Weiler 56089 Die Grinder Cut-Off Wheel and Mandrel Kit Including 56490 Mandrel and 3-Inch x 1/16 Wolverine T1 Thin Wheels, A36T, 3/8 AH (1 Mandrel and 10 Cutting Discs)

Exactly what I was looking for, to hold Cut-Off Wheels for My high speed drill

More useful than I thought. Sturdy

This arbor works great. I use it for 1/16 cutting wheels. I recommend this product.

I have two of these in two different grinders. They were both (and/or my grinders collets) a bit out of whack.. One of my grinders normally runs rather smoothly. But with this mandrel chucked in it, it vibrated so bad that the cutoff discs frayed, the switch fell apart, the power leads broke off, and the case ultrasonically welded itself together in two spots. I had to tap it with a hammer to get the halves apart. After repairing the grinder, I chucked this mandrel back in and turned it true with a thick cutoff disc in another grinder while this mandrel was spinning at 25K rpm. You can easily see where the high/low spots are, due to the black finish. When theres no more black, it should be better. After making it concentric and removing a bit of unnecessary mass from the head, the vibrations went away. I also noticed the discs did not sit flat, so I took the screw out and faced the part that the bottom of the disc sits on, too, using the same method. Unfortunately, I had no way to face the bottom of the disc retaining screw in situ, but it was close enough to begin with that the discs now sit perfectly flat, and I did not need to fudge with it by, say, adding a cardboard washer or an O-ring between the disc and the retaining screw. The grinder is now super smooth and working fantastic with this mandrel. I think Im gonna dedicate this grinder to cutoff discs, changing them out only with the mandrel screw. Im afraid I might lose some smoothness/concentricity if I re-chuck the mandrel. These mandrels are made of carbon steel and the screw and threading are fine. They are solid. They are cheap enough that I would recommend them. Just have another grinder or Dremel tool handy, I think after going through this, I would true up any large mandrel in situ on any tool rotating at ridiculous RPMs, unless it were chrome plated and extremely well balanced to begin with. Its very fast and easy. Just keep both grinders oriented the same direction when you grind: tip to tip, butt to butt. If you try to 69 it, the cutting disc will just loosen, itself. This makes me wonder how reversible air grinders keep the cutting disc in place.

Had to go to go to the hardware store and buy a longer screw, because the plastic center of my sanding disk was too thick. The screw seems like its long enough to hold the thickness of sandpaper and thats about it.

These discs arrived quickly and the mandrel seems straight and of good quality, however the centers of the discs have disc material around the arbor that makes it really hard to safely tighten it down with busting the disc. I can deal with it though. The BHA discs that I bought did not have this issue.

Good to get it from here

Works exactly as it should. Have not had any issues with it.

I have used a lot of different brands of cut off wheeld and these by far are the best, will only use these from now on.

The first one I received had a significant amount of runout at the head. So much that the edge of the cutoff wheel was bouncing up/down on the work and tearing up the edge of the wheel. The replacement is a lot better and does not bounce on the work, however there is still a small amount of vibration and runout. I gave 3 stars because the price is good and the second one is usable. I also contacted manufacturer but its been many weeks and they have never responded to my message. EDIT: I believe the runout is being caused by warpage during the manufacturers heat treating process after the part is machined.