Need some help/tips on how to unfreeze a press fit.

[sofob0909]

Hey guys,

I am looking to replace the bearings on my machine and I need some tips/tricks on how to get the bearings off the axle.

I removed the set screws and tried heating. (i tried to keep the heat on the bearing and not the shaft.) I got it so hot that there was bubbling coming out from where the shaft and bearing connect.

Repeated 3x on the heating and still NO SIGN of motion.

Does anyone have any other tricks?

I will try to take some pictures of the setup to help explain.


EDIT:
bearing is a 1013krrb with two 52MSC2 flanges around it.

[MaxRules]

A 20 ton shop press will usually remove bearings from the axle. You can also use a grinder with a cut-off wheel to cut the bearings right down to the axle, making them slide off easily.

[Twizted1]

A 20 ton shop press will usually remove bearings from the axle. You can also use a grinder with a cut-off wheel to cut the bearings right down to the axle, making them slide off easily.

If you use a cut off wheel be careful of the axle. When you get almost all the way thru it, take a chisle to the cut and give the chisel a good smack with a hammer. It should open right up & slide right off.

[sofob0909]

The problem is that I cant get to the inside of the bearing to cut it. I can only get at it from the outside.

The axle is still in the machine and I dont know if I can get replacement flanges for the bearings. does anyone know where i can get 52msc2 flanges. also if anyone knows of a good place to get bearings too it would be helpful.

(1013krrb with two 52MSC2 flanges around it)

[Mike]

Remove the bolts that hold the flanges together. Then slide the axle out with the bearing on it as far as you can. This will let the bearing move away from the flange where you can then cut it off. Start by cutting through the outer race. Then the ball bearings will fall off and you can cut almost through the inner race. Then use the chisel like twizted1 mentioned. You may have to do this on two sides of the inner race if the first cut / chisel doesn't free it.

As for bearings and flanges, if you will search the site there are several places that people recommend. Your local bearing supply house will have them or you can Google the bearing number and find what you are looking for very easily: https://www.google.com/search?q=52ms...w=1263&bih=803

[sofob0909]

thanks mike.

The axle doesnt move at all!. I only have access to the outside on both sides. I was able to get the outer flange off so I may be able to cut the bearing off.

I will try the cutoff wheel this week.



Here is a picture of what I can access.

There is another on on the other side as well.

[msafi65]

if your axles are out wrap the bearing in a heavy layer of cloth and break outer race with a hammer on an anvil or solid support. this is faster and easer on your cuttoff wheels. If you dont want cut inner race CAREFULLY with a cut off wheel and have aceteylene torch. heat a read spot the size of a nickel and hit the hot spot with ball end of hamer while still red. The race will grow quite a lot and should be loose. I have used this method on very large bearings with no damage to shafts.

Oops Just saw pics of axle. I would reinstall the nut to protect threads,then with a very heavy hammer or steel block against bottom of outer race, hit race on other side. they break pretty easy.Wear gloves and goggles the pieces of race can be very dangerous.Turn race and break again if necessary. Once outer race and balls are out axle should at leaste move. Inner race will still have to come off to remove axle. A dremel with small cut off wheel will cut inner race with time. Good luck

[sofob0909]

thanks,

msafi65. dont have the ability to remove the axle so I am stuck with cutoff wheels.

[ARGOJIM]

From what I see in the pic I'll ass/u/me there are bearings on either side of that chain box which looks fiberglass. My suggestion as I just did similar 5 times today is to get a large chisel and break the outer race off in 2 places, then as Mike said the balls fall out and you could slide the shaft side to side some and remove the race with a 3 jaw puller.