Jaws for vice bolts

[mattylad]

You didn't ask for one! Not sure what you want though, are you going to try and size the bolt from a photo?

View attachment 254599

Well, as you never said what make/model vice it is, a photo allows us to relax our attempts at mind reading and put away our crystal balls.

 

[magicmushroom666]

The threads are in the jaws not the casting I think, and its likely that the jaws are hardened so you'll be on a hiding to nothing trying to tap new threads

 

[Burnerman]

Just coming back to the original post.....
Expect the jaws to be carbon steel - they will tap but only with an HSS tap, not the carbon ones. The cast iron will drill quite well with HSS drills.
On a typical Record vice, the jaws are floating and the threads into the casting are BSW (as they should be). On this one, its anyone's guess but it looks like it's been tampered with previously.
John

 

[bsr]

Thanks all. I will continue trying to find somewhere locally which sells Whitworth bolts and taps, rather than trying to enlarge to M8.

 

[Tigercubrider]

It would be far easier to find a decent source of bolts, or carry the jaws and source a bolt to fit.
Re tapping an undamaged thread is a waste of effort

 

[Tigercubrider]

http://www.nookysnuts.com/catalogue/fasteners/brightzincplated/nutsandbolts.html

https://acmestainless.co.uk/product-category/imperial/hex-sets/whitworth-hex-sets/?v=79cba1185463

 

[just pumps]

I dont believe the removal jaws are threaded.
Has the OP removed them from the body and sliding piece.

 

[bsr]

So it turns out they were 1/4in Whitworth. Got replacements today. Thanks for your help.