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Old Mark VII Parts Question

#262902 by luggw1 » Wed Sep 18, 2019 6:50 pm

I have a Shopsmith Mark VII purchased in 1964 that needs new belts. Can anyone tell me if the belts for the Mark V head will fit the old Mark VII head as well? If not is there a source for these belts? I'd hate to see this beast go to Shopsmith heaven because of such a simple problem.

Thanks
Bill Lugg

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Re: Old Mark VII Parts Question

#262906 by JPG » Wed Sep 18, 2019 8:37 pm

Although the Mark 5/V poly-v belt is narrower than the original Mark VII poly-v belt, it WILL work. Bandsaw Tire Warehouse has a belt made to Mark VII specs(wider) available on E-bay.

The motor belt is NOT the same as a Mark V/5 motor belt. However it is a 1/2" standard v-belt which I believe to be 30 1/2" long. I recommend a 'cogged' automotive belt. Since belts today are typically slightly narrower than the original belt the speed range is moved slightly upward.

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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: Old Mark VII Parts Question

#262912 by cham-ed » Wed Sep 18, 2019 9:19 pm

I ended up using a 30" belt as 1/2 sizes are VERY hard to find.

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Re: Old Mark VII Parts Question

#262913 by luggw1 » Wed Sep 18, 2019 10:02 pm

cham-ed wrote:I ended up using a 30" belt as 1/2 sizes are VERY hard to find.


Does the shorter belt change the speeds at all or is it just the belt width that affects it?

Thanks,
Bill Lugg

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Re: Old Mark VII Parts Question

#262914 by JPG » Wed Sep 18, 2019 10:08 pm

luggw1 wrote:
cham-ed wrote:I ended up using a 30" belt as 1/2 sizes are VERY hard to find.


Does the shorter belt change the speeds at all or is it just the belt width that affects it?

Thanks,
Bill Lugg


Yes it will move the speed range downward(the belt ends up further into the motor pulley for a given control sheave setting(speed dial)),

A narrow belt does the opposite. It rides further into the idler puller AND also rides further OUT on the motor pulley.

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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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Re: Old Mark VII Parts Question

#262921 by luggw1 » Thu Sep 19, 2019 9:53 am

Thanks for all the helpful info. I've purchased the appropriate belts. Now, I notice the Mark V belt comes with instructions for replacement if you buy it from Shopsmith. I know it's not a Mark VII head, but the assembly might be similar. Does anyone have a copy of those instructions they'd be willing to share digitally to help me figure out how to get that top belt replaced?

Thanks.
Bill Lugg

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Re: Old Mark VII Parts Question

#262946 by rpd » Thu Sep 19, 2019 5:41 pm

This is a link to Mark V service bulletins

http://allinonewood.com/?page=shop/serviceadvisor&PHPSESSID=nl6rl2clk94ulgc796f5erm4p5

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Ron Dyck
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10ER #23430, 10ER #84609, 10ER #94987,two SS A-34 jigsaws for 10ER.
1959 Mark 5 #356595 Greenie, SS Magna Jointer, SS planer, SS bandsaw, SS scroll saw (gray), DC3300,

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Re: Old Mark VII Parts Question

#262951 by chapmanruss » Thu Sep 19, 2019 8:17 pm

Here is a link to the Mark V belt replacement instructions from here on the Shopsmith website.

https://www.shopsmith.com/ownersite/productmanuals/PolyV_GilmerBelt_Replacement.pdf
.

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Russ

Mark V 520 S/N 09-11-01 completely upgraded to Mark 7, with all SPT's & more.
Model 10ER S/N R64000 first one I restored on bench w/ Shopsmith metal ends & retractable casters. Has Speed Changer, Model 4E Jointer, Jig Saw with lamp, a complete set of original accessories & much more.
Model 10E S/N 1077 oldest one I have restored. On bench w/ Shopsmith metal ends & retractable casters.

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