Knurling ✔

This video is all about the term KNURLING under mechanical engineering ........................

KNURLING :

let us learn about the term Knurling.
Knurling is a manufacturing process, typically conducted on a lathe, whereby a pattern of straight, angled or crossed lines is rolled into the material.
The operation is performed for producing indentations on a part of a workpiece.
Knurling allows hands or fingers to get a better grip on the knurled object than would be provided by the originally smooth metal surface.
Occasionally, the knurled pattern is a series of straight ridges or a helix of "straight" ridges rather than the more-usual criss-cross pattern.
Knurling may also be used as a repair method: because a rolled-in knurled surface has raised areas surrounding the depressed areas, these raised areas can make up for wear on the part.


In the days when labor was cheap and parts expensive, this repair method was feasible on pistons of internal combustion engines, where the skirt of a worn piston was expanded back to the nominal size using a knurling process.
As auto parts have become less expensive, knurling has become less prevalent than it once was, and is specifically discouraged by performance engine builders.
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