s2hotdog Posted October 28, 2006 Share Posted October 28, 2006 As it says interested as I'm just about to do this - and weld a 76 dia tube in for the pto bars to drive my H14 winch I'm planning to drill the hole with a tank cutter - are there any stiffening plates already welded in the cross member ? The hole will be roughly where the n/s rad support is I'm aware that it will clash with the stiffener on the back side of crossmember I'll get over that Anybody done this So I know what to expect Cheers for any replies Steve Quote Link to comment Share on other sites More sharing options...
smo Posted October 28, 2006 Share Posted October 28, 2006 Tank cutter as in trepanning cutter??? Personally i think i'd want to be using a fixed dia hole saw for this size, expecially if done in situ. Quote Link to comment Share on other sites More sharing options...
nas90 Posted October 28, 2006 Share Posted October 28, 2006 As it says interested as I'm just about to do this - and weld a 76 dia tube in for the pto bars to drive my H14 winch I'm planning to drill the hole with a tank cutter - are there any stiffening plates already welded in the cross member ? The hole will be roughly where the n/s rad support is I'm aware that it will clash with the stiffener on the back side of crossmember I'll get over that Anybody done this So I know what to expect Cheers for any replies Steve Steel erectors use a 110V drill with magnetic base and rack & pinion type slideway. It's safe, keeps the drill at 90 degrees and powerful enough to take quite large diameters. You might be able to hire from a good industrial type hire shop, or borrow from the forum? I use laser or water so can't help! Quote Link to comment Share on other sites More sharing options...
will_warne Posted October 28, 2006 Share Posted October 28, 2006 What about gas axe, then tidy up with a die grinder? Quote Link to comment Share on other sites More sharing options...
dollythelw Posted October 28, 2006 Share Posted October 28, 2006 no worries - hole saw will do it happily, theres nothing inside to worry about Quote Link to comment Share on other sites More sharing options...
green110 Posted October 28, 2006 Share Posted October 28, 2006 76mm is a big hole for a mag drill, also I find they don't stick very well to thin metal. Hole saw will be fine! G110 Quote Link to comment Share on other sites More sharing options...
Hybrid_From_Hell Posted October 28, 2006 Share Posted October 28, 2006 I did this on the hybrid, use cutting fluid (or WD40) go nice and slow, and take your time, if you can use an extra long drill so you go through both faces and this helps with the back side still being located when you have cut through the front side Nige Quote Link to comment Share on other sites More sharing options...
freeagent Posted October 28, 2006 Share Posted October 28, 2006 i don't think you'd find a cutter that big to fit a mag-drill... biggest i've seen is 50mm.... and they can have a habit of shattering... good quality holesaw will work fine, take your time and use plenty of coolant. Quote Link to comment Share on other sites More sharing options...
T1G UP Posted October 28, 2006 Share Posted October 28, 2006 pistol drill and a 76mm hole saw will fly through. Quote Link to comment Share on other sites More sharing options...
s2hotdog Posted October 28, 2006 Author Share Posted October 28, 2006 Thanks for the replies ! What I thought have access to mag drill but cross member is set at an angle ok for the front side but may be difficult for the back side Also have gas gear - messy and am waiting for a die grinder on ebay Will try hole cutter What about stengthening or will welding the tube do ok Cheers chaps Steve Quote Link to comment Share on other sites More sharing options...
Hybrid_From_Hell Posted October 29, 2006 Share Posted October 29, 2006 When I did mine (here goes for the mickey takes) I bored about an 80mm hole (biggest hole saw I had) so the U/J would fit to the back of the mech winch. I then welded in a lump of 8mm tube, and made the length slightly too long so the tube protruded afterwards. The I made some "L" shaped plates with a hole about 90mm, and then place these over the sticky out bit, and welded around the tube, the L was on the top of the crossmember 1 side, and behind and under the other. I guessed this (6mm ) would add back in at least what I had cut out or better......seemed to be fine ! Nige Quote Link to comment Share on other sites More sharing options...
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