Originally Posted by
Craig Ryan
See post #19. There's no magic and old school hearths to using pins these days. Look at Richard's flickr site and it's very clear. Pins work great if you're doing lugs.
Craig
Yeah I was referring to older frames with pins. I have a Legnano with pins, I'm pretty sure it was hearth-brazed.
By the way I always wondered why those hearths were used in the first place. The OA process was well developed by 1915. Tradition from before that perhaps.
Looking at the Flickr it seems the lugs are pre-drilled, then the tubes drilled in the fixture? Without it the chatter from the drill might disturb the mitre & alignment? One day I'll try and see, surely it can be done without a jig.