Product Description:

The HS35R1024D1A7PS is a hollow-shaft incremental encoder produced by Danaher and supplied under the Dynapar Encoders series. Mounted over a 3.5-inch motor shaft with a flexible tether, the unit converts mechanical rotation into square-wave signals for speed regulation, orientation tracking, and closed-loop positioning on conveyors, winders, and packaging axes in industrial automation. Its optical sensing engine and differential drivers allow noise-resistant feedback transmission over long cable runs.

Its native resolution of 1024 PPR means each mechanical turn generates 1,024 evenly spaced pulses, supplying fine granularity for velocity and count-based control. The encoder electronics accept frequencies up to 100 kHz, so high-speed drives can sample the output without missing transitions. The housing is sealed to NEMA 4/IP66, protecting the encoder against washdown fluids and airborne dust on plant-floor machinery. The mechanical section is balanced for continuous service at 3600 rpm, and the sealed bearings have a service life of 80,000 hours at that speed, reducing unplanned maintenance during continuous-duty operation.

Proper load handling and shaft alignment safeguard the electrical components and bearings. The encoder withstands an axial thrust of 30 lb and a radial side load of 40 lb without degrading pulse fidelity. Startup friction remains controlled, with a maximum starting torque of 5.0 oz-in and a running torque limited to 4.5 oz-in, so small servomotors can accelerate freely. Mechanical coupling accuracy is supported by a bore tolerance of +0.0003/+0.0005 in, a runout allowance of ±0.025 in, and shaft endplay of ±0.050 in. Despite its aluminum cover and integral LED status indicator, its weight remains below 16 oz, which eases installation on lightly supported shafts.