BMO-6204-048S2-UA008A sensor bearing unit: specifications & signal data

Specification table

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 BMO-6204-048S2-UA008A model number is decoded

Dimensionally the unit is 20/47/14 mm: the embedded deep groove ball bearing carries the load path and the sensor ring shares that same bore envelope; basic ratings are C 12.7 kN dynamic and C0 6.55 kN static, with a fatigue load limit of Pu 0.28 kN. Rated 48 pulses per revolution at a period accuracy of ±3%, the unit outputs two 90°-shifted signals held within ±20°; the mechanical limiting speed is 10000 r/min. A 1.939 static-to-dynamic load ratio confirms this is a genuine bearing unit rather than a bearing with a separate magnetic ring: C0 6.55 kN and C 12.7 kN are the standard ratings for this ISO 15 envelope. 130 g on a 20x47x14 mm envelope, fitted with a 535 mm lead and a free cable end. Across the 48-pulse size the plug type is the only electrical difference. Running to its 10000 r/min limit the 48-pulse channel emits 8000 Hz, one pulse per 7.5° of shaft turn — confirm the controller's maximum input frequency is not exceeded. the 20 mm bore places this in the small end of the range, where the compact rotor-mounted envelope suits light shafts and tight bearing seats BMO names a motor encoder unit built on a thin-section deep groove ball bearing for compact rotors: the digits after the prefix repeat the embedded bearing size (6204), then /048S2 gives the two-signal pulse count, U the worldwide sales region, the cage letter A or B the ball-cage material, and the final connector block the electrical interface. The trailing 008A marks the free cable end variant, supplied as a plain cable tail for the customer to terminate; it is the shorter-cable option of the pair. The U/A block means a stamped steel ball cage, standard for the sizes where the higher load ratings rule out a polymer cage. 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 rotor position and speed sensing with a 48-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 130 g mass keeps the rotating inertia low the sensor ring and the ball raceway share one compact unit — a bearing that is due for replacement takes the encoder signal with it, so renew both together the patterned sensor track is sensitive to contamination; a recessed or poorly sealed mounting face lets debris interrupt individual pulses the cable tail is part of the unit and cannot be shortened freely — terminating it outside the specified connector changes the screening and can corrupt the signal

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• the sensor ring and the ball raceway share one compact unit — a bearing that is due for replacement takes the encoder signal with it, so renew both together
• the patterned sensor track is sensitive to contamination; a recessed or poorly sealed mounting face lets debris interrupt individual pulses
• the cable tail is part of the unit and cannot be shortened freely — terminating it outside the specified connector changes the screening and can corrupt the signal