On 3 Jan 2011 04:55:54 GMT, "DoN. Nichols"
wrote:


Ive built a number of machines for a friend of mine, who slots PVC pipe
for the water industry.

A pair of bearing blocks and a 1" shaft will give you an arbor to stick
blades on and all you need are a pair of toothed pulleys and a
reasonable sized motor, like a 5hp @ 3600 rpm

That sounds like something which would use reasonable spindle
speeds for the task.

We are putting 4" carbide tipped slotting saws on the arbors, with
ground spacers between them..sometimes we have (30) .015 saws .125"
apart all running on an arbor at 3600 rpm.

While I think that he needs probably 0.125" saws, and spacers of
0.375" for a half inch center to center spacing. (Or do the bats prefer
closer groove spacing?)

I made up spacers of all different distances up to 2". The slot
patterns depend on what the client wants. Cut em on an automatic saw,
trim on a DV-59, hit em with a surface grinder on the ends so the blades
run true. Shrug.

I own a very small part of the business....shrug.

Its very easy to do,..it just takes some consideration of what you
actually need, calc the horsepower and build the thing.

Oh..and our saw blades can cost us $25 each....but you can get by a hell
of a lot cheaper when tooling up for wood.

Especially if you can find a batch of first time resharpened
ones. You don't want a mix of different number of resharps because the
diameters would vary too much.

Im not sure in his application thats all that negative.

Gunner

--

"You can have peace. Or you can have freedom. Don't ever count on having both at once."
Robert A. Heinlein