How to Fix a Bush on a Shaft?
2 Answers
Generally, the bush has an interference fit with the housing hole. Self-lubricating bearings or bushes do not require additional fixation as they are typically pressed into the housing hole. If it is necessary to fix the bush, a circlip method can be used. A circlip groove is added at both ends of the bush, and then a circlip is used to secure the bush, ensuring that the bush remains stationary in the axial direction. Below is more information about bushes: 1. A bush is a cylindrical mechanical part that fits over a rotating shaft and is a component of a plain bearing. The bush has an interference fit with the bearing housing and a clearance fit with the bearing seat. A bush refers to a sleeve on a propeller shaft or shaft. 2. A bearing is a component that fixes and reduces the friction coefficient of the load during mechanical transmission. The similarity between a bush and a bearing is that both bear the load of the shaft.
I found there are several methods to fix a bushing on a shaft. The most common one is interference fit, where the shaft is slightly larger than the bushing hole, and it's pressed in using a press to form a tight fit. If the bushing becomes loose or vibrates, adding a bolt for fixation works well—drill a hole in the bushing and tighten a screw to press against the shaft. Keyway fixation is also common, where small grooves are cut on both the shaft and bushing, and a key block is inserted to prevent rotation and dislodging. I often use these methods when repairing transmissions. Before installation, apply a bit of anti-rust oil to lubricate the shaft surface, but not too much, as it can make it too slippery and unstable. When replacing a new bushing, pay attention to dimensional tolerances—too tight and it may crack, too loose and it may wobble. Measure the clearance before proceeding. Regular maintenance involves checking the fixation, such as listening for unusual noises or feeling for high temperatures during rotation, to detect issues early and prevent accidents. These methods are simple and reliable, suitable for various machinery.