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38–43 mm Frameless Motors

Flexible choices across performance, reliability, and cost.

Model Comparison

Compare 38–43 mm frameless motor models and key specifications.

Series	Model	Stator ODmm	Rotor IDmm	Stator Lengthmm	Rated TorqueNm	Peak TorqueNm	Rated Speedrpm	Rated VoltageVDC	Rated CurrentArms	Peak CurrentArms	KtNm/Arms	KmNm/√W	Weightg	View Details
Pro	3806-A2	38	20	11.8	0.09	0.27	12,000	24	7	21	0.0145	0.0395	35	View Details
Pro	3806-B2	38	20	11.8	0.094	0.27	5,000	24	3.4	9.8	0.0307	0.0434	35	View Details
Pro	3812-A2	38	20	18.3	0.186	0.58	10,200	48	6.2	19.2	0.035	0.0711	65	View Details
Pro	3812-B2	38	20	18	0.189	0.502	6,000	48	3.4	9.8	0.062	0.0726	60	View Details
Ultra	3806-AT	38	20	11.2	0.12	0.36	12,000	24	7.7	25	0.018	0.0521	60	View Details
Ultra	3806-BT	38	20	11.2	0.12	0.36	8,000	24	5.4	18	0.0253	0.0532	60	View Details
Ultra	3806-CT	38	20	11.2	0.13	0.363	5,000	24	4	12.5	0.0362	0.0552	60	View Details
Ultra	3812-AL	38	20	17.2	0.24	0.72	8,000	48	5	16.5	0.0543	0.0911	90	View Details
Ultra	3812-BL	38	20	17.2	0.24	0.72	5,000	48	3.66	12	0.0743	0.0922	90	View Details
Ultra	3812-CL	38	20	17.2	0.25	0.72	3,000	48	2.65	8.25	0.1087	0.0936	90	View Details
Precision	3808	38	18	12.5	0.1	0.4	9,000	24	3.54	14.85	0.028	0.036	55	View Details
Precision	3814	38	18	19	0.23	0.76	8,500	48	4.31	14.85	0.052	0.06	82	View Details
Pro	4304-AT	43	25.5	10.8	0.08	0.238	2,000	24	2.8	8.6	0.0315	0.0394	28	View Details
Pro	4308-AS	43	25.5	14.8	0.152	0.456	7,600	36	4	12	0.0436	0.0677	57	View Details
Pro	4320-AL	43	25.5	26.8	0.42	1.31	3,400	48	3.8	12	0.124	0.1446	120	View Details
Ultra	4310-AL	43	25.5	16.5	0.25	0.77	8,000	48	5.1	16.2	0.0554	0.095	80	View Details
Ultra	4310-BL	43	25.5	16.5	0.25	0.77	5,000	48	3.5	11	0.0814	0.0976	80	View Details
Ultra	4310-CL	43	25.5	16.5	0.25	0.76	3,000	48	2.3	7.2	0.1221	0.0968	80	View Details
Ultra	4320-AL	43	25.5	26.5	0.5	1.54	5,500	48	6.8	22	0.0814	0.1538	135	View Details
Ultra	4320-BL	43	25.5	26.5	0.5	1.55	3,600	48	5	16.2	0.111	0.1554	135	View Details
Ultra	4320-CL	43	25.5	26.5	0.51	1.54	2,200	48	3.5	11	0.1628	0.1585	135	View Details

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