The grooves of oil groove copper bushings are generally opened in the following positions:

Axial position

Close to both ends of the copper sleeve

Advantage: It is convenient to bring the lubricant into the friction surface as soon as possible when the shaft rotates in the installed state. The grooves at both ends can quickly receive and distribute the lubricant when the shaft starts to rotate, ensuring early lubrication effect and reducing start-up wear.

Disadvantage: For some long shafts or high speeds, there may be an insufficient supply of lubricant in the middle area of the shaft.

Uniform distribution over the axial length of the bushing

Advantage: The lubricant can be distributed more evenly over the entire contact surface between the copper sleeve and the shaft, improving the comprehensiveness and stability of the lubrication. Especially for long shafts or applications with more uniform load distribution, it can effectively reduce localized wear.

Disadvantages: processing is relatively complex, the cost may increase.

circumferential position

Close to the inner wall of the copper sleeve

Advantage: When the lubricant enters the groove, it can act directly on the contact interface between the copper sleeve and the shaft, forming an oil film quickly and reducing the coefficient of friction. This position of the oil groove can more effectively guide the lubricant to the key friction parts.

Disadvantage: If the oil groove is too deep or improperly machined, it may weaken the structural strength of the copper sleeve.

Near the center between the outer and inner walls of the bushing

Advantage: Allows for a somewhat balanced storage and distribution of lubricant. It will not affect the structural strength as much as close to the inner wall, but also can guide the lubricant to the friction surface relatively well.

Disadvantage: For some applications with high precision requirements, the lubricant may not reach the friction surface in a timely manner. shtnz bushing