Thread: Dry Ice

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This stuff comes in handy for press fitting parts like GM power steering pumps. 5 minutes on dry ice will shrink the pump, 15 minutes in the oven @ 220 will expand the housing. Little grease and they pop together nicely. This week I will try it on cam bearings. Local grocery outlets carry it. Bring leather gloves if you are going to handle.
http://www.dryiceinfo.com/

At work we freeze press bearings alot . We use it on 6 to 8 inch bearing with a press fit of .002 or .003 . If you have a deep freezer this will work leave it in there about 4 hours or so . Our freezers our set at 95 below zero just for this app. There a special industrial in our Tool & Die department.

Originally Posted by bluestang67

At work we freeze press bearings alot . We use it on 6 to 8 inch bearing with a press fit of .002 or .003 . If you have a deep freezer this will work leave it in there about 4 hours or so . Our freezers our set at 95 below zero just for this app. There a special industrial in out Tool & Die department.

in out Metallurgy dept.

Originally Posted by 42K3

This stuff comes in handy for press fitting parts like GM power steering pumps. 5 minutes on dry ice will shrink the pump, 15 minutes in the oven @ 220 will expand the housing. Little grease and they pop together nicely. This week I will try it on cam bearings. Local grocery outlets carry it. Bring leather gloves if you are going to handle.
http://www.dryiceinfo.com/

And don't forget to roll you window down or carry it in the back of your pickup. The stuff is CO2 and it displaces oxygen. It'll make you dingy if you drive in a closed car with it.

It also blows up in water ........do not transport it in the rain.

Originally Posted by shawnlee28

It also blows up in water ........do not transport it in the rain.

And does it.
When I was in high school one day in machine shop we dropped some in a can of water that we'd been heating by sticking an old piece of cold rolled steel in and out of the kiln. I didn't see that much fog again until I made it to So. Cal.

Its also good for removing tile. Just place it on the tile and it freezes the thin set and pop goes the tile.

I know its the preffered noise maker of those who wish to make big booms,. ..even better than acetaline bombs!!!!

has anyone ever heard of using it to pop out hail dents? the way i heard is heat up dent with a heat gun and drop a piece of dry ice on the dent. just curious if it's bs or real

I am not a body man...but I do know heat exspands and cold contracts.Not sure how much more it would do than a wet rag?

You don't have to heat it first, thus you don't damage the paint.

WE use it in our area to put brands on cattle. Just the opposite of heat but will burn the hell out of em and when healed the brand if white. I also have some in the semen tank and that will sure make it small and VERY brittle. If you drop it after it's been in the juice it's broke. You use a styrofoam container and place the item you want to shrink in the container and pour nitrogin in it and cover. Won't take long but you do need a tank. Seems like it's 212 deg below sea level.

yes. it does work for dents. but heating the metal sounds like asking for trouble damage to both metal and paint. also makes cheap fog effects for halloween. of course, these days you'd probably be sued when a kid touched it and got hurt.

how about this...i need to replace the pitman arm on my '94 c1500 pickup. the nut on the sector shaft has been there since the truck rolled off the line in '93 and is, of course, stuck pretty securely. i was going to apply heat to the nut and expand it, but what about applying dry ice to the sector shaft instead? i know the nut would get cold, too, but maybe not at the same rate, if their compositions are slightly different. i just know that if i go at the thing with a breaker bar (can't find a 1-5/16" socket in 1/2" drive, anyway) i'll break something. i have a bad habit of snapping stuff.

Originally Posted by vortec

yes. it does work for dents. but heating the metal sounds like asking for trouble damage to both metal and paint. also makes cheap fog effects for halloween. of course, these days you'd probably be sued when a kid touched it and got hurt.

how about this...i need to replace the pitman arm on my '94 c1500 pickup. the nut on the sector shaft has been there since the truck rolled off the line in '93 and is, of course, stuck pretty securely. i was going to apply heat to the nut and expand it, but what about applying dry ice to the sector shaft instead? i know the nut would get cold, too, but maybe not at the same rate, if their compositions are slightly different. i just know that if i go at the thing with a breaker bar (can't find a 1-5/16" socket in 1/2" drive, anyway) i'll break something. i have a bad habit of snapping stuff.

On my dually chevy I could not get it off to replace the p/s box I was able to take the whole unit off and put it in my 12 ton press with split type bearing separator and it pop off with a big bang not sure I would of gotten it off any other way. as a matter of fact I was unable up to that point with my other attemps.

Originally Posted by vortec

yes. it does work for dents. but heating the metal sounds like asking for trouble damage to both metal and paint. also makes cheap fog effects for halloween. of course, these days you'd probably be sued when a kid touched it and got hurt.

how about this...i need to replace the pitman arm on my '94 c1500 pickup. the nut on the sector shaft has been there since the truck rolled off the line in '93 and is, of course, stuck pretty securely. i was going to apply heat to the nut and expand it, but what about applying dry ice to the sector shaft instead? i know the nut would get cold, too, but maybe not at the same rate, if their compositions are slightly different. i just know that if i go at the thing with a breaker bar (can't find a 1-5/16" socket in 1/2" drive, anyway) i'll break something. i have a bad habit of snapping stuff.

The nut should come off with a 1/2" impact wrench. As far as the pittman arm, the right puller of good quality should do it. Reassembly, pitman arm in the oven, dry ice on the shaft, presto. I've also done the Hydraulic press method, I think thats when I regrew some hair.