Mounting a large grinding wheel

[Woods_Wanderer]

I recently got a 10" pedestal grinder that came with a 10"x1" stone mounted on it. I removed the stone for safety when function testing the machine, but when I tested the stone and decided to reinstall it I discovered that the spindle diameter of the grinder is only 7/8" while the stone has a 1" arbor and no spacers. The mounting washers are flat-faced with no flange. When the stone was previously installed it was perfectly centered on the shaft-how was this done?

 

[Packard V8]

Any method to do the above is BAD SCIENCE! An exploding 10" stone would be akin to hand grenade going off at belly-button level.

Having said that, one could do it by loosely tightening the washers, rotating the stone by hand and checking the runout with a pencil. Where the pencil hits, tap the stone with a rubber hammer to move it until the pencil line around the stone is constant, tighten the nut and true the stone with a star wheel. Do not try this at home!

jack vines

 

[kbuhagiar]

I recently got a 10" pedestal grinder that came with a 10"x1" stone mounted on it. I removed the stone for safety when function testing the machine, but when I tested the stone and decided to reinstall it I discovered that the spindle diameter of the grinder is only 7/8" while the stone has a 1" arbor and no spacers. The mounting washers are flat-faced with no flange. When the stone was previously installed it was perfectly centered on the shaft-how was this done?

You need grinding wheel arbor reducing bushings (sized appropriately for your application) similar to these:

CGW Arbor Reducing Bushing Adapter for Bench Grinding Wheels Various Sizes | eBay

Find many great new & used options and get the best deals for CGW Arbor Reducing Bushing Adapter for Bench Grinding Wheels Various Sizes at the best online prices at eBay! Free shipping for many products!

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Any other method is risky IMHO.

 

[bob15]

Not sure how it was done, but bushings are the way to do it.

https://www.mcmaster.com/4461A502/

 

[1982fxr]

Any chance the bushings are on the floor under something right now?

 

[RTM]

Or the bushings dissolved over time? I think 1982fxr is closer to the truth in my mess. Shop.

 

[nadogail]

Could the wheel you took off be a replacement wheel?