Lapidary / Gemstone Community Forum

Lapidary Shop / Moderator, Catmandewe ( Tony ) => Shop / Work Area Safety => Topic started by: jakesrocks on February 17, 2015, 12:59:50 pm



Title: Looking for opinions.
Post by: jakesrocks on February 17, 2015, 12:59:50 pm
I'm in the process of building a dedicated work bench for mineral / fossil cleaning & prep work. My plans are to incorporate a dust collector in the back of the bench. My plans had been to mount 3 wafer fans and a filter in the backboard. Yesterday while looking for something completely different, I ran across this item, and am wondering if it would do as good a job of sucking dust away from me.
What do our members think ?
http://www.ebay.com/itm/141270959515?_trksid=p2060778.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT


Title: Re: Looking for opinions.
Post by: bobby1 on February 17, 2015, 01:12:28 pm
I would think that a 25 watt fan motor might not move much air.
The design and layout looks good.
Bob


Title: Re: Looking for opinions.
Post by: Charles on February 17, 2015, 01:40:59 pm
It looks god to me. It will move 4 cu meters of air a minute which should be enough while cleaning the items particularly in that small area. My question would be the cost of replacement filters since it seems it may take an odd side filter. I didn't see how much the filters would run.

Just my thoughts


Title: Re: Looking for opinions.
Post by: jakesrocks on February 17, 2015, 02:29:06 pm
The same company has replacement filters at $9.99 each.

My original plans were to  use 3 of the wafer fans, (which I already have), built into the back of the bench and covered with a washable filter. Each of the wafer fans will move 110 CFM of air.

As stated, I already have the fans. Also the mounting plate for the fans, the filter and mounting cage for it. Everything was surplus material from computer racks.

On another forum it was suggested that I use a squirrel cage fan which would certainly do the job, but that would leave a big fan hanging off the back of the bench. Shop space limitations just won't allow the extra space that would be needed.

I should add that I'm already using 2 of these same wafer fans to move warm air from my fireplace into the living room. Warm as toast in there, so 3 of these fans mounted in a 1-1/2 X 2 foot  area should draw enough air out of my work area.


Title: Re: Looking for opinions.
Post by: slabbercabber on February 17, 2015, 02:56:34 pm
Each of your fans moves about four times as much air as that hobby thing.  Sounds like you're going at it the better way.


Title: Re: Looking for opinions.
Post by: jakesrocks on February 17, 2015, 03:13:52 pm
I was looking at the hobby thing as a quick way to get  up & running. Too cold out in the shop to work on my new bench, and mamma won't let me cut wood or drill holes inside where it's warm.

Bench framework is all aluminum T slot extrusions. Side & back panels will be 1/4" birch plywood with a 1'2" thick shelf above. The 1/4" birch will fit right into the T slots and add strength to the frame. The bench top is going to be 3/4" MDF with 4 coats of sanding sealer applied, then waxed. Makes for a good water resistant bench top.

When it finally warms up enough to get back in my shop to work, I'll do a build thread on the bench.


Title: Re: Looking for opinions.
Post by: dickb on February 17, 2015, 11:15:25 pm
Take a look at a used stove vent hood or a small bathroom exhaust fan for the fan. Then use the paper pleated furnace filters in front of it to catch the fumes and soot. I would make it just like the one you pictured with the exhaust pointing up toward the ceiling. Beware... soldering in the house will set the smoke alarms off!

HA HA

Dickb


Title: Re: Looking for opinions.
Post by: Charles on February 18, 2015, 04:33:37 am
Just as an added fact here 110 cubic ft. is 3.1 cubic meters. The hobby thing fans moves 4 cubic meters a minute.


Title: Re: Looking for opinions.
Post by: slabbercabber on February 18, 2015, 06:57:05 am
Just as an added fact here 110 cubic ft. is 3.1 cubic meters. The hobby thing fans moves 4 cubic meters a minute.

My bad.  I missed that "4".


Title: Re: Looking for opinions.
Post by: jakesrocks on February 18, 2015, 08:14:14 am
Dickb, I looked at bathroom exhaust fans. They really don't move a lot of air. They're designed more to remove steam and fart smells. I'd rather have my exhaust at the rear where it will draw the dust away from me. than almost over my head. With the bathroom exhaust fan, as soon as it's turned off much of the dust is going to fall back onto the bench. With the exhaust fans at the back, any dust that falls out will be at the rear of the bench.

Someone on another forum suggested using a shop vac and hepa filter. I've rejected that idea. Once again it's a space problem. Plus shop vacs are noisy. The little wafer fans barely produce any noise.


Title: Re: Looking for opinions.
Post by: jakesrocks on February 18, 2015, 08:33:24 am
These are the parts that I'll probably use for my exhaust system. The whole works when assembled will only be about 2-1/2" thick. Won't take up a lot of space behind the bench. It doesn't show good in the pic, but the piece on the right is the washable foam filter in its metal housing.

(https://gemstone.smfforfree4.com/proxy.php?request=http%3A%2F%2Fi907.photobucket.com%2Falbums%2Fac274%2Fjakesrocks%2FModular%2520Construction%2F000E1254_zps1093ad4d.jpg&hash=a2870ae935f585e9db5db58f9156d21e) (http://s907.photobucket.com/user/jakesrocks/media/Modular%20Construction/000E1254_zps1093ad4d.jpg.html)


Title: Re: Looking for opinions.
Post by: Charles on February 18, 2015, 09:19:16 am
Don, keep us posted on the project and how good it works....


Title: Re: Looking for opinions.
Post by: jakesrocks on February 18, 2015, 09:26:09 am
Don, keep us posted on the project and how good it works....


Hey Charles, once the spring thaw arrives, and I can get back in my shop, I plan on doing a whole build thread. In the meantime, I've prefabbed most of the aluminum framework for the bench.

When completed, the bench will have my Foredom, 2 mini air chisels, 2 pencil type die grinders, a Passche air eraser which will give me pin point soda blasting capabilities, A small air compressor which is arriving today,
(hope I can hide it before my wife spots it), Lighting below the top shelf, a 6 hole air manifold with needle valve pressure control, a 6 outlet power strip and foot controls for both the air tools and the Foredom.

Being made of aluminum T extrusions, I guess you could call it modular construction. It will be easy to move or add parts on the bench as needed. The extrusions are a bit expensive, but it's so easy to work with. Just 1 allen wrench needed for everything.


Title: Re: Looking for opinions.
Post by: jakesrocks on February 18, 2015, 09:59:18 am
If anyone is interested in trying modular construction, I buy my materials as surplus offcuts straight from the manufacturer.  By carefully looking through their listings, and being just a little bit flexible in the size of project you're building, you can put almost anything together.

They have different series of materials, and also standard & metric materials. It's important to use all materials from the same series. I'm using 10 series for most of my projects.

It's also important to carefully plan out your project, and have a complete build list before ordering materials. As stated, these pieces are all surplus offcuts. A length of a certain material may be available today and gone tomorrow, so know exactly how many pieces of a certain length you need, and order them all at once.

The company I have been buying my materials from is http://stores.ebay.com/8020-Inc-Garage-Sale/Extrusions-Fractional-T-Slot-/_i.html?_fsub=6479546


Title: Re: Looking for opinions.
Post by: PhilNM on February 18, 2015, 12:23:04 pm
If you ever run across an used soldering station, grab it. I used to use one years back, and they basically a large workbench where the whole top and back are a micro perforated material that a large fan sucks air constantly downward so you never have to breathe the fumes. Worked great, would be great for what you want.


Title: Re: Looking for opinions.
Post by: jakesrocks on February 18, 2015, 01:17:11 pm
LOL Phil, if I buy any more stuff, mamma's gonna kill me. I already have too much money tied up in parts for the bench I'm building.


Title: Re: Looking for opinions.
Post by: metalartz on February 18, 2015, 04:27:40 pm
Hope you are planning on having the exhaust go outside.  If not you do want to be using a hepa filter.
Remember the smaller the particles the worst they are for you, and the longer they stay in the air.  And if you do exhaust outside  not sure you need much of a filter as you are grinding rock not grinding precious metal.


Title: Re: Looking for opinions.
Post by: jakesrocks on February 18, 2015, 08:41:47 pm
The bench will be on lockable wheels so it can be moved outside for really dusty jobs, and I will be using a good dust mask.  Much fossil prep is done with an air scribe. It produces mostly large particles which shouldn't float on the air. Any grinding will be done with diamond bits in water, so shouldn't be a major problem. The only thing that worries me where dust is concerned will be the soda blasting. It will produce very fine dust particles.


Title: Re: Looking for opinions.
Post by: jakesrocks on February 20, 2015, 03:17:17 pm
WOO HOO  ura12. My foot pedal will be here this afternoon. Just ordered the 1/8" barbed fittings and a dozen mini hose clamps. I'll soon be able to try everything out. I'll report on how the foot pedal works.


Title: Re: Looking for opinions.
Post by: slabbercabber on February 20, 2015, 05:07:43 pm
That perforated top sounds like a terrific idea.  If you go with a back fan, you will want to consider a linear draft system.  Can't remember what it is called just now, but basically a 2 inch tall filter will draw air over the work as opposed to a large area and low velocity.