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View Full Version : Anybody have plans for Machine Skates



gda
01-30-2010, 09:43 AM
I'm thinking of making a set as my next project. I looked around a bit and only found this post by Tinkerer on a nice set he made:

http://bbs.homeshopmachinist.net/showthread.php?t=25162&highlight=machine+skates

(Tinkerer: Are you using bushings on the rollers or just steel to steel?)

From what I see there are 3 basic types:

1) el-cheapo roller bearings on a shaft welded to a plate
2) Bigger, single level of rollers under a c-channel type plate
3) Hilman style over/under tank roller type.

Does anybody have any free plans for either of the 2 types of heavier duty ones? (or tips or construction notes, etc). I'm thinking of making a set in the 3 ton per skate range. I'm leaning to the tank style because it will mean more parts to turn and that it would be fun to set up "production".

I've made lots of machine dollies and mounted casters in the past so I'm not interested in alternate solutions, I want to make a set of skates.

JoeFin
01-30-2010, 10:32 AM
I've used the Hilman Skates numerous times - they can sure take the payload, but the floor better be free of every spec of dirt and chip or they come right out

I would be more interested in Hilman Skates if they had different Pads that could interchange on the skate. Some thing with a lip that could be strapped to the side of the machine base

DR
01-30-2010, 12:06 PM
.................................................. .............
but the floor better be free of every spec of dirt and chip or they come right out

.................................................. ..............




Yep, Hillman skates can be very dangerous.

How many first time users do you suppose have tipped machines over using them?

rockrat
01-30-2010, 12:44 PM
Tinkerer made a nice set, I have to put that on my to-do list.

It would be cool to find these somewhere cheap -
http://www.hss.com/imagshop/imaggrup/large/70408.jpg

The rollers without the top look like this -
http://www.kennards.com.au/product_pic/lpictures/310170.jpg

Basically a bunch of little bar rollers on a chain. The rollers on the bottom transmit the force to the skate through the frame and not the chain. If the little rollers get caught rolling on the floor, they roll as a chain around the skate until they are over the dirt/crack.

rock~

.RC.
01-30-2010, 03:22 PM
http://www.practicalmachinist.com/vb/showthread.php/machine-skates-78427.html?t=78427&highlight=skates

http://www.practicalmachinist.com/vb/showthread.php/machine-rollers-build-your-95005.html?t=95005&highlight=skates

BadDog
01-30-2010, 03:39 PM
I used a set of Hillmans to move my Rockwell making way for my current lathe to be delivered. In my boundless ignorance, I put one at each of the 4 corners. Just as warned previously (and obviously if you think about it), any discrepancy in the floor, including slight deviations from single plane, will allow one to scoot out. This happened with one at the headstock end, and it very nearly went over on it's face. I and my son "caught it", but just barely, as another moved out of position leaving it cross balanced on 2. When we got it near level, I held while my son repositioned the skate on the heavy side.

With a (relatively) rigid structure and narrow footprint like a lathe, smart money (obviously not mine) is on a 3 point system. What we should have done was rig a support on the tail stock end that positioned a single skate under the tail stock center. But even then it is a risky operation, and best to try to find some way to secure them to the load (not easy in most cases).

krutch
01-30-2010, 05:56 PM
Yep, Hillman skates can be very dangerous.

How many first time users do you suppose have tipped machines over using them?

I one. One skate took off on its' own, level floor, where? Clausing started to tip, panic! It tipped to its' corner and stopped. I don't use all four of 'em any more. Three points work for me.
Krutch

saltmine
01-30-2010, 07:14 PM
You mean like these?

http://i643.photobucket.com/albums/uu155/saltmine_album/skates.jpg

Tinkerer
01-30-2010, 08:11 PM
I'm thinking of making a set as my next project. I looked around a bit and only found this post by Tinkerer on a nice set he made:

http://bbs.homeshopmachinist.net/showthread.php?t=25162&highlight=machine+skates

(Tinkerer: Are you using bushings on the rollers or just steel to steel?)

From what I see there are 3 basic types:

1) el-cheapo roller bearings on a shaft welded to a plate
2) Bigger, single level of rollers under a c-channel type plate
3) Hilman style over/under tank roller type.

Does anybody have any free plans for either of the 2 types of heavier duty ones? (or tips or construction notes, etc). I'm thinking of making a set in the 3 ton per skate range. I'm leaning to the tank style because it will mean more parts to turn and that it would be fun to set up "production".

I've made lots of machine dollies and mounted casters in the past so I'm not interested in alternate solutions, I want to make a set of skates.
gda... They just have a 3/8" 4140 CR axle that has a press fit in the channel. The wheels are 1018 with a running fit. I just give a squirt of oil before using. It's not a high speed deal so no need for bushing. I can take some exploded picture views with basic measurements if you would like. The nice thing about them is the low profile. I was able to use the leveling screws and a couple of 1" boards to raise enough to push them under. I built 4 but only used three to transport... the forth was used to skip over thresholds. I can say they work like a charm and make moving lathes... mills and crates very easy. ;)

gda
01-30-2010, 08:58 PM
Tinkerer: Thanks for the info. I'm leaning to making your style since I hae some 4" channel. I like the center support idea when I look at your pictures deeper.

A couple of questions:

1) Why did you choose 8 rollers over 4 for the skate? Are they all independant?
2) What size balls did you use in the top swivel plate?
3) Did you just machine a ball groove in each piece an bolt them together?
4) Anything you would change to the design?

Tinkerer
01-30-2010, 11:45 PM
I did the 8 wheels as it make it easier to turn when needed and also just felt right. There are washers that space between all wheels and the web of the channel. The wheels have a profile to them kinda like a steel caster wheel. Yep there is a center support on both ends. I took and smoothed the top of the channel with the shaper but a fly cutter will do as well. The race is milled in the bottom of the swivel only. I'd have to check but I believe it was about 1/2 wide and depth I'd have to again check but was like 70% of the balls height. As for the balls I went to wally world and bought some steel BB's. :D Hey they work fine and did check no flat spots. Just but a film of grease in the grove and fill to 80% in my case that was around 100 BB's for me.

Change anything... on the skates no I don't think so... they are compact as sturdy. The handles I'd make them so they could be broken down.. instead if one piece. Storage issue only. ;)

gda
12-03-2010, 08:56 PM
Well I made my skates earlier this year, and just posting now. Work pretty good.

http://i222.photobucket.com/albums/dd48/tool_collector/machine%20skates/skate-03.jpg

http://i222.photobucket.com/albums/dd48/tool_collector/machine%20skates/skate-07.jpg

http://i222.photobucket.com/albums/dd48/tool_collector/machine%20skates/skate-05.jpg

http://i222.photobucket.com/albums/dd48/tool_collector/machine%20skates/doallbandsaw-04.jpg