Product Description:

The HS35R1024H374 is a hollow-shaft incremental encoder manufactured by Danaher in the Dynapar Encoders series. This rotary feedback device attaches directly to a motor or drive shaft and converts mechanical rotation into digital pulses for speed or position monitoring in industrial automation systems. By combining optical sensing with a sealed housing, the unit supplies reliable signals in harsh plant environments.

It provides a resolution of 1024 PPR, meaning every revolution produces 1024 pulses for precise velocity calculations. The output electronics switch at up to 100 kHz, allowing controllers to capture high-speed transitions without losing counts. The internal circuitry draws no more than 100 mA, minimizing the load on 5 V or 12 V supply rails. A housing rated NEMA 4/IP66 blocks dust and water, supporting installation in washdown areas. The hollow hub fits a 1-1/8 in shaft, and its +0.0003/+0.0005 in tolerance keeps the connection tight without requiring excessive installation force. Quadrature phasing remains at 90° ±22.5° electrical, while symmetry stays within 180° ±18°, providing balanced channel spacing. The rotating assembly has a moment of inertia of 25.6 × 10⁻⁴ oz-in-s², reducing the dynamic load on small servo drives.

The maximum shaft speed is 3600 rpm, allowing the code wheel to remain stable during continuous operation. Once rotation starts, drag on the host machine is modest; running torque reaches only 4.5 oz-in, and breakaway torque is 5.0 oz-in, so the coupling does not require oversized bearings. The encoder tolerates axial displacement of ±0.050 in and radial runout of ±0.025 in without signal loss, accommodating normal shaft deflection. Its weight of 16 oz keeps cantilever loading low on gearboxes, while the low rotating inertia further limits vibratory forces during acceleration.