SEW K Series Helical-Bevel Gearmotors
The SEW-EURODRIVE K Series provides a highly efficient right-angle drive solution. Unlike traditional worm gears, the helical-bevel gear design ensures an extraordinary efficiency of over 90% in both torque directions and at all input speeds. Designed for fatigue strength, these gear units offer wear-free gearing, meaning zero maintenance for the gearing components and exceptional long-term reliability. With torque ratings from 200 Nm to an impressive 50,000 Nm, the K series is the ultimate choice for continuous, high-load industrial applications.
Available K Series Variants (Mounting & Shaft Options)
Each base model below can be configured into specific variants to match your exact mechanical requirements. When requesting a quote, you can specify your required variant (e.g., KA127 or KF97):
- K / K..R: Foot-mounted solid shaft version.
- KA / KA..R: Hollow shaft version with keyway connection.
- KF / KF..R: Flange-mounted solid shaft version (B5 flange).
- KAF / KAF..R: Flange-mounted hollow shaft version.
- KV / KVF / KAZ: Hollow shaft with shrink disc or B14 flange options.
K Series Base Models & Technical Specifications
| Base Model | Max. Torque (Nm) | Gear Ratio (i) | Power Range (kW) | Details |
|---|---|---|---|---|
| K 37 | Up to 200 | 3.98 – 106.38 | 0.12 – 3.0 | Data Card |
| K 47 | Up to 400 | 5.81 – 131.87 | 0.12 – 5.5 | Data Card |
| K 57 | Up to 600 | 6.22 – 145.14 | 0.12 – 7.5 | Data Card |
| K 67 | Up to 820 | 7.14 – 144.79 | 0.12 – 7.5 | Data Card |
| K 77 | Up to 1,550 | 7.24 – 192.18 | 0.37 – 11.0 | Data Card |
| K 87 | Up to 2,700 | 7.16 – 197.37 | 0.75 – 22.0 | Data Card |
| K 97 | Up to 4,300 | 8.71 – 176.05 | 1.50 – 30.0 | Data Card |
| K 107 | Up to 8,000 | 8.69 – 143.47 | 3.00 – 45.0 | Data Card |
| K 127 | Up to 13,000 | 8.68 – 146.07 | 7.50 – 90.0 | Data Card |
| K 157 | Up to 18,000 | 12.65 – 150.41 | 11.0 – 160.0 | Data Card |
| K 187 | Up to 50,000 | 17.08 – 179.86 | 18.5 – 200.0 | Data Card |
Technical FAQs: SEW K Series
While worm gearmotors are compact and cost-effective, their efficiency drops at high ratios. The SEW K Series helical-bevel gears maintain a remarkably high efficiency (over 90%) regardless of the gear ratio or rotational direction. This results in significant energy savings and practically wear-free operation over a much longer lifespan.
Yes. The base models (like K127 or K97) act as the mechanical foundation. We supply all mounting configurations including KA (Hollow Shaft), KF (Flange Mounted), and combinations paired directly with high-efficiency AC motors (e.g., DRN series motors). Simply specify your required variant when contacting us.
To ensure an exact match for your existing SEW K Series gearbox, simply provide us with a clear photo of the SEW nameplate (which includes the Serial Number). Our technical team will decode the exact mounting position, flange size, gear ratio, and motor specs to supply a 100% compatible replacement.
