Hardware ID and replacement
11-04-22, 01:11 PM
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Hardware ID and replacement
I scrounged up some crusty Miche Primato pedals from my local Co-Op. A little polishing and new grease and balls make these nice, but I'm wondering if you mind folks can help me identify some hardware Miche chose for the bolts on what I'll call the 'toe clip fine adjustment plate'.
These pedals are using a M5 button head bolt with an unusual conical slotted circular nut. I've found a single image online from Vertex Industrial products in the UK, and that's it. What are these nuts called, and where can i find them?
Pedal model in question, regular old slotted bolt doing replacement duty.
PO used a regular nut for the regular bolt.
Bottom of pedal uses a countersunk hole for the nut
nut is slotted, round, and matches the countersunk recess in the pedal.
A better illustration of the nut. Matches ~ 10mm diameter of the M5 Bolt.
These pedals are using a M5 button head bolt with an unusual conical slotted circular nut. I've found a single image online from Vertex Industrial products in the UK, and that's it. What are these nuts called, and where can i find them?
Pedal model in question, regular old slotted bolt doing replacement duty.
PO used a regular nut for the regular bolt.
Bottom of pedal uses a countersunk hole for the nut
nut is slotted, round, and matches the countersunk recess in the pedal.
A better illustration of the nut. Matches ~ 10mm diameter of the M5 Bolt.
11-04-22, 03:10 PM
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They're conical nuts, and are typically used where precise centering is desired, ie. auto lug nuts. They are not exactly rare, but not the most common either, so selection will be limited. Also, they might be specific to these pedals, in which an exact match is unlikely except from the maker (if they're still around).
Worst case is that you have to make or modify them on your own. This isn't all that hard if you have a power drill and bench grinder (or a real machine shop).
Start with a nut of the right thread and overall thickness. Chuck a threaded rod (screw with head cut off) into your power drill, screw on the nut, and run at low rpm while holding it at the right angle against the face of the grinding wheel. I suggest using some extra nuts behind the one being ground to improve clearance and avoid grinding the drill chuck.
Worst case is that you have to make or modify them on your own. This isn't all that hard if you have a power drill and bench grinder (or a real machine shop).
Start with a nut of the right thread and overall thickness. Chuck a threaded rod (screw with head cut off) into your power drill, screw on the nut, and run at low rpm while holding it at the right angle against the face of the grinding wheel. I suggest using some extra nuts behind the one being ground to improve clearance and avoid grinding the drill chuck.
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Last edited by FBinNY; 11-04-22 at 03:19 PM.
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11-05-22, 07:42 PM
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11-05-22, 07:44 PM
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These are such an odd design choice.
11-05-22, 08:40 PM
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Andy
11-05-22, 09:06 PM
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FBinNY I think if it comes down to 'making' one, I'd start with a slotted circular nut if I could find one locally,.....
Often the key to a successful project is to use what you find, and improvise your way to what you need.
Workable in your hand, beats better in the bush.
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An ounce of diagnosis is worth a pound of cure.
Just because I'm tired of arguing, doesn't mean you're right.
“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
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FB
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An ounce of diagnosis is worth a pound of cure.
Just because I'm tired of arguing, doesn't mean you're right.
“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance.
11-06-22, 08:04 AM
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https://www.jwwinco.com/en-us/produc...RoCf0YQAvD_BwE
11-06-22, 04:18 PM
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Start with a nut of the right thread and overall thickness. Chuck a threaded rod (screw with head cut off) into your power drill, screw on the nut, and run at low rpm while holding it at the right angle against the face of the grinding wheel. I suggest using some extra nuts behind the one being ground to improve clearance and avoid grinding the drill chuck.
It would be easy enough to cut a slot in the nut before (or after) following FBinNY's suggestion. Just use a Dremel tool with a cutting disk. Steady hands!
11-06-22, 05:52 PM
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You now have a great opportunity to justify the purchase of that mini-lathe you've had your eye on.
