On Mon, 2003-04-21 at 11:56, grantfair2001 wrote:
Hi Darald-
Machine carbon? To a high precision fit?
As Peanuts said to Lucy, you have very high ambitious - for me <g>. I
am sure it would be beyond my skills. I am reluctant to simply take
the pump apart for fear of damaging it. It does work now, although not
as well as I would like. Where are you in Canada? I'm in Toronto; if I
can find the carbon maybe you could demonstrate in your shop?
Has anyone on the list taken one of these pumps apart and know what
steps are involved?
Grant
Greetings
If I had a shop or worked in one where I had access to equipment for
after hours work I would say no problemo!!
I worked in a shop where we made carbon bushings for pump shaft
whatevers. These were done in a size from 1" OD and 3/4" ID to 3.5" OD
and can't remember the ID on that one.
We used HSS tools with a nice sharp edge with a generous radius on the
tool tip (but not too large either just more than for steel more like
that for 660 brass) and kept the cuts light. No pushing things to make
them go fast. Also used a small (3/4") paintbrush on the tool to control
the dust as this makes a mess on the machine. Clean the machine often
and clean very very well after!!
If you do not try you will never learn. Just use very sharp drill bits
and keep the pressure down and the rpms at a good rate but not real
fast. If you can machine to bearing fits and put in an O-ring groove
inside a piece 1" in that is 0.100 wide and 0.100 deep (each side) you
DO know enough to tackle it. Just do not get in a hurry and make sure
you actually have carbon and not graphite that is in the pump!
Darald
