****** - Verified Buyer
4.5
Ima go ahead a say this now. At 32 dollars when i pick it up this was a great deal. I installed it on a very old drill press i got at a garage sale. Chuck was rusted solid and so i set out for a replacement after disassembly and cleaning of all it parts. I measured the qwill taper and it was closest to jt6 so i looked for a chuck and this was the second cheapest option. Install went great and i check the run out it was +/- .0001". For a drill press from 1982 made in taiwan and a keyless chuck from china i cannot ask for more out of the set up. I should say that this chuck is solid metal. Hefty but the operation is smooth.If i had to id buy it againDo not buy this chuck. It was advertised as having a Total Indicated Runout (TIR) when mounted to a taper of .0028". I installed this chuck using the proper Jacobs taper in my Lagun vertical mill, and could visually see the center drill orbiting the center mark on the part. The TIR on this chuck was .011". I decided to see where the runout problem occured in the setup. The Lagun quill measured TIR of .0001". I mounted the Jacobs #6 taper to ½" straight shank arbor into the quill using a ½" R8 collet. TIR on the ½" shank was .0001"; TIR on the taper was .001" in two locations (top and bottom). I then installed the chuck onto the arbor. The TIR on the chuck was .011" measured in two locations (top and bottom). I installed a ⅜" diameter drill rod into the chuck and measured the TIR on the drill rod. The TIR of the drill rod was .011" measured in two locations (top and bottom). It appears that the chuck's taper was ground .010" off of the chuck centerline as the TIR error remained constant throughout the various measurement checks. How that error could pass the company's Quality Control is beyond me. I've never seen anything like it.Less than 0.002" runout. My South Bend 14" drill press spindle has that much runout so anything less than 0.002 would mean that the spindle and the chuck were cancelling each other out. Very pleased, and will be even more pleased when I replace the spindle bearings!...but , that may not always be a good thing.The problem is trying to quickly fit a different drill bit into the chuck. The precision is to such a degree that there is little if any chamfering on the chuck jaws. Absolutely , the drill bits are held securely and run true , but the ergonomics of trying to fit the drill bit into the chuck is annoying. I find it difficult to hit the exact center of the open jaws when I mount another bit. If I open the jaws twice as far as needed , the bit goes easily in. But then I find the jaws don't close symetrically on the bit and I must start over.Overall a great product, my boyfriend used it on a cheap wood lathe, works like it should, good deal.The chuck was received on time and when I open the box the chuck was all black and did not match the pictured on the webpage. When I ask if the picture need to be upgraded I was told the picture was correct. The run out on the chuck was greater than specified in the description. The received chuck did not match the description or meet my requirements. So it was returned.It is A drill chuck, it works, runout is minimal and yoi do not need a key.Adjustment ring has enough runout to vibrate to a distracting degree when in use. Not impressed.great quality chuck
