[ihc] Knurling

[John Hofstetter <hofs@xxxxxxxxxxxx>]

On Aug 19, 2004, at 6:13 AM, Ryan Moore wrote:

> I thought one of you "more experienced" types would realize this, but
> still... no one has explained what it means to "knurl" a piston.  Thus,
> those of us who are not as experienced may have no clue what you 
> people are
> talking abotu.
>
> -Ryan
Following up on Jim A's very good explanation, if you looked at a 
knurled piston the skirts would be covered with raised sharp 
protuberances, much like the handle on a tool might have. Maglite 
flashlights have a lot of knurling on them,I suppose to enable law 
enforcement to identify what officer's flashlight put the knurling 
marks on the bad guy's head. The knurling tool itself, consists of a 
couple of rollers with teeth on them that impress the 
metal-to-be-knurled with its design.

I've done a lot of knurling on my lathe, but I BELIEVE that the Perfect 
Circle System used a special machine to do the knurling. I ASSUME that 
it was a lathe, but specialized for that purpose, much as is a brake 
lathe.

John

John Hofstetter
Ol' Saline
www.goldrush.com/~hofs