Dismantling method for needle roller bearings
Tapping method
The striking force is generally applied to the inner ring of the bearing. The striking force in the shielding machine room should not be applied to the rolling element and retainer of the bearing. This method is simple and easy to operate, but it can easily damage the bearing. When the bearing is located at the end of the shaft, use a copper rod or other soft metal material smaller than the inner diameter of the bearing to support the shaft end, add a cushion block to the lower part of the bearing, and gently tap with a hammer to remove it. When applying this method, attention should be paid to the appropriate placement of the cushion blocks and the correct focus points.
Hot disassembly method
Used for dismantling tight fitting bearings. First, pour the engine oil heated to around 100 ℃ onto the bearing to be disassembled using an oil pot. After the bearing ring expands due to heat, use a puller to pull out the bearing. [1]
Push-pull method
Use a press to push the bearings, ensuring smooth and reliable operation without damaging the machine and bearing shielding machine room. Pressure machines have manual pushing, mechanical or hydraulic pushing. Attention: The force point of the press should be at the center of the shaft and should not be deviated.
Pull-out method
Using specialized pullers, when disassembling, as long as the handle is rotated, the bearing will be slowly pulled out. When disassembling the outer ring of the bearing, the corners of the puller's two legs should be opened outward; When disassembling the inner ring of the bearing, the two feet of the puller should be facing inward and stuck on the end face of the bearing inner ring.
