Gearhead

Namiki's high efficiency / low noise gear was made possible by the company's high precision processing technology nurtured in watch parts making.

Spur gearhead

  1. base-plate
  2. kana (drive sprocket)
  3. guide
  4. spur (driven sprocket)
  5. bearing
  6. output shaft
  • Most popular gearhead
  • Gear shaft is aligned in parallel with the output shaft
  • No thrust force is generated
  • Rotating direction may differ between input shaft and output shaft depending on the stages.

Spur gear: Gear train using spur wheel, relatively simple structured with fewer number of parts, advantage is less mechanical noise.

Planetary gearhead

  1. base-plate
  2. planetary gear
  3. career plate
  4. internal gear
  5. bearing
  6. output shaft
  • Large reduction ratio can be achieved
  • Considerable torque transmission
  • Input shaft (motor shaft) and output shaft (gear shaft) are aligned in one straight line.
  • Torque is distributed evenly to each planetary gear, so the gear is relatively strong in durability.

Planetary gear: It is called a planetary gear because it orbits around the sun gear. Due to large number of teeth, it is suited for high torque transfer.

* Gear head is sellable only in combination with motor.

By attaching a reduction gear mechanism on the motor output shaft, it can generate high torque/low speed, which motor alone cannot achieve.
Compact motors usually feature high speed, but this speed can be reduced to requested level by combining with a gear head.
Because torque increases in proportion to gear ratio, high torque can be easily achieved even in a compact motor.
While a gear head can help generate high torque, it may influence durability and characteristics failure depending on its accuracy.
Using the precision processing technology nurtured in diamond processing/watch part processing, Namiki manufactures and delivers low noise, high efficiency precision gear heads.

Spur Gear

Dia.φ
[mm]
Products Reduction
Ratio
(absolute
value)
Number of stage Allowable Torque Efficiency
[%]
Length
[m]
Weight
[g]
Rotation
direction
Motor
Conbination
Continous
[mNm]
Intermittent
[mNm]
10 SSG10-15 15.4:1 3 12 30 73 14 5.4 CMS10 series
BMS10 series
SSG10-29 29.25:1 4 12 30 66 16 6.2
SSG10-49 48.75:1 5 12 30 59 18 7.0
SSG10-93 93.43:1 5 12 30 59 18 7.0
SSG10-156 155.56:1 6 12 30 53 20 7.9
SSG10-200 199.64:1 6 12 30 53 20 7.9
SSG10-262 261.6:1 6 12 30 53 20 7.9
12 SSG12-16 15.78:1 3 12 30 73 14 8.3 CMS12 series
BMS12 series
SSG12-25 24.7:1 3 12 30 73 14 8.3
SSG12-47 47.35:1 4 15 30 66 16 9.2
SSG12-74 74.1:1 4 15 30 66 16 9.2
SSG12-94 93.86:1 4 15 30 66 16 9.2
SSG12-176 175.5:1 5 15 30 59 18 10.2
SSG12-222 222.3:1 5 15 30 59 18 10.2
SSG12-282 281.58 5 15 30 59 18 10.2
15 SSG15-29 29.07:1 3 15 30 73 9.6 8.9 CMS16 series
BMS16 series
SSG15-49 48.58:1 4 24 60 66 11.6 10.3
SSG15-71 71.35:1 4 24 60 66 11.6 10.3
SSG15-94 93.68:1 4 24 60 66 11.6 10.3
SSG15-152 152.2:1 5 24 60 59 13.6 10.3
SSG15-198 198.06:1 5 24 60 59 13.6 11.5
SSG15-302 301.84:1 5 24 60 59 13.6 10.3
SSG15-438 438.31:1 6 24 60 53 15.6 12.9
SSG15-638 638.18:1 6 24 60 53 15.6 12.9
SSG10-15
Dia.[mm]
10
Reduction Ratio (absolute)
15.4:1
Number of stage
3
Allowable Torque:Continous [mNm]
12
Allowable Torque:Intermittent [mNm]
30
Efficiency [%]
73
Length [m]
14
Weight [g]
5.4
Rotation direction
Motor Combination
CMS10 series
BMS10 series
SSG10-29
Dia.[mm]
10
Reduction Ratio (absolute)
29.25:1
Number of stage
4
Allowable Torque:Continous [mNm]
12
Allowable Torque:Intermittent [mNm]
30
Efficiency [%]
66
Length [m]
16
Weight [g]
6.2
Rotation direction
Motor Combination
CMS10 series
BMS10 series
SSG10-49
Dia.[mm]
10
Reduction Ratio (absolute)
48.75:1
Number of stage
5
Allowable Torque:Continous [mNm]
12
Allowable Torque:Intermittent [mNm]
30
Efficiency [%]
59
Length [m]
18
Weight [g]
7.0
Rotation direction
Motor Combination
CMS10 series
BMS10 series
SSG10-93
Dia.[mm]
10
Reduction Ratio (absolute)
93.43:1
Number of stage
5
Allowable Torque:Continous [mNm]
12
Allowable Torque:Intermittent [mNm]
30
Efficiency [%]
59
Length [m]
18
Weight [g]
7.0
Rotation direction
Motor Combination
CMS10 series
BMS10 series
SSG10-156
Dia.[mm]
10
Reduction Ratio (absolute)
155.56:1
Number of stage
6
Allowable Torque:Continous [mNm]
12
Allowable Torque:Intermittent [mNm]
30
Efficiency [%]
53
Length [m]
20
Weight [g]
7.9
Rotation direction
Motor Combination
CMS10 series
BMS10 series
SSG10-200
Dia.[mm]
10
Reduction Ratio (absolute)
199.64:1
Number of stage
6
Allowable Torque:Continous [mNm]
12
Allowable Torque:Intermittent [mNm]
30
Efficiency [%]
53
Length [m]
20
Weight [g]
7.9
Rotation direction
Motor Combination
CMS10 series
BMS10 series
SSG10-262
Dia.[mm]
10
Reduction Ratio (absolute)
261.6:1
Number of stage
6
Allowable Torque:Continous [mNm]
12
Allowable Torque:Intermittent [mNm]
30
Efficiency [%]
53
Length [m]
20
Weight [g]
7.9
Rotation direction
Motor Combination
CMS10 series
BMS10 series
SSG12-16
Dia.[mm]
12
Reduction Ratio (absolute)
15.78:1
Number of stage
3
Allowable Torque:Continous [mNm]
12
Allowable Torque:Intermittent [mNm]
30
Efficiency [%]
73
Length [m]
14
Weight [g]
8.3
Rotation direction
Motor Combination
CMS12 series
BMS12 series
SSG12-25
Dia.[mm]
12
Reduction Ratio (absolute)
24.7:1
Number of stage
3
Allowable Torque:Continous [mNm]
12
Allowable Torque:Intermittent [mNm]
30
Efficiency [%]
73
Length [m]
14
Weight [g]
8.3
Rotation direction
Motor Combination
CMS12 series
BMS12 series
SSG12-47
Dia.[mm]
12
Reduction Ratio (absolute)
47.35:1
Number of stage
4
Allowable Torque:Continous [mNm]
15
Allowable Torque:Intermittent [mNm]
30
Efficiency [%]
66
Length [m]
16
Weight [g]
9.2
Rotation direction
Motor Combination
CMS12 series
BMS12 series
SSG12-74
Dia.[mm]
12
Reduction Ratio (absolute)
74.1:1
Number of stage
4
Allowable Torque:Continous [mNm]
15
Allowable Torque:Intermittent [mNm]
30
Efficiency [%]
66
Length [m]
16
Weight [g]
9.2
Rotation direction
Motor Combination
CMS12 series
BMS12 series
SSG12-94
Dia.[mm]
12
Reduction Ratio (absolute)
93.86:1
Number of stage
4
Allowable Torque:Continous [mNm]
15
Allowable Torque:Intermittent [mNm]
30
Efficiency [%]
66
Length [m]
16
Weight [g]
9.2
Rotation direction
Motor Combination
CMS12 series
BMS12 series
SSG12-176
Dia.[mm]
12
Reduction Ratio (absolute)
175.5:1
Number of stage
5
Allowable Torque:Continous [mNm]
15
Allowable Torque:Intermittent [mNm]
30
Efficiency [%]
59
Length [m]
18
Weight [g]
10.2
Rotation direction
Motor Combination
CMS12 series
BMS12 series
SSG12-222
Dia.[mm]
12
Reduction Ratio (absolute)
222.3:1
Number of stage
5
Allowable Torque:Continous [mNm]
15
Allowable Torque:Intermittent [mNm]
30
Efficiency [%]
59
Length [m]
18
Weight [g]
10.2
Rotation direction
Motor Combination
CMS12 series
BMS12 series
SSG12-282
Dia.[mm]
12
Reduction Ratio (absolute)
281.58
Number of stage
5
Allowable Torque:Continous [mNm]
15
Allowable Torque:Intermittent [mNm]
30
Efficiency [%]
59
Length [m]
18
Weight [g]
10.2
Rotation direction
Motor Combination
CMS12 series
BMS12 series
SSG15-29
Dia.[mm]
15
Reduction Ratio (absolute)
29.07:1
Number of stage
3
Allowable Torque:Continous [mNm]
15
Allowable Torque:Intermittent [mNm]
30
Efficiency [%]
73
Length [m]
9.6
Weight [g]
8.9
Rotation direction
Motor Combination
CMS16 series
BMS16 series
SSG15-49
Dia.[mm]
15
Reduction Ratio (absolute)
48.58:1
Number of stage
4
Allowable Torque:Continous [mNm]
24
Allowable Torque:Intermittent [mNm]
60
Efficiency [%]
66
Length [m]
11.6
Weight [g]
10.3
Rotation direction
Motor Combination
CMS16 series
BMS16 series
SSG15-71
Dia.[mm]
15
Reduction Ratio (absolute)
71.35:1
Number of stage
4
Allowable Torque:Continous [mNm]
24
Allowable Torque:Intermittent [mNm]
60
Efficiency [%]
66
Length [m]
11.6
Weight [g]
10.3
Rotation direction
Motor Combination
CMS16 series
BMS16 series
SSG15-94
Dia.[mm]
15
Reduction Ratio (absolute)
93.68:1
Number of stage
4
Allowable Torque:Continous [mNm]
24
Allowable Torque:Intermittent [mNm]
60
Efficiency [%]
66
Length [m]
11.6
Weight [g]
10.3
Rotation direction
Motor Combination
CMS16 series
BMS16 series
SSG15-152
Dia.[mm]
15
Reduction Ratio (absolute)
152.2:1
Number of stage
5
Allowable Torque:Continous [mNm]
24
Allowable Torque:Intermittent [mNm]
60
Efficiency [%]
59
Length [m]
13.6
Weight [g]
11.5
Rotation direction
Motor Combination
CMS16 series
BMS16 series
SSG15-198
Dia.[mm]
15
Reduction Ratio (absolute)
198.06:1
Number of stage
5
Allowable Torque:Continous [mNm]
24
Allowable Torque:Intermittent [mNm]
60
Efficiency [%]
59
Length [m]
13.6
Weight [g]
11.5
Rotation direction
Motor Combination
CMS16 series
BMS16 series
SSG15-302
Dia.[mm]
15
Reduction Ratio (absolute)
301.84:1
Number of stage
5
Allowable Torque:Continous [mNm]
24
Allowable Torque:Intermittent [mNm]
60
Efficiency [%]
59
Length [m]
13.6
Weight [g]
11.5
Rotation direction
Motor Combination
CMS16 series
BMS16 series
SSG15-438
Dia.[mm]
15
Reduction Ratio (absolute)
438.31:1
Number of stage
6
Allowable Torque:Continous [mNm]
24
Allowable Torque:Intermittent [mNm]
60
Efficiency [%]
53
Length [m]
15.6
Weight [g]
12.9
Rotation direction
Motor Combination
CMS16 series
BMS16 series
SSG15-638
Dia.[mm]
15
Reduction Ratio (absolute)
638.18:1
Number of stage
6
Allowable Torque:Continous [mNm]
24
Allowable Torque:Intermittent [mNm]
60
Efficiency [%]
53
Length [m]
15.6
Weight [g]
12.9
Rotation direction
Motor Combination
CMS16 series
BMS16 series

Written in RED LETTERS are non-standard gears. For further support, please inquire our sales representatives accordingly.

Planetary Gear

Dia.φ
[mm]
Products Reduction
Ratio
(absolute
value)
Number of stage Length
[m]
Weight
[g]
Rotation
direction
Motor
Conbination
7 SPG07-4.7 4.71:1 1 7.4 2.0 CMS07 series
BMS07 series
SPG07-22 22.22:1 2 9.6 2.5
SPG07-105 104.77:1 3 11.8 3.0
SPG07-494 493.93:1 4 14.1 3.5
10 SPG10-3.6 3.6:1 1 10.5 5.8 CMS10 series
BMS10 series
SPG10-4.7 4.7:1 1 10.5 5.8
SPG10-13 12.96:1 2 13.5 7.1
SPG10-22 22.22:1 2 13.5 7.1
SPG10-47 46.66:1 3 16.5 8.4
SPG10-61 61.1:1 3 16.5 8.4
SPG10-80 80.01:1 3 16.5 8.4
SPG10-105 104.77:1 3 16.5 8.4
SPG10-168 167.96:1 4 19.6 9.7
SPG10-220 219.95:1 4 19.6 9.7
SPG10-288 288.03:1 4 19.6 9.7
SPG10-377 377.18:1 4 19.6 9.7
SPG10-493 493.93:1 4 19.6 9.7
12 SPG12-3.5 3.5:1 1 14.2 11.6 CMS12 series
BMS12 series
SPG12-4.8 4.8:1 1 14.2 11.6
SPG12-12 12.25:1 2 18.0 14.1
SPG12-23 22.56:1 2 18.0 14.1
SPG12-43 22.56:1 2 18.0 16.6
SPG12-58 42.88:1 3 21.8 16.6
SPG12-79 42.88:1 3 21.8 16.6
SPG12-107 107.17:1 3 21.8 16.6
SPG12-150 107.17:1 3 21.8 19.1
SPG12-204 107.17:1 3 21.8 19.1
SPG12-375 107.17:1 3 21.8 19.1
SPG12-509 509.07:1 4 25.7 20
16 SPG16-3.6 3.6:1 1 15.3 20 CMS16 series
BMS16 series
SPG16-4.7 4.71:1 1 15.3 20
SPG16-13 12.96:1 2 19.5 24.5
SPG16-22 22.22:1 2 19.5 24.5
SPG16-46 46.66:1 3 19.5 29
SPG16-61 61.1:1 3 23.7 29
SPG16-80 80.01:1 3 23.7 29
SPG16-105 104.7:1 3 23.7 29
SPG16-168 167.96:1 4 28 33.5
SPG16-220 219.95:1 4 28 33.5
SPG16-288 288.03:1 4 28 33.5
SPG16-377 377.18:1 4 28 33.5
SPG16-493 493.93:1 4 28 33.5
SPG07-4.7
Dia.[mm]
7
Reduction Ratio (absolute)
4.71:1
Number of stage
1
Length [m]
7.4
Weight [g]
2
Rotation direction
Motor Combination
CMS07 series
BMS07 series
SPG07-22
Dia.[mm]
7
Reduction Ratio (absolute)
22.22:1
Number of stage
2
Length [m]
9.6
Weight [g]
2.5
Rotation direction
Motor Combination
CMS07 series
BMS07 series
SPG07-105
Dia.[mm]
7
Reduction Ratio (absolute)
104.77:1
Number of stage
3
Length [m]
11.8
Weight [g]
3
Rotation direction
Motor Combination
CMS07 series
BMS07 series
SPG07-494
Dia.[mm]
7
Reduction Ratio (absolute)
493.93:1
Number of stage
4
Length [m]
14.1
Weight [g]
3.5
Rotation direction
Motor Combination
CMS07 series
BMS07 series
SPG10-3.6
Dia.[mm]
10
Reduction Ratio (absolute)
1 / 3.60
Number of stage
1
Allowable Torque:Continous [mNm]
50
Allowable Torque:Intermittent [mNm]
100
Efficiency [%]
85
Length [m]
10.50
Weight [g]
5.8
Rotation direction
Motor Combination
CMS10 series
BMS10 series
SPG10-4.7
Dia.[mm]
10
Reduction Ratio (absolute)
4.7:1
Number of stage
1
Length [m]
10.5
Weight [g]
7.1
Rotation direction
Motor Combination
CMS10 series
BMS10 series
SPG10-13
Dia.[mm]
10
Reduction Ratio (absolute)
12.96:1
Number of stage
2
Length [m]
13.5
Weight [g]
7.1
Rotation direction
Motor Combination
CMS10 series
BMS10 series
SPG10-22
Dia.[mm]
10
Reduction Ratio (absolute)
22.22:1
Number of stage
2
Length [m]
13.5
Weight [g]
8.4
Rotation direction
Motor Combination
CMS10 series
BMS10 series
SPG10-47
Dia.[mm]
10
Reduction Ratio (absolute)
46.66:1
Number of stage
3
Length [m]
16.5
Weight [g]
8.4
Rotation direction
Motor Combination
CMS10 series
BMS10 series
SPG10-61
Dia.[mm]
10
Reduction Ratio (absolute)
61.1:1
Number of stage
3
Length [m]
16.5
Weight [g]
8.4
Rotation direction
Motor Combination
CMS10 series
BMS10 series
SPG10-80
Dia.[mm]
10
Reduction Ratio (absolute)
80.01:1
Number of stage
3
Length [m]
16.5
Weight [g]
8.4
Rotation direction
Motor Combination
CMS10 series
BMS10 series
SPG10-105
Dia.[mm]
10
Reduction Ratio (absolute)
104.77:1
Number of stage
3
Length [m]
16.5
Weight [g]
8.4
Rotation direction
Motor Combination
CMS10 series
BMS10 series
SPG10-168
Dia.[mm]
10
Reduction Ratio (absolute)
167.96:1
Number of stage
4
Length [m]
19.6
Weight [g]
9.7
Rotation direction
Motor Combination
CMS10 series
BMS10 series
SPG10-220
Dia.[mm]
10
Reduction Ratio (absolute)
219.95:1
Number of stage
4
Length [m]
19.6
Weight [g]
9.7
Rotation direction
Motor Combination
CMS10 series
BMS10 series
SPG10-288
Dia.[mm]
10
Reduction Ratio (absolute)
288.03:1
Number of stage
4
Length [m]
19.6
Weight [g]
9.7
Rotation direction
Motor Combination
CMS10 series
BMS10 series
SPG10-377
Dia.[mm]
10
Reduction Ratio (absolute)
377.18:1
Number of stage
4
Length [m]
19.6
Weight [g]
9.7
Rotation direction
Motor Combination
CMS10 series
BMS10 series
SPG10-493
Dia.[mm]
10
Reduction Ratio (absolute)
1 / 493.93
Number of stage
4
Length [m]
19.6
Weight [g]
9.7
Rotation direction
Motor Combination
CMS10 series
BMS10 series
SPG12-3.5
Dia.[mm]
12
Reduction Ratio (absolute)
3.5:1
Number of stage
1
Length [m]
14.2
Weight [g]
11.6
Rotation direction
Motor Combination
CMS12 series
BMS12 series
SPG12-4.8
Dia.[mm]
12
Reduction Ratio (absolute)
4.8:1
Number of stage
1
Length [m]
14.2
Weight [g]
11.6
Rotation direction
Motor Combination
CMS12 series
BMS12 series
SPG12-12
Dia.[mm]
12
Reduction Ratio (absolute)
12.25:1
Number of stage
2
Length [m]
18
Weight [g]
14.1
Rotation direction
Motor Combination
CMS12 series
BMS12 series
SPG12-23
Dia.[mm]
12
Reduction Ratio (absolute)
22.56:1
Number of stage
2
Length [m]
18
Weight [g]
14.1
Rotation direction
Motor Combination
CMS12 series
BMS12 series
SPG12-43
Dia.[mm]
12
Reduction Ratio (absolute)
42.88:1
Number of stage
3
Length [m]
21.8
Weight [g]
16.6
Rotation direction
Motor Combination
CMS12 series
BMS12 series
SPG12-58
Dia.[mm]
12
Reduction Ratio (absolute)
58.19:1
Number of stage
3
Length [m]
21.8
Weight [g]
16.6
Rotation direction
Motor Combination
CMS12 series
BMS12 series
SPG12-79
Dia.[mm]
12
Reduction Ratio (absolute)
78.97:1
Number of stage
3
Length [m]
21.8
Weight [g]
16.6
Rotation direction
Motor Combination
CMS12 series
BMS12 series
SPG12-107
Dia.[mm]
12
Reduction Ratio (absolute)
107.17:1
Number of stage
3
Length [m]
21.8
Weight [g]
16.6
Rotation direction
Motor Combination
CMS12 series
BMS12 series
SPG12-150
Dia.[mm]
12
Reduction Ratio (absolute)
150.06:1
Number of stage
4
Length [m]
25.7
Weight [g]
19.1
Rotation direction
Motor Combination
CMS12 series
BMS12 series
SPG12-204
Dia.[mm]
12
Reduction Ratio (absolute)
203.66:1
Number of stage
4
Length [m]
25.7
Weight [g]
19.1
Rotation direction
Motor Combination
CMS12 series
BMS12 series
SPG12-375
Dia.[mm]
12
Reduction Ratio (absolute)
375.1:1
Number of stage
4
Length [m]
25.7
Weight [g]
19.1
Rotation direction
Motor Combination
CMS12 series
BMS12 series
SPG12-509
Dia.[mm]
12
Reduction Ratio (absolute)
509.07:1
Number of stage
4
Length [m]
25.7
Weight [g]
19.1
Rotation direction
Motor Combination
CMS12 series
BMS12 series
SPG16-3.6
Dia.[mm]
16
Reduction Ratio (absolute)
3.6:1
Number of stage
1
Length [m]
15.3
Weight [g]
20
Rotation direction
Motor Combination
CMS16 series
BMS16 series
SPG16-4.7
Dia.[mm]
16
Reduction Ratio (absolute)
4.71:1
Number of stage
1
Length [m]
15.3
Weight [g]
20
Rotation direction
Motor Combination
CMS16 series
BMS16 series
SPG16-13
Dia.[mm]
16
Reduction Ratio (absolute)
12.96:1
Number of stage
2
Length [m]
19.5
Weight [g]
24.5
Rotation direction
Motor Combination
CMS16 series
BMS16 series
SPG16-22
Dia.[mm]
16
Reduction Ratio (absolute)
22.22:1
Number of stage
2
Length [m]
19.5
Weight [g]
24.5
Rotation direction
Motor Combination
CMS16 series
BMS16 series
SPG16-46
Dia.[mm]
16
Reduction Ratio (absolute)
46.66:1
Number of stage
3
Length [m]
23.7
Weight [g]
29
Rotation direction
Motor Combination
CMS16 series
BMS16 series
SPG16-61
Dia.[mm]
16
Reduction Ratio (absolute)
61.1:1
Number of stage
3
Length [m]
23.7
Weight [g]
29
Rotation direction
Motor Combination
CMS16 series
BMS16 series
SPG16-80
Dia.[mm]
16
Reduction Ratio (absolute)
80.01:1
Number of stage
3
Length [m]
23.7
Weight [g]
29
Rotation direction
Motor Combination
CMS16 series
BMS16 series
SPG16-105
Dia.[mm]
16
Reduction Ratio (absolute)
1 / 104.7
Number of stage
3
Length [m]
23.7
Weight [g]
16.4
Rotation direction
Motor Combination
CMS16 series
BMS16 series
SPG16-168
Dia.[mm]
16
Reduction Ratio (absolute)
167.96:1
Number of stage
4
Length [m]
28
Weight [g]
33.5
Rotation direction
Motor Combination
CMS16 series
BMS16 series
SPG16-220
Dia.[mm]
16
Reduction Ratio (absolute)
219.95:1
Number of stage
4
Length [m]
28
Weight [g]
33.5
Rotation direction
Motor Combination
CMS16 series
BMS16 series
SPG16-288
Dia.[mm]
16
Reduction Ratio (absolute)
288.03:1
Number of stage
4
Length [m]
28
Weight [g]
33.5
Rotation direction
Motor Combination
CMS16 series
BMS16 series
SPG16-377
Dia.[mm]
16
Reduction Ratio (absolute)
377.18:1
Number of stage
4
Length [m]
28
Weight [g]
33.5
Rotation direction
Motor Combination
CMS16 series
BMS16 series
SPG16-493
Dia.[mm]
16
Reduction Ratio (absolute)
493.93:1
Number of stage
4
Length [m]
28
Weight [g]
33.5
Rotation direction
Motor Combination
CMS16 series
BMS16 series

Written in RED LETTERS are non-standard gears. For further support, please inquire our sales representatives accordingly.

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