R911345915 (MSK101D-0300-FN-M1-BG0-NNAN)

The optical multilturn absolute encoder preserves position across power cycles and offers high resolution feedback via Hiperface, allowing the drive to resume without referencing. That eliminates homing time and reduces cumulative error in multi-axis systems.

The constraint comes from thermal limits in the windings and insulation system, plus cooling capacity and voltage drive capability. Exceeding it risks insulation breakdown or overheating even if torque could be mechanically supported.

Use coolant (e.g. water or water–glycol) with pH between 6–8, ensure the∆T across the motor does not exceed ~10 °C under nominal losses, and limit system pressure to ≤ 3.0 bar.

The relatively high inductance slows current dynamics and demands sufficient drive bandwidth and compensation to maintain servo performance. You’ll need a drive capable of handling slow current rise times without oscillations.

The permissible radial and axial forces are published in the Rexroth “Bearing & Shaft Load” section (e.g. ≤ 500 N axial), so external loading must stay within those limits to avoid bearing fatigue.