Best options for fixing this

[minimutly]

Simple really - needle roller bearing, some deep pitting. Is this a metal spraying job, or a sleeve, or something else?

 

[gaz1]

that apears to be a weld repair

or known as homemade arbor

marks on shaft apear wrong for a jamed material

 

[Morrisman]

Isn’t that the inner sleeve, of the bearing, and removable?

Eta. Or is the groove in the narrow diameter the problem?

 

[Brad93]

Cold Metal spray all wrong for that I'm afraid.

Spray and Fuse would work but would need grinding, you won't turn it down easily to a nice finish.

If you want minimal distortion or softening of the original I presume heat treated spindle, Laser cladding would be my preference. Flipping expensive though.

 

[Brad93]

Could spray a 38-40HRC powder, fuse it in, machine the bulk off with PCD or CBN insert, then send off for grinding.

 

[8ob]

SKF do an inner repair ring, you could grind/turn shaft to size and press one of those on. https://www.skf.com/uk/products/ind...inner-rings-non-directionally-ground-raceways

Bob

 

[Brad93]

SKF do an inner repair ring, you could grind/turn shaft to size and press one of those on. https://www.skf.com/uk/products/ind...inner-rings-non-directionally-ground-raceways

Bob

They're for seals as far as I know, not suitable for roller bearings to act directly on. Like a Speedi Sleeve

 

[8ob]

They're for seals as far as I know, not suitable for roller bearings to act directly on. Like a Speedi Sleeve

Yes wrong link Brad, what I was getting at is you can get an inner track for a needle roller, so may be easier to grind/turn the shaft and press one of those on, https://www.bearingsrus.co.uk/nao25...MI5qeW0JOi9QIVCeDtCh0wLgmjEAQYASABEgItkPD_BwE

 

[Brad93]

Yes wrong link Brad, what I was getting at is you can get an inner track for a needle roller, so may be easier to grind/turn the shaft and press one of those on, https://www.bearingsrus.co.uk/nao25...MI5qeW0JOi9QIVCeDtCh0wLgmjEAQYASABEgItkPD_BwE

Yes yes that would work. Grind shaft smaller and then use smaller ID bearing. Obviously depends how much meat on shaft there is.

 

[minimutly]

SKF do an inner repair ring, you could grind/turn shaft to size and press one of those on. https://www.skf.com/uk/products/ind...inner-rings-non-directionally-ground-raceways

Bob

Thanks for all suggestions, this is water damage.
@8ob has my preferred option, the critical bit is the wide bit, where the needle roller runs. Tbh, it's running quietly, but I haven't loaded it up yet. I might consider making my own ring, hardening it and then shrinking it on - what could go wrong?

NAO25x42x16 SKF Needle Roller Bearing With Machined Rings With Flanges, With Inner Ring 25x42x16mm Needle roller bearings without an inner ring are an excellent choice for compact bearing arrangements if the shaft can be hardened and ground. Eliminating the need for a separate inner ring enables a larger shaft diameter and a stiffer bearing arrangement. Axial displacement of the shaft relative to the housing is only limited by the width of the raceway on the shaft. By machining the shaft raceways to the appropriate dimensional and geometrical accuracy, it is possible to obtain bearing arrangements with heightened running accuracy.

(Quote from the site @8ob pointed to). This is 2 inch dia or so, int 30, and strength is important. The needles in mine are tight packed, the more the better I say?

 

[minimutly]

Thanks for all suggestions, this is water damage.
@8ob has my preferred option, the critical bit is the wide bit, where the needle roller runs. Tbh, it's running quietly, but I haven't loaded it up yet. I might consider making my own ring, hardening it and then shrinking it on - what could go wrong?

NAO25x42x16 SKF Needle Roller Bearing With Machined Rings With Flanges, With Inner Ring 25x42x16mm Needle roller bearings without an inner ring are an excellent choice for compact bearing arrangements if the shaft can be hardened and ground. Eliminating the need for a separate inner ring enables a larger shaft diameter and a stiffer bearing arrangement. Axial displacement of the shaft relative to the housing is only limited by the width of the raceway on the shaft. By machining the shaft raceways to the appropriate dimensional and geometrical accuracy, it is possible to obtain bearing arrangements with heightened running accuracy.

(Quote from the site @8ob pointed to). This is 2 inch dia or so, int 30, and strength is important. The needles in mine are tight packed, the more the better I say?

I guess I could look into a bearing with the same outer but smaller inner, and grinding that to size.

 

[gaz1]

Thanks for all suggestions, this is water damage.

you would have pitting with water damage and that dosnt have it

instead it has a mark all the way around it but its not a chucnk of metal digging in as it would have a more mark uniform taht appears to be a weld mark but turning it around

 

[Pete.]

If we're talking about the larger OD with the lines on it that's definitely corrosion damage where the rollers have been staic over time, and somewhat damp.

 

[minimutly]

If we're talking about the larger OD with the lines on it that's definitely corrosion damage where the rollers have been staic over time, and somewhat damp.

It's water damage. I may be stupid, but not that stoopid...

Isn’t that the inner sleeve, of the bearing, and removable?

Now, that wasn't someting I checked, but assumed for maximum strength it would be rollers running on the shaft.
Hmmm, will have to pull it again.

 

[Brad93]

Thanks for all suggestions, this is water damage.
@8ob has my preferred option, the critical bit is the wide bit, where the needle roller runs. Tbh, it's running quietly, but I haven't loaded it up yet. I might consider making my own ring, hardening it and then shrinking it on - what could go wrong?

NAO25x42x16 SKF Needle Roller Bearing With Machined Rings With Flanges, With Inner Ring 25x42x16mm Needle roller bearings without an inner ring are an excellent choice for compact bearing arrangements if the shaft can be hardened and ground. Eliminating the need for a separate inner ring enables a larger shaft diameter and a stiffer bearing arrangement. Axial displacement of the shaft relative to the housing is only limited by the width of the raceway on the shaft. By machining the shaft raceways to the appropriate dimensional and geometrical accuracy, it is possible to obtain bearing arrangements with heightened running accuracy.

(Quote from the site @8ob pointed to). This is 2 inch dia or so, int 30, and strength is important. The needles in mine are tight packed, the more the better I say?

Would it not be better to find equivalent taper roller or double angular contact from timken

 

[Pete.]

It's water damage. I may be stupid, but not that stoopid...

Now, that wasn't someting I checked, but assumed for maximum strength it would be rollers running on the shaft.
Hmmm, will have to pull it again.

Of course, I'm agreing with you.

I'm also thinking that Morrisman has hit on something there as the joint line seems to serve no purpose except for being a shoulder for the inner race to sit against.

 

[minimutly]

Would it not be better to find equivalent taper roller or double angular contact from timken

No Brad, not enough room for anything other than a needle roller..

 

[minimutly]

Of course, I'm agreing with you.

I'm also thinking that Morrisman has hit on something there as the joint line seems to serve no purpose except for being a shoulder for the inner race to sit against.

Yes, and there is also a step in diameter - why would that be there otherwise?
It's easy to drop out, so will have a closer look.

 

[Brad93]

No Brad, not enough room for anything other than a needle roller..

What takes the axial load?

 

[Pete.]

What takes the axial load?

Probably a stack of bearings above those ones. My TOS is exactly the same.