BMB-7052A 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 BMB-7052A model number is decoded

A 30/62/24.6 mm sensor bearing unit around a 6206 deep groove ball bearing (C 19.5 kN, C0 11.2 kN, Pu 0.475 kN) whose sensor ring reports rotor position once per revolution (N = 1). The angular error of the position signal is ±3.5°, the phase shift is 90° within ±3°; limiting speed 12000 r/min and mass 250 g. The unit is a load-carrying bearing first and a sensor second: the 62 mm outside diameter is a standard 6206 boundary, so housing and shaft tolerances are the ordinary ISO 15 ones, plus the associated snap ring for axial location. With a single position pulse per revolution the unit is aimed at rotor commutation and coarse position feedback, not at fine speed measurement. the 30 mm bore is the mid-range workhorse size, pairing a 62 mm outside diameter with enough load capacity for general rotor feedback BMB-7052A names a rotor positioning sensor bearing unit: BMB is the motor encoder family tag, 7052 is the unit code for the 6206-based position sensor, and the trailing A is the variant letter. typical applications include medical equipment rotary positioning, robotic joint position feedback and crane and hoist position limiting this unit is commonly specified for medical equipment rotary positioning and robotic joint position feedback, where rotor position and speed sensing with a 1-pulse signal fits the controller's input in crane and hoist position limiting the integrated bearing carries the shaft load while the sensor ring supplies the signal; the 250 g mass keeps the rotating inertia low the associated snap ring references a standard 6206 axial location; substituting a different ring alters the sensor air gap and the absolute angle reference the mounting must keep the sensing face concentric; eccentric mounting shows up as a once-per-revolution angle error of exactly the type the unit is meant to avoid the position pulse is referenced to the rotor, so any slip between the ring and the rotor is indistinguishable from a genuine angle change

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• the associated snap ring references a standard 6206 axial location; substituting a different ring alters the sensor air gap and the absolute angle reference
• the mounting must keep the sensing face concentric; eccentric mounting shows up as a once-per-revolution angle error of exactly the type the unit is meant to avoid
• the position pulse is referenced to the rotor, so any slip between the ring and the rotor is indistinguishable from a genuine angle change