1 kW servo motor for SINAMICS V70/V90 systems
The Siemens 1FL6062-1AC61-0LB1 is a SIMOTICS S-1FL6 servo motor rated at 1 kW, 2000 rpm, with a standstill torque of 6 Nm and a rated torque of 4.78 Nm. It is explicitly listed as a spare part for the 1FL6 family, meaning it is intended as a direct drop-in replacement for existing installations, not a new-design variant. The motor carries a 20-bit absolute encoder (12-bit multi-turn) — that resolution holds position repeatability within a few arc-seconds per revolution, critical for contouring or indexing where the servo loop must settle without overshoot. The holding brake locks the shaft when power is off, so a vertical axis won't drift during a cycle stop.
Mechanical fit and mounting constraints
Shaft height is 65 mm with a feather key and tolerance N — the N fit means the keyway is slightly looser than a press fit, allowing the key to slide in without force but still transmit full rated torque without backlash. IP65 protection with a sealing ring means the motor body and shaft seal withstand washdown spray; suitable for food-and-bev lines or coolant-laden machine-tool environments. The motor runs on 400 V 3 AC and is compatible with SINAMICS V70 and V90 drives — no adapter or firmware tweak needed for the feedback interface. If you are retrofitting into an existing V70/V90 cabinet, the encoder cable pinout matches the standard Siemens MOTION-CONNECT line.