thispartisrequired Posted March 22, 2011 Report Share Posted March 22, 2011 So what will touch it, I know a grinder will, as will water-jet etc. but will a dremel hit it? I gotta enlarge a hole up to 19mm, so yeah, whats your thoughts I know this forum has a penchant for modified/custom parts so I reckon there must be some opinions on here Cheers Sam Quote Link to comment Share on other sites More sharing options...
AdamR28 Posted March 22, 2011 Report Share Posted March 22, 2011 I gotta enlarge a hole up to 19mm, so yeah, whats your thoughts From what size? What item is it? How deep is the hole? Quote Link to comment Share on other sites More sharing options...
thispartisrequired Posted March 22, 2011 Author Report Share Posted March 22, 2011 Right the bit to machine is like 3-4 mm thick, the hole is 16mm dia, its a non sealed BB cup. cheers Quote Link to comment Share on other sites More sharing options...
monkeyseemonkeydo Posted March 22, 2011 Report Share Posted March 22, 2011 19mm drill (and a 17.5mm or similar if you're feeling nice) and coolant/lubricating fluid... Dremel probably isn't really up to it, or at least it will take you ages to get there. Quote Link to comment Share on other sites More sharing options...
AdamR28 Posted March 22, 2011 Report Share Posted March 22, 2011 Yeha a good quality drill bit should do the job I'd have thought... Quote Link to comment Share on other sites More sharing options...
thispartisrequired Posted March 22, 2011 Author Report Share Posted March 22, 2011 How would you suggest clamping the part when I drill it? I can get the use of a pillar drill but I don't want to damage the threads, thats the bit I have a plan for Quote Link to comment Share on other sites More sharing options...
Revolver Posted March 22, 2011 Report Share Posted March 22, 2011 Cut a wooden block, make a hole big enough for your part, cut it in half, cut a little bit off each side so there's a gap, and clamp in that. The wood will squish and grip in the threads without destroying your shit. Quote Link to comment Share on other sites More sharing options...
thispartisrequired Posted March 22, 2011 Author Report Share Posted March 22, 2011 Cheers, I'll post up some pics of the finished idea. Hopefully it'll make use of some spare parts (including a whole bike). Quote Link to comment Share on other sites More sharing options...
thispartisrequired Posted March 22, 2011 Author Report Share Posted March 22, 2011 (edited) went for a dig in the parts pile, found a bb cup with the right size hole in, result, no blunted drill bits for me Thanks again for the advice though Edited March 22, 2011 by thispartisrequired Quote Link to comment Share on other sites More sharing options...
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