BUSHING 0 70

132 390 88 BUSHING 0 70 Installed in high-load pivot points, such as boom and feed linkages, this bushing acts as a sacrificial bearing. Its primary job is to absorb radial forces and allow for smooth, controlled articulation between two moving components. By providing a replaceable wear surface, it protects more costly and complex parts like pins and their corresponding housings from direct metal-on-metal contact and gradual damage.

Properly functioning bushings are essential for drilling accuracy and overall machine stability. When a bushing wears out, it introduces excessive play or 'slop' into the joint. For example, worn bushings in the boom can make it difficult to position the feed accurately, leading to poor collaring and increased stress on the entire drill string. This looseness can also transmit vibrations through the structure, accelerating wear on other components.

Listen for unusual noises like creaking or grinding from pivot points during operation, as this can signal a worn bushing. A visual inspection should check for excessive movement or 'wobble' in the joints. Regular greasing is the best way to maximize service life. When replacing the bushing, always inspect the pin for wear and replace both if necessary to restore the joint to its original tolerance.