[HELP] Rotary Table Disassembly

[rleete]

I have a 4" rotary table, similar to this one:

   

As I was milling (admittedly pushing it), it started to slip.  Adjustment/tightening of the handwheel had no effect.  It isn't the handle slipping, which I've had in the past, so I filed a small flat for the setscrew, and that holds nicely.  So, I broke down the setup, and took it to the bench to disassemble.  I can get the handwheel and housing off, but this doesn't let me get the table off.  A screw and washer on the bottom were removed, but it's still resisting me.  

The slipping seems to be with the main worm gear and the table.  I can't see a setscrew on it to tighten.  The gear itself and the worm mesh smoothly and show no signs of damage.

The bottom shows a bearing, what appears to be a shaft and am outer ring around that.  Tapping on one or both doesn't seem to move it at all.  Do I just need to release my inner animal and hammer it out?  Is there a setscrew on the main gear to hold it to the table?

My current project is dead in the water until I get this fixed.

[Highpower]

(07-01-2023, 12:47 PM)rleete Wrote: I have a 4" rotary table, similar to this one:

https://www.youtube.com/watch?v=586fXJWiqA8

[rleete]

Okay, I must have had a brain fart.  The center shaft is part of the table itself, and the outer ring is the inner race of the bearing.  Using my HF wheel puller, I pressed the shaft out of the bearing and it all popped apart.  It actually pressed out quite easily, once I broke the bond of the dried protective grease in there.

The gear does show some wear, mostly because I've really pushed the limits of this little table.  It had no Loctite (or whatever they use in India), but it did have a tiny key.  In the picture below you can see where it went into the boss (red spot), and the key itself appears to be, of all things, a nail.  Yes, a finish nail.

   

I'll use some of my expired* loctite and pin it again, this time both sides of the gear.  And I'm even going to use a finish nail to maintain that authentic Indian sweatshop originality.  Nothing like a project in the middle of a project to make things interesting.  I guess I was short on my frustration quota this month. 
 




*The Loctite I have is retaining compound 35.  Which hasn't existed for at least two decades and is now known by #635.  It still works just fine for anything I've used it on.  It is the "you'd better be damn sure" stuff, because I've never been successful at removing a part when I've used it.

[rleete]

Thanks, Highpower. I'd already gotten it apart by the time I thought to look for a video.

[Highpower]

(07-01-2023, 02:33 PM)rleete Wrote: Thanks, Highpower.  I'd already gotten it apart by the time I thought to look for a video.

A single shear pin on a rotary table to drive it? Wow. I guess you'll really be able to put the beans to it now.

[rleete]

I put three in, 120 degrees apart.  Everything Loctited (is that a real word?), and just waiting for it to cure a bit before greasing it up and putting it back to work.

This time I'll take smaller cuts.  I guess using that Bridgeport skewed my perception of what my mill can handle.