Product Description:

The HS35R0900432E is a hollow-shaft incremental encoder manufactured by Danaher as part of the Dynapar Encoders series. Installed directly on a three-phase motor or line shaft, it converts mechanical rotation into electrical pulses that drives, PLCs, and safety relays count for velocity regulation and positioning tasks in automated machinery. The unit delivers precise motion feedback while tolerating industrial contaminants and vibration.

A precision stainless steel insert provides a 3/8 in hub, and the bore is held to a tolerance of +0.0003/+0.0005 in so the code wheel stays concentric with the machine shaft. Each revolution is divided into 900 PPR, giving controllers fine resolution for indexing or speed-loop gain tuning. The output driver responds at up to 100 kHz, allowing the encoder to maintain full resolution even on high-speed axes. Rise and fall transitions remain below 1 μs, which minimizes timing jitter in high-speed counting circuits. An environmental seal rated NEMA 4 / IP66 keeps dust, oil, and directed washdown water out of the electronics, preserving the optical disk’s clarity during long production runs.

Normal operating torque is limited to 4.5 oz-in, so friction losses on lightly loaded spindles are negligible, while starting torque reaches a maximum of 5.0 oz-in. The code wheel can track shafts at speeds up to 3600 rpm without losing synchronization, and radial runout is held within ±0.025 in to prevent disk wobble. The internal components withstand shocks of 50 G for 11 ms, protecting alignment during machine impacts or transport. Overall mass does not exceed 16 oz, so the encoder adds minimal inertial load to delicate drive trains. Axial shaft play of ±0.050 in is acceptable without degrading signal quality. The encoder also accommodates combined shaft loads of 40 lb radially and 30 lb axially.