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Old 04-15-2018, 07:48 PM
old iron old iron is offline
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Default Surface grinder wheel mount

I have a 6X18 Reid surface grinder that I bought some time ago and now I have to buy a wheel mount for it as it was among the missing when I took delivery.

Pretty sure the wheel spins clockwise looking at it from the operating position, do any of the members here know if the mount should have left hand threads, or does it matter? I find both when I looked.

Thanks in advance
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Old 04-15-2018, 08:08 PM
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greywynd greywynd is offline
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When you say left versus right hand threads, you mean the nut the clamps the wheel?

Generally, most of the surface grinders I’ve ran, wheel runs clockwise, which throws the sparks to the left end of the table. The wheel ‘nut’ is left hand thread, so tightens going counterclockwise. This is to help avoid it coming undone at startup or of the wheel gets bound in something etc.

The wheel ‘hub’ though is often held to the spindle in the centre with another nut. Been a while since I touched one of them, can’t recall what hand thread they are.


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Old 04-15-2018, 08:26 PM
old iron old iron is offline
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Yes, I meant the nut that clamps the wheel. Your answer coincides with the reasoning I had come up with, thanks.

I wonder why I am finding on ebay used for sale, the right hand thread wheel clamp nut outnumber the left hand thread 10 to 1.

Thanks much for the reply, looks like I need the left hand thread mount.
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Old 04-15-2018, 09:10 PM
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Don’t forget, likely a lot of those sellers don’t know the difference.

Not sure why though if they are actually correct.


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Old 04-16-2018, 06:56 AM
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https://goo.gl/maps/8hDxBP3p8cy
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Old 04-16-2018, 09:14 AM
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Quote:
Originally Posted by old iron View Post
Yes, I meant the nut that clamps the wheel. Your answer coincides with the reasoning I had come up with, thanks.

I wonder why I am finding on ebay used for sale, the right hand thread wheel clamp nut outnumber the left hand thread 10 to 1.

Thanks much for the reply, looks like I need the left hand thread mount.
Mine is left hand thread...........
your wheel should be rotating clockwise if it rotates counter clockwise it should be right hand thread...
I believe that is correct...

You can also check it by chasing the threads with a wire thread gauge and chase the threads in and out
Or if your not in a big hurry you can put some Teflon tape on it nice and tight but covered use some JB weld paste a small sleeve over the Teflon tape let dry run it off and you will see then if its right hand or left hand Just a few things I have done to be sure of thread direction
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Last edited by MetalWolf; 04-16-2018 at 09:23 AM.
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Old 04-16-2018, 10:27 AM
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Realized later why there are also rh threads, many cylindrical grinders, and tool and cutter grinders would use them. Some tool grinders have double ended spindles, and can run either direction depending what’s being done.


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Old 04-18-2018, 06:45 PM
old iron old iron is offline
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Thanks for the reassurance of what I thought in the first place. It is always good to get second and third opinions.
I found a LH thread wheel mount on the auction site at an affordable price and it's on the way.
I may get the grinder warmed up this summer after all.
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Old 04-18-2018, 07:55 PM
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Those ads are probably placed by the heirs of the surface grinder operators that used the wrong direction nuts
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Old 04-19-2018, 09:14 PM
old iron old iron is offline
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Terry, you could be a lot more correct than you can even imagine.

I got my wheel mount today, had to make my way through the snow to the building where the surface grinder is to see if it fits and sure as the devil, fits like a glove. If I had looked at the spindle earlier, I wouldn't have had to ask the question here because, right there up close and personal is a nut to hold the wheel mount to the grinder spindle and it is LH thread also. Shoulda looked.....
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