121(10G) Types （Double clutches）

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121(10G) Types （Double clutches） Specifications

121 (10G) Types

[Specifications]

Model	Size	Dynamic friction torque Td ［N・m］	Static friction torque Ts ［N・m］	Coil (at 20℃)	Heat resistance class	Max. rotation speed ［min^-1］	Rotating part moment of inertia J ［kg・m²］	Total work performed until readjustment of the air gap ET ［J］	Armature pull-in time ta ［s］	Torque build-up time tp ［s］	Torque decaying time td ［s］	Mass ［kg］
Voltage ［V］	Wattage ［W］	Current ［A］	Resistance ［Ω］	For hub input	For shaft input
121-06-10G	06	5	5.5	DC24	11	0.46	52	B	3000	1.55×10^-4	1.05×10^-4	36×106	C: 0.020/B: 0.015	C: 0.041/B: 0.033	C: 0.020/B: 0.015	1.7
121-08-10G	08	10	11	DC24	15	0.63	38	B	3000	4.75×10^-4	3.00×10^-4	60×106	C: 0.023/B: 0.016	C: 0.051/B: 0.042	C: 0.030/B: 0.025	3.1
121-10-10G	10	20	22	DC24	20	0.83	29	B	3000	1.44×10^-3	9.45×10^-4	130×106	C: 0.025/B: 0.018	C: 0.063/B: 0.056	C: 0.050/B: 0.030	6.5
121-12-10G	12	40	45	DC24	25	1.04	23	B	3000	4.50×10^-3	2.75×10^-3	250×106	C: 0.040/B: 0.027	C: 0.115/B: 0.090	C: 0.065/B: 0.050	10.5
121-16-10G	16	80	90	DC24	35	1.46	16	B	3000	1.34×10^-2	9.05×10^-3	470×106	C: 0.050/B: 0.035	C: 0.160/B: 0.127	C: 0.085/B: 0.055	21
121-20-10G	20	160	175	DC24	45	1.88	13	B	2500	4.18×10^-2	2.65×10^-2	10×108	C: 0.090/B: 0.065	C: 0.250/B: 0.200	C: 0.130/B: 0.070	38.5
121-25-10G	25	320	350	DC24	60	2.50	9.6	B	2000	9.80×10^-2	7.45×10^-2	20×108	C: 0.115/B: 0.085	C: 0.335/B: 0.275	C: 0.210/B: 0.125	70

Model

Size

Dynamic friction torque Td ［N・m］

Static friction torque Ts ［N・m］

Coil (at 20℃)

Heat resistance class

Max. rotation speed ［min^-1］

Rotating part moment of inertia J ［kg・m²］

Total work performed until readjustment of the air gap ET ［J］

Armature pull-in time ta ［s］

Torque build-up time tp ［s］

Torque decaying time td ［s］

Mass ［kg］

Voltage ［V］

Wattage ［W］

Current ［A］

Resistance ［Ω］

For hub input

For shaft input

121-06-10G

5.5

DC24

0.46

3000

1.55×10^-4

1.05×10^-4

36×106

C: 0.020/B: 0.015

C: 0.041/B: 0.033

C: 0.020/B: 0.015

1.7

121-08-10G

DC24

0.63

3000

4.75×10^-4

3.00×10^-4

60×106

C: 0.023/B: 0.016

C: 0.051/B: 0.042

C: 0.030/B: 0.025

3.1

121-10-10G

DC24

0.83

3000

1.44×10^-3

9.45×10^-4

130×106

C: 0.025/B: 0.018

C: 0.063/B: 0.056

C: 0.050/B: 0.030

6.5

121-12-10G

DC24

1.04

3000

4.50×10^-3

2.75×10^-3

250×106

C: 0.040/B: 0.027

C: 0.115/B: 0.090

C: 0.065/B: 0.050

10.5

121-16-10G

DC24

1.46

3000

1.34×10^-2

9.05×10^-3

470×106

C: 0.050/B: 0.035

C: 0.160/B: 0.127

C: 0.085/B: 0.055

121-20-10G

160

175

DC24

1.88

2500

4.18×10^-2

2.65×10^-2

10×108

C: 0.090/B: 0.065

C: 0.250/B: 0.200

C: 0.130/B: 0.070

38.5

121-25-10G

320

350

DC24

2.50

9.6

2000

9.80×10^-2

7.45×10^-2

20×108

C: 0.115/B: 0.085

C: 0.335/B: 0.275

C: 0.210/B: 0.125

*The dynamic friction torque, Td, is measured at a relative speed of 100 min-1. Depending on the initial torque characteristics, break-in to condition the engaging surfaces may also be required.

*The rotating part moment of inertia for shaft input is the value with one armature type-5.

[Dimensions]

Size	Dimensions of part
A1	A2	B1	B2	C	D	E	F	G	H	J1	J2	K	L	M	N	Z1	Z2
06	52.5	75	80	90	55	80	27.5	53	2.6	95	65.5	40.5	111.5	181	47	33	13.5	6.5
08	65	90	90	105	65	100	27.5	61	2.6	115	78.5	48.5	133	217	57	37	13.5	6.5
10	80	110	110	130	80	125	32.5	72	3.2	142.5	98	58	162	266	72	47	15.5	9
12	105	135	140	160	90	150	35	81	3.2	165	121	71	193	327	92	52	20	11.5
16	135	160	175	185	112	190	42.5	97	4.5	207	149	87.5	232	397	113	62	24.5	11.5
20	155	200	200	230	132	230	45	109	6	247	187	105	290	492	142	74.5	28	14
25	195	240	240	270	160	290	47.5	124	20	305	238	125	350	603	183	101.5	28	14

Size

Dimensions of part

52.5

27.5

2.6

65.5

40.5

111.5

181

13.5

6.5

105

100

27.5

2.6

115

78.5

48.5

133

217

13.5

6.5

110

130

125

32.5

3.2

142.5

162

266

15.5

105

135

140

160

150

3.2

165

121

193

327

11.5

135

160

175

185

112

190

42.5

4.5

207

149

87.5

232

397

113

24.5

11.5

155

200

230

132

230

109

247

187

105

290

492

142

74.5

195

240

270

160

290

47.5

124

305

238

125

350

603

183

101.5

Size	Shaft dimensions
Q1	Q2	S1	S2	U1	U2	V1	V2	X1	X2	W1, 2
06	25	20	11	38	12.5	39.5	M4×0.7, length: 8	3-M4×0.7, length: 4	3° to 120°	60°	4
08	30	25	14	45	16	47	M4×0.7, length: 8	3-M4×0.7, length: 6	3° to 120°	60°	5
10	40	30	19	55	21	57	M6×1, length: 11	4-M4×0.7, length: 8	4° to 90°	45°	5
12	50	40	24	64	27	67	M6×1, length: 11	4-M4×0.7, length: 8	4° to 90°	45°	7
16	60	50	28	75	31	78	M6×1, length: 11	6-M5×0.8, length: 8	6° to 60°	30°	7
20	80	60	38	90	41.5	93.5	M10×1.5, length: 17	4-M6×1, length: 12	4° to 90°	45°	10
25	110	70	42	115	45.5	118.5	M10×1.5, length: 17	8-M6×1, length: 12	8° to 45°	22.5°	12

Size

Shaft dimensions

W1, 2

12.5

39.5

M4×0.7, length: 8

3-M4×0.7, length: 4

3° to 120°

60°

M4×0.7, length: 8

3-M4×0.7, length: 6

3° to 120°

60°

M6×1, length: 11

4-M4×0.7, length: 8

4° to 90°

45°

M6×1, length: 11

4-M4×0.7, length: 8

4° to 90°

45°

M6×1, length: 11

6-M5×0.8, length: 8

6° to 60°

30°

41.5

93.5

M10×1.5, length: 17

4-M6×1, length: 12

4° to 90°

45°

110

115

45.5

118.5

M10×1.5, length: 17

8-M6×1, length: 12

8° to 45°

22.5°

*The input/output keyways are old JIS standard class 2 while the key is old JIS standard class 1. Note that the keyway dimensions of the unit hub part do not conform to JIS standards. Check them on the dimensions table above.

*When inserting pulleys or the like onto input/output shafts, use the supplied insertion set.

*The 121-25-10G base is a casting.

121(10G) Types （Double clutches）

Features of 121(10G) Types （Double clutches）

121(10G) Types （Double clutches） Specifications

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