DC Gear Motor with Encoder:

Reduction Ratio: 29,31, 56, 73, 107, 140,182, 195, 268, 349, 456, 488
GM20-180SH-09450

Reduction ratio	29	31	56	73	107	182	268	349	456	488
Length mm	15.9	15.9	17.4	17.4	18.9	18.9	20.4	20.4	20.4	20.4
No-load speedrpm	145	135	75	57	39	23	16	12	9	9
Rated speedrpm	120	113	62	48	33	19	13	10	8	8
Rated torquekg.cm	0.23	0.24	0.5	0.6	0.8	1.4	1.9	2.3	3.0	3.0
Max.momentary tolerance torque kg.cm	1.0	1.1	2.0	2.6	3.8	5.0	5.0	5.0	5.0	5.0

GM20-180SH-18140

Reduction ratio	29	31	56	73	107	182	268	349	456	488
Length mm	15.9	15.9	17.4	17.4	18.9	18.9	20.4	20.4	20.4	20.4
No-load speedrpm	230	215	120	90	62	37	25	19	15	14
Rated speedrpm	180	170	95	73	50	29	20	16	13	13
Rated torquekg.cm	0.4	0.4	0.7	0.9	1.3	2.2	3.0	3.0	3.0	3 .1
Max.momentary tolerance torque kg.cm	1.5	1.6	2.8	3.7	5.0	5.0	5.0	5.0	5.0	5.0

GM20-180SH-10400

Reduction ratio	29	31	56	73	107	182	268	349	456	488
Length mm	15.9	15.9	17.4	17.4	18.9	18.9	20.4	20.4	20.4	20.4
No-load speedrpm	340	310	175	135	95	55	38	29	22	21
Rated speedrpm	300	280	155	120	81	48	32	26	20	20
Rated torquekg.cm	0.4	0.4	0.7	0.9	1.3	2.2	3.0	3.0	3.0	3.0
Max.momentary tolerance torque kg.cm	3.1	3.4	5.0	5.0	5.0	5.0	5.0	5.0	5.0	5.0

Dimension: