Remove surface grinder wheel hub from tapered spindle, how to?

[the professor]

I am asking for a friend that got his first surface grinder. A very nice looking Reid 6 x 18
hydraulic, surplused from a university lab enviroment. It was definitely a "you suck" good deal.
He needs to know how to properly remove the grinding wheel hub from the grinder spindle.
Thanks, Larry Reiss Omaha

[JohnMartin]

I am asking for a friend that got his first surface grinder. A very nice looking Reid 6 x 18
hydraulic, surplused from a university lab enviroment. It was definitely a "you suck" good deal.
He needs to know how to properly remove the grinding wheel hub from the grinder spindle.
Thanks, Larry Reiss Omaha

The Sopko hubs are internally threaded, so that you can use a screw-in puller without removing the wheel from the hub. Others probably are as well. Sopko sell pullers for them.

If your hub is not internally threaded and there is not enough external thread for a puller to grab, you'll have to pull the wheel.

[the professor]

I looked up sopko, I bet that's what it is. Thanks

[Mark Rand]

If you haven't got the correct puller, or there aren't enough threads on the hub to screw it on (normally LH thread!), then the wheel/hub can normally be freed up from the spindle with a few light taps from the back with a hammer handle or similar, after removing the retaining nut (also normally LH thread).

[Doozer]

...the wheel/hub can normally be freed up from the spindle with a few light taps from the back with a hammer handle or similar, after removing the retaining nut (also normally LH thread).

If it is that easy to remove, there is something wrong with your tapers.

-D

[lakeside53]

Usually get asked the stuck question AFTER they have hit it with increasingly heavier hammers and tried a variety of pipe wrenches.

[rickyb]

If it is that easy to remove, there is something wrong with your tapers.

-D

Nothing wrong if that taper is non locking (greater than 7°). Being very short tapers eases things also.

[Mark Rand]

If it is that easy to remove, there is something wrong with your tapers.

-D

On My Jones & Shipman surface grinder, the taper is 15° (7.5° per side). This is a non-locking taper and will release fairly easily. A surface grinder with something like a Morse taper would be a nightmare!

[john hobdeclipe]

Most tool grinders and smaller surface grinders that use interchangeable hubs will be "Standard Taper" of 3" per foot and 1" large diameter. There are exceptions. Cincinnati Taper is different, and the hubs for Delta Rockwell "ToolMaker" grinders are different, to name a couple. Standard Taper hubs usually have threads for a puller.

But there are some imported machines that have a taper very similar to the 3" / foot, but don't use a puller. The instruction manual clearly states to remove the locking nut or bolt, then strike the end of the shaft using a brass or hardwood block.

[RB211]

So I can add Sopko hubs to my KO Lee 718?

[Doozer]

I own 4 grinders that use Sopko hubs,
and the grinders I use at work.
I stand by my assertion.

-Doozer

[john hobdeclipe]

So I can add Sopko hubs to my KO Lee 718?

You can use Standard Taper hubs, from Sopko or other manufacturers. They are readily available.

[The Metal Butcher]

Starting to cut my teeth on our new Chevalier grinder at work. Nice machine. The factory installed the wheel so tight I had to put the hub in a lathe chuck and beat the nut wrench with a hammer.

[mikey553]

Starting to cut my teeth on our new Chevalier grinder at work. Nice machine. The factory installed the wheel so tight I had to put the hub in a lathe chuck and beat the nut wrench with a hammer.

What size wheel is that? After being so tight the wheel may be cracked. Be careful with it. At the very least do the sound test.

[The Metal Butcher]

What size wheel is that? After being so tight the wheel may be cracked. Be careful with it. At the very least do the sound test.

8x1/2". The blotters were squished bad. It's not a very good wheel.