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Thread: Thermal shrink fit
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14th November 2012, 09:39 PM #16SENIOR MEMBER
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Thermal shrink fit
Hi Russell,
Press fit is 0.001" to the inch if I remember correctly and I did say if lol. Shrink fit is a bit different.
Phil
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15th November 2012, 09:12 PM #17Senior Member
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Hello Phil,
Yes, I think you may be (almost certainly are) correct. I just remember a fitter at work saying one thou. to the inch but I don't remember if he was talking about press fit or shrink fit. My little Engineers Black Book has the information, but I cannot comprehend what it means.
Russell
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15th November 2012, 09:29 PM #18SENIOR MEMBER
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Thermal shrink fit
Hi Russell,
I have always used 1 thou per inch of diameter for press fit (as a rule of thumb).
I once had to shrink fit a stub gear to a 3" shaft. This gear drove the barrel on a cement truck. The interference for the 3" shaft was 5 thou. There was no key or locking screws in the gear just purely a shrink fit. 8 years later it is still driving the barrel and hasn't moved at all.
Phil
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