Thread: Slideway grinders go for a song

Been thinking about machinery skates that I will need to move the grinder into position... My current ones are not suitable since they were loaned to someone and came back with 40% of the bearings smashed and the axle shafts bent.

I have a devious plan to buy a heap of 6202 chinese bearings as they are quite cheap and stacking three together and boring out some pipe for them to slip into, then cover the outside of the pipe with short pieces of polythene pipe to give the rollers a plastic outer covering.

Originally Posted by .RC.

Been thinking about machinery skates that I will need to move the grinder into position... My current ones are not suitable since they were loaned to someone and came back with 40% of the bearings smashed and the axle shafts bent.

What did they load onto the skates????

I moved my HBM with a pallet jack under the headstock and 2 heavy machinery skates under the TS end. I was over the weight capacity of the pallet jack but managed. Got it off the skates & pallet jack using a short ram portapower unit and blocks.

I've made other skates for moving my 7.5 tonne boat, they are 75NB Sched 80 pipe lengths with 1" thick steel slugs welded into the ends then bored for a 1" ID sintered bronze sleeve, 1" diameter axles welded into 125mm parallel flange channel sections. 2 rollers per section. No dramas so far which means I haven't bought anything heavy enough - yet.

PDW

Originally Posted by .RC.

Been thinking about machinery skates that I will need to move the grinder into position... My current ones are not suitable since they were loaned to someone and came back with 40% of the bearings smashed and the axle shafts bent.

I have a devious plan to buy a heap of 6202 chinese bearings as they are quite cheap and stacking three together and boring out some pipe for them to slip into, then cover the outside of the pipe with short pieces of polythene pipe to give the rollers a plastic outer covering.

I tell myself that if you can move it one inch, then you can move it a mile, just a matter of repeating the process as many times as it takes. Pipes and crowbar.
Someone once said, "Give me a place to stand and a long enough lever and I can move the world"

PS. Shed looks good, not big enough tho.

Originally Posted by PDW

What did they load onto the skates????

40ft shipping container

Originally Posted by RayG

PS. Shed looks good, not big enough tho.

Currently just south of Rockhampton they are building a very long bridge to floodproof a short section of road.. All the concrete bearers for the bridge were made on site in a large shed that was newly constructed for the job... http://www.auvena.com.au/projects/jo...south-project/

About 12 months old... They have finished pouring the beams so apparently last week they got two excavators in and demolished the shed and scrapped it... Your tax dollars at work...

What a bl***y waste, that could've gone out for a tender and got some money back. Governments local, state and federal should be held more accountable. Bronnies flight is nothing compared to this, was the overhead crane scrapped as well?
Kryn

Originally Posted by .RC.

Been thinking about machinery skates that I will need to move the grinder into position...

These are the ones I offered to throw on the truck with your machine.

http://teamsystems.net.au/industrial....html#myAnchor

$172 bucks plus GST in 6T each.

There's also these if you wanted to roll your own. http://www.ebay.com.au/itm/2-Solid-N...item2a47a3bd0b

You would likely get them cheaper straight out of China.

Don't discount plain journal rollers. You wont be too upset about floor damage. The first set I ever built where just Cast iron hollow bar, bored out with a hand full of clearance, running on bright shafts. Steel wouldn't be out of the question but you would probably be paying for 4140.

But dead simple to make, cut to length, turn, bore and chamfer. Once you get rid of the ball bearings, and back onto plain journals, your load capacity shoots up really quick.

Touch harder to push, but you have a tractor. One of the old riggers I used decades ago had a set sitting in a tub of diesel, on his rigging trailer.

Phil

Looks like the grinder going on holidays is still on the move - just off the cost of West Africa, soon to dock in Tangier.
Bloody slow when you are waiting...

Michael

Originally Posted by Michael G

Bloody slow when you are waiting...

No ones waiting harder than me. I'm starting to regret this job. 1/3rd of my over draft is invested in that container. That's just in materials / crane.

Customer has gone absolutely stone cold silent since its shipped. I'm guessing they are playing the wait until its here game

Regards Phil.

Originally Posted by Machtool

These are the ones I offered to throw on the truck with your machine.

http://teamsystems.net.au/industrial....html#myAnchor

$172 bucks plus GST in 6T each.

There's also these if you wanted to roll your own. http://www.ebay.com.au/itm/2-Solid-N...item2a47a3bd0b

You would likely get them cheaper straight out of China.

Don't discount plain journal rollers. You wont be too upset about floor damage. The first set I ever built where just Cast iron hollow bar, bored out with a hand full of clearance, running on bright shafts. Steel wouldn't be out of the question but you would probably be paying for 4140.

But dead simple to make, cut to length, turn, bore and chamfer. Once you get rid of the ball bearings, and back onto plain journals, your load capacity shoots up really quick.

Touch harder to push, but you have a tractor. One of the old riggers I used decades ago had a set sitting in a tub of diesel, on his rigging trailer.

Phil

I actually forgot the name of the website when you told me about them, then I forgot about it altogether...

I have ended up getting a fair few 6202 bearings... They are only a $1.75 each.. Still have your chain here, just have not been to town to get it posted off..

Hope the container gets there soon so you can get fully paid... But I know ships can get delayed for days at ports, just waiting to get in...

Originally Posted by .RC.

I have ended up getting a fair few 6202 bearings...

15mm shaft? Once upon a time that was close enough to half an inch. Don't just add the dynamic load up, to come up with a load carrying capacity.

With Run Out and internal clearance. They will just systematically smash one after the other.

Doesn't matter if you stack 2 - 4- 6 -8 of them in a row. One of them will be carrying the load until it collapses.

Have you ever seen a commercial design, with more that 2 - 62xx bearings in it? One at each end of the shaft.

Regards Phil.

Yea, I learnt that lessen with the skates Mk1 version and my friend with his 40ft shipping container.. The bearings just disintegrated, one after the other..

Spreading any load out is the key I think...

I have uncovered the slab and painted it with a sealing compound that I had on hand, left over from a different project.. It seals the slab so that any moisture for continued hydration stays in the slab... It is just glorified PVA glue.. I will soon cement the area around the slab, as well as make the skates and then when I think the slab is sufficiently strong enough move the grinder into position... The bearings arrived in the post today..

20150722_160520.jpg

The CBN wheel I purchased from the UK arrived today, only a 100mm one, but will be a start.. I am still working on the design for the skates.. Yesterday I purchased some 1" steel pipe couplings, only $1.50 each from Metalland.. I will bore these out and insert the 6202 bearings into them, then have plastic over the top... Eight or nine rollers to a skate... Have to try to spread the load out onto as many rollers as possible, as Phil pointed out above if the load goes onto one roller the bearings will just collapse.. Total cost for a completed roller will be about $5... But I may yet go solid wheels with greased plain bearings to move the grinder and use lighter skates for my smaller stuff that has to be moved yet again...

Originally Posted by .RC.

I will bore these out and insert the 6202 bearings into them, then have plastic over the top... Eight or nine rollers to a skate...

Doesn't the "plastic" part need to be between the tube and the bearing? Otherwise isn't the plastic going to spread the load over the outside of the tube and then the tube focus the load back onto one(two) bearings?

Stuart