Loose Mark 7 Carriage Assembly

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KCollins
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Joined: Thu Sep 12, 2019 1:50 pm

Loose Mark 7 Carriage Assembly

Post by KCollins »

I have the Mark 7 and am just getting into using it on a semi regular basis. The other day when I was using the drill press I was using a forstner bit and was having to apply some noticeable pressure to make my cuts. After about the third cut I noticed my depth had shallowed. After a considerable amount of investigation as to why, I discovered my Carriage is sliding down the way tubes. The lever that locks my Carriage isn't tight enough. Is there a way to easily adjust the tension on that lock? At first inspection and review of the Exploded Parts View it looks like you can't. But the parts view isn't very detailed. Any guidance would be greatly appreciated guys.

Thanks

Kevin
Kevin Collins

1x Mark 7 - 520
2x Mark 5 - 510
1x 1956 Mark 5 - 500 in need of restoration
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JPG
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Location: Lexington, Ky (TAMECAT territory)

Re: Loose Mark 7 Carriage Assembly

Post by JPG »

On the back side of the carriage is a nut at the end of the lock shaft. Give it a 1/8 turn to tighten. Repeat if needed.
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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'/ 10
E[/size](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
KCollins
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Posts: 178
Joined: Thu Sep 12, 2019 1:50 pm

Re: Loose Mark 7 Carriage Assembly

Post by KCollins »

JPG wrote: Tue Jul 04, 2023 11:46 am On the back side of the carriage is a nut at the end of the lock shaft. Give it a 1/8 turn to tighten. Repeat if needed.
So that nut will turn and if turned will tighten things up? Seems easy enough.
Kevin Collins

1x Mark 7 - 520
2x Mark 5 - 510
1x 1956 Mark 5 - 500 in need of restoration
KCollins
Gold Member
Posts: 178
Joined: Thu Sep 12, 2019 1:50 pm

Re: Loose Mark 7 Carriage Assembly

Post by KCollins »

That tightened up nicely JPG thanks.
Kevin Collins

1x Mark 7 - 520
2x Mark 5 - 510
1x 1956 Mark 5 - 500 in need of restoration
Matanuska
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Location: Dallas, Texas

Re: Loose Mark 7 Carriage Assembly

Post by Matanuska »

You may also want to consider installing the adjustable telescoping legs on each side of the table when set up in drill press mode. Even if the table doesn't slide when drilling, it will deflect under pressure without the legs.
- Matanuska

1984 Mark V upgraded to 520 PowerPro. Shopsmith cast iron table bandsaw, jointer, belt sander, and 60's vintage 610 jigsaw SPT's. Makita 2040 15" planer, JessEm Mast-R-Lift II router table.
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