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GS12

Spur gearhead platform. 8 published ratios, 6 published configurations.

Diameter
12mm
Ratio range
7.49 to 208.79:1
Stages
2 to 5
Rated output torque
4.9 to 24.5 mN·m
Length
12.8 mm
Revision
A, reviewed 2026-08-18

Envelope

12.8 mm overall ⌀ 12.0 mm
Side elevation of the GS12 gearhead at its shortest published ratio, 7.49:1 over 2 stages, drawn to scale from ⌀12.0 mm by 12.8 mm. Length grows with stage count; every ratio's own length is in the table below.

Every published ratio

Length, rated output torque and typical efficiency change with the stage count. The bore, the mounting face and the diameter do not.

GS12 ratios
SKU Ratio :1 Stages Length mm Rated output torque mN·m Typical efficiency % Output rotation
MM-GS12-00075 7.49212.84.981Same as motor
MM-GS12-00156 15.56312.811.873Reversed
MM-GS12-00311 31.12412.824.566Same as motor
MM-GS12-00523 52.25412.824.566Same as motor
MM-GS12-00720 71.99412.824.566Same as motor
MM-GS12-01002 100.22512.824.559Reversed
MM-GS12-01440 143.99512.824.559Reversed
MM-GS12-02088 208.79512.824.559Reversed

Tick up to 4 products, then compare them side by side.

What this gearhead fits.

Published configurations using GS12
Configuration Ratio :1 No-load output speed rpm Continuous output torque mN·m Torque margin ×
MM-C1213-S00523-030B52.25254.53.47.25
MM-C1213-S01440-030B143.9992.48.32.94
MM-C1219-S00523-045A52.25167.3102.45
MM-C1219-S00720-030B71.99144.59.32.63
MM-C1226-S00523-060A52.25145.110.12.42
MM-C1226-S01002-120A100.22105.89.32.64