SOHC.co.uk Forums > CB500/550
UK 500 fixer upper
Bryanj:
Start with very small drill and work up, if you can get it central you may be able to rescue the thread when you get to 5mm. Forget easyout, when you break it spark erosion is the only way
mickandsej:
Day off the bike today, but my eBay tank arrived and I’m surprised how quick it got here and how good it is, very pleased at just £46 delivered. Having a play with an electrolysis rig overnight, see what happens...
Sent from my iPhone using Tapatalk
philward:
--- Quote from: Bryanj on July 06, 2020, 09:45:22 AM ---Start with very small drill and work up, if you can get it central you may be able to rescue the thread when you get to 5mm. Forget easyout, when you break it spark erosion is the only way
--- End quote ---
Plus 1 with easyout, learned in my early biking years (the hard way!) that a hardened (and hence brittle) easyout is more likely to snap in the stud than move the stud - to get suffient girth of the easyout to grip, the easyout will push the remaining (undrilled wall of the stud) into the head resulting in expanding it into the surrounding ali head. If its snapped just below the surface, you have opportunity to use a 6mm OD bush as a means of centreing the initial pilot drill - giving you a better chance of ending up with just threads left when you get to a 5mm drill.
philward:
--- Quote from: mickandsej on July 06, 2020, 08:25:50 PM ---Day off the bike today, but my eBay tank arrived and I’m surprised how quick it got here and how good it is, very pleased at just £46 delivered. Having a play with an electrolysis rig overnight, see what happens...
Thats a good £46 worth!
Sent from my iPhone using Tapatalk
--- End quote ---
K2-K6:
For drilling a stud it may be more accurate to use something like this in the link, just an example as you can buy different sizes.
https://www.ebay.co.uk/i/233581584549?chn=ps&norover=1&mkevt=1&mkrid=710-134428-41853-0&mkcid=2&itemid=233581584549&targetid=908661474856&device=t&mktype=pla&googleloc=9045911&poi=&campaignid=10204056441&mkgroupid=107296324212&rlsatarget=pla-908661474856&abcId=1145987&merchantid=7318514&gclid=EAIaIQobChMI_7q8i9m56gIVFuDtCh32qQf4EAsYCSABEgIHVPD_BwE
When drilling with successive larger sizes of drill (starting small and stepping up) each next larger drill has no centering to guide it, the flutes usually grab one side of the bore and make it very difficult to hold it centrally. With one of these if you can access the stud with it, then it will usually stay straight.
Cutting speed at 4mm in mild steel should be about 2000 rpm (from memory) so you need to spin it fast and use low pressure to let it lead you straight.
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version