Boyce MotoMeter Mounting Nuts & Fine Screw Threads

[redmodelt]

Read my 7:57 am post above.

[BILL WILLIAMSON]

GEEZ, wish I could find a small Bench Lathe, with enough tooling to HURT myself!
Bill W.

[redmodelt]

Bill:
I just got one of those (Craftsman 109) and it's hurting my pocket book!

[John Duden]

ill be making about 10 or 15 of these nuts as soon as i get the tap, had to order one the size is kinda hard to come by
john

[Terry, NJ]

Wish I could find about 18"X 6-8 Clausing Colchester or Monark at a price I could live with!
Terry

Originally Posted by BILL WILLIAMSON

GEEZ, wish I could find a small Bench Lathe, with enough tooling to HURT myself!
Bill W.

[Mark W.]

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This might sound "nuts" but I took some brass 5/16-18 heavy-hex Jam nuts, used a standard metric tap that was real close to the Boyce threads, annealed the brass nuts to make them a bit more pliable, and then ran them onto a junk Moto-meter to get the fit perfect using some very fine abrasive compound.

It does require a lathe, but once set up you can pop out a few dozen really fast, and they seem to disappear when other guys in the club found out about them...

[Terry, NJ]

Really! If you can find an 11 mm (.437 - .440) dia X 1.0 TPI pitch. it will probably work. The nut is about 3/16 thick or about 4-5 turns. If you figure a 1mm pitch is about 25 TPI and we're looking for 27 TPI. On a nut 3/16 thick, that's barely an interference. If the nut were 1" thick, it would jam. A little fine lapping compound and a few turns up and down the thread and I think it will indistuinguable from an original
Terry


!

Originally Posted by Mark W.

This might sound "nuts" but I took some brass 5/16-18 heavy-hex Jam nuts, used a standard metric tap that was real close to the Boyce threads, annealed the brass nuts to make them a bit more pliable, and then ran them onto a junk Moto-meter to get the fit perfect using some very fine abrasive compound.

It does require a lathe, but once set up you can pop out a few dozen really fast, and they seem to disappear when other guys in the club found out about them...

[John Duden]

Tap came into today, should get them made tommorow!

[Capt Quahog]

Tap came into today, should get them made tommorow!

Holy Moly . . . you're fast!

In the meantime, I mounted an expedition to investigate the electrical related parts. Rumor had it that the nuts for lamp fixtures were the same size. Upon investigation, non of the electrical component nuts would fit the original Boyce Moto-Meter.

So . . . if possible, I could also use five or six correct thread nuts.

[John Duden]

well i got them made

[Tom Wesenberg]

John, you keep up that nice machine work, and you will mess up the meaning of "farmer fix".

[5window]

Originally Posted by John Duden

well i got them made

I predict you're going to have to make a lot more!

[Terry, NJ]

They look nice!

[Terry, NJ]

The thread size of electrical threaded tubing is 1/8 x 27 Straight pipe. Not that hard to get, I have several brass ones myself. This thread is 7/16 X 27. It's a odd ball, very rarely used. Honestly, I never heard of it and I've been playing around machinery most of my life and I sort of collect weird taps and dies. This one eluded me.
Terry

Originally Posted by Capt Quahog

Holy Moly . . . you're fast!

In the meantime, I mounted an expedition to investigate the electrical related parts. Rumor had it that the nuts for lamp fixtures were the same size. Upon investigation, non of the electrical component nuts would fit the original Boyce Moto-Meter.

So . . . if possible, I could also use five or six correct thread nuts.

[Mark W.]

Originally Posted by Terry, NJ

Really! If you can find an 11 mm (.437 - .440) dia X 1.0 TPI pitch. it will probably work. The nut is about 3/16 thick or about 4-5 turns. If you figure a 1mm pitch is about 25 TPI and we're looking for 27 TPI. On a nut 3/16 thick, that's barely an interference. If the nut were 1" thick, it would jam. A little fine lapping compound and a few turns up and down the thread and I think it will indistuinguable from an original
Terry


!

Took me a while to find the tap, but that is what I used. The original nuts that I have were only 1/8 to 3/16 thick so it does work. Any thicker than that and your interference is too much.

[John Duden]

Originally Posted by Mark W.

Took me a while to find the tap, but that is what I used. The original nuts that I have were only 1/8 to 3/16 thick so it does work. Any thicker than that and your interference is too much.

but now there are correct ones made

[Mark W.]

At $3.00 plus shipping ($4.00 on eBay) I'll keep making my own...

[Capt Quahog]

At $3.00 plus shipping ($4.00 on eBay) I'll keep making my own...

Four bucks on eBay? Where's this?

John D. looks to have solved the elusive oddball Moto-Meter nut quandary. At this point, all this nut discussion is starting to make me nuttier that I already was before going off my nut

Nuts!

[Bob-A]

I think $3 a piece from John is a bargin. I ordered three of them from him. I can't wait until he starts whittling out new counter balanced cranks
and cams.....LOL!

Bob-A

[walt jones]

I was told years ago that the threads on the Motometer were Whitworth threads but have not checed this out. Maybe some reserch is do here. Dont mean to confuse the issue further just relating what I was told.

Cheers,