23733Re: OT Taps
- Dec 1, 2012On Saturday 01 December 2012 07:53:29 jestartech@... wrote:
> this sounds so simple I think I missed something:Hi,
> you have a set of taps for manual thread cutting,
> these are 3 pass, and they are not necesarilly for
> ss, because taps for ss are also different material.
> I have sets up to M24, I don't know how else I would
> cut an M24 by hands except in 3 passes (big heims
> holding swingarm to my frame are M24 :). sad thing
> about them is, when you brake one marked with rings,
> first or second pass, you leave them on a shelf and wait
> till you brake some other in another set so you have
> a set again because you can buy only single pass
> which is the same geometry as the final pass in 3 set,
> and first and second you can't buy separate ;)
> if you have regular one pass taps, you can use
> first and second pass as help for manual cuts.
You do as the factory does, start with the final cut tap and grind it back on
the leading threads.Can be done by hand providing you make & use a suitable
jig so that each of the 3 -4 cutting sections are ground back equally.
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