Accusize Industrial Tools Annular Cutter Arbor, R8 to 3/4'' Weldon Shank with Coolant System for Drill Use Annular Cutter on on Bridgeport Milling Machine, Mc18-0034

I have a collection of annular cutters from when I had access to a former shop mate’s magnetic drill. My new shop mates have a JET milling drilling machine with an R-8 collet that they let me use, so I started looking for an R-8 collet to 3/4” weldon shank adapter. There are a few available, but this one seemed to be the only that had (or at least specified) a built-in spring for the pilot. And… it works great!The only issue — and not much of one — is that the spring-loaded part of the collet takes up some room within the collet, so when I tighten the draw bar to hold the collet/adapter, the draw bar bottoms out within it before the collet is seated. That’s easily remedied (temporarily at least) with a 1/2” +/- stack of 3/8” (I think) washers at the top of the draw bar. Long term, I’ll probably order a shorter draw bar, or if not available, I’ll get another of the same and cut a half inch off of it.This thing should work great for anyone who wants to use 3/4” weldon shank annular cutters on a milling and/or drilling machine that uses an R-8 collet.

Product was perfect....fit nicely into my Jet mill....also the weldon shanks fit into the arbor...nicely....spring for ejecting plug seems farely stout...should eject plugs easily...5*s Can easily make coolant adaptor if desired, piece of brass...two o-rings...and a 1.25" snap ring

No detectable runout, quick changing cutters. I highly recommend.

Threads start down in the tool 1/4” further than any other r8, so I had to make a new bolt

I use it on my Jet Mill JDM-18. It fit perfectly in the Mill.Now I can use my Evolution Annular Cutter (round drill bits) on the Mill, which Mill does a perfect and easy job versus the Magnetic drill that I was using before having the Mill.FYI. (My worry was that, previously I bought an R8 Collet set and some of the Collets did not fit this Mill and were useless). But this Adaptor fits perfectly.

Fit in my mill and now enabled to use annular cutters in the mill. Nice!

Threads were too deep to work with my Bridgeport clone R8 system, only engaging about 1/2 thread. Other than that it worked well.

This tool worked perfectly. I will be recommending this tool to all my friends I wish I would have spotted this a year ago.

No nesecitas tener un taladro magnetico