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The hole in an blade must be made to be smaller than the wood.
This is accomplished in three different ways.
The old blacksmith's way is to heat the blade so that the hole is large enough to go over the wood and when it is cooled it will shrink down to the size of the wood. Wagon wheels are made this way.
Secondly, the wood is put into the hole of the blade and then spread out with wedges that expand the wood. Hammers are often made this way.
Thirdly, in a pick axe the blade is dropped onto the the handle from the hand end and the working end is over-sized so that it will not slip off.
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Why are tools heated before fixing wooden handles?
Fair Question !! I can only assume that as metal shrinks when cooling, this would grip the wooden handle firmly, and reduce the risk of the handle coming loose when the tool is in use.
Why are tools often heated before fixing wooden handles?
Heating the metal tool expands them. After fitting the wooden handles the tools are allowed to cool and, as they do so, they contract so that they grip the handles tightly.
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Why are tools heated before fixing wooden handles?
Fair Question !! I can only assume that as metal shrinks when cooling, this would grip the wooden handle firmly, and reduce the risk of the handle coming loose when the tool is in use.
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