R8 to 3/4'' Weldon Shank Arbor for Milling Machine. R8 Shank with 7/16β-20 drawbar size. For Drill Use Annular Cutter s on Drill Press;. Fit with Any Size Annular Cutters which Have 3/4'' Weldon Shank.
as the name says - it worked fine for a while and i was very happy. After about 12+ holes I noticed that the crown of the ring started to wobble. I put the bit in a 3/4 R8 collet and bit travel was fine. So there's what happened to the accusize r8 3/4" Weldon tool holder. It's coming back.
Used on my jet mill JDM-18. It is ideal for the mill. I can now use my Evolution core drill (round drill) on the mill which does a great and easy job compared to the magnetic drill I used before buying the mill. (I was concerned that I had previously purchased a set of R8 collets and some of the collets did not fit this mill and were unusable). But this adapter fits perfectly.
I am generous with three stars because there are two issues with this product. The rear diameter of the product was over 0.0025" and did not fit the nib of my Bridgeport mill. After taking some time to understand the issue by comparing my working R8 collets and looking online to determine what the R8 collet should measure, I found that the product was not manufactured correctly. Luckily, I was able to grind the back of the adapter to R8 specs and use the product. After fitting the adapter to my