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How long is too long? MarkVII

#237677 by LanternMan » Sat Aug 12, 2017 5:57 pm

One of my friends gave me his Mark VII so my wife can make some wood projects. He cautioned me about oiling the machine regularly, and not to leave it running too long.
I have read some previous posts about the cam melting and I'm scared to death of breaking or melting the cam on this machine. I have cleaned and oiled it and it seems to be working as designed.
My question is can it run for 30 min? 10 min. ? or and hour? how about using the lathe function it could run for quite a bit during a turning operation.

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Re: How long is too long? MarkVII

#237685 by JPG » Sat Aug 12, 2017 8:41 pm

This is my 'opinion', so take it for what it is worth.

I think that with adequate lubrication, the inner race and 'fork' will not get sufficiently hot to melt the cam.

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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: How long is too long? MarkVII

#237689 by robinson46176 » Sat Aug 12, 2017 10:02 pm

JPG wrote:This is my 'opinion', so take it for what it is worth.

I think that with adequate lubrication, the inner race and 'fork' will not get sufficiently hot to melt the cam.



A couple of times now I have tipped my old Mark VII up to the left and put a small pool of oil in on the tiny bearing and left it sitting that way a day or two and the oil goes down some. It is staying quiet. I have also ran the unit at slow speed a minute while tipped up and the oil standing there.
I think we discussed doing that some time back?
I have not really been using it much at all but I want to keep it lubed there. It is supposed to be my semi-dedicated dado machine but I'm not getting in a lot of shop time now. :rolleyes: Maybe more this winter.
I do have a spare cam but hope I never need it... :rolleyes:



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farmer
Francis Robinson
I did not equip with Shopsmiths in spite of the setups but because of them.
1 1988 - Mark V 510 (bought new), 4 Poly vee 1 1/8th HP Mark V's, Mark VII, 1 Mark V Mini, 1 Frankensmith, 1 10-ER, 1 Mark V Push-me-Pull-me Drillpress, SS bandsaw, belt sander, jointer, jigsaw, shaper attach, mortising attach, TS-3650 Rigid tablesaw, RAS, 6" long bed jointer, Foley/Belsaw Planer/molder/ripsaw, 1" sander, oscillating spindle/belt sander, Scroll saw, Woodmizer sawmill

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Re: How long is too long? MarkVII

#237700 by JPG » Sun Aug 13, 2017 5:53 pm

Bill Mayo recommended generous oiling of the control sheave(in fast position), raising to drill press and letting the oil seep into the bearing. I think that a good idea for the VII as well.

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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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