Product Description:

The HS35R1024H39C is a hollow-shaft incremental encoder manufactured by Danaher as part of the Dynapar Encoders series. When coupled to a motor or machine shaft, the unit produces evenly spaced digital pulses that enable motion controllers to monitor rotational position and velocity with precise electronic feedback. This feedback supports industrial automation tasks such as conveyor indexing, coil winding, and cut-to-length control. The hollow hub accommodates shaft extensions from 1.25 in to 2.0 in long, providing flexibility for direct installation on compatible equipment.

Its optical disk generates 1024 PPR, so each pulse represents 0.351° of mechanical rotation. The signal chain supports a minimum frequency response of 100 kHz, which maintains pulse integrity at shaft velocities up to the mechanical limit of 3600 rpm. The bearing design limits running friction to 4.5 oz-in, minimizing drag on light-duty servo spindles, while the sealed housing carries a combined NEMA 4 / IP66 rating that blocks dust and water jets. The encoder tolerates axial movement of ±0.050 in without losing accuracy, and radial runout is limited to ±0.025 in to preserve the sensor-to-disk air gap. Breakaway friction remains below the starting torque limit of 5.0 oz-in, helping the shaft begin rotating without excessive resistance.

For direct mounting on drive shafts, the encoder withstands radial and axial forces of 40 lb and 30 lb, respectively, providing resistance to belt tension and coupler misalignment. Its shock resistance is rated at 50 G for 11 ms, making the device suitable for equipment exposed to sudden impacts. Despite these mechanical safeguards, the assembly weighs only 16 oz, reducing the overhung load placed on support bearings. Precise hub-to-shaft engagement is supported by a bore tolerance of +0.0003/+0.0005 in, allowing installation without machining or adhesive shims. The controlled fit also helps maintain alignment between the encoder hub and the rotating shaft during regular machine operation.