[TheForge] Krause/Nazel type air hammer

Sun Dec 8 08:04:00 2002

Hmm, I think I was thinking slave cylinders when I wrote this.. never mind
I guess sleep does help
L Brown :-)

At 11:13 PM 12/7/2002 -0500, you wrote:
>The pressure is held in the brake cylinders by the little pistons, the 
>rubber parts are to keep out the dust.
>L Brown
>
>At 10:50 AM 12/7/2002 -0500, you wrote:
>>Steve;
>>
>>    I haven't seen the plans for the valve, so I'm shooting in the
>>dark, BUT, a brake master cylinder certainly produces higher pressures
>>than this using "rubber" cups.   Of course they are Buna N or neoprene
>>or something better than rubber but they hold up under a lot of
>>pressure in a medium that does not compress.  Seems like the same set
>>up if kept properly oiled would work,  pressure on the back side of
>>the cup would bleed through.       I think... Anyone?
>>
>>       Jeff   ><>
>>
>>
>> > This seems like the hardest part to most of us.
>> > Why not make the fit a tiny bit less exact (maybe to 0.001") and
>>fill
>> > the gaps with grease? I think the pressure is only around 50 psi.
>> > Inelegant, but it should work fine.
>> > As an alternate idea, how about plastic seals? Can you use a plastic
>> > that gives a bit and bore the plastic out a little undersize, then
>>push
>> > the valve center into it?
>>
>>
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