size check for adaptor.

[mick70Participant @mick70]

looking at getting the warco rotary table mentioned in another thread.

it's a 2mt center on it , want to make adaptor to use my southbend chucks on it.

Arc sell a 40mm blank end arbor which is tad over 1.5".

should be ok for job shouldn't it?

[mick70Participant @mick70]

[John HaineParticipant @johnhaine32865]

I don't think that it's a very good idea to mount a chuck (on a backplate presumably?) on an MT2 adapter into a rotary table. You will find I think that the amount of headroom you lose under your milling chuck is too great. Also, you will need to be careful abount direction of milling to avoid unscrewing the chuck from the adapter. Finally, for milling you'll need to make sure the MT2 is locked with a drawbar, which may make it difficult to use the RT horizontal.

Best to avoid the height taken up by the adapter itself and the backplate, and bolt your 4-jaw directly to tee-nuts in the table slots. Also using the 4-jaw you can accurately centre things on the table.

I have an HV6 table, seems OK, not from Warco, don't have the dividing plate gizmos. I've drilled and tapped some M10 holes in the table to clamp down my 4-jaw, and have a little centering gadget which is a disc that fits the central bore of the chuck on an MT2 taper – makes it very quick to mount the chuck central. I have to say that I almost never use the table, but I do have a little CNC mill and digital dividing head.

[Chris Evans 6Participant @chrisevans6]

I have a 5" three jaw mounted to a rectangular back plate about 5/8" thick. It bolts quickly to the rotary table, I usually put a 1/2" HSS tool bit blank in the collet and nip the jaws around it this positions the chuck close enough for most jobs without clocking up. The same back plate bolts directly to the mill table and also fits in the machine vice.

[mick70Participant @mick70]

fairdos will do it that way.

ta

[BazyleParticipant @bazyle]

RDG do a MT2 to Boxford thread for this purpose. I'm not sure if the SB 60 degree thread goes onto a Boxford 55 degree thread. Other way round doesn't work.

[EmgeeParticipant @emgee]

Chris

I think you forgot to mention the spigot on the backplate that locates the plate and hence 3j chuck on the centre of the rotary table ? I think most of the older/experienced operators use the same centering method for a lot of the jobs.

Emgee

[SillyOldDufferModerator @sillyoldduffer]

Spending naughtyboy's money, Warco sell a chuck and backplate to fit the Rotary Table. The backplate locates with the RT centre hole and is held in place with T-Nuts. The chuck sits on a ring on the backplate and is screwed to it with 3 Allen bolts. The Allen bolts are worked very conveniently from the front of the chuck.

This system is very quick to set up. The downside is that the chuck can't be moved between RT and Lathe, which would be useful now and again. My ever growing 'to-do' list includes 'make a backplate for the lathe' but I need someone to bully me.

Dave

[EmgeeParticipant @emgee]

Hi Dave, hurry up with that backplate so you can then do a second op on the part with absolute concentricity when set on your rotary table under the mill spindle.

Emgee

[SillyOldDufferModerator @sillyoldduffer]

Posted by Emgee on 02/12/2016 15:21:30:

Hi Dave, hurry up with that backplate so you can then do a second op on the part with absolute concentricity when set on your rotary table under the mill spindle.

Emgee

The Great One has spoken. I obey!

Thanks,

Dave

[JonParticipant @jon]

Locating off that MT2 would require clocking up every time for any accuracy.

Warco plate is solid so limited to depth of chuck to hold parts.

[EmgeeParticipant @emgee]

Locating off that MT2 would require clocking up every time for any accuracy.

Warco plate is solid so limited to depth of chuck to hold parts.

Jon

Not if the MT2 was plugged with a truly centered spigot extending above the table to locate a centre hole in the square plate that the chuck is centered on and attached to, only the spigot extends above the table top surface.

If the spigot and MT2 adaptor are drilled through small diameter parts (say up to 10mm) could extend as far as the mill table.

Emgee

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