Chamfer
Glossary · Part Features
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A chamfer is an angled cut across an edge or corner, most commonly at 45 degrees, that replaces a sharp corner with a short flat.
In practice
Written on a drawing as something like .030 x 45°. Chamfers are used to remove sharp edges, to help a part start into a bore or thread, and to give a weld somewhere to sit.
Why it matters
A lead-in chamfer is what makes an interference fit assemble without shearing metal off the bore. Leaving it off can turn a routine press fit into a scrapped housing.
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