MadModder
Gallery, Projects and General => How do I?? => Topic started by: kayzed1 on February 19, 2020, 12:22:55 PM
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i have a couple or four studs to make for a mates dad's old BSA motorcycle side car, they are 7/16 and also a couple of 3/8th BSF threads...could some find person tell me the hole size and bar size i need to do these :doh: ..much grassy arse...i can do metric but have forgotten all the stuff my dad and school taught me..
Many thanks..Lyn.
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The tapping drill sizes are:
3/8" = 8.3mm
7/16" = 9.7mm
Bar size
3/8" = 9.5mm
7/16" = 11.1mm
Hope that is the info you want Lyn.
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The attached document is written for 60° V-threaqds (though it ought to be fairly simple to recalculate "factors" for Whitworth threads -- I have never had a need to do so. -- Lew
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I cut down some bolts and just rethreaded them using a 55 degree hhs cutter it worked out fine.
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Many thanks one and all, i will do the deed tomorrow now. :thumbup:
Lyn.