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Grit/Dust Control

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ddickey

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#1
I have a small Sanford surface grinder that doesn't get used a lot simply because I can't stand spewing grit all around my machines. I still use it but sparingly. I also find the small work envelope to be very restrictive and would like a 6x12 but I need to figure something out for grit control. I was thinking about making a small space with something like a welding curtain to keep the grit inside.
What are your guys' solutions to control grit/dust?
 

pdentrem

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#2
Don’t be afraid to wear a mask. You will be surprised on removal how much darker it is vs a new one!

You will find that a dust collection system is the best way to go. Curtains will help a bit but the dust still gets out. With proper shrouding and pick up the dust problem can be reduced a lot. One can make a box that holds a bag filter vertically, where the inlet is at the bottom and the motor and exhaust is at the top. A shop vac could work in a pinch but they are loud and you still really need a good bag filter to stop the dust. A vertically made box the filter mouth at the bottom, will last longer as the dust will fall down into a collection tray which you can remove and clean, and this will extend the life of the filter and help reduce build up.

We use such a commercial version by Q-Air.

http://www.qair.com/industrial-air-...odular-media-dust-collector.htm?products=true

Jet makes a different style of collector as well.

http://www.jettools.com/us/en/p/jdc-501-cabinet-dust-collector-for-metal-115-230v-1ph/414700
 
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Bob Korves

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#3
You will find that a dust collection system is the best way to go. Curtains will help a bit but the dust still gets out. With proper shrouding and pick up the dust problem can be reduced a lot. One can make a box that holds a bag filter vertically, where the inlet is at the bottom and the motor and exhaust is at the top. A shop vac could work in a pinch but they are loud and you still really need a good bag filter to stop the dust. A vertically made box the filter mouth at the bottom, will last longer as the dust will fall down into a collection tray which you can remove and clean, and this will extend the life of the filter and help reduce build up.

We use such a commercial version by Q-Air.

http://www.qair.com/industrial-air-...odular-media-dust-collector.htm?products=true

Jet makes a different style of collector as well.

http://www.jettools.com/us/en/p/jdc-501-cabinet-dust-collector-for-metal-115-230v-1ph/414700
Q-air link went nowhere.
Jet link says "Not to be used with Surface Grinders"
 

Alexander McGilton

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#4
Adding coolant was a major improvement to my Harig. It dosen't stop the big particles from the sparks and still leaves a peppering on the floor around, but it reduces the lingering smell of grinder dust of the small particles.
 

pdentrem

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#5
Link works for me. The Jet one is not rated for wet ie coolant. Dry grinding should be fine as long as the filter stops the metal. It is sold as a metal dust collector.

BTW the Jet unit will give you cancer per California notice!
 

P. Waller

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#6
Flood coolant.
 

Alexander McGilton

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#7
That jet brand dust collector cost more than I have spent in my surface grinder setup. Perhaps make an expansion chamber out of steel ducting to slow the dust down to cool and have a simple shop vac at the end.
 

pdentrem

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#8
We use flood coolant on our Landis cylindrical grinder and the mist covers a fair bit of space. The average home/garage will not tolerate this.
The prebuilt systems are not cheap. The QAir system cost us several thousands! Instead I would buy the bag filter and make a box. I made one for wood dust several years ago. It needs cleaning, and likely a new filter! For a motor it uses a simple dual squirrel cage unit like what is found in larger stove top vent units. Been running over 20 years so far.
image.jpg
 

pontiac428

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#9
Dust evacuation is the engineering control most suitable for the situation. On a SG, a suitable capture vent placed on the grinding wheel guard is the best start point. After ventilation, an enclosure would be the next control. If wet methods are possible use them, too.
 

ddickey

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#11
The only other thing that shoots as much grit into the air to attack my lathe and mill is the angle grinder.
My belt grinder just shoots the grit right to the floor. I have a bench grinder but it never gets used.
 

projectnut

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#12
I made a dust collector pickup from a 2" LB conduit elbow like this:
https://www.menards.com/main/electr...093-c-9538.htm?tid=1649784214228998021&ipos=2

I cut an oval hole in the cover to open about half of the area then attached it to a bracket on the wheel housing so it could slide up and down depending on the size of the work. The pickup is attached to a dedicated shop vac. when in use. It may not meet OSHA standards, but it's been in use nearly 10 years without a problem.
DSCF8037.JPG DSCF8038.JPG
 

Ken from ontario

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#13
My belt grinder just shoots the grit right to the floor. I have a bench grinder but it never gets used.
I had the same problem with my 42" belt grinder shooting grit all over the floor, but I glued a square plastic dish right on the bottom of the lower wheel, now all I do is add water in the dish before grinding, it collects most of the grit .
 

rgray

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#14
Most of my grinding equipment went in my old office when I added on to my shop. 2 surface grinders and a tool and cutter grinder.
My cylindrical grinder is just on the other side of the wall from the office and the jig grinder just on the other side of the opposite wall and that wall will get a door and be an addition to the grinding room.
The addition for the lathes, mills, shaper, drill press, and bandsaws is 20 feet away and has just a small walk in door. So it's 2 walls away from the surface grinders and 1 wall away from the cylindrical.
The cylindrical is always run with coolant so very little dust there.

If you can wall off an area for grinders it is nice. Keeps the grit there and off other machines. Up side is you can heat the small area warmer than the rest of the shop. Downside is ventilation is pretty much required.
I have a big old shop vac that died, it has a small shop vac installed in it that I use on the surface grinder. The old vac housing makes it much quieter.
My surface grinder came with a vac attachment point so with a little hose that part was easy.
 
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