SKF
Mounting (Spherical Plain Bearings)
Proper mounting of spherical plain bearings prevents damage to the sliding surfaces and ensures full load capacity. Techniques include press-fitting the outer ring into the housing using a mandrel that contacts only the outer ring face, never transmitting force through the sliding surfaces. For rod ends, clamping the shank without deforming the thread is essential. SKF provides mounting tools and dimensional instructions. Attention to alignment during installation prevents edge pressure and ensures the bearing swivels freely throughout its design range.
Send an Enquiry
We'll get back to you on WhatsApp.
Trusted by Industry Leaders
Press‑Fit Outer Ring
Use a mandrel that contacts only the outer ring face, never the inner ring.
Shrink‑Fit Option
Freezing or heating for large‑diameter bearings.
Rod End Clamping
Grip across the housing flats, never on the shank threads.
Pin Insertion Clearance
Shaft pin must have a slight clearance or transition fit to avoid brinelling during insertion.
Alignment During Assembly
The bearing must be free to swivel before applying axial retention.
Post‑Mounting Swivel Check
Verify smooth articulation through full tilt range.
Why You Must NEVER Press Through the Ball
If the mounting force is applied to the inner ring or the ball, the high point‑contact pressure can brinell the raceways, creating permanent indentations. This causes rough operation and rapid wear. SKF’s mounting instructions clearly state the force‑application path, and the correct mandrel design is essential.
Mounting a Spherical Plain Bearing into an Aluminium Housing
Aluminium housings expand more than steel bearings under heat. To prevent loss of grip, SKF recommends a higher interference fit or the use of retaining compound (Loctite) on the outer ring. The mounting mandrel must be piloted to ensure square entry, as aluminium is more easily scored than cast iron.