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A precision planetary reducer is a high-accuracy, high-efficiency reduction device, with its core transmission structure comprising planetary gears, a sun gear, and an internal ring gear. Its primary functions are to reduce rotational speed, increase torque, and decrease the rotational inertia ratio of the load motor. These reducers are commonly installed on stepping motors and servo motors.
The planetary reducer represents an extension of Kean's gear technology into complete drive systems. Kean proudly introduces the KS140/180 planetary reducer, engineered with high-quality alloy steel (HRC57-60) and a helical gear design. The KS140/180 delivers high torque, low backlash, and smooth operation, all within a compact, easy-to-maintain unit. Leveraging Kean's 23 years of high-precision gear machining capabilities and experience, along with over 30 patents and advanced Gleason and ZEISS equipment, Kean ensures outstanding performance. Please refer to the parameter tables and dimension drawings below for detailed specifications!
| Ratios | i | / | 3 | 4 | 5 | 7 | 8 | 10 | |
| Nominal output torque | T2N | Nm | 200 | 330 | 330 | 320 | 310 | 330 | |
| Emergency stop torque ② | T2Not | Nm | 1250 | 1320 | 1320 | 1320 | 1250 | 1250 | |
| Max. acceleration torque ③ | T2B | Nm | 460 | 790 | 790 | 790 | 640 | 640 | |
| Nominal input speed | n1N | rpm | 2100 | 2100 | 2100 | 2600 | 2600 | 2600 | |
| Max. input speed | nIMAX | rpm | 5000 | 5000 | 5000 | 5000 | 5000 | 5000 | |
| Max. backlash | / | arcmin | ≤3 | ||||||
| Torsional stiffness | / | Nm/arcmin | 50 | ||||||
| Max. axial force ④ | F2AMax | N | 9700 | ||||||
| Max. radial force ④ | F2AMax | N | 9750 | ||||||
| Efficiency | η | % | 97 | ||||||
| Life time | / | h | >20000 | ||||||
| Weight | / | kg | 17.5 | ||||||
| Noise emission | / | dB | ≤65 | ||||||
| Operation temperature | / | ℃ | +90 | ||||||
| Ambient temperature | / | ℃ | -15 to +40 | ||||||
| Lubrication | / | / | Lifetime lubrication | ||||||
| Rotation direction | / | / | Same rotation direction for input and output axes | ||||||
| Degree of gearbox protection | / | / | IP65 | ||||||
| Mass moment of inertia (input) | J1 | 38 | kgcm² | 15 | 12.15 | 11.00 | 10.20 | 9.50 | 9.50 |
| Ratios | i | / | 3 | 4 | 5 | 7 | 8 | 10 |
| Nominal output torque | T2N | Nm | 510 | 920 | 920 | 825 | 825 | 860 |
| Emergency stop torque ② | T2Not | Nm | 2750 | 2750 | 2750 | 2750 | 2750 | 2750 |
| Max. acceleration torque ③ | T2B | Nm | 1160 | 1450 | 1450 | 1450 | 1165 | 1165 |
| Nominal input speed | nIN | rpm | 1500 | 1500 | 1500 | 2300 | 2300 | 2300 |
| Max. input speed | nIMax | rpm | 4500 | 4500 | 4500 | 4500 | 4500 | 4500 |
| Max. backlash | / | arcmin | ≤3 | |||||
| Torsional stiffness | / | Nm/arcmin | 165 | |||||
| Max. axial force ④ | F2AMax | N | 13950 | |||||
| Max. radial force ④ | F2QMax | N | 15200 | |||||
| Efficiency | η | % | 97 | |||||
| Life time | / | h | >20000 | |||||
| Weight | / | Kg | 34 | |||||
| Noise emission | / | dB | ≤65 | |||||
| Operation temperature | / | ℃ | +90 | |||||
| Ambient temperature | / | ℃ | -15 to +40 | |||||
| Lubrication | / | / | Lifetime lubrication | |||||
| Rotation direction | / | / | Same rotation direction for input and output axes | |||||
| Degree of gearbox protection | / | / | IP65 | |||||
| Mass moment of inertia (input) | J1 48 | Kg/cm² | 58.30 | 41.30 | 35.50 | 29.80 | 29.70 | 26.60 |
| J1 55 | 66.00 | 50.00 | 44.10 | 38.70 | 38.70 | 35.60 | ||
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Our gear transmission parts are used in a wide range of mechanical assemblies
Leveraging 23 years of high-precision gear manufacturing experience, Kean specializes in high-volume custom gear solutions. Backed by globally leading equipment, over 30 patented technologies, and a scalable production capacity exceeding 35,000 non-standard parts annually, we provide clients with high-precision, cost-effective custom gears that meet the most stringent transmission requirements.
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