GP08

Planetary gearhead platform. 5 published ratios, 1 published configuration.

Diameter: 8mm
Ratio range: 4 to 1,024:1
Stages: 1 to 5
Rated output torque: 10 to 100 mN·m
Length: 8.8 to 19 mm
Revision: A, reviewed 2026-08-18

Envelope

Side elevation of the GP08 gearhead at its shortest published ratio, 4:1 over 1 stage, drawn to scale from ⌀8.0 mm by 8.8 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.

GP08 ratios
SKU	Ratio :1	Stages	Length mm	Rated output torque mN·m	Typical efficiency %	Output rotation
Compare MM-GP08-00040 MM-GP08-00040	4	1	8.8	10	90	Same as motor
Compare MM-GP08-00160 MM-GP08-00160	16	2	11.3	20	81	Same as motor
Compare MM-GP08-00640 MM-GP08-00640	64	3	13.9	60	66	Same as motor
Compare MM-GP08-02560 MM-GP08-02560	256	4	16.4	80	58	Same as motor
Compare MM-GP08-10240 MM-GP08-10240	1,024	5	19	100	42	Same as motor

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

What this gearhead fits.

Published configurations using GP08
Configuration	Ratio :1	No-load output speed rpm	Continuous output torque mN·m	Torque margin ×
MM-C0817-P02560-030A	256	62.5	22.3	3.59