Thread of Cyclo Benelux shifter braze-on
09-17-20, 09:30 PM
#26
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My Jack Taylor from that era uses a Simplex left shifter and French Cyclo right, and seems to take a m5x1.0 thread. If @Kilroy1988 is to be believed (seems right by my reckoning), the French Cyclo and Simplex should be the same as British Cyclo Benelux. The previous owner of my Taylor had put in a 10-24 and it was a poor fit and ruined the thread a bit, but held the shifter on.
It has a lot of 2BA bolts for holding on racks and things. I was able to use 10-32 in place of some missing 2BA bolts if the braze-on was not very deep.
It has a lot of 2BA bolts for holding on racks and things. I was able to use 10-32 in place of some missing 2BA bolts if the braze-on was not very deep.
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Owner & co-founder, Cycles René Hubris. Unfortunately attaching questionable braze-ons to perfectly good frames since about 2015. With style.
Owner & co-founder, Cycles René Hubris. Unfortunately attaching questionable braze-ons to perfectly good frames since about 2015. With style.
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09-18-20, 08:02 AM
#27
Disraeli Gears
Thread Starter
Now things are getting interesting! Thanks so much to C9H13N and scarlson and Kilroy1988. I had no idea that M5 x 1.0 metric thread ever existed -- the "metric coarse" spec is now 0.8 pitch.
Insidious C. : I'm all but certain that the thread pitch is ~1.0 mm, based on measuring 7 threads (got about 7.1 mm). I will try, but will not force, a #10-24 thread to see how sympathique it is.
I found a couple sources for M5 x 1.0 dies, though from what I can tell, they're all sourced from "Qualtech", whose location I cannot pin down. So I could (even if I had to file one down to take the die) rethread a M6 x 1.0 screw, if I can live with a bit of "no thread" near the head. That may not be a problem, because the shifter I have in mind (Simplex Retrofriction) has about a 9 mm deep circular recess beyond the square key seat, while the circular boss on the braze-on is only 6 mm deep. Those shifters project a bit more than standard friction types.
Another approach I just thought of: get some brass or steel rod of the right length, thread from one end with M5 x 1.0, and a bit from the other with M5 x 0.8, then get a couple brass hex nuts or a hex + acorn nut jammed together to act as the "screw head".
Insidious C. : I'm all but certain that the thread pitch is ~1.0 mm, based on measuring 7 threads (got about 7.1 mm). I will try, but will not force, a #10-24 thread to see how sympathique it is.
I found a couple sources for M5 x 1.0 dies, though from what I can tell, they're all sourced from "Qualtech", whose location I cannot pin down. So I could (even if I had to file one down to take the die) rethread a M6 x 1.0 screw, if I can live with a bit of "no thread" near the head. That may not be a problem, because the shifter I have in mind (Simplex Retrofriction) has about a 9 mm deep circular recess beyond the square key seat, while the circular boss on the braze-on is only 6 mm deep. Those shifters project a bit more than standard friction types.
Another approach I just thought of: get some brass or steel rod of the right length, thread from one end with M5 x 1.0, and a bit from the other with M5 x 0.8, then get a couple brass hex nuts or a hex + acorn nut jammed together to act as the "screw head".
Last edited by Charles Wahl; 09-18-20 at 11:15 AM.
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09-18-20, 10:16 AM
#28
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I've been fortunate enough to source my shifters with screws that already work for the applications at hand, but I can assure you that when the time comes I'll be returning to this thread for references!
-Gregory
-Gregory
09-18-20, 03:19 PM
#29
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Now things are getting interesting! Thanks so much to C9H13N and scarlson and Kilroy1988. I had no idea that M5 x 1.0 metric thread ever existed -- the "metric coarse" spec is now 0.8 pitch.
Insidious C. : I'm all but certain that the thread pitch is ~1.0 mm, based on measuring 7 threads (got about 7.1 mm). I will try, but will not force, a #10-24 thread to see how sympathique it is.
I found a couple sources for M5 x 1.0 dies, though from what I can tell, they're all sourced from "Qualtech", whose location I cannot pin down. So I could (even if I had to file one down to take the die) rethread a M6 x 1.0 screw, if I can live with a bit of "no thread" near the head. That may not be a problem, because the shifter I have in mind (Simplex Retrofriction) has about a 9 mm deep circular recess beyond the square key seat, while the circular boss on the braze-on is only 6 mm deep. Those shifters project a bit more than standard friction types.
Another approach I just thought of: get some brass or steel rod of the right length, thread from one end with M5 x 1.0, and a bit from the other with M5 x 0.8, then get a couple brass hex nuts or a hex + acorn nut jammed together to act as the "screw head".
Insidious C. : I'm all but certain that the thread pitch is ~1.0 mm, based on measuring 7 threads (got about 7.1 mm). I will try, but will not force, a #10-24 thread to see how sympathique it is.
I found a couple sources for M5 x 1.0 dies, though from what I can tell, they're all sourced from "Qualtech", whose location I cannot pin down. So I could (even if I had to file one down to take the die) rethread a M6 x 1.0 screw, if I can live with a bit of "no thread" near the head. That may not be a problem, because the shifter I have in mind (Simplex Retrofriction) has about a 9 mm deep circular recess beyond the square key seat, while the circular boss on the braze-on is only 6 mm deep. Those shifters project a bit more than standard friction types.
Another approach I just thought of: get some brass or steel rod of the right length, thread from one end with M5 x 1.0, and a bit from the other with M5 x 0.8, then get a couple brass hex nuts or a hex + acorn nut jammed together to act as the "screw head".
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Owner & co-founder, Cycles René Hubris. Unfortunately attaching questionable braze-ons to perfectly good frames since about 2015. With style.
Owner & co-founder, Cycles René Hubris. Unfortunately attaching questionable braze-ons to perfectly good frames since about 2015. With style.
09-18-20, 07:24 PM
#30
Disraeli Gears
Thread Starter
Unfortunately, I strongly suspect that either of these is not long enough for my particular situation: I want to install Simplex Retrofriction shifters, if possible, and those require longer screws -- I understand that I'm just being difficult now, as my spouse often reminds me. But thanks for the info, anyway.
Last edited by Charles Wahl; 09-18-20 at 07:27 PM.
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09-22-20, 12:01 AM
#32
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Good to know you at least know what you're dealing with! Let me know if you find a decent 5x1.0 die! I'm interested in one too if the price is right.
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Owner & co-founder, Cycles René Hubris. Unfortunately attaching questionable braze-ons to perfectly good frames since about 2015. With style.
Owner & co-founder, Cycles René Hubris. Unfortunately attaching questionable braze-ons to perfectly good frames since about 2015. With style.
