help needed, remove drill press spindle pulley

[flemrasm]

Hi, in my thread http://www.garagejournal.com/forum/showthread.php?t=304323 im facing a problem when needing to remove the belt pulley of the spindle end, when I remove the spindle I can see that the pulley has threading on the inside, how do I get it off, is it threaded on, or can I use a 3 jaw puller to pull it off, the make of the drill press is Danish, HJ maskinfabrik, it closed down in 1971, so I haven't been able to find any manuals.. what do you think??




reg
Flemming

 

[uart]

With the belt removed, if you rotate the pulley and look in from the side, can you see any setscrews in the side of any of the pulleys? That's how the pulleys have been secured with the DPs I've seen.

 

[G_P]

There is likely a set screw that aligns with the keyway cut in the shaft. Remove the screw and then a puller should get it off. Penetrating oil will also help greatly.
Just be careful not to bend the pulley.

 

[flemrasm]

Hi folks, thanks for your answers, no set screw to be seen, im thinking it might be tapered I well get a hold of a puller and try
Reg flemming

 

[jakemac]

Be VERY CAREFUL with the puller. That old cast metal can be brittle.

 

[flemrasm]

Be VERY CAREFUL with the puller. That old cast metal can be brittle.

Are there any tricks, can i put a piece of iron under the pulleyto avoid breaking it?
flemming

 

[jakemac]

I haven't done it myself, I've just seen the aftermath.
It would make sense to make a plate to pull against. That way you're spreading the stress across the bottom of the pulley instead of just at the grab points. You would still need to be careful so that you don't deform the pulley at the axis. Slow and steady is better than quick and fast.

See if you can pull the key out of the slot and rotate the pulley on the spindle before you start. That way you'll know if something is holding it in place, or if it's just stuck.

 

[ttpete]

Is the small center shaft the quill? Does it move up and down with the chuck?

You said that the pulley is threaded inside. Those two holes in the top may be for a pin spanner. What I'm thinking is that the pulley is running on a ball bearing and that the piece with the holes in it unscrews to release the pulley. Don't use force until you figure out what those threads are for.

 

[Alchymist]

Run a wire down that key slot in the shaft to see if there is a key in the pulley. If there is, it doesn't screw off. If the wire goes past the bottom of the pulley, it possibly might screw off.

 

[pcmeiners]

Is the small center shaft the quill? Does it move up and down with the chuck?

You said that the pulley is threaded inside. Those two holes in the top may be for a pin spanner. What I'm thinking is that the pulley is running on a ball bearing and that the piece with the holes in it unscrews to release the pulley. Don't use force until you figure out what those threads are for.

Agree, carefully look at the pulley V grooves, does it look split at any of the Vs?. Bet you remove the upper half by unscrewing, the lower part depends on the key to keep it from revolving, probably the lower part pull easily once the top of the pulley is unscrewed. You likely need Liquid Wrench or equivalent. You will need to design a spanner, adjustable spanners are fairly expensive. If this is so I would also bet the threads are fine, so if you have a puller on the entire pulley you might damage the threads.

 

[fury9]

might be a c-clip holding it on from above the handle spindle. You'd have to take all that apart then look up inside.

 

[Dagny]

Bearing splitter is handy for preventing pulley damage.

 

[larry_g]

Is the small center shaft the quill? Does it move up and down with the chuck?

You said that the pulley is threaded inside. Those two holes in the top may be for a pin spanner. What I'm thinking is that the pulley is running on a ball bearing and that the piece with the holes in it unscrews to release the pulley. Don't use force until you figure out what those threads are for.

I'm with ttpete here. Look down those two holes and see if there is a pair of holes in the nut below. Probe down the hole with a round rod and feel if you can catch a fastener below if you cannot see.

Do you have the spindle out? If so spin the pulley and feel the bearings. If they feel good then no real reason to remove the pulley.

lg
no neat sig line