PhillipM
Cast Iron
- Joined
- Aug 19, 2008
- Location
- Rotherham, UK
Never used a form tap before, but I've got a job that would benefit from them so have ordered a dozen OSG taps, as my existing suppliers don't stock forming taps, 1/2-20 UNF, what size drill should I be using with these, as the initial hole needs to be larger IIRC, and I don't have an OSG catalogue.
Cheers.
Cheers.