Re: What is Knurling valve guides?

Posted by Heat Houser on September 26, 2005 at 15:51:23 from (12.179.2.194):

In Reply to: What is Knurling valve guides? posted by biggerred on September 26, 2005 at 15:16:50:

Many tool handles are knurled such as (maybe) the handle of your 1/2 drive rachet wrench. Typically, this is a cross hatch pattern that is rolled into steel. This differs from cutting threads as this removes metal. The rolling method of knurling does not remove metal but rather "raises" bumps of it up. The rachet handle example is on the OD while knurling a valve guide is on the ID. Knurling a guide will reduce the effective diameter of the hole and the guide will have to be resized (drilled out) to allow the valve stem to fit. Better oil control...I don't know.

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