Gearboxes

Dunkermoteren PLG42K Series Planetary Gearbox

The Dunkermotoren PLG 42K Series Planetary Gearbox is a compact, high-efficiency gear solution designed for precision applications that demand reliable torque transmission in a small form factor. With reduction ratios from 4:1 up to 512:1 and continuous torque capabilities reaching 3 Nm, this gearbox is ideal for robotics, medical devices, and l...

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The Dunkermotoren PLG 42K Series Planetary Gearbox is a compact, high-efficiency gear solution designed for precision applications that demand reliable torque transmission in a small form factor. With reduction ratios from 4:1 up to 512:1 and continuous torque capabilities reaching 3 Nm, this gearbox is ideal for robotics, medical devices, and light industrial automation.

Key features include high operating efficiency, up to 90% in single-stage configurations and straight-toothed gear stages for smooth and consistent performance. The PLG 42K features a double ball bearing-supported output shaft for increased durability and load handling, with axial loads up to 150 N and radial loads up to 230 N. The plastic ring gear construction allows for reduced weight without sacrificing performance, making it well-suited to compact installations.

Available in 1-, 2-, or 3-stage versions, the PLG 42K Series is designed for maintenance-free operation with lifetime lubrication. Its IP50 protection rating and robust vibration resistance further support long-term use in controlled environments.

For compact, precise, and efficient drive solutions, the Dunkermotoren PLG 42K Series Planetary Gearbox delivers exceptional value in motion control and automation systems.

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Features
  • Compact, High-Efficiency Design: Delivers up to 3 Nm of continuous torque with up to 90% efficiency in single-stage models—perfect for space-constrained automation systems.
  • Wide Range of Gear Ratios: Available in 1-, 2-, and 3-stage configurations with reduction ratios from 4:1 to 512:1, offering flexibility for speed-torque optimisation.
  • Dual Ball Bearing Support: Output shaft is supported by double ball bearings, ensuring smooth operation and extended service life under axial and radial loads.
  • Lightweight Yet Durable Build: Features a high-performance plastic ring gear for weight reduction without compromising strength or long-term performance.
  • Maintenance-Free Operation: Factory-lubricated for life and designed for quiet, reliable performance—no routine maintenance required.
  • High Load Handling Capability: Supports axial loads up to 150 N and radial loads up to 230 N, making it ideal for dynamic and precision-driven motion systems.
Specifications
PLG42K Specifications
Reduction Ratio - 4 6.25 8 16 25 32 50 64 100 128 156.25 200 256 312.5 400 512
Efficiency % 90 81 73
Number of Stages - 1 2 3
Continous Torque Nm 0.7 1.3 3
Weight of Gearbox kg 0.16 0.20 0.25
Axial Load / Radial Load* N 150 / 230 150 / 230 150 / 230
* From center of shaft

 

Downloads
plg_42k_Gearbox_Datasheet.pdf
Warranty & Returns

Warranty periods vary by product. Please refer to the Powerbox Warranty Policy for the applicable coverage period against manufacturing defects from date of purchase. For returns and RMA requests, please visit our RMA support page or contact our support team directly.

FAQs
The PLG 42K is available in 1-, 2-, and 3-stage configurations with reduction ratios from 4:1 up to 512:1, and delivers up to 3 Nm of continuous torque, with up to 90% efficiency in single-stage models.
The output shaft is supported by double ball bearings and rated for axial loads up to 150 N and radial loads up to 230 N, suitable for dynamic, precision-driven motion systems.
No, it's designed for maintenance-free operation with factory lifetime lubrication, so no routine servicing or relubrication is needed under normal operating conditions.
It carries an IP50 protection rating and offers robust vibration resistance, making it well suited to controlled industrial, robotics, and medical device environments rather than washdown or outdoor applications.
The PLG 42K uses a plastic ring gear construction, which reduces overall weight compared to an all-metal gearbox while still meeting the torque and load ratings specified for the series.
It's designed as a planetary gearbox attachment for Dunkermotoren drive systems; for exact motor compatibility and shaft/flange dimensions, refer to the PLG 42K datasheet or contact Powerbox to confirm the right pairing for your motor.