Re: Mounting lathe chuck on rotary table
Sorry I didn't respond sooner to your question.
The MT 3 to straight spindle that I made does extend above the
backplate as shown in the backplate photo because I approximated the
length and it was longer than needed. Also, since I did not make the
hole in the center of the backplate large enough to remove the
spindle, it just stays there. I could enlarge the hole in the
backplate and make a new spindle that then could be removed. When I
make a new backplate for my new 6" chuck I will probably do that.
--- In mill_drill@y..., "jcgerb" <j.c.gerber@t...> wrote:
> I have a Vortex 6.1/2" which I use with 4", 5", 6" and 8" chucks.
What is the purpose of the extended small tip on "backplate 1 and 2" ?
> How do you remove the MT2 or 3 without hurting it while fixed on
the cross-table ? It has been sometimes a problem here ?
> Jean-Claude, Switzerland
> ----- Original Message -----
> From: philteague
> To: mill_drill@y...
> Sent: Thursday, May 09, 2002 9:19 PM
> Subject: [mill_drill] Mounting lathe chuck on rotary table
> I have uploaded a series of photos in the photo section on
> lathe chuck on my new 8" rotary table.
> The rotary table was purchased from JTS for $210. I did not get
> indexing plates or the center with it. It is well finished and
> smoothly. It weighs 66lbs which, although, not too heavy for me
> pick up, is awkward for me to grab hold of especially on the left
> hand end. This makes it more difficult to handle while
> on the mill table.
> I read several posts on the RCM newgroup on mounting a lathe
> a rotary table. The idea of using a spindle that would fit the MT
> hole in the table with the other end to match the backplate
> like a good idea. The only problem I had with the idea was that I
> never attempted to turn a Morse taper. This did not prove to be
> difficult as I thought.
> Before I started on the spindle, however, I mounted a piece of
> 5.75" in diameter and 1" thick ($8.00) in a 4 jaw chuck that I
> on both sides. I used a small center drill (#1 or 2) to mark the
> center of the plate and scribed a line correspinding to diameter
> the inside of the chuck recess and a second line as a guide to
> indicate the bolt hole circle of the chuck mounting holes. Note
> the first two photos that I made two sets of holes to mount two
> different chucks, a 3 jaw and a 4 jaw (both are 4" diameter).
> was necessary because the 3 jaw required 3 holes while the 4 jaw
> 4 holes. I machined the backplate with a raised part to match the
> recess in the chucks (both chucks had the same diameter recess).
> I then bored a hole .75" in diameter in the center of the
> I used 6061 aluminum for the spindle because I didn't have a
> steel the right size. I turned the spindle to fit the hole in the
> backplate on one end and then I turned the MT 3 on the other end.
> any one needs any help with that I can provide that in a separate
> post. The spindle aligns the backplate (see backplate2.jpg)on the
> table and I use a center (a spring loaded type used for tapping)
> the chuck to align the rotary table and backplate under the
> You can use a zero set and DTI to do this more accurately, if
> needed. The chuck mounts on the backplate and is aligned using
> raised are on the backplate (see chuck.jpg).
> I was pleased with the backplate. Having the rotary table made
> drilling the holes so much simpler. This is my second backplate.
> first one was to mount the 4 jaw chuck on my lathe. I got it to
> but, it was much more tedious and required a certain amount of
> I have a 6" 3 jaw chuck on order which I may make a backplate to
> on the rotary table now that I feel fairly confident I can do it.
> Phil Teague