HS35R02507251 Danaher
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The Danaher HS35R02507251 is an incremental encoder from the Dynapar Encoders series with a resolution of 250 pulses per revolution and a bore size of 1/2 inch. It supports a maximum shaft speed of 3600 RPM and has an enclosure rating of NEMA 4 / IP66. The encoder handles axial loads up to 30 pounds, radial loads up to 40 pounds, and weighs no more than 16 ounces.
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Product Description:
The HS35R02507251 is an incremental hollow-shaft encoder produced by Danaher for the Dynapar Encoders series. It attaches directly to a rotating shaft and generates two square-wave channels in quadrature. An index pulse provides a reference position, while the quadrature signals allow drives and PLCs to calculate angular displacement, direction, and rotational velocity for closed-loop automation tasks.
A stainless-steel hub provides a bore size of 1/2 in, with a bore tolerance of +0.0003 to +0.0005 in to minimize eccentricity. The encoder withstands an axial load of 30 lb and a radial load of 40 lb, allowing it to operate under the forces associated with direct shaft mounting. Starting torque is limited to a maximum of 5.0 oz-in, while running torque is limited to a maximum of 4.5 oz-in. These low torque requirements reduce drag on the driven shaft and limit power loss during operation. The encoder weighs no more than 16 oz, keeping its added mass low for servo applications. Quadrature phasing accuracy is 90° ±22.5° electrical, providing consistent channel separation for direction sensing.
The encoder delivers a resolution of 250 PPR, providing a moderate pulse count for speed and position monitoring. Its output stages support frequencies of at least 100 kHz, allowing reliable pulse transmission at elevated shaft speeds. The rotor can turn continuously at a maximum speed of 3600 rpm without degrading pulse fidelity. The sealed enclosure provides NEMA 4 and IP66 protection against dust, moisture, and water directed at the housing. Low starting friction helps maintain stable operating torque, while the enclosure protects the internal optical components in industrial environments. The available signal performance supports feedback applications on conveyors, pumps, and light machine tools that require quadrature position and speed data.
