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ISO Canti boss fixture

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ISO Canti boss fixture

Old 10-26-23, 06:02 PM
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ISO Canti boss fixture

Any chance someone on this forum has a canti boss fixture to sell?

I have a customer who would like them brazed on his frame. I'm someone who trusts the methods and tools, and generally don't consider myself a tool builder.

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Old 10-28-23, 11:55 AM
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For a one-off job, it doesn't need to be fancy. A strip of steel with some holes or a slot and a couple M6 bolts. Take your time lining things up and it'll be fine.

N.B. the extensions on the bolts aren't strictly needed, if you're patient enough to let things cool down before you try to remove them. And don't forget to braze the post to the base (usually it is just staked in place and can work loose over time) and braze the seams on the base.
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Old 10-28-23, 12:06 PM
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I have a fixture just like that. Right down to the hand cut slot. It works really well. I now have an Anvil, and I'm not fully convinced that it works any better. At least with the hand-made piece of steel, you know you have to be really careful. The anvil has an annoying amount of slop. I keep thinking about fixing it, but so far I'm just living with it.
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Old 10-31-23, 05:53 PM
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Hereís my home-grown canti boss fixture. A length of steel angle ďironĒ, machined flat on one side, with a long slot. Itís fairly thick so quite substantial. I use a piece of stainless rack strut for a spring clip, got one bent for fork blades and another bent for seatstays, flexing them to suit different diameters. Been using this for 30 years, canít remember where the angle iron came from. Simple but effective.

Mark Beaver
Tamarack Cycles
Halifax, NS
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Old 11-06-23, 03:32 AM
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I actually just eyeball them. Stand the fork upright and mark the legs with a sharpie using a laser level. Lie it on its back and put the bosses on. Easy to check they are level with a square on the table pointing upwards. Hold them there with a "third hand" and TIG tack. Check it's all good and that you have the spacing you want between them. But it does make sense to bolt something flat across the top as others have suggested.
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