Boyce MotoMeter Mounting Nuts & Fine Screw Threads
- Thread starter Capt Quahog
- Start date
BILL WILLIAMSON
Well-known member
GEEZ, wish I could find a small Bench Lathe, with enough tooling to HURT myself!
Bill W.
Bill W.
John Duden
Well-known member
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
john
Terry NJ
Well-known member
Wish I could find about 18"X 6-8 Clausing Colchester or Monark at a price I could live with!
Terry
Terry
Mark W.
Senior Member
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...
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
Well-known member
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
!
Terry
!
John Duden
Well-known member
Tap came into today, should get them made tommorow!
Capt Quahog
Senior Member
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-known member
Tom Wesenberg
Well-known member
John, you keep up that nice machine work, and you will mess up the meaning of "farmer fix".
5window
Well-known member
Terry NJ
Well-known member
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
Terry
Mark W.
Senior Member
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
Well-known member
Capt Quahog
Senior Member
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!
I can't wait until he starts whittling out new counter balanced cranks
walt jones
Senior Member
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,
Cheers,