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| BillTodd:
--- Quote ---Could any of you offer tips on getting the cross drilling right as the hole needs to be perpendicular to the two outside bolts. Theres a lot of metal to remove but I have a 1" diameter end mill and a boring head, so there are plenty of options. --- End quote --- Bolt them to a right anlge plate or similar fixture I thought handle bars were 7/8" ? --- Quote ---Also I need to put some ridges inside the hole for the handlebars to grip against, again any suggestions please? --- End quote --- If making them a few thou" small doesn't get you enough grip, you could either pin them (as most of the jap bikes I owned did) or... If you need to knurl them: mount a straight knurl wheel to the end of a rod, mount the rod in your boring head and knurl the inside hole in the same fixture you used to bore the holes. Bill |
| MadNick:
Thanks Bill, These are 1" diameter bars. Japanese (and most british) bikes generally have the 7/8" diameter size. Nick |
| MadNick:
Evening, Well its been a busy evening - As you know the next step was to cross-drill the hole for the handlebars. I pre-drilled a couple of holes and then went in with a 1" slot drill which pretty much maxed the mill out - I used loads of fluid, half the cutting speed of steel and went for it. I ended up with these - Luckily I seem to have got my numbers right and there was no intrusion on the passageways for the clamp bolts. Pretty good. Now I need to mill some flat sides to make a feature of the handlebard hole. I ended up with these - I just ran outside to check my measurements again. Both holes are the same distance from the bottom face of the clamps. Heres what they look like roughly fitted - I am pleased with these. The next step is to use a slitting saw to slice them apart so they actually clamp up when the handlebars are shoved between them. A good evenings work despite a couple of heart stoppers. Also I realised that I managed to do what I wanted with what I had even though I ordered more tooling this morning. Nick |
| DaveH:
Good job Nick, :thumbup: :clap: In the home workshop the cutting speed for steel is what works for you. Half speed, quarter speed if it works nicely then that is the correct cutting speed. Nearly always slower is better. :) :) :) :beer: DaveH |
| MadNick:
Thanks for your support Dave. Always learning despite setbacks and heartache, I love my hooby! Nick |
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