Earl Diamond Super Heavy Duty 1/2" Drill Chuck with Chuck Key and MT2 Shank | Morse Taper Arbor #2 (B16)

Great build quality for the price. Holds bits very well the jaws close very uniformly. No runout that can be seen, it performs wonderfully.

I bought the 1/2" chuck with R8 shank to use on a Bridgeport mill. I'm using this in a low use application, not a production shop. It smoothly opens and closes across the range. I didn't notice any issues seating the tapered shank. I degreased the mating chuck taper and shank taper. I then deburred both tapers with fine stones (this probably wasn't necessary). I warmed up the chuck in the oven and put the shank in the freezer. I put the two together and quickly gave it a whack with a lead hammer. I drilled some 1/4" holes in aluminum and cold rolled steel so far. I spot drilled first with a collet and then drilled with the chuck. The old mill held under 0.002" on size, and location between holes. No complaints so far. I'll update this review if something comes up. So far I'm happy I took a chance on this affordable option.

This chuck looks good and seems to work well but I have not had a chance to use it enough to say how durable it will be.

Solid & Reliable.

I use this on my wood lathe, holds bits well, and as intended

I'm a woodworker, so do not need machinist tolerances, but as close as possible is a nice to have. My Nova Viking was not running true, to the point that drilling with a 20mm forstener bit would cause so much friction that the chuck fell off. This solved my problem. I gave it a good clean with alcohol then was pleasantly surprised to see run out within 2-3 thou, better than the advertised tolerance. I would have liked it if the minimum bit was smaller than 1/8", but I'm not sure I can remember ever using a bit that small in my drill press anyway, so better to have a chuck with low runout. Would recommend.

I used this chuck to replace the one that broke.

Not sure what some are complaining about with regard to the drill bit size. The Earl Diamond Super Heavy Duty Drill Chuck 1/2" Capacity with MT2 Morse Taper 2 Arbor & K32 Key (B16) listed here that I bought, has no problem holding pretty much any drill bit up to 13mm. Just over 1/2". Chuck indicates 0.5mm ~ 13mm.1mm is .03937". A 0.5 mm drill bit (as listed on the side of the chuck) is 0.01968 inch. Who has a drill bit smaller than that? If you did, you probably wouldn't expect a 1/2" drill chuck to make watches Just saying.These jaws almost close tight. When you hold this chuck up to the light before putting it onto the mandrel, can barely see light thru it. Very accurate and very smooth. The only complaint I had, was that I used a micro file on the tips of the three jaws in order to get rid of a very minute finishing burr. This in no way effected the fit and function of the drill chuck or what size drill it accepted. Very well made. Tight and smooth. No regrets. If I needed two, I would definitely buy another.Shoot StraightChoose Wisely

Acabo de comprar un mini-torno grizzly pero los tacaños de grizzly no me agregaron el broquero asi que tuve que comprar éste, el cual quedo a la perfeccion en mi nuevo torno, aun no lo he probado pero si se ve que es de muy buena caldad, esperemos que asi sea.

Sin problema

Good beginner chuck for the hobby machinist.

As described

Medium quality. Ok for the home owner