There was a thread here a few weeks back about powered soil sifting.
Here is my version if you are interested.
http://s115.photobucket.com/albums/n...Soil%20Sifter/
I have a very stony garden. about 1 sq metre of soil dug to a couple of
spade depths yields a builders barrow of stones. The sifter mesh is 25mm
square.
Bob

Bob Minchin wrote:
There was a thread here a few weeks back about powered soil sifting.
Here is my version if you are interested.
http://s115.photobucket.com/albums/n...Soil%20Sifter/
I have a very stony garden. about 1 sq metre of soil dug to a couple of
spade depths yields a builders barrow of stones. The sifter mesh is 25mm
square.
Bob
So, how much are you selling them for?

Broadback wrote:
Bob Minchin wrote:
There was a thread here a few weeks back about powered soil sifting.
Here is my version if you are interested.
http://s115.photobucket.com/albums/n...Soil%20Sifter/
I have a very stony garden. about 1 sq metre of soil dug to a couple
of spade depths yields a builders barrow of stones. The sifter mesh is
25mm square.
Bob
So, how much are you selling them for?
Ha! This is a one of a kind.

A whole host of safety issues before it could go on the market and
numerous details of the design that could be better to say nothing of
the 400 v single phase ac supply concocted from various transformers!
Nearly everything came from the scrap box or designed around bits bought
off ebay.

Still, it does the job!

Bob

Bob Minchin wrote:
There was a thread here a few weeks back about powered soil sifting.
Here is my version if you are interested.
http://s115.photobucket.com/albums/n...Soil%20Sifter/
I have a very stony garden. about 1 sq metre of soil dug to a couple
of spade depths yields a builders barrow of stones. The sifter mesh
is 25mm square.

What a wonderful example of British ingenuity!

The Effin Softy people would have a fit mind you....


--
Dave - The Medway Handyman
www.medwayhandyman.co.uk

On 8 Jun, 17:31, Bob Minchin wrote:
There was a thread here a few weeks back about powered soil sifting.
Here is my version if you are interested.http://s115.photobucket.com/albums/n...Soil%20Sifter/
I have a very stony garden. about 1 sq metre of soil dug to a couple of
spade depths yields a builders barrow of stones. The sifter mesh is 25mm
square.
Bob

Bob ... very interested in this ... have you made a set of drawings
for this ? ...... (or is that being to cheeky)

Osprey wrote:
On 8 Jun, 17:31, Bob Minchin wrote:
There was a thread here a few weeks back about powered soil sifting.
Here is my version if you are interested.http://s115.photobucket.com/albums/n...Soil%20Sifter/
I have a very stony garden. about 1 sq metre of soil dug to a couple of
spade depths yields a builders barrow of stones. The sifter mesh is 25mm
square.
Bob

Bob ... very interested in this ... have you made a set of drawings
for this ? ...... (or is that being to cheeky)

Not at all cheeky just naive! LOL

I just made everything to fit from what materials were to hand.

Started with a tray for the sieve unit that fitted some wire mesh that I
had lying around.
Then a frame for that to sit in with a few mm clearance all round.
This is hung on four short wooden arms each partially bored at either
end with a 35mm hinge bit. 35mm diameter ballraces set in each end. 8 in
total.
Then I made a static frame and hung the oscillating frame in it off the
4 arms.
The crank was made adjustable to give a throw of between a few mm and 50
mm. The motor is a 3 phase 6 pole unit run from an inverter for variable
speed.
The con rod was made the same way as the arms but longer. same 35mm
bearings. Bought a pack of 10 off fleabay - stupidly cheap.
Even the pillow blocks for the crankshaft were less than a fiver each.

No design here!! I just fiddled with the throw and the motor speed until
it sifted OK
Do it too slow and it does not sieve, too fast and it walks all round
the garden!
6 pole motor does 950 rpm from 50Hz, I ended up with 40Hz so that means
the motor runs at 760 rpm. Toothed belt drive is 22 tooth driving 72
tooth wheel. So the crank is doing 232rpm or just under 4 rps.

The fixed stand was dimensioned to allow a wheel barrow to fit under it
and to suit some beech I happened to have around and cross braced with
some 18mm ply scrap.

I hope this has given you some ideas to work from.

A few simple metal components turned up on the lathe and basic woodwork
- job done.

If you are anywhere near Southampton then you can drop in and see the beast!

HTH

Bob
bobdotminchinatntlworlddotcom

In message
,
Osprey writes
On 8 Jun, 17:31, Bob Minchin wrote:
There was a thread here a few weeks back about powered soil sifting.
Here is my version if you are
interested.http://s115.photobucket.com/albums/n...rsphotos/Soil%
20Sifter/
I have a very stony garden. about 1 sq metre of soil dug to a couple of
spade depths yields a builders barrow of stones. The sifter mesh is 25mm
square.
Bob

Bob ... very interested in this ... have you made a set of drawings
for this ? ...... (or is that being to cheeky)

I've got lots of working electric motors lying about. Commercial hat
on:-)

regards


--
Tim Lamb

The Medway Handyman wrote:

The Effin Softy people would have a fit mind you....

I rather like that expression. Can I pinch it?

Dave

Dave wrote:
The Medway Handyman wrote:

The Effin Softy people would have a fit mind you....

I rather like that expression. Can I pinch it?


Please do.


--
Dave - The Medway Handyman
www.medwayhandyman.co.uk

"Tim Lamb" wrote in message
...
In message
,
Osprey writes
On 8 Jun, 17:31, Bob Minchin wrote:
There was a thread here a few weeks back about powered soil sifting.
Here is my version if you are
interested.http://s115.photobucket.com/albums/n...rsphotos/Soil%
20Sifter/
I have a very stony garden. about 1 sq metre of soil dug to a couple of
spade depths yields a builders barrow of stones. The sifter mesh is 25mm
square.
Bob

Bob ... very interested in this ... have you made a set of drawings
for this ? ...... (or is that being to cheeky)

I've got lots of working electric motors lying about. Commercial hat on:-)


care to give any away ?

this sounds like a project I need to build.

"Bob Minchin" wrote in message
...


Bob ... very interested in this ... have you made a set of drawings
for this ? ...... (or is that being to cheeky)

Not at all cheeky just naive! LOL

The con rod was made the same way as the arms but longer. same 35mm
bearings. Bought a pack of 10 off fleabay - stupidly cheap.
Even the pillow blocks for the crankshaft were less than a fiver each.




Bob ... thanks for that, the crank seems to be the biggest troublesome item
..... wood work side no problem, but I no longer have access to a lathe.

I'm assuming the somewhat complex motor arrangement was just to use what you
had ? ...
A suitable 1/2 hp 1ph induction should do the job, key would be getting
toothed belt step down ratio correct.
Thinking here that a cement mixer motor would have enough ooomph.

Or do you find variable speed is needed ?

Did you get the bearing supports of ebay as well ? ..

Rick Hughes wrote:

"Bob Minchin" wrote in message
...


Bob ... very interested in this ... have you made a set of drawings
for this ? ...... (or is that being to cheeky)

Not at all cheeky just naive! LOL

The con rod was made the same way as the arms but longer. same 35mm
bearings. Bought a pack of 10 off fleabay - stupidly cheap.
Even the pillow blocks for the crankshaft were less than a fiver each.




Bob ... thanks for that, the crank seems to be the biggest troublesome
item .... wood work side no problem, but I no longer have access to a
lathe.

I'm assuming the somewhat complex motor arrangement was just to use what
you had ? ...
A suitable 1/2 hp 1ph induction should do the job, key would be getting
toothed belt step down ratio correct.
Thinking here that a cement mixer motor would have enough ooomph.

Or do you find variable speed is needed ?

Did you get the bearing supports of ebay as well ? ..
Hi Rick,

The most common motors are 4 pole 1425 rpm. I found that a crankshaft
speed of 230 is rpm seems about right. so that means more than 6:1 speed
reduction. Vee belt would need at least 2" pulley for the motor to get a
good grip for the belt and then a 12-13" driven pulley!!
I opted for toothed belt drive for grip but 22 was the smallest pulley
that would fit my motor and would need about 135 teeth - blooming
expensive. My 72 tooth was the dearest item I had to buy from RS even
with trade discount.
If you can find a 6 pole (950 rpm) or even an 8 pole (720 rpm) this will
help a lot.
Yes I just happened to have a 3 phase motor and an inverter as I collect
such things when I see them free/cheap on the bay.
Once I got the speed right, I've not needed to change it but the
inverter does give me a soft start over 5 seconds so i can load up the
sieve and then switch on (starting loaded without a soft start might be
a bit vicious)but I suppose i could always start empty and load once it
was running.
Using the variable speed and the adjustable throw crank just meant I did
not have to get everything spot on.
Yes the pillow blocks can from ebay. Joanne at JBenterprises (or
something like that) will sort you out for those.
http://myworld.ebay.co.uk/779joanne.

HTH

Bob

"Bob Minchin" wrote in message
...
Rick Hughes wrote:

"Bob Minchin" wrote in message
...



Yes the pillow blocks can from ebay. Joanne at JBenterprises (or something
like that) will sort you out for those.
http://myworld.ebay.co.uk/779joanne.

HTH

Bob

Cheers Bob ... I'll look on eBay.
Did you use a standard mesh ...from steel suppliers, or buy in something ?

Rick Hughes wrote:

"Bob Minchin" wrote in message
...
Rick Hughes wrote:

"Bob Minchin" wrote in message
...



Yes the pillow blocks can from ebay. Joanne at JBenterprises (or
something like that) will sort you out for those.
http://myworld.ebay.co.uk/779joanne.

HTH

Bob

Cheers Bob ... I'll look on eBay.
Did you use a standard mesh ...from steel suppliers, or buy in something ?
The mesh was some stuff i had around for years originally liberated from
work scrap bin.
2" mesh 1/8 wire welded and each junction. I used two layers offset by
half a square in each axis to give 1" mesh. I wanted to leave some
stones in for drainage but for choice I'd go for 3/4" another time. it
is quite surprising the size of stones that find a way through 1" mesh.
I should have realised as normal concrete ballast is 20mm. Wonderful
thing hindsight!

Dont underestimate the load taken by the mesh. My sieve holds two full
shovels of dirt and stones. Ordinary chicken wire wont last. Most of the
mesh in the garden centres or B&Q was rubbish
You could do worse than one of those galvanised foot scraper come
doormat things like ebay no 310058046303.

Regards

Bob

In message , Rick Hughes
writes

I've got lots of working electric motors lying about. Commercial hat on:-)


care to give any away ?

this sounds like a project I need to build.

Scrap value?

Actually, there is a single phase geared drive which was the stirrer
motor for our bulk milk tank. Probably too slow. Most are in the range
0.5 to 3hp and 4 pole. Previous uses were grain augers, feed mixers, fan
drives etc.

regards

--
Tim Lamb