Rexnord MB251-12-PENPA Screw Locking Shaft Collar is a 1-1/2 inch outer-diameter collar from Rexnord that clamps to a shaft with a locking screw to secure mounted components. It belongs to the MB251 family of shaft collars and is used to locate and hold pulleys, gears, and bearing housings in place on rotating shafts. This collar provides a simple, reliable method for securing parts in automated and industrial machinery where precise shaft positioning is required.
