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GCSG Series
Diverse appearance; suitable for robot arm. Short axial dimension. High rigidity for stable precision work. More compact and higher accurate. Applied in robot industry, especially for multi-axis robot joints. Servormotor gearbox.
Key Points
- Diverse appearance; suitable for robot arm.
- Short axial dimension.
- High rigidity for stable precision work.
- More compact and higher accurate.
- Applied in robot industry, especially for multi-axis robot joints.
- Servormotor gearbox.
Related Entities
Harmonic Gearing - GCSG Series
Product Description
- Diverse appearance; suitable for robot arm.
- Short axial dimension.
- High rigidity for stable precision work.
- More compact and higher accurate.
- Applied in robot industry, especially for multi-axis robot joints.
- Servormotor gearbox.
Specification
| Model / Specification | Reduction Ratio | GCSG17 | GCSG20 | GCSG25 | GCSG32 | GCSG40 |
|---|---|---|---|---|---|---|
| Rated Output Torque Nm | 50 | 20.58 | 32.4 | 50.96 | 98 | 176.4 |
| 80 | 28.42 | 44.1 | 82.32 | 156.8 | 264.6 | |
| 100 | 31.36 | 51.94 | 87.22 | 176.4 | 343 | |
| 120 | 31.36 | 51.94 | 87.22 | 176.4 | 382.2 | |
| 160 | - | 51.94 | 87.22 | 176.4 | 382.2 | |
| Max. Output Torque Nm | 50~160 | 3x continuous output torque | ||||
| Emergency Stop Torque Nm | 50~160 | 5x continuous output torque | ||||
| Allowable Input Speed rpm | 50~160 | 3500 | 3500 | 3500 | 3500 | 3000 |
| Max. Torsional Moment Nm | 50~160 | 50.27 | 65.75 | 134.26 | 269.3 | 366.3 |
| Max. Radial Force N | 50~160 | 2631 | 2626 | 4331 | 6732 | 7634 |
| Max. Axial Force N | 50~160 | 1180 | 1313 | 2165 | 3366 | 3817 |
| Rated Life H | 50~160 | >10,000 | ||||
| Operating Temp. Range ℃ | 50~160 | Ambient -10°C~110°C / Max. working temp. 130°C | ||||
| Noise Level dB(A) | 50~160 | 52 | 53 | 55 | 60 | 63 |
| Lubricantion | 50~160 | 4B No.2 | ||||
| Protection Level | 50~160 | IP54 | ||||
| Reducer Inertia Kg*cm2 | 50~160 | 0.079 | 0.193 | 0.413 | 1.69 | 4.5 |
| Inertia Kgf-m/arc-min | 50~160 | 0.4 | 0.67 | 1.3 | 2.9 | 5.3 |
| Weight Kg | 50~160 | 0.8 | 1.3 | 2 | 3.5 | 6 |
| No-Load Torque Nm | 50~160 | 0.09 | 0.2 | 0.31 | 0.56 | 1.26 |
| Backlash arcsec | 50 | 20 | 17 | 17 | 14 | 14 |
| 80 | 13 | 11 | 11 | 9 | 9 | |
| 100 | 10 | 9 | 9 | 7 | 7 | |
| 120 | 8 | 8 | 8 | 6 | 6 | |
| 160 | - | 6 | 6 | 5 | - | |
Applications
Where this product is typically used.
Robot Arm
Designed for robotic arm rotary joints and high-frequency servo transmission systems that need accuracy, repeatability, and stable motion.
Dimensional Specifications
GCSG clamping type

Clamping Type Dimensions
GCSG clamping type dimensional drawing. Unit: mm.
| Symbol/Model | ØA | B | E | F | L | M | N | ØOh7 | ØR1H7 | ØT |
|---|---|---|---|---|---|---|---|---|---|---|
| GCSG17 | 79 | 56 | 29 | 21.5 | 0.5 | 9 | 27 | 63 | 10 | 30 |
| GCSG20 | 93 | 59 | 28 | 24 | 0.5 | 8 | 25.5 | 72 | 14 | 30 |
| GCSG25 | 107 | 72 | 36 | 29 | 0.5 | 11 | 34 | 86 | 20 | 50 |
| GCSG32 | 138 | 89.5 | 45 | 35 | 1 | 14 | 37 | 113 | 26 | 70 |
| Symbol/Model | ØU | X | Y | Z | a | b | C | d | e | f | g | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| GCSG17 | 8 | 27 | 6 | M5*10 | 8 | 71 | 8 | Ø4.5 | 46 | 4 | M4*8 | |
| GCSG20 | 8 | 32 | 8 | M6*12 | 8 | 82 | 8 | Ø5.5 Through Mounting | Ø9*7 | 46 | 4 | M4*8 |
| GCSG25 | 14 | 42 | 8 | M8*15 | 10 | 96 | 8 | Ø5.5 Through Mounting | Ø9*11 | 70 | 4 | M5*10 |
| GCSG32 | 19 | 55 | 8 | 12 | 125 | 12 | Ø6.6 Through Mounting | Ø11*7 | 90 | 4 | M6*12 |
GCSG keyway type

Keyway Type Dimensions
GCSG keyway type dimensional drawing. Unit: mm.
| Symbol/Model | ØA | B | C | E | F | L | M | N | ØRU7 | ØT h7 | ØU h7 | V |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| GCSG17 | 79 | 45 | 39 | 29 | 8 | 0.5 | 93.5 | 21.3 | 10 | 48 | 8 | |
| GCSG20 | 93 | 45.5 | 41 | 28 | 10 | 0.5 | 9 | 21.5 | 14 | 56 | 12 | 13.8 |
| GCSG25 | 107 | 52 | 49 | 36 | 10 | 0.5 | 12 | 21.6 | 20 | 67 | 14 | 16.3 |
| GCSG32 | 138 | 62 | 60 | 45 | 12 | 1 | 15 | 23.6 | 26 | 90 | 14 | 16.3 |
| Symbol/Model | W | X | Y | Z | t | Øk | Øy | c | Ød | f | g | Øb |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| GCSG17 | - | 27 | 6 | M5*10 | 1.1 | 38 | 18 | 8 | 4.5 | 8 | 4 | 71 |
| GCSG20 | 4 | 32 | 8 | M6*12 | 1.1 | 45 | 21 | 8 | 5.5 | 8 | M5 | 82 |
| GCSG25 | 5 | 42 | 8 | M8*15 | 1.4 | 58 | 26 | 10 | 6.6 | 10 | M5 | 96 |
| GCSG32 | 5 | 55 | 8 | M10*18 | 1.4 | 78 | 26 | 12 | 6.6 | 12 | M6 | 125 |