HRT 210 rotory table chuck

[Kool Parts]

Well the time has finaly come, I need a chuck for the 210. I would like a set though so it can be indicated in. What is everybody using, and is anybody using the setup from Haas themselves?
Gary

[HuFlungDung]

I used a regular 3 jaw scroll chuck on my HRT310. I also wanted to be able to zero it in easily. So here is what I did: the rotary has 6 T-slots in it. I used three of them to fasten the chuck onto the table with.
Next, I made some special 2 piece T nuts for the other three T slots. One part of the 2 piece nut is simply a filler or spacer to slide all the way down the T slot, to provide a flat end to the T slot so that I could push against it with a setscrew.

The other half of the 2 piece nut is the sliding nut. It has a radially positioned hole through the length of it, in other words, as though the allen socket setscrew were laying down in the T slot, with the tip towards the center of the rotary table. This provides the "pusher effect". This special T nut has a slightly raised boss which sticks up about 1/8 inch above the rotary table surface. This boss will catch hold the inside of the chuck body mounting surface, kind of hook style.

So, the setup is to place the chuck on the rotary table, with the 3 capscrews only slightly snugged up. Then, using the 3 pusher T nuts, I can zero the runout of the chuck jaws. Finally, tighten down the 3 capscrews which pass through the chuck and go to work.

[Geof]

I use a nice six jaw chuck with top mount reversible jaws from KBC Tools. It does not have through holes for mounting so I had to make custom clamps. Rough truing I do with a 2" mandrel, fine truing by the old fashioned bang it on the high side with a soft hammer. Less sophisticated than Hu's but it works.

The top mount jaws are handy because you can machine your own custom soft jaws. The six jaws are handy because it is possible to either take the jaws out or leave the top part off and clamp with 2, 3, 4 or 6 jaws depending on the shape of your part.

[miljnor]

nice fixture idea hu!

Ingenuity at its finest!

I am going to rip your idea off man, gota love it!

[HuFlungDung]

Be my guest, Michael

It sure makes it easy to recenter the chuck, even when holding a 500 lb part.

[Kool Parts]

HuFlungDung,
Nice idea! you should be selling those
Gary