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CB Unit 121

The model 121 has an external clutch and brake. It contains a separate shaft system combined in a lightweight aluminum housing, whereby the input shaft rotates constantly and the output shaft can be clocked arbitrarily.

From 5 to 350 Nm
Aluminum housing
Backlash free
High positioning accuracy
Long lifetime and service friendly

PDF Datasheet PDF Catalog

Dimensions Electromagnetic Clutch and brake unit 121-12G by Miki Pulley


Model	Rated torque (Nm)	Heat class	Max. rpm (min^-1)	Moment of inertia J (kg·m²)	Max braking energy E_bal (J)	Total braking energy E_T (J)	Pull in time t_a (s)	Torque build up t_p (s)	Mass (kg)
121-06-20G	5	B	3000	1.43 × 10^-4	500	36 × 10⁶	0.02	0.041	1.5
121-08-20G	10	B	3000	4.23 × 10^-4	800	60 × 10⁶	0.023	0.051	2.7
121-10-20G	20	B	3000	1.42 × 10^-3	1500	130 × 10⁶	0.025	0.063	5.5
121-12-20G	40	B	3000	4.18 × 10^-3	1500	250 × 10⁶	0.04	0.115	9.6
121-16-20G	80	B	3000	1.34 × 10^-2	1800	470 × 10⁶	0.05	0.16	18.5
121-20-20G	160	B	2500	4.13 × 10^-2	2000	10 × 10⁸	0.09	0.25	35
121-25-20G	320	B	2000	1.02 × 10^-1	1800	20 × 10⁸	0.115	0.335	64

Dimensions of electromagnetic clutch and brake model 121

Unit [mm]


Model	A₁	A₂	B₁	B₂	C	D	E	F	G	H	J₁	J₂	K	L	M	N
121-06-20G	52.5	75	80	90	55	80	27.5	53	2.6	95	65.5	40.5	105.5	181	47	33
121-08-20G	65	90	90	105	65	100	27.5	61	2.6	115	78.5	48.5	126.5	217	57	37
121-10-20G	80	110	110	130	80	125	32.5	72	3.2	142.5	98	62	154	270	72	47
121-12-20G	105	135	140	160	90	150	35	81	3.2	165	121	73.5	184	330	92	52
121-16-20G	135	160	175	185	112	190	43	97	4.5	207	149	90	221	399	113	62
121-20-20G	155	200	200	230	132	230	45	109	6	247	187	117	276	504	142	74.5
121-25-20G	195	240	240	270	160	290	47.5	124	20	305	238	154	334	632	183	101.5

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