BMO-6204-048S2-UA108A 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-UA108A model number is decoded

The 20 mm bore and 47 mm outside diameter carry the deep groove ball raceway while the 14 mm width houses the sensor ring; the published ratings are C 12.7 kN, C0 6.55 kN and a fatigue load limit Pu 0.28 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 ±20°; limiting speed 10000 r/min. Because the sensor ring does not alter the ball raceway, the static-to-dynamic ratio stays at 1.939 (6.55 kN against 12.7 kN), matching the plain bearing of this size. Physically the unit is a 20/47/14 mm, 140 g assembly with a 560 mm cable ending in a AMP Superseal connector; the 48-pulse electronics are otherwise fixed for the size. At the 10000 r/min limiting speed the 48-pulse track produces 8000 Hz per channel, i.e. 7.5° of shaft rotation per output pulse; check the receiving controller's input frequency range against that figure. with a 20 mm bore this is a small sensor bearing unit; the 47 mm outside diameter keeps the housing bore within ordinary machined tolerances BMO-6206/064S2 style designations are decoded as bearing code, pulse block and interface block — the /064 is not a part number but the number of pulses per revolution, and S2 confirms two output channels. The trailing 108A marks the AMP Superseal connector variant, the plug-and-play interface used where a sealed automotive connector is required; the cable is 5 mm longer than the free-end version of the same size. 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 industrial automation axis control, conveyor pulley speed and direction sensing and pump and fan rotor speed feedback this unit is commonly specified for industrial automation axis control and conveyor pulley speed and direction sensing, where rotor position and speed sensing with a 48-pulse signal fits the controller's input in pump and fan rotor speed feedback the integrated bearing carries the shaft load while the sensor ring supplies the signal; the 140 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 interface is not a resolver or a standard encoder protocol — the controller must accept the specific N-pulse two-signal format this unit produces 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 interface is not a resolver or a standard encoder protocol — the controller must accept the specific N-pulse two-signal format this unit produces
• 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