Shopsmith Saw Arbor Set Screw (222458)

dusty · Post by **dusty** » Wed Jun 18, 2014 9:49 am

The Shopsmith Saw Arbor should be out fitted with a 1/4" flat point set screw (222458).

If a longer set screw is used, does this increase the propensity for the set screw to work loose?

I so wish that questions like this could be directed to the engineering staff at Shopsmith.

polycarp · Post by **polycarp** » Wed Jun 18, 2014 11:21 am

I can't answer that question with any certainty but i wonder how safe it would be using a longer set screw there?

JPG · Post by **JPG** » Wed Jun 18, 2014 11:56 am

One thing I am certain of is that the excess length outside the arbor threads do nothing to help.

However you would be assured of having as much as possible in thar.

As mentioned it would be prudent to have as little as possible protruding.

As a 'suggestion', grind one too long so it sits flush to minimally proud. The miter gauge with the SS tool kit in the stop gauge holes makes a good jig for grinding a square end against a sanding disk.

No I do not want to get into a discussion re the shaft taper here!:D But if that is bothersome(love that 'medical' term[them folks are the only ones I have heard use it]), grind with the miter gauge set to that angle and rotate the tool kit.

dusty · Post by **dusty** » Wed Jun 18, 2014 12:02 pm

Let me repeat the question.

If a longer set screw is used (as an arbor set screw), does this increase the propensity for the set screw to work loose?

charlese · Post by **charlese** » Wed Jun 18, 2014 12:15 pm

I thought your question was answered! Do you have the answer? Was this a trick question?

JPG · Post by **JPG** » Wed Jun 18, 2014 12:25 pm

dusty wrote:Let me repeat the question.

If a longer set screw is used (as an arbor set screw), does this increase the propensity for the set screw to work loose?

OK! Guilty! Missed 'increase'! Since your previous concerns re set screw involved retention, I totally missed that subtle directional alteration!

Only thing I can come up with is, it depends upon what it snags on. I do not think flying in the breeze will cause it to work loose. I do not think increased centrifugal force due to increased mass will either. Increased mass may alter any sympathetic vibration, but that is pretty far fetched.

Nor do I think it will help other than that already stated above.

Gene Howe · Post by **Gene Howe** » Wed Jun 18, 2014 12:26 pm

OK, I'll answer.
No.

polycarp · Post by **polycarp** » Wed Jun 18, 2014 12:29 pm

Is this just a matter of curiosity or is there a problem needing to be solved with the arbor?

JPG · Post by **JPG** » Wed Jun 18, 2014 12:46 pm

polycarp wrote:Is this just a matter of curiosity or is there a problem needing to be solved with the arbor?

Only the sha . . er . . ah . . Dusty knows!

Dusty has gone broke replacing saw arbor screws.

No that is not snarky, just bending the truth slightly!;)

He and I differ greatly as to the significance of this. I have yet to replace a set screw because it worked loose.

dusty · Post by **dusty** » Wed Jun 18, 2014 12:52 pm

charlese wrote:I thought your question was answered! Do you have the answer? Was this a trick question?

If my question was answered, I missed it. What is the answer?

No, this is not a trick question. It is a real honest to goodness question.

If a longer set screw is used, does this increase the propensity for the set screw to work loose?