rstermer

Any ideas what the diameter and pitch are for the material holddown adjusting screw on a Delta P-20? My dial caliper says the diameter of the hole is 0.261", which is close to an M8 screw, but neither the fine or regular pitch M8 screw will fit. A 1/4" screw slides in and a 5/16" screw is too big. The hardware store doesn't carry 9/32" screws. Thoughts?
rstermer

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Hamlin

Hi rstermer,

Have you considered retapping the hole to accept a different sized screw? One that is more common.

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Ken

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bobj3

HI rstermer

This is what I do when I don't have the right screw for a part.

I take the part to ACE hardware, they will let you dig in the screw bins until you find the right one...unlike many stores,they don't want you to open the boxes but most of the stock they have are in pull out bins..

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Bob J.

rstermer

Yes, I'm thinking 3/8" as the 0.261" dia. hole is already larger than the minor diameter for a 5/16" screw, at least according to the table I found on the internet earlier this morning.
Regards,
RAS

rstermer

Thanks Bob, it is a little too big to do that, but I followed your idea in principle. I went over to Ace and bought one of every screw that looked like a possibility, took them home, tried them all and determined none of them would fit. So I guess the hole is stripped and I will have to drill and tap for 3/8".
As an aside, the folks at Ace were very accomodating in taking back all the stuff which did not fit. I'm certainly going to go there for all my hardware needs in the future to show my appreciation for their good customer service.
rstermer

rstermer

That worked fine. I drilled it out with a Q size drill and tapped it with a 3/8-24 tap. It now works like a charm.
rstermer

Hamlin

Hi rstermer,

Glad to hear it worked out for ya.

__________________
Ken

"A VETERAN"
"Whether active duty, retired, national guard or reserve - is someone who, at one point in their life, wrote a blank check made payable to "The United States of America", for an amount of "up to and including my life". That is HONOR, and there are way too many people in this country who no longer understand it." -Author Unknown