Bearing pressing gone wrong how to recover

[Madmustang]

Hi,

I was prssing a bearing after I had done a few others. Got cockey and the last one went wrong. Does anybody know how to extract it before I go cutting it out?

 

[Thick Farmer]

Slide hammer?

 

[Zebbedee]

Is it going in or out? If it is the new one going in just press on the high side till it squares up

 

[Mursal]

I would put the casting in boiling water for a bit and try tapping the high side as above with a soft hammer. Or use a piece of flat mild steel between the bearing and hammer as a cushion.
Keep watching, if it refuses to go, stop and pull the bottom edge back out.
It shouldn't take much of a pull, then If it comes you can have a wee look at the casing and debur if necessary.

We've all been there ...............

 

[davieh3350]

I'd get a slide hammer with a nut and washer on the end and bring the low side up, dont want to crack the casting.
Theres an exhaust valve seat in upside down in the 3350... Was running low on pipe freeze co² when i was fitting them. Rushing and never checked it was right way round.. It was too far in before i stopped to see how it was going in. Battered it in and cut a new seat on it. oh the shame of it

 

[Ley253]

Cutting it out? MM best order a new casting then! Casting looks to be ally, if that the case, wait till the other half has gone out, and put casting in the oven roast for a while, remove and bearing should drop out, or as mentioned, square up with gentle massage on the high side.

 

[Madmustang]

Slide hammer?

Its a 40mm ID and my slide hammer inserts only go up to 30mm

 

[Madmustang]

Is it going in or out? If it is the new one going in just press on the high side till it squares up

I did try that then got cold feet when nothing happened and I am using a 6ton press

 

[Madmustang]

I would put the casting in boiling water for a bit and try tapping the high side as above with a soft hammer. Or use a piece of flat mild steel between the bearing and hammer as a cushion.
Keep watching, if it refuses to go, stop and pull the bottom edge back out.
It shouldn't take much of a pull, then If it comes you can have a wee look at the casing and debur if necessary.

We've all been there ...............

It has been in the oven but its not going in or out I have nothing to pull it either unless you can recomened a big enough tool

 

[Madmustang]

I'd get a slide hammer with a nut and washer on the end and bring the low side up, dont want to crack the casting.
Theres an exhaust valve seat in upside down in the 3350... Was running low on pipe freeze co² when i was fitting them. Rushing and never checked it was right way round.. It was too far in before i stopped to see how it was going in. Battered it in and cut a new seat on it. oh the shame of it

Its a blind bearing so I cant get behind it

 

[Madmustang]

Cutting it out? MM best order a new casting then! Casting looks to be ally, if that the case, wait till the other half has gone out, and put casting in the oven roast for a while, remove and bearing should drop out, or as mentioned, square up with gentle massage on the high side.

The old bearing was cut out. Yes its ally and it’s been in the oven a few time but it’s not budging. What temperature is safe as I have read anything over 200c will damage the ally

 

[Mursal]

Unless you heat the area of the casing around the bearing using a small blow torch (be careful), then freeze spray as @davieh3350 mentioned on the bearing? The oven might be heating everything and you have no pull on the bearing as it sits in the oven.


Consider welding a 12mm bolt (approx size) onto the lowest part of the bearing (the part of the bearing most in the casing) and make a frame to sit on the casing using a heavy wall steel pipe just slightly bigger than the bearing. So it sits on the casing right beside the OD of the bearing. The bolt will be sticking out the top of the pipe, so using a homemade heavy washer (10mm plate) to close the top of the pipe tighten a nut down. If you can work quick the heat of the welding will help with the extraction, believe it or not. Tighten the nut now allow the weld to cool down completely, checking the nut as it cools.

Still no joy, throw it in the oven, or heat casing / freeze bearing checking the nut as you go. Unfortunately it wont be pulling square like in the diagram, so weld the bolt so it pulls straight up.

Our old woodwork teacher would lock the glue away on us, until we did at least 2 dry runs of putting the wood joints together without glue. glue = weld

Hope this helps ...............

 

[marco]

Use a shaft the I d of the bearing. Pack grease or damp paper if the grease is getting out in the bottom of the bearing and strike the shaft. The shaft will force the grease to the back of the bearing and hopefully drive it out. There are videos on YouTube of the procedure.

 

[Madmustang]

Well I did it in two parts,
1st I put it in boiling water and tried to hammer it with a plate as suggested but that didn’t work. 2. So I thought I would put it back in the oven at a higher temp. The oven I was using goes up to 230c so I am guessing it runs cold and I don’t have a laser temp gauge so I cooked it for 30mins on full. I was then able to hammer the bearing straight with a piece of plate on top. Then I decided to press it again. Bad idea so I hammered it straight again then hammered it flat down. As I was doing that it just gave and fell into the case. Result, Thank you all for your suggestions

 

[joe soapy]

was scratching around the net, came across this ans thought of you

 

[powerfarmer]

I find a few well placed blows of a decent plastic tipped deadblow hammer is useful to put stray bearings back on track

 

[Madmustang]

was scratching around the net, came across this ans thought of you

Thanks all I need now is a 30 Amp supply, a welder, a lathe and those commie B******s won't stop me

 

[Mursal]

I don't think you'll get caught a second time ..........

 

[Netherfield]

Use a shaft the I d of the bearing. Pack grease or damp paper if the grease is getting out in the bottom of the bearing and strike the shaft. The shaft will force the grease to the back of the bearing and hopefully drive it out. There are videos on YouTube of the procedure.

I once used that idea to get a bearing race out of a Land Rover gearbox, I turned a piece of wood down on the lathe filled the hole with oil,then smacked the wood on the end, everything,including me got covered in oil, but lo and behold the race was lifted to the top of the housing. I seem to recall the idea was in a Haynes Manual.

 

[Mursal]

The older Haynes Manuals had great stuff in them, not so much now I don't think.
Like the Fig Rolls and the Wagon Wheels, everything getting smaller.