Product Description:

The HS35R1024H142 is a hollow-shaft incremental encoder manufactured by Danaher within the Dynapar Encoders series. It slips over a 1.375-inch motor shaft and produces differential quadrature signals that controllers use for precise speed and position feedback in automated machinery. By converting mechanical rotation into synchronized digital pulses, the encoder supports closed-loop regulation of conveyors, web lines, and servo axes where repeatable angular data are required.

The encoder provides a resolution of 1024 PPR, so every full turn is divided into 1024 uniformly spaced pulses. A frequency response of at least 100 kHz allows those pulses to be counted without loss at higher speeds, and the sensing electronics accept shaft speeds up to 3600 rpm. Pulse symmetry is held to 180° ±18° electrical, limiting duty-cycle distortion that could skew velocity calculations. Rise and fall times remain under 1 µs, keeping square-wave transitions sharp for high-speed counters. Quadrature phasing is specified at 90° ±22.5° electrical, maintaining the phase separation required for bidirectional decoding. Tolerances of ±0.025 inch for radial runout and ±0.050 inch for axial endplay indicate how much shaft motion the optical system can absorb while maintaining signal integrity.

The mechanical section withstands a radial load of 40 lb and an axial load of 30 lb, so it tolerates belt tension or coupling misalignment without premature bearing wear. Maximum running torque is limited to 4.5 oz-in, reducing drivetrain drag, while starting torque peaks at 5.0 oz-in during initial breakaway. A shaft bore tolerance of +0.0003/+0.0005 inch ensures a slip fit, and the encoder accepts a minimum shaft engagement of 1.25 inches for proper clamping. Total mass remains under 16 oz, keeping overhung weight low on smaller motors and gearboxes.