A, the push method
Press push needle roller bearing, the work is stable and reliable, does not damage the machine and the needle roller bearing shielding room.
Special note: press the focus should be at the center of the shaft, the partial pressure is not allowed.
Second, the tapping method
Knock force general combined needle roller bearing inner ring, shielding room tapping force should not be added in the needle roller bearing roller and keep on the shelf, when the needle roller bearing, at the end of the shaft, with less than the needle roller bearing inner diameter of the copper bar or other soft metal materials resist shaft end, lower part of needle bearing block, hammer knock gently, can be removed.This method is simple, but easy to damage the needle roller bearing.
Special note: the application of this method should pay attention to the position of the block placed properly, focus should be correct.
Three, pull
By special puller, remove, as long as the rotating handle, needle roller bearing is slowly.Remove the needle roller bearing outer ring, pull two foot corners should open outward;Remove the needle roller bearing inner ring, with both feet should be inward, card on the needle roller bearing inner ring end face.
Special note: should pull hook hook bearing inner ring, and should not hook on the outer ring, so as to avoid excessive or damage to the bearing looseness;With two feet of corner should be less than 90 °.
Four, thermal method
Needle roller bearing is used to remove the tight fit.First will be heated to 100 ℃ or so oil in oil pot pouring in to dismantle the needle roller bearing, after waiting for needle roller bearing ring heat expansion, can be used to pull it back out.
Special note: before heating, want to use asbestos rope or sheet iron shaft wound, to prevent the shaft is heated swell, otherwise, it will be hard to remove from the needle roller bearing box shell hole removing needle roller bearing, only heating needle bearing box shell hole, not heat the needle roller bearing.
Understand the needle roller bearing removal methods and matters needing attention, you will find that each of them has its characteristic, so the choices, it is necessary to analyze the specific circumstances, it is easy to see which one to use removal methods and damage the bearing itself.And don't blindly to remove, so easy to cause unnecessary losses.
