Re: Recommendation for tap fit hole tolerance in 4140 pre-hard steel
- From: Jim Wilkins <KB1DAL@xxxxxxxxx>
- Date: Fri, 30 Nov 2007 09:52:47 -0800 (PST)
On Nov 30, 10:07 am, Clark Magnuson <c.magnu...@xxxxxxxxxxx> wrote:
It seems to me that for a long pin, the calculation on the pin would be
bulk modulus, and the calculation on the hole would be Lame's formula.
The equilibrium between those two forces times the co efficient of
friction would give the force needed to drive in the pin.
The heat treat on the hole would make the math the same up to the point
that the hole permanently stretched. The hole when heat treated could
stretch larger and still spring back. The heat treat would then be a
good thing, if the forces are not so high that you can't get the pin in.
Whack the hole with a ball pein hammer on the exit side and let the
pin stretch it back.
.
- Follow-Ups:
- References:
- Recommendation for tap fit hole tolerance in 4140 pre-hard steel
- From: John2005
- Re: Recommendation for tap fit hole tolerance in 4140 pre-hard steel
- From: Clark Magnuson
- Re: Recommendation for tap fit hole tolerance in 4140 pre-hard steel
- From: John2005
- Re: Recommendation for tap fit hole tolerance in 4140 pre-hard steel
- From: Clark Magnuson
- Recommendation for tap fit hole tolerance in 4140 pre-hard steel
- Prev by Date: Re: Harbor Freight winch vs. McMaster winch, and wire rope
- Next by Date: Re: get rid of mercaptant
- Previous by thread: Re: Recommendation for tap fit hole tolerance in 4140 pre-hard steel
- Next by thread: Re: Recommendation for tap fit hole tolerance in 4140 pre-hard steel
- Index(es):
Relevant Pages
|
