AHE-5701C sensor bearing unit: specifications & signal data
The AHE-5701C is a sensor bearing unit, rated 256 pulses per revolution with a 300 rpm limiting speed per ISO 15. Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Material | GCr15 |
| Limiting speed (mechanical) | 300 rpm |
| Mass | 570 g |
| Manufacturer designation | AHE-5701C |
| Standard | ISO 15 |
| Catalog version | SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 17 sensor bearing units |
| Last verified | 2026-10-19 |
| Number of pulses per revolution N | 256 |
| Period accuracy | 8 % |
| Phase shift between signals | 90 ° |
| Phase shift tolerance | 30 ° |
| Duty cycle | 50 % |
| Duty cycle tolerance | 10 % |
| Cable connector | AMP Superseal plug |
| Electrical angle per pulse (360°/N) | 1.406 ° |
| Two-channel edges per revolution (4×N) | 1024 |
| Pulses per shaft degree (N/360) | 0.711 |
| Output frequency at limiting speed (N×rpm/60) | 1280 Hz |
| Signal period at limiting speed | 0.781 ms |
| Output frequency at 1 000 r/min (N×1000/60) | 4266.667 Hz |
| Signal period at 1 000 r/min | 0.234 ms |
| Output channels (two-signal) | 2 |
| Phase shift tolerance window | 60 to 120 ° |
| Duty cycle tolerance window | 40 to 60 % |
Source: catalog reference (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 17 sensor bearing units) · extracted 2026-10-19
Parameters extracted from the official SKF Rolling Bearings catalogue (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 17 sensor bearing units); SKF® and SKF Explorer® are trademarks of AB SKF, used here for identification only — mpnbase is not an authorized SKF distributor. Boundary dimensions are ISO 15 interchangeable; current production values may differ, verify at skf.com.
Cross references & equivalents
No verified interchange data yet. Send an inquiry and our team will confirm equivalents manually.
How the AHE-5701C model number is decoded
Internally a sealed SKF Explorer deep groove ball bearing carries the wheel-shaft load while a friction-torque device generates the steering feel; the assembly leaves the factory ready to mount, terminated in a AMP Superseal connector. Signal output is 256 pulses per revolution as two 90°-shifted channels, duty cycle 50 ± 10% and phase tolerance ±30°; the mechanical limit is 300 r/min. At 570 g the unit is designed to run untouched for its whole life: no field adjustment of phase or duty cycle, and no relubrication point to service. 256 pulses per revolution resolve 1.406° of hand-wheel rotation per pulse (0.711 pulses per degree), giving the steering controller its position and rate signal directly from the wheel shaft. this is the highest pulse count in the sensor bearing range at 256, chosen when the controller must resolve small angles between successive pulses reading the steering unit designation: AHE is the family, 54xx is the lower-pulse steering size and 57xx the higher-pulse size, and the final letter is the design generation — the connector is the same AMP Superseal part across the range. typical applications include electric drive commutation and speed control, automotive electric power steering and medical equipment rotary positioning this unit is commonly specified for electric drive commutation and speed control and automotive electric power steering, where hand-wheel input with a 256-pulse signal fits the controller's input in medical equipment rotary positioning the integrated bearing carries the shaft load while the sensor ring supplies the signal; the 570 g mass keeps the rotating inertia low the unit is rated for a low limiting speed; it is a hand-wheel input device and must never be used as a high-speed shaft encoder the unit expects hand-wheel speeds only; a motor-driven input will exceed its low limiting speed and destroy the friction device long before the electronics complain there is no field adjustment for phase or duty cycle; a controller that expects a different signal convention needs a different unit, not a trim
Typical equipment & failure modes
Common applications
- medical equipment rotary positioning
- electric drive commutation and speed control
- robotic joint position feedback
- crane and hoist position limiting
Known failure patterns
- the unit is supplied ready-to-mount; dismantling it to reach the bearing or the sensor destroys the factory calibration and the seal
- the unit is rated for a low limiting speed; it is a hand-wheel input device and must never be used as a high-speed shaft encoder
- the unit expects hand-wheel speeds only; a motor-driven input will exceed its low limiting speed and destroy the friction device long before the electronics complain
- the friction-torque device is tuned for hand-wheel feel — altering or lubricating it changes the feedback the driver feels, not just the signal
- the steering-feel device and the encoder share one sealed housing, so the assembly must never be opened to inspect the bearing — the housing is the calibration
Selection pitfalls — read before you substitute
- the unit is rated for a low limiting speed; it is a hand-wheel input device and must never be used as a high-speed shaft encoder
- the unit expects hand-wheel speeds only; a motor-driven input will exceed its low limiting speed and destroy the friction device long before the electronics complain
- there is no field adjustment for phase or duty cycle; a controller that expects a different signal convention needs a different unit, not a trim
Frequently asked questions
What does the AHE designation mean?
In the AHE scheme a steering encoder unit for steer-by-wire systems is encoded as AHE-5701C: the suffix block carries the pulses-per-revolution count, the S2 two-signal flag, the region and cage letters, and the connector code, so the full spec is readable from the part number.
How many pulses per revolution does the AHE-5701C deliver?
Resolution is 256 pulses per revolution, delivered as two phase-shifted channels; the period accuracy is ±8%, with the phase nominally 90° and held within ±30°.
Is the AHE-5701C adjustable?
No. The steering encoder unit is supplied ready-to-mount and needs neither adjustment nor relubrication; the friction-torque device is factory-set to give the driver the specified steering feel.
How is the AHE-5701C connected?
Connection is by an AMP Superseal connector, carrying two 256-pulse channels. The cable and connector variant is an order-time choice and cannot be changed in the field.
Reviewed & verified by the MPN Base engineering desk against source catalog SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 17 sensor bearing units on 2026-10-19. Read our editorial & correction policy.