AC servo motor
Siemens SIMOTICS S-1FT7
High-performance servo motor family for SINAMICS S120 covering larger torques, with natural, forced-air or water cooling and IP67 sealing for machine-tool and production machinery duty.
Key specifications
| Ingress protection | IP64 to IP67 (product page: IP67) |
|---|---|
| Rated torque | 1.4–250 Nm |
| Standstill torque (max) | 280 Nm |
| Rated speed | 1500-6000 |
| Power | 850–45,500 W |
| Frame sizes | 36, 132 mm |
| Feedback | single-turn absolute, multi-turn absolute, incremental, DRIVE-CLiQ |
| Overload | 400% (naturally cooled versions) |
| Cooling | natural, forced ventilation or water cooling |
Summarised in our own words from Siemens AG's published data; series maxima, individual models vary. Last checked 2026-10-29. Source 1 · Source 2
Notes on this data
Product page: CT rated torque 2-250 Nm, 1500-6000 rpm, 0.85-45.5 kW; HD 11-82 Nm, 2000-4500 rpm, 3.8-21.7 kW. 2022 brochure: standstill CT 2-280 Nm, HD 14-105 Nm, rated torque 1.4-250 Nm, 0.88-45.5 kW. Minor conflict on power min (0.85 vs 0.88 kW). Applications 'machine tools/production machines' inferred from Siemens positioning; verify before publishing.
Specify Motion is not affiliated with Siemens AG. Siemens and SIMOTICS S-1FT7 are used only to identify the product. Comparisons use published figures; always confirm against the current datasheet.
Typical applications
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