8 replies to this topic

[mini-mad-mark]

Just got the latest issue and reading the article about hub refurb (ball joints and bearings)

 

Is it me or does picture 34 (p73) look like inner race assembly is being used to press in the outer race ? (its a small pic)

 

For those who don't know, this is a no-no. (although you may get away with it, it can cause brinell marks on the outer race and these may lead to subsequent bearing damage  - google "brinelling" for a detailed explanation of the mechanism (note - not "false" brinelling which is a different damage mechanism)

[Spider]

I was taught and have always used a dolly of softer material, eg, Brass, Copper, Aluminum and where possible, press the bearings in.

[nicklouse]

Just got the latest issue and reading the article about hub refurb (ball joints and bearings)

 

Is it me or does picture 34 (p73) look like inner race assembly is being used to press in the outer race ? (its a small pic)

 

For those who don't know, this is a no-no. (although you may get away with it, it can cause brinell marks on the outer race and these may lead to subsequent bearing damage  - google "brinelling" for a detailed explanation of the mechanism (note - not "false" brinelling which is a different damage mechanism)

Good old Brinelling or indexed steering as we called it in the cycle world. 

[steeley]

Wow, that’s a term I haven’t heard since being at college during my apprenticeship in mid eighties

[Pete649]

I like to remove old bearings myself by carefully drifting them out, inspecting the hub/housing for damage or wear then getting new ones pressed in by a local machine shop.

[MiNiKiN]

Just got the latest issue and reading the article about hub refurb (ball joints and bearings)

 

Is it me or does picture 34 (p73) look like inner race assembly is being used to press in the outer race ? (its a small pic)

 

For those who don't know, this is a no-no. (although you may get away with it, it can cause brinell marks on the outer race and these may lead to subsequent bearing damage  - google "brinelling" for a detailed explanation of the mechanism (note - not "false" brinelling which is a different damage mechanism)

Admit it - you are a railway man! that terminology (brinelling, false-brinelling, spalling, you name it) is so very much associated for me with the many bearing assessments I had done to prolong service-life of the Desiro Class 350, etc.)

[Cooper Mac]

 

Just got the latest issue and reading the article about hub refurb (ball joints and bearings)

 

Is it me or does picture 34 (p73) look like inner race assembly is being used to press in the outer race ? (its a small pic)

 

For those who don't know, this is a no-no. (although you may get away with it, it can cause brinell marks on the outer race and these may lead to subsequent bearing damage  - google "brinelling" for a detailed explanation of the mechanism (note - not "false" brinelling which is a different damage mechanism)

Admit it - you are a railway man! that terminology (brinelling, false-brinelling, spalling, you name it) is so very much associated for me with the many bearing assessments I had done to prolong service-life of the Desiro Class 350, etc.)

 

They are just common engineering terms! We use those terms at work all the time, and we don't make anything for trains! 

 

Also, all apprentices are taught to fit bearings without a press, just using drifts and hammers, it's the only way to do it right, as when it is fitted with a press, you cant guarantee that it is fully home and sat level, but you can if you listen....... 

[cal844]

I have used the press alot for bearings, it's much quicker than drifting them in and out. I simply make sure it's all square and take it easy observing the pressure guage. If the guage loads early there's an issue. Again it's all in the feel and observation of the operators

[mini-mad-mark]

 

 

Just got the latest issue and reading the article about hub refurb (ball joints and bearings)

 

Is it me or does picture 34 (p73) look like inner race assembly is being used to press in the outer race ? (its a small pic)

 

For those who don't know, this is a no-no. (although you may get away with it, it can cause brinell marks on the outer race and these may lead to subsequent bearing damage  - google "brinelling" for a detailed explanation of the mechanism (note - not "false" brinelling which is a different damage mechanism)

Admit it - you are a railway man! that terminology (brinelling, false-brinelling, spalling, you name it) is so very much associated for me with the many bearing assessments I had done to prolong service-life of the Desiro Class 350, etc.)

 

They are just common engineering terms! We use those terms at work all the time, and we don't make anything for trains! 

 

Also, all apprentices are taught to fit bearings without a press, just using drifts and hammers, it's the only way to do it right, as when it is fitted with a press, you cant guarantee that it is fully home and sat level, but you can if you listen....... 

 

 

 

As mentioned by CooperMac they are common bearing terms regardless of industry but..... Guilty on both counts! - working with bearings for trains was my gainful employment until my financial advisor told me I could afford to "change" jobs.

 

Since Jan 1st I am now a full time project manager of house renovations (I'm doing up my kitchen!) and automotive repairs (working on the three minis!)