I bought one of the Grin Tech. GMAC motors for an old full suspension mountain bike frame with 51mm I.S. caliper tabs. The disc ends up being 1.5-2 mmm too far to the left (outboard). There isn't enough material to enlarge the holes on the caliper so I thinned the mount adapter by 2mm with a Dremel 115 bit. It works, but I'm sure the faces are far from parallel now, so long term I'd like to get another adapter & have it properly milled down.
There are welding and machine shops around me that do custom work, but I'm guessing this is too small a job for many of them. I'm willing to ship it to someone, too, but how to find 'em? It's not a CNC job-- I don't have the software or knowledge, really-- I just want an 11mm thick adapter milled down to 9mm.
Any ideas?
I'm in Sunnyvale, California, 94086.
I'd expect to pay about $50-$100. I'm tempted to bite the bullet & get a Sherline or Taig mill. I'd always thought I'd want a CNC one which made them kind of prohibitive, but most of my metalworking projects are simple & could be done manually, so they're under $1k with a few end mills and hold downs.
There are welding and machine shops around me that do custom work, but I'm guessing this is too small a job for many of them. I'm willing to ship it to someone, too, but how to find 'em? It's not a CNC job-- I don't have the software or knowledge, really-- I just want an 11mm thick adapter milled down to 9mm.
Any ideas?
I'm in Sunnyvale, California, 94086.
I'd expect to pay about $50-$100. I'm tempted to bite the bullet & get a Sherline or Taig mill. I'd always thought I'd want a CNC one which made them kind of prohibitive, but most of my metalworking projects are simple & could be done manually, so they're under $1k with a few end mills and hold downs.