Model 122 (Dual-Clutch Brake)

This double clutch-brake unit compactly combines two electromagnetic clutches and an electromagnetic brake. It handles application-specific control tasks—such as high-precision positioning and complex operations—all in a single unit. Using the hub as the input, it performs functions such as two-speed shifting and precise positioning. By cutting off power to the electromagnetic clutches and applying power to the electromagnetic brake, it brakes the output shaft.

[Specifications]

Model	Size	Dynamic friction torque Td [N·m]	Static friction torque Ts [N·m]	Coil (at 20°C)				Temperature Class	Maximum rotational speed [^rpm]	Rotating mass moment of inertia J [kg·m²]	Total work until air gap readjustment ET [J]	Armature pull-in time ta [s]	Torque rise time tp [s]	Torque decay time td [s]	Mass [kg]
Model	Size	Dynamic friction torque Td [N·m]	Static friction torque Ts [N·m]	Voltage [V]	Power [W]	Current [A]	Resistance [Ω]	Temperature Class	Maximum rotational speed [^rpm]	Rotating mass moment of inertia J [kg·m²]	Total work until air gap readjustment ET [J]	Armature pull-in time ta [s]	Torque rise time tp [s]	Torque decay time td [s]	Mass [kg]
122-06-20G	06	5	5.5	DC24	11	0.46	52	B	3000	2.19×10⁻⁴	36×10⁶	C: 0.020 / B: 0.015	C: 0.041 / B: 0.033	C:0.020 / B:0.015	4
122-08-20G	08	10	11	DC24	15	0.63	38	B	3000	6.55×10⁻⁴	60×10^⁶	C: 0.023 / B: 0.016	C: 0.051 / B: 0.042	C:0.030 / B:0.025	6
122-10-20G	10	20	22	DC24	20	0.83	29	B	3000	2.12×10⁻³	130×10^⁶	C: 0.025 / B: 0.018	C: 0.063 / B: 0.056	C:0.050 / B:0.030	9
122-12-20G	12	40	45	DC24	25	1.04	23	B	3000	6.35×10⁻³	250×10⁶	C: 0.040 / B: 0.027	C: 0.115 / B: 0.090	C:0.065 / B:0.050	17
122-16-20G	16	80	90	DC24	35	1.46	16	B	3000	1.99×10⁻²	470×10^⁶	C: 0.050 / B: 0.035	C: 0.160 / B: 0.127	C:0.085 / B:0.055	29
122-20-20G	20	160	175	DC24	45	1.88	13	B	2500	6.15×10⁻²	10×10⁸	C: 0.090 / B: 0.065	C: 0.250 / B: 0.200	C:0.130 / B:0.070	58

The dynamic friction torque Td is the value at a relative speed of 100 min⁻¹. Additionally, depending on the initial torque characteristics, a break-in period may be required.

[Dimensions]

三木プーリのダブルクラッチ・ブレーキユニット122モデル寸法図外形寸法および取付寸法を示す寸法図

Size	Unit Dimensions
Size	A1	A2	B1	B2	C	D	E	F	G	H	J1	J2	K	L	M	N	Z1	Z2
06	65	90	90	105	65	100	27.5	61	2.6	115	73	48	142	211	47	33	13.5	6.5
08	80	110	110	130	80	125	32.5	72	3.2	142.5	83	53	162	246	57	37	15.5	9
10	105	135	140	160	90	150	35	81	3.2	165	100	59	190	294	72	47	20	11.5
12	135	160	175	185	112	190	42.5	97	4.5	207	124	74	222	358	93	52	24.5	11.5
16	155	200	200	230	132	230	45	109	6	247	150.5	89.5	272	440	114.5	62	28	14
20	195	240	240	270	160	290	47.5	124	20	305	197	114	348	551	143	74.5	28	14

Size	Shaft Dimensions											CAD File No.
Size	Q1	Q2	S1	S2	U1	U2	V1	V2	X1	X2	W1,2
06	25	20	11	38	12.5	39.5	M4×0.7, depth 8	3-M4×0.7 depth 4	3-120°	60°	4	122-201
08	30	25	14	45	16	47	M4×0.7, depth 8	3-M4×0.7 depth 6	3-120°	60°	5	122-202
10	40	30	19	55	21	57	M6×1, depth 11	4-M4×0.7 depth 8	4-90°	45°	5	122-203
12	50	40	24	64	27	67	M6×1, depth 11	4-M4×0.7, depth 8	4-90°	45°	7	122-204
16	60	50	28	75	31	78	M6×1, depth 11	6-M5×0.8 depth 8	6-60°	30°	7	122-205
20	80	60	38	90	41.5	93.5	M10×1.5, depth 17	4 x M6 x 1, depth 12	4-90°	45°	10	12 2-206

The output keyway complies with the old JIS Type 2 standard, while the key complies with the old JIS Type 1 standard. Please note that the keyway dimensions for the unit hub section do not conform to JIS standards. Please refer to the dimension table above.
When inserting pulleys or similar components into the output shaft, please use the included insertion set.
The base of the 122-20-20G is made of cast metal.

三木プーリの122モデルダブルクラッチ・ブレーキユニットご注文時の型式構成説明図