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Airtight motor cover for table saw?

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Forum topic by harum posted 11-21-2014 07:45 PM 1674 views 0 times favorited 15 replies Add to Favorites Watch
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harum

216 posts in 1104 days


11-21-2014 07:45 PM

Topic tags/keywords: table saw motor cover dust collection tablesaw dust collection

Thinking of making a motor cover of plywood and a plastic bin to be able to collect dust from under the blade. The original cover is missing, if there was any. Right now fine dust shoots out of the opening spreading all over the garage.

Was wondering if it would be a good idea to close the entire side with an airtight cover for efficient dust removal through a vacuum port or the motor in this model has to have access to open air for ventilation?

Any suggestion would be appreciated. Best wishes, h.

-- "If you're not counting the ripples when throwing pebbles in the water, you're wasting your time."


15 replies so far

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MrUnix

4211 posts in 1660 days


#1 posted 11-21-2014 08:03 PM

That Unisaw originally had a cover.. don’t see a problem.

See this thread: http://lumberjocks.com/topics/41518

Cheers,
Brad

-- Brad in FL - To be old and wise, you must first be young and stupid

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harum

216 posts in 1104 days


#2 posted 11-21-2014 09:04 PM

Thanks, Brad!

-- "If you're not counting the ripples when throwing pebbles in the water, you're wasting your time."

View Ron Ford's profile

Ron Ford

200 posts in 1194 days


#3 posted 11-21-2014 10:12 PM

I’d be cautious about making it too airtight. You could end up with overheating issues that would at a minimum shorten the life of the motor, and worst case cause overheating and a fire. I helped a fellow LJ’er in the area hook up a motor on a downdraft table he had built and he made it quite airtight to maximize its efficiency. That motor has a thermal overload switch and it tends to shut itself off after 10 minutes or so of running.

Perhaps you could find a picture of the original cover that appears to have been on the saw and fashion it after that.

Ron

-- Once in awhile I make something really great. Most days I just make sawdust.

View Redoak49's profile

Redoak49

1944 posts in 1450 days


#4 posted 11-21-2014 10:18 PM

You can do a search for the cat. no and delta and find the part and erplacemntparts. It is only $114.

The only issue with the plastic bin is getting it too close to the motor…it needs to be able to circulate some air.

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harum

216 posts in 1104 days


#5 posted 11-21-2014 10:32 PM

Thanks! I will try running the saw and the vacuum with my airtight cover first to see how it looks and sounds. I suspect that the dust collection system will be air-starved anyway. I will drill a few holes in the plastic bin around the motor then, which will give enough air flow. Will see if a factory cover of the right size can be found online.

-- "If you're not counting the ripples when throwing pebbles in the water, you're wasting your time."

View Bluepine38's profile

Bluepine38

3341 posts in 2547 days


#6 posted 11-22-2014 06:33 PM

I built a wooden cover for my Delta cabinet saw, and just to be safe I put a couple of holes in it where
the motor normally sets so my dust collector helps cool the motor.

-- As ever, Gus-the 77 yr young apprentice carpenter

View Fred Hargis's profile

Fred Hargis

3932 posts in 1955 days


#7 posted 11-22-2014 06:42 PM

I seriously doubt it would be air starved. I pull air through ine with a 5 HP DC connected to a 6” duct. The original motor cover is air tight (sheet metal with a foam gasket and a tight fit when closed) and my DC gets all the air it needs to keep the cabinet clean. With the openings around the top and the bottom of the cabinet along it breathes plenty good. Do pay attention to the clearance at the end of the motor, I can try to measure mine if you need it.

-- Our village hasn't lost it's idiot, he was elected to congress.

View Redoak49's profile

Redoak49

1944 posts in 1450 days


#8 posted 11-22-2014 06:53 PM

My comment about the air flow was due to how close the plastic is to the end of the motor as you need some room in that area. Otherwise it looks like a pretty good solution.

View ElChe's profile

ElChe

630 posts in 798 days


#9 posted 11-22-2014 08:14 PM

Make sure it is Tupperware. If you use any other brand you will get freezer burn.

-- Tom - Measure twice cut once. Then measure again. Curse. Fudge.

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harum

216 posts in 1104 days


#10 posted 11-23-2014 12:38 AM

Thanks for all the responses! Gus, yes, I drilled a hole in the plastic for the motor for it to get some air; when it’s on, the air is pulled in through the opening—just what’s needed. Fred, you are right, even when the motor is off there is no air-starvation with fully closed cover. Tom, who needs Tupperware when there’s Teflon: liquid nitrogen or red hot metal—no burns; it’s space age after all.

-- "If you're not counting the ripples when throwing pebbles in the water, you're wasting your time."

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6mmBR

28 posts in 797 days


#11 posted 11-25-2014 03:04 PM

And here I am trying to build a cover out of hardboard when I could just get a plastic box. Heck, it’s actually a pretty good idea. I’ll have to give it a try.

A wooden box or sheet metal box would work as well I’d imagine.

View harum's profile

harum

216 posts in 1104 days


#12 posted 11-25-2014 05:11 PM

Just make sure that the plastic box has enough width and length, so that the motor/blade can move the entire range.

-- "If you're not counting the ripples when throwing pebbles in the water, you're wasting your time."

View TheFridge's profile (online now)

TheFridge

5765 posts in 947 days


#13 posted 11-25-2014 05:16 PM

It’ll be fine.

-- Shooting down the walls of heartache. Bang bang. I am. The warrior.

View bigblockyeti's profile

bigblockyeti

3667 posts in 1182 days


#14 posted 11-25-2014 07:34 PM

I made a wood cover for mine that is only 1/8” from the back of the motor, so I cut slots in it where the motor travels so the cooling fan could draw adequate air to keep the motor from getting hot under heavy load. Making the cover so close to the back of the motor was done to maximize shelf space under the saw side table.

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harum

216 posts in 1104 days


#15 posted 11-25-2014 08:31 PM

Yes, wood, metal, plastic would work, as far as I understand. With a transparent cover one can see what’s inside without taking it off. The motor actually pulls the air in through the cover holes.

-- "If you're not counting the ripples when throwing pebbles in the water, you're wasting your time."

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