Rimfireboy Posted August 25, 2013 Report Share Posted August 25, 2013 If you need to heat or cool any bearings then I am afraid you have the wrong ones! They are made to fit tightly and the trick is to get them I to the hole without damaging the faces , the face of the bearings you removed are the perfect size so using them on top of the bearings you are fitting and hitting them with a hammer disperses the force of the hammer perfectly across the face of the new ones without distorting or damaging them in any way and they should pop in quite easily , there is no need to hit them with punches and risk damaging the faces . When they are fitted into the casing they will slide onto the shaft fairly easily and refitting the nut onto the shaft either with the pulley or a large flat washer will nip them into place for reassembly Bearings should be pressed in, not hit or hammered in. If you can't press them in, then cooling them makes the difference and you can then "tap" them in. I used to fit bearings into gear wheel assemblies for a living. They should be an interference fit, which means tight. Doesn't mean they're the wrong bearings.. Quote Link to comment Share on other sites More sharing options...
aris Posted August 25, 2013 Author Report Share Posted August 25, 2013 All sorted now - I used twstedsanity's advice and tapped them in gently with a mallet using the old bearings as a buffer. The machine is going like a boeing - hasn't been this smooth in some time. It is sure to last for many more years. They don't make machines like this any more! Quote Link to comment Share on other sites More sharing options...
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