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Forum topic by Novum posted 01-26-2022 05:08 PM 240 views 0 times favorited 5 replies Add to Favorites Watch
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Novum

18 posts in 143 days


01-26-2022 05:08 PM

I have a 30+ year old bench grinder that needs a new wheel so I can sharpen lathe chisels. The current wheel to replace is a 7” x 1” x1/2” arbor. I guess I need about a 60-80 grit?

Can’t find that size anywhere. Sources? Thanks


5 replies so far

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HokieKen

21683 posts in 2590 days


#1 posted 01-26-2022 05:33 PM

I think you’ll have to go with a 6” wheel. The only wheels I know of that come in a standard 7” diameter are surface grinder wheels and they have much larger arbors. 6” bench grinders have 1/2” arbors. If your grinder is big enough, you could use an 8” wheel and use a reducer bushing to fit it to the smaller arbor.

-- I collect hobbies. There is no sense in limiting yourself (Don W) - - - - - - - - Kenny in SW VA

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xeddog

376 posts in 4458 days


#2 posted 01-26-2022 05:43 PM

One other note, if you are only going to be sharpening chisels, and not any heavy grinding or reshaping, etc. I would go with the fine grit. I have a 120 grit on my grinder and I like it. I have also read that the white stones generate less heat which can be a good thing, but they do wear down faster.

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Novum

18 posts in 143 days


#3 posted 01-26-2022 05:47 PM

Thank you. Since it is a two wheeler I will leave the other for mower blades and such. I assume there is not problem with 7” on one side and 6” on the other?

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HokieKen

21683 posts in 2590 days


#4 posted 01-26-2022 05:50 PM



Thank you. Since it is a two wheeler I will leave the other for mower blades and such. I assume there is not problem with 7” on one side and 6” on the other?

- Novum

Probably not. Provided both wheels are fairly balanced independently you probably won’t notice any appreciable increase in vibration. It’s not different than having a wire wheel on one side and grinding wheel on the other which is how a lot of manufacturers sell new grinders.

-- I collect hobbies. There is no sense in limiting yourself (Don W) - - - - - - - - Kenny in SW VA

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LesB

3457 posts in 4894 days


#5 posted 01-26-2022 05:58 PM

I agree with the finer grit and white wheel recommendations.

For mower blades and the like I find my angle grinder works much better and easier. I use the cordless Dewalt and I can even sharpen them on the mower…..especially the brush hog mower on my tractor with 1/2” thick blades.

-- Les B, Oregon

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