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Posted by David Sherman on Sunday, August 02, 2009 at 11:07:19 :
In Reply to: Re: WTF? 1/2-16 thread posted by Glen Idaho on Sunday, August 02, 2009 at 01:47:29 :
If I run a 1/2-13 tap through, I'll be left with a chewed up mess that won't hold. But you gave me a good idea. Maybe there's room to drill and tap 1/2-13 holes near the existing holes so I can use all-thread or the rods that came with it.
I ran into 1/2-12 once on an old (1890s) lumber planer I rebuilt, but that was understandable because back then, Whitworth was a popular thread series. Whitworth is the same pitch as UNC for all the other diameters on that planer except for 1/2. The only problem there is some recent owner had succeeded in forcing 1/2-13 bolts part way into some of the 1/2-12 holes. For that, I just made my own bolts since I only needed a few.