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NemaTRUE™ gearheads are available in four standard NEMA sizes, three metric sizes, and both in-line and right-angle versions. All models feature our RediMount™ system for quick, error-free mounting to almost any motor. These precision gearheads provide a versatile and economical solution for many applications. We have many ratios in stock for immediate delivery through our Gearhead Express program.

Limited availability outside North America
NemaTRUE Large



  • Backlash: 13 arc-min
  • In-line and right-angle models
  • Ratios available from 1:1 to 500:1
  • Sealed deep groove ball bearings for precise alignment of sun gear
  • HRC 55-60 steel gears
  • Anodized aluminum housing
  • RediMount™ system


  • High radial load carrying capability
  • PowerTRUE™ gear technology provides high torque capacity in a compact package for right-angle applications
  • Superior wear resistance and increased backlash integrity
  • Fast, error-free mounting to almost any motor
  • Lightweight, corrosion-resistant housing


Mounting Type Units Inline Right-angle
Precision   13 arc-minutes 13 arc-minutes
Frame Sizes mm 17, 23/60, 34/90, 42/115 23, 34, 42
Torque Capacity Nm (lb-ft) up to 180 (133) up to 255 (188)
Ratio Availability   3:1, 5:1, 10:1, 15:1, 25:1
30:1, 50:1, 100:1
1:1, 2:1, 3:1, 4:1, 5:1P, 5:1T, 6:1
9:1, 10:1, 12:1, 15:1, 20:1, 25:1
30:1, 40:1, 50:1, 60:1, 75:1, 90:1
100:1, 120:1, 125:1, 150:1, 200:1
250:1, 300:1, 400:1, 500:1
Radial Load Capacity N (lbf) up to 3730 (839) up to 2900 (652)
Mounting System   RediMount™ RediMount™

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Title Language(s) Date Size
pdfTrue Planetary Gearheads Installation EN rev2008 English 06 Oct 2011 325.64 KB Copy URL
Title Language(s) Date Size
Kollmorgen Automation and Motion Control English 14 Jun 2021 15.53 MB Copy URL
True Planetary Gearheads Catalog EN English 13 Mar 2012 4.73 MB Copy URL
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True Planetary Gearheads Brochure de-DE rev2005 English 02 Feb 2012 922.54 KB Copy URL
True Planetary Gearheads Brochure it-IT 2005 English 02 Feb 2012 371.57 KB Copy URL
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NemaTRUE 90 Right Angle Gearheads English Copy URL
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Blue Guide German 15 Jul 2015 Copy URL