|Bryan Cedar 1||29/08/2021 18:01:47|
|82 forum posts|
I have just purchased a Soba 6" HV6 rotary table As my needs do not justify a Vertex version. I wish to use my existing Myford 3 and 4 jaw chucks with this table. I can buy a MT2 adaptor to take the Myford chucks but think there will be a problem with them becoming unscrewed when milling, may be OK for drilling.
Is there any way to overcome this issue?
|John P||29/08/2021 18:13:01|
|339 forum posts|
My Myford chuck is mounted in a similar way on a screwed
|old mart||29/08/2021 18:15:36|
|3349 forum posts|
I have seen adaptors which bolt down to the RT and have the Myford thread on them, three bolt and four bolt on ebay. Climb milling with small cuts is not likely to unscrew the chuck.
Edited By old mart on 29/08/2021 18:20:11
|282 forum posts|
This occurs when milling on the outside, and the Chuck will loosed. For pockets the Chuck is tightened
1 obtain opposite helix mills. Difficult to find and expensive Reverse motor
2 use straight sided silver steel endmills like d bits. Reverse run
3 drill through backplate register and fit a decent sized grub screw Dimple into the Mount. Or, fit a pin
4 make up a fitting which is bolted to the table going under the backplate and pressing hard against the Chuck fixing bolt , or fit a hockey stick shaped one into a cavity in the back of the Chuck if there is one fir chucks without backplate
this is a problem on my big dividing head when set vertical. Solutions above not possible, so constant pressure needed on the Chuck key to resist any tendency to resist any movement
this is why the horizontal spindle on either dividing head or rotary table is best in this situation.
like you I look forward to seeing other people’s solutions!
|Bryan Cedar 1||29/08/2021 19:02:52|
|82 forum posts|
Re my need to use Myford chucks on my new Soba HV 6 rotary table. I forgot to mention that the mill will not run in reverse and the chucks are direct mounted without back plates. I can buy a MT2 to Myford thread arbor as the center of table is provided with a MT2 socket but wonder if this is rugged enough to hold a 4 or 6 inch chuck?
|duncan webster||29/08/2021 20:33:20|
|3526 forum posts|
If the chuck is smaller than the table, I'd make up a fitting to go the the table centre with a spigot to locate the chuck, but no thread, then have long tee bolts to hold the chuck down
If nothing else this will be stiffer.
|Howard Lewis||30/08/2021 10:34:26|
|5348 forum posts|
John P's Tee nut and hose clip idea sounds to be a good idea
Possible variation on this theme, if the table is larger than the chuck, secure an angle bracket to the table with a tee nut, and make a tapping into the chuck body which can be used to clamp it via a short slot in the angle bracket?.
Haven't tried this, but another job to go on the Round Tuit!
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