The production process of bearing bush (the core component of plain bearings) involves multiple links such as material selection, precision machining and surface treatment to ensure its wear resistance, bearing capacity and lubrication performance. The following is a typical bearing production process:

1. Material selection
Bearing bushing is usually made of multilayer composite material or metal alloy, common types include:

Metal base axle tile: copper base (such as lead bronze, tin bronze), aluminum base (aluminum tin alloy) or Babbitt alloy (tin antimony copper alloy).

Multi-layer composite bearing: composed of steel back (support layer) + intermediate alloy layer (such as copper or aluminum) + surface anti-friction layer (polymer or coating).

2. Production process flow
(1) Steel back preparation
Blanking: The steel plate is cut to the desired size.

Stamping forming: stamping into semicircular or circular tile billet by die.

Cleaning treatment: Remove the oil and oxide layer on the back surface of the steel to ensure the subsequent bonding strength.

(2) alloy layer bonding
Sintering method (for copper base/aluminum base axle tile) :

The copper powder or aluminum powder is evenly spread on the back of the steel and sent to the sintering furnace under high temperature pressure to form a metallurgical bond.

Rolling method:

The alloy layer is pressed to the back of the steel by hot or cold rolling.

Centrifugal casting method (Babbitt bearing bushing) :

Molten babbitt alloy is poured into the rotating steel back, and the centrifugal force distributes the alloy evenly.