduction Ratio - 3 4 5 7 8 10 9 12 15 16 20 25 32 40 64
Efficiency % 97 95
Number of Stages - 1 2
Continous Torque 1) Nm 4 7 7 6 5 4 7 7 7 7 7 7 7 7 6
Continous Torque 2) 5) Nm 9 15 14 8.5 6 5 16.5 20 18 20 20 18 20 18 7.5
Acceleration torque 3) Nm 8 14 14 8.5 6 5 14 14 14 14 14 14 14 14 7.5
Emergency stop torque 4) Nm 19 25 31 26 27 27 33 40 36 40 40 36 40 36 27
Max. backlash arcmin 15 19
Weight of Gearbox kg 0.4 0.5
Axial Load / Radial Load (13 mm off mounting surface) 5 N 65/200
1) S8 Operation mode (alternating load) motor speed = 3000 rpm
2) S1 Operation mode (swelling load) gearbox output speed = 100 rpm; service lifetime check by application consulting required/
3) S8 Operating mode (alternating load); within max. 1 second
4) Statically 100 times alternating
5) Related to gearbox output speed = 100 rpm

 

Downloads
plg_40_lb_Gearbox_Datasheet.pdf
PLG40 LB Specifications
Reduction Ratio - 3 4 5 7 8 10 9 12 15 16 20 25 32 40 64
Efficiency % 97 95
Number of Stages - 1 2
Continous Torque 1) Nm 4 7 7 6 5 4 7 7 7 7 7 7 7 7 6
Continous Torque 2) 5) Nm 9 15 14 8.5 6 5 16.5 20 18 20 20 18 20 18 7.5
Acceleration torque 3) Nm 8 14 14 8.5 6 5 14 14 14 14 14 14 14 14 7.5
Emergency stop torque 4) Nm 19 25 31 26 27 27 33 40 36 40 40 36 40 36 27
Max. backlash arcmin 15 19
Weight of Gearbox kg 0.4 0.5
Axial Load / Radial Load (13 mm off mounting surface) 5 N 65/200
1) S8 Operation mode (alternating load) motor speed = 3000 rpm
2) S1 Operation mode (swelling load) gearbox output speed = 100 rpm; service lifetime check by application consulting required/
3) S8 Operating mode (alternating load); within max. 1 second
4) Statically 100 times alternating
5) Related to gearbox output speed = 100 rpm

 

plg_40_lb_Gearbox_Datasheet.pdf

Find the Right Model

Model Number Reduction Ratio Continuous Torque (Nm) Number of Stages
product variant PLG40LB-3 3 4 1
product variant PLG40LB-4 4 7 1
product variant PLG40LB-5 5 7 1
product variant PLG40LB-7 7 6 1
product variant PLG40LB-8 8 5 1
product variant PLG40LB-9 9 4 1
product variant PLG40LB-10 10 7 1
product variant PLG40LB-12 12 7 2
product variant PLG40LB-15 15 7 2
product variant PLG40LB-16 16 7 2
product variant PLG40LB-20 20 7 2
product variant PLG40LB-25 25 7 2
product variant PLG40LB-32 32 7 2
product variant PLG40LB-40 40 7 2
product variant PLG40LB-64 64 6 2
product variant PLG40LB-60 60 7 3
product variant PLG40LB-80 80 7 3
product variant PLG40LB-100 100 7 3
product variant PLG40LB-120 120 7 3

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