MDD025A-N-100-N2K-040MA0

Having both gives dual redundancy and higher fidelity in position sensing: the resolver handles robust analogue/sinusoidal signals (good in harsh conditions), while the absolute encoder preserves exact shaft position after power loss. This combination improves precision, reduces downtime for homing, and makes the motor suitable for critical closed-loop applications like semiconductor stepper or robot joints.

It means the motor can hold a significant static load without slipping or moving when powered but not turning; however thermal limitations and drive current must be managed since holding torque tends to generate heating. In designs with high duty cycles at zero speed, adequate cooling or intermittent duty may be needed to prevent overheating.

At 10,000 rpm, shaft imbalance or vibration has much larger effects, so precise balancing (“standard” balancing in spec) and mechanical coupling alignment are critical to avoid bearing fatigue. Also align coupling or load to avoid radial or axial offsets, and ensure lubrication and bearing selection match the speed and load profile.

The 40 mm centering diameter allows repeatable alignment on mounting flanges or hubs, but the keyway introduces stress concentrations—fillets and key fit must comply with DIN standards and ensure that the key does not create bending loads. Use matched hub geometry (flange or coupling) with minimal runout, shim if needed, and tighten bolts in proper sequence to distribute clamping evenly.

Without a holding brake, the motor cannot automatically resist external forces when unpowered—so in vertical axes or where load can reverse, you’ll need external brakes or mechanical locks for safety or to meet holding requirements. Also, safety circuits/design must account for loss of torque when power is removed.