I was using my 4th and it started acting up. I thought it slipped into neutral. I tuned it all off. I put the motor in neutral and I took the locks off and I cant move the table. I'm stumped. The table is very tight. Motor is fine, main worm gear is fine as it spins while in neutral. when engaged I can put a wrench on the end and it will turn but very tight.
I took the preload adjustment nut off and it still is very tight. Is there any way to remove the table?
I have an 8 in 4th axes on my mill and use it for most of my work. My mill is an early 3 digit SN so there is a lot of time on the rotary table. There was a problem with it lousing steps about 2 months ago. The table was quite tight after the worm was disengaged.
After the table was taken apart it was found that there was gummy coolant residue in the baring end opposite of the table face. This was probably caused by not getting enough oil in the oiling point on the edge of the table, the source for lubrication for that baring. I now oil that point and then force it in with some air.
See the instruction book at
This will show how it goes together. I removed the worm screw, the two locking levers on the side of the table and then the nut on the bottom of the table. The table was pressed out with not much force and cleaned, oiled and reassembled.
It is working well now.