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Re: knurling
Re: gnurling -- johnmtalley	Post Reply	Top of thread	Forum

Posted by: RandyKimball ® 01/31/2004, 18:41:11 Author Profile Mail author Edit

Knurling [what you see on a ratchet wrench handle] is called out as fine, medium or coarse, ... or .... 64, 96, 128, or 160 diametral pitch (64 being the most coarse). A 64 diametral pitch knurl would cut about .006" into the work and raise the work about .0025" (.012" into & .005" raise on the diameter). You draw a line around the dia. where the knurl starts and where it stops and use a note arrow to identify what knurl to use between the lines. I consider most ratchet handles to be a coarse knurl. Use a fine knurl to raise diameters to improve press fits. Your diameter changes will tend to be close to this chart: 64 - .012" into & .005" raise 96 - .010" into & .004" raise 128 - .008" into & .003" raise 160 - .006" into & .002" raise For handles and such a shop will set the machine to get a knurl that looks and feels best within the pitch you specify. The size of a knurl result is rarely called out at less than ±.01" per diameter unless it must fit past, into, or over another diameter. I hope this is enough to get you going. -randy- The worst suggestion of you lifetime may be the catalyst to the grandest idea of the century, never let suggestions go unsaid nor fail to listen to them. Modified by RandyKimball at Sat, Jan 31, 2004, 19:15:48

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