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View Full Version : My random thinking on a rainy day...



madcaster
07-29-2009, 03:39 PM
Well,time on my hands,so here I am thinking,why not make an extra Star sizer nose punch and on a lathe drill it to center it all up,and using Lyman nose punches...

HeavyMetal
07-29-2009, 09:46 PM
A good idea on paper in reality I think you'll only create tolerance stacking by adding that many pins and hole to line up.

This is why nose sizing make so much more sense: flat nose punch against flat boolit base equals square contact equals straight entry into sizing die!

Win Win and you don't have to figure out how to cut the wierd theads on the star nose punch!

madcaster
07-29-2009, 09:54 PM
they're 1/X27...[smilie=1::coffee:

Lloyd Smale
07-30-2009, 06:52 AM
with a pin that long you may run out of ajustment too.

Bret4207
07-30-2009, 08:19 AM
they're 1/X27...[smilie=1::coffee:

What? 1-27, 12-27?

cajun shooter
07-30-2009, 08:37 AM
That's the thread pitch for a Star. Some machine's will not cut it. 27 threads per inch They did it that way so that not everyone could make and sell the punch.

dragonrider
07-30-2009, 08:49 AM
1/2"x27

cajun shooter
07-30-2009, 09:08 AM
I guess that I should have taken more than one year of machinist school. Sorry not enough caffine in the pumps yet.

deltaenterprizes
07-30-2009, 10:42 AM
1/2-27 was a popular thread in the 30s when the Star was developed and 27 tpi is still used for 3/8 pipe threads. I am able to cut that pitch on my lathe by manipulating gears and setting the lathe to cut pitches with a factor of 9. 27 is 1.5 times 18 tpi, so by putting a 1/3 smaller gear on the leadscrew it makes the lathe cut 27 tpi.
The dies on a Star reloading press are really strange also 11/16''-24 and have to be cut undersized by .010''.

madcaster
07-30-2009, 10:54 AM
I think it would be so much easier to redo the nosepunch threaded hole to something more common,but I am NOT about to take the chance if messing up my Star!Things may get out of alignment!

dragonrider
07-30-2009, 11:53 AM
When I make punches for my Star I use 12L14 material, soft as poo. When threading I use a die I got from MSC or McMaster-Carr, whichever was the least expensive. Might take as long as 60 seconds to get it done.