Bearing Press-Fit: Force Control and Damage

How a bearing press-fit line is specified

The bore and shaft tolerance, the bearing size, and whether the fit is by press or by thermal shrink decide the line. A press line without a force-depth curve is a line that ships damaged bearings and finds out at the customer.

Station sequence

Bearing feeding, shaft locating, press with force and depth recorded, then a noise or vibration check. The press station must load the ring that carries the interference fit: pressing through the balls transfers the load to the race and brinells it.

What decides reject rate

• Pressing on the wrong ring: the most common cause of early bearing noise, and it leaves no visible mark.
• Force window: state a minimum and a maximum. A minimum catches a loose fit, a maximum catches a cocked bearing.
• Misalignment: a bearing started 0.1 mm off axis seats at an angle and wears the cage.
• Contamination: one chip in the grease shortens life more than any dimensional error.

What we need from you

• Shaft and housing drawings with the fit tolerances
• Bearing designation and whether the fit is on the inner or outer ring
• The force window and the depth you accept
• Output per shift, and whether the assembly is greased on the line

How the project runs

Quote from drawing, tooling design, build, then run-off with your own bearings and shafts in our plant in Chashan. Machines are built to your samples and drawings, and the drawing set is agreed before metal is cut.

Send a drawing to [email protected] or call +86-18123647785 to start a quote. Related lines: toys gearbox assembly machines, car door lock assembly machines.