BMO-6205-048S2-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-6205-048S2-UA008A model number is decoded

The 25 mm bore and 52 mm outside diameter carry the deep groove ball raceway while the 15 mm width houses the sensor ring; the published ratings are C 14 kN, C0 7.8 kN and a fatigue load limit Pu 0.335 kN. The encoder delivers 48 pulses per revolution as two output channels 90° apart, each pulse period accurate to ±3% and the phase held to within ±30°; limiting speed 8500 r/min. Because the sensor ring does not alter the ball raceway, the static-to-dynamic ratio stays at 1.795 (7.8 kN against 14 kN), matching the plain bearing of this size. Physically the unit is a 25/52/15 mm, 160 g assembly with a 535 mm cable ending in a free cable end; the 48-pulse electronics are otherwise fixed for the size. At the 8500 r/min limiting speed the 48-pulse track produces 6800 Hz per channel, i.e. 7.5° of shaft rotation per output pulse; check the receiving controller's input frequency range against that figure. at 25 mm bore this size balances load capacity against the compactness needed at the rotor end of a motor shaft reading the BMO stack left to right: the embedded bearing code fixes the ISO 15 boundary dimensions, /048S2 fixes the output as two 48-pulse signals, and the U + cage + connector tail describes region, cage material and plug. The 008A tail means a free cable end: a plain unterminated lead for the customer to fit their own connector, and the shorter cable of the two options. The U/A block is a stamped steel ball cage, the standard choice at sizes whose load ratings are too high for a polymer cage. typical applications include servo motor rotor feedback, textile spindle speed control and wind turbine yaw and pitch feedback this unit is commonly specified for servo motor rotor feedback and textile spindle speed control, where rotor position and speed sensing with a 48-pulse signal fits the controller's input in wind turbine yaw and pitch feedback the integrated bearing carries the shaft load while the sensor ring supplies the signal; the 160 g mass keeps the rotating inertia low the two output channels must be screened as a pair; running them alongside motor power cables induces noise that the controller can read as extra 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 mounting the unit on a rotor with excessive unbalance or axial play loads the sensor ring unevenly and shows up as a periodic error in the signal

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• the two output channels must be screened as a pair; running them alongside motor power cables induces noise that the controller can read as extra 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
• mounting the unit on a rotor with excessive unbalance or axial play loads the sensor ring unevenly and shows up as a periodic error in the signal