R8 Shank for Boring Head

The draw bar threading matched my machine’s M12 spec exactly, so no adapter was needed—just screwed right on. It’s got that solid, snug feel when you tighten it down, which I appreciate for the price.

The 7/8" x 20 head threading was a perfect fit for my boring head, and the steel feels sturdy enough for repeated use in my mill. Installation was smooth with no wobble after tightening.

The M12 draw bar threading lined up with my mill's spindle on the first try, no fussing or forcing. The 7/8" x 20 head side seated cleanly against my boring head, and the whole setup runs true. Exactly what I needed for the 84630.