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Compact cylindrical rotary encoder with tapered shaft and radial 8-pin connector

Sick

Sick SRS50-HFA0-K21 motor feedback system rotary

SKU CH-HNEM-Z3HQK

High-precision rotary feedback system with tapered shaft and spring mounting plate for 12,000 rpm operation and 200 kHz signal output

  • Precise positioning with 0.0025 mm/mm dynamic angular accuracy
  • High-speed operation up to 12,000 rpm for demanding applications
  • Long service life rated at 3.6 x 10^9 revolutions
  • Compact 0.2 kg design with tapered shaft mounting
  • Reliable sine/cosine output at 200 kHz frequency

Motor feedback system for precision drives

The Sick SRS50-HFA0-K21 is a rotary feedback system built for electricians and automation engineers who need accurate position data on motor shafts. It delivers sine/cosine signals at up to 200 kHz output frequency from a compact 0.2 kg housing with a tapered shaft and spring mounting plate.

Installation notes and common issues

The unit connects via an 8-pin male radial connector and operates on a 7 V to 12 V DC supply range with 8 V DC recommended. Installers must keep static shaft offsets within ±0.25 mm radial and ±0.75 mm axial, and dynamic offsets within ±0.1 mm radial and ±0.2 mm axial, otherwise signal quality degrades.

Interface and operating limits

The encoder draws up to 80 mA and supports speeds up to 12,000 min⁻¹ with angular acceleration up to 200,000 rad/s². Operating torque is 0.2 Ncm with a 0.4 Ncm start-up torque. Bearing life is rated at 3.6 × 10⁹ revolutions, and angular motion perpendicular to the axis must stay within ±0.005 mm/mm static and ±0.0025 mm/mm dynamic.

How it compares

Measured against everything we stock in Electrical Trade Tools & Kits, at today’s prices. Recalculated every night.

Price $274.99
Pricier than about 85% of the 5,006 comparable items (median $95.99).

Specifications

Product
Brand nameSICK
Model nameSICK SRS50-HFA0-K21

Questions about this item

How do I verify the SRS50-HFA0-K21 is operating correctly after installation?

Check that the 8-pin male connector supplies 7 V DC to 12 V DC and that the sine/cosine output frequency reaches 200 kHz at the rated 12 000 min⁻¹ speed.

What comes with the SRS50-HFA0-K21 and what must I source separately?

The unit includes the rotary encoder with tapered shaft and spring mounting plate; you must supply an 8-pin mating connector and a 7 V DC to 12 V DC power source.

Which SRS50-HFA0-K21 variant should I select for my application?

Only the SRS50-HFA0-K21 model is listed, featuring a tapered shaft, spring mounting plate, 10 gcm² rotor inertia and 0.2 Ncm operating torque.

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