John Morrison Posted April 5 Report Share Posted April 5 Hi all, can anyone tell me the thread and pilot hole diameter required to drill and tap a blank top cover to convert to O/D inhibitor switches? Cheers John. Quote Link to post Share on other sites
stuart Posted April 5 Report Share Posted April 5 Its 5/8x13TPI and 9/16" drill which I do have. Stuart. Quote Link to post Share on other sites
John Morrison Posted April 5 Author Report Share Posted April 5 Magic Stuart thanks as always John Quote Link to post Share on other sites
stuart Posted April 5 Report Share Posted April 5 34 minutes ago, John Morrison said: Magic Stuart thanks as always John You might find it difficult to obtain the tap thats all as its an odd size. Stuart. Quote Link to post Share on other sites
Lebro Posted April 5 Report Share Posted April 5 M16 X 2 is very close & I have a feeling that repro switches might be that thread anyway. Bob Quote Link to post Share on other sites
stuart Posted April 5 Report Share Posted April 5 1 hour ago, Lebro said: M16 X 2 is very close & I have a feeling that repro switches might be that thread anyway. Bob Its a fairly coarse thread so thats probably how they still fit. Stuart. Quote Link to post Share on other sites
Andrew W Posted April 5 Report Share Posted April 5 I use an M16x2 taper tap but don’t go full depth as it makes the fit a bit sloppy. Quote Link to post Share on other sites
stuart Posted April 6 Report Share Posted April 6 17 hours ago, Andrew W said: I use an M16x2 taper tap but don’t go full depth as it makes the fit a bit sloppy. Hence why I use the correct 13TPI tap. Stuart. Quote Link to post Share on other sites
Lebro Posted April 6 Report Share Posted April 6 Pretty sure that when I bought a new switch inorder to add 2nd gear overdrive capability to my T2000 gearbox that it would not screw into the original threaded hole ( I swapped the switches around- can't remember why!) So opened up with the metric tap. Bob Quote Link to post Share on other sites
stuart Posted April 6 Report Share Posted April 6 58 minutes ago, Lebro said: Pretty sure that when I bought a new switch inorder to add 2nd gear overdrive capability to my T2000 gearbox that it would not screw into the original threaded hole ( I swapped the switches around- can't remember why!) So opened up with the metric tap. Bob Odd as Ive not had that problem fitting new switches in existing holes. Mind Im a bit loathe to use new ones as theyre not particularly good quality Stuart. Quote Link to post Share on other sites
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