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Occasional usage Sand blaster

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Graham Meek15/01/2019 11:19:05
68 forum posts
49 photos

A little something I knocked up to make sand blasting the odd brass fabrication easier. Given the high air supply demands of commercial cabinets, I decided to make something a little less bulky and that would work off my shop compressor.

Regards

Gray,

view from the rear showing rubber glove attachment and filtered air exit.jpg

inside the top of the bin, note battery operated led light with protection screen.jpg

all the workings, sump pan directs media to suction pipe. filter protection baffle at the rear also reflects light from the led.jpg

JasonB15/01/2019 11:29:49
avatar
Moderator
15010 forum posts
1528 photos

Graham, have you got a few more details of teh actual "gun" part that looks like it is powered by a standard blower nozzle?

Ady115/01/2019 11:33:18
avatar
3462 forum posts
513 photos

Looks seriously handy

Tell us more Graham, thx

Dave Halford15/01/2019 11:38:50
349 forum posts
3 photos

You covering the screen with plastic, like you get from cracker boxes?

John Rudd15/01/2019 11:47:05
1364 forum posts
58 photos

Nicely done..! Great for small parts..

Let us know how well it works..please?

What abrasive are you using? I use garnet or aluminium oxide, of course depends on what is being cleaned..

Vic15/01/2019 13:38:46
1990 forum posts
10 photos

Nice job. When I made my first sand blaster all the recommendations I could see said you need a massive compressor to run a blasting cabinet. I took a chance anyway and bought a small 2.5 hp 25 litre compressor and found it worked fine for doing small stuff at home. I got rid of my Heath Robinson "cabinet" when I moved house but luckily someone gave me one of the small Clarke blasting cabinets and that works fine. It does say in the instructions that you need a compressor at least double the size that I've got but for what I do the one I've got is ok. Machine Mart sell Aluminium Oxide abrasive in medium and coarse. I normally use the medium stuff in my cabinet.

Vic15/01/2019 13:41:21
1990 forum posts
10 photos

The Tangential Tool in my album has been sand blasted.

Rob Rimmer15/01/2019 13:59:08
66 forum posts
1 photos

What a great idea! Would love to know more, particularly about the 'gun' part.

Graham Meek15/01/2019 16:15:16
68 forum posts
49 photos

Here are a couple of examples of the work done with the unit.

The nozzle is the heart of the matter and if Neil would like a write-up on how I went about making this unit I will oblige.

fiat 702 view from the magneto side..jpg

fig crankases, embryo cylinder heads, con-rods and rotary valve endplates.jpg

Regards

Gray,

Matt Harrington15/01/2019 17:59:08
avatar
100 forum posts
6 photos

What a clever idea!

Matt

Vic15/01/2019 18:16:35
1990 forum posts
10 photos

There is a drawing of the commercial gun here:

**LINK**

Both the Air nozzle (brass) and Abrasive nozzle (ceramic) are replaceable as they wear away with use.

This is the grit I use, they also do several others.

**LINK**

Howard Lewis15/01/2019 22:00:59
1798 forum posts
2 photos

Very neat!

Is the viewing panel sheet acrylic?

Food for a lot of thought there. (And "Where do I store it"? )

A write up would be good.

Howard

duncan webster15/01/2019 22:31:44
avatar
1953 forum posts
44 photos

Definitely write up required, I want one!

My compressor is not 3hp, Not sure what it is, it came from the tip. Can it work in short bursts from a smaller one with a reservoir

Vic15/01/2019 23:30:46
1990 forum posts
10 photos

It may be worth pointing out that if you have the space (or need for bigger capacity) that there are bench top blasting cabinets on the auction site for under £70.

XD 35116/01/2019 01:44:35
avatar
1210 forum posts
83 photos

yes X 1000 for that idea ! I never thought a rubbish bin could be used for a blasting cabinet !

If memory serves me correctly ( usually doesn't ) you can turn the other glove ( R/H one in the set ) inside out and it becomes a left hand glove .

Graham Meek16/01/2019 10:23:36
68 forum posts
49 photos

This is the size of compressor that I use. Okay if you use it sensibly.

Regards

Gray,

my compressor.jpg

Les Jones 116/01/2019 11:00:12
2065 forum posts
141 photos

Hi Graham,
It's nice to see you back on this forum. Hope you are well and enjoying retirement.

Les.

John Pace16/01/2019 12:42:34
122 forum posts
121 photos

I built one of these sandblast cabinets 20 + years ago from
a kit of hardware parts and the drawings for the cabinet
made from plywood,it will run all day on the same size
of compressor.

It looks as if the vent on the back of the bin blaster has a
filter in it these are worse than useless as they block up very
quickly so the dust finds the next easy route out.I doubt
that it would be wise to use this inside the workshop you
would find out why the next time you use your lathe.

My own cabinet is sealed and vented externally.

Rubber gloves 24 inch in length are avalable from J&L
Pt no GLV-90082E.

John

005.jpg

Graham Meek16/01/2019 14:40:24
68 forum posts
49 photos
Posted by Les Jones 1 on 16/01/2019 11:00:12:

Hi Graham,
It's nice to see you back on this forum. Hope you are well and enjoying retirement.

Les.

Hi Les,

Thanks for the welcome back, sometimes I wonder if I did the right thing, but we shall see.

Regards

Gray,

I keep my unit in an annex, it does not take up any real-estate in the workshop proper, (I cannot afford to waste the space) and is used mainly in this location. As regards costs, this unit cost no more than £20. Some of the items were ex-stores stock, others were salvage items.

My first lash-up for the "blast box", a wooden box with a perspex lid, had no ventilation to the outside as such, but instead had a connection to the shop vacuum. In this design the need for the vacuum was felt unnecessary, but builders can fit one if they wish, using many of the domestic waste fittings. Two years on of occasional usage the filter is still clean. No doubt my internal baffle allows the heavier particles to fall before the air exits the filter.

Regards

Gray,

Vic16/01/2019 15:42:42
1990 forum posts
10 photos

I use a shop vac hooked up to mine. It means the air in the workshop is cleaner and you can see what's going on in the cabinet better.

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