What this 1.5 kW servo motor delivers on a motion axis
The Siemens 1FL6064-1AC61-0LB1 is a SIMOTICS S-1FL6 servo motor rated at 1.5 kW with a rated speed of 2000 rpm, a holding torque M0 of 8 Nm, and a rated torque MN of 7.16 Nm. It runs on a 400 V three-phase AC supply and is designed as a spare part for the S-1FL6 series, compatible with SINAMICS V70 and V90 drives. The shaft height is 65 mm, and it includes a feather key with tolerance N. The motor is fitted with a 20-bit absolute encoder (12-bit multi-turn) and a holding brake, giving you position hold at standstill without a separate mechanical lock. The IP65 degree of protection with sealing ring means this motor can handle washdown environments — the housing and shaft seal keep coolant and dust out, which matters when the motor is mounted directly on a machine frame rather than in a clean cabinet.
Encoder and brake — what the 20-bit absolute encoder means for your application
The 20-bit absolute encoder (12-bit multi-turn) gives you 1,048,576 positions per revolution and tracks position across up to 4096 shaft revolutions after power loss. That means no homing cycle on power-up for rotary tables, gantries, or indexing axes — the drive reads the absolute position immediately. The holding brake is rated for static holding at standstill (M0 = 8 Nm), not dynamic braking. If you need to stop a moving load, the drive's regenerative braking handles the deceleration; the brake engages only after the motor is at zero speed to avoid wearing the friction surface.