ean Posted April 14, 2017 Report Share Posted April 14, 2017 Vitesse Con 2L. The thread in one of the holes(?) on the bell housing to retain the clutch slave cylinder has been stripped (not quilty) I have a Clarke RAD-2 right angle attachment and a 210mm long drill bit and, combined, their total length means that I might have to remove the shift mechanism to get the drill in to bore out the hole to fit a helicoil. Which is a bit of a pain. The drill diameter is 21/64, is it possible to get a shorter drill bit, say half the length. This would allow the combined pieces to fit in the space, between the housing and the shift mechanism, to allow a straight drill into the bell housing hole. As an extreme measure I could cut a bit of the current drill bit but the owner would not be to chuffed about that. Any advice would be appreciated. Link to comment Share on other sites More sharing options...
Pete Lewis Posted April 14, 2017 Report Share Posted April 14, 2017 have you considered a self threading bolt to work probably need to go to 8mm metric or even tap it 8mm metric and fit a normal 8mm setscrew see it that will hold ..it saves the angle access problem bit of a bodge but can be successful. Pete Link to comment Share on other sites More sharing options...
ean Posted April 15, 2017 Author Report Share Posted April 15, 2017 Like the idea of a self tap bolt BUT I assume the bolt will be steel and then being forced, to a certain extent, into aluminium the two different metals are very likely to weld togther and difficult to remove at a later date? Taping an 8mm new tthread might be better. Thanks for the comments, though. Iain Link to comment Share on other sites More sharing options...
Pete Lewis Posted April 15, 2017 Report Share Posted April 15, 2017 we used thread cutting bolts on battery leads into chassis frames , never tried on alloy, but reckon it wold work ok https://www.orbitalfasteners.co.uk/en/categories/taptite-alternative-screws pete 1 Link to comment Share on other sites More sharing options...
dave.vitesse Posted April 15, 2017 Report Share Posted April 15, 2017 Should work with a course thread and the right size bolt. Just careful, careful! Not just strip out but too large a bolt may crack the metal. Dave Link to comment Share on other sites More sharing options...
68vitesse Posted April 16, 2017 Report Share Posted April 16, 2017 Have you checked to see if there is still thread below the stripped portion? a longer bolt or a length of studding with a nut would then work. You can get stub drills. https://www.cromwell.co.uk/shop/cutting-tools/stub-drills-hss-uncoated-and-coated/39150901 Regards Paul 1 Link to comment Share on other sites More sharing options...
GT6M Posted April 16, 2017 Report Share Posted April 16, 2017 Tap it wider wid a metric 9 MM 1.50r a 10 MM 1.5 or a 3/8th UNC or WHIT thee,s if taper taps,will fit in wid oot needing being drilled goingtoo deep, then the threads can come thru the other end let water / moisture in, and it seizes, been there fun it oot And, use a wee bit of thread lok, then ye no gotta tighten as much, and it wont come loose M Link to comment Share on other sites More sharing options...
ean Posted April 18, 2017 Author Report Share Posted April 18, 2017 Gents Thanks for all the advice, a lot to work through and consider the best route. Paul - yes and no, the thread is all gone. Thanks for the website for the stubb bit Dave - note your comment on over sizing the bolt Iain Link to comment Share on other sites More sharing options...
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