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Re: Conical sanding disk usefulness

#264956 by gac5ss » Sun Nov 24, 2019 5:58 pm

I need an opinion on acceptable run out on my conical disk that Stew and I agreed to swap. As an after thought, I decided to check the run out using my dial gauge. Since I have not used the disk in any way since purchasing it used.

The run out on it is 19 thousandths at 180 degees. My flat disk run out is 10 thousandths. I checked my quill shaft run out and it is 1 thousandth.

Just to insure that I am not sending a defective disk to Stew, Is this run out within acceptable norms? We are planning to drop them in the mail tomorrow.

Thanks,

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Jerry
Harrison, AR
Shopsmith Mk V 500, 520
SPT's: 6x48 sander, Strip sander, jointer, band saw, speed increaser

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Re: Conical sanding disk usefulness

#264963 by JPG » Sun Nov 24, 2019 11:48 pm

Those numbers are meaningless without also including the distance out from the center.

I do not think those numbers are excessive for the intended purpose of the disks if at the periphery.

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╟JPG ╢
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Goldie(Bought New SN 377425)/4" jointer/6" beltsander/12" planer/stripsander/bandsaw/powerstation /Scroll saw/Jig saw /Craftsman 10" ras/Craftsman 6" thicknessplaner/ Dayton10"tablesaw(restoredfromneighborstrashpile)/ Mark VII restoration in 'progress'/ 10E(SN E3779) restoration in progress, a 510 on the back burner and a growing pile of items to be eventually returned to useful life. - aka Red Grange

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Re: Conical sanding disk usefulness

#264971 by gac5ss » Mon Nov 25, 2019 8:04 am

JPG wrote:Those numbers are meaningless without also including the distance out from the center.

I do not think those numbers are excessive for the intended purpose of the disks if at the periphery.


The measurement was taken on the perimeter face of the disk. Thanks for your help.

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Jerry
Harrison, AR
Shopsmith Mk V 500, 520
SPT's: 6x48 sander, Strip sander, jointer, band saw, speed increaser

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Re: Conical sanding disk usefulness

#265144 by reible » Sun Dec 01, 2019 4:51 pm

I just used my conical disk to finish these blocks:

blocks.jpg
blocks.jpg (134.65 KiB) Viewed 12142 times


The one with the letters was done by hand and was a prototype but with that many to do it was easier to do some power sanding.

I cut them just a little over sized then sanded all 6 sides so they are all uniform and sanded. I think the fine paper for these is 150 grit, anyway I forgot to write the grit on the disk but it is the fine paper.

Ed

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{Knight of the Shopsmith} [Hero's don't wear capes, they wear dog tags]

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Re: Conical sanding disk usefulness

#265351 by tucsonguy » Tue Dec 10, 2019 9:28 pm

The conical disk offers a level of precision that allows grinding metal surfaces. Not just jointer knives - but here's an example;
I bought some standard aluminum bar stock which I wanted to precision grind to fit in the miter slot.
I just set up the conical disk with sandpaper, then started slowly grinding the edge (and flipping it to do the other edge with each pass). With each pass, I lowered the table (using the precision adjusting ring SS sells) and in a short time I had a 3 ft length of precision ground metal that will slide along the miter slot perfectly.
The conical disk is really the only thing that gives you that level of precision, whether you need it for really find sanding of difficult wood, or grinding or edging metal.

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Re: Conical sanding disk usefulness

#265360 by Gene Howe » Wed Dec 11, 2019 7:40 am

Thanks, guys. A file it is. Simple ways for a simple guy.

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Re: Conical sanding disk usefulness

#265362 by Bruce » Wed Dec 11, 2019 8:53 am

Has anyone tried cutting your owned conical disk sandpaper from a sheet for the flat disk? I don't imagine it would be difficult if you have an old piece to use as a template.

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Re: Conical sanding disk usefulness

#265387 by JPG » Wed Dec 11, 2019 10:17 pm

You need some fairly rugged backing.

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╔═══╗
╟JPG ╢
╚═══╝

Goldie(Bought New SN 377425)/4" jointer/6" beltsander/12" planer/stripsander/bandsaw/powerstation /Scroll saw/Jig saw /Craftsman 10" ras/Craftsman 6" thicknessplaner/ Dayton10"tablesaw(restoredfromneighborstrashpile)/ Mark VII restoration in 'progress'/ 10E(SN E3779) restoration in progress, a 510 on the back burner and a growing pile of items to be eventually returned to useful life. - aka Red Grange

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