ball bearing to roller brg.

If you can control end play along with axial movement, you should be alright. If done correctly, tapered roller bearings should have greater load capacity than ball bearings.

Hello "Guest",

Please note that a ball-race unit is capable of higher shaft speeds than a tapered roller unit.

Advise the shaft RPM of your centrifugal separator, also the old ball-race # and the new tapered roller # for comment.

Kind Regards....

Hello

Please specify serial number of original bearings and of bearing installed. Need this information to compare the characteristics of both bearings.

Taper roller bearings are NOT selfaligning. there is a risk of internal loads due to the lack of this function. Internal lods can be so high that the bearings will be short life.

Hello nick name

Self-aligning tapered roller bearings offer important user benefits in performance and cost reduction - advantages not found in one-piece housings.

Kind Regards....

For me a taper roller bearing consists of two conical rings with a series of conical rollers. If the bearing is put in a oscillating support it is a pillow not a simple bearing. It is of course possible to have the outer ring spherical and bring a supplementary degree of freedom. I would like to have abetter picture have an address?

Hi Sparky,

Since you did not answer my request and since when something comes up in contradiction with what I know I try to make it clear in order to correct my knowledge I used a visit on a show to discuss the problem with a worldwide known bearing manufacturer (it is an european manufacturer so that it could be possible that you do not accord your confidence in which case I recommend to consult Timken which is an american manufacturer in fact the first to supply tapered roller bearings).

His conclusion is that you (or the source you used) misused the definition of a tapered bearing. According to the definition the bearing is named after the form of its rollers. When the rollers are conical it is a tapered bearing. A conical roller work with 2 conical rings and thus CANNOT be self aligning.

But there are bearings (especially) used for pillows which have rollers as a barrel and work with a spherical outer ring allowing a self alligning function. Some of those bearings have an inner ring with an internal tapered hole. A tapered bushing is used to fix the shaft position with a nut pulling the bushing and generating due to the low angle a quite important radial pressure between bushing, ring and shaft. This kind of bearings is sometimes WRONGLY called tapered roller bearings. They should be named bearing with a tapered hole.

Your reaction when you corrected me shows that it is not always good to believe what internet shows if you do not filter and base the comment on a personnal experience.

Hello nick name

I don't answer every request immediately, as this Forum is not the only one I subscribe to, and am limited to 24 hours each day.

Your Original Post states:

<"....i will give bearing details....">

You didn't bother to give those details.

Nor have you supplied Bearing Numbers for the Original equipment bearings or the replacements, as I asked - refer: http://cr4.globalspec.com/comment/276065/Re-ball-bearing-to-roller-brg

It is good to see you did further research yourself, and that is the best way to learn.

So...What bearing/s are you going to use in your separator?

Members here are interested.

Reply here, with

Kind Regards....

I am sorry to note that you mix things.

I was NOT the one to ask for a counsel for the separator.

Hello nick name

My apology to you.

It is confusing at sometimes, with Posters listed as "Guest".

Sometimes a "Guest" Poster is a Member who has not Logged in.

Kind Regards....

With the numbers of comments I can very well understand and imagine that you spend most of your time in front of the screen.

Hello again, nick name

Not entirely true, although my daily Postings here and elsewhere have run into more than 400 in a day at times, and at other times I am also quite busy away from my office.

Comments/replies are often easy to make, more so if a reply is in the area of practical experience.

Some Engineers have limited experience, others have very wide experience.

Experiences come from "working in the field", and as the years roll by, the accumulated experiences level normally increases too, because often the problem/similar problem for another has been met before, or basic reasoning is used to modify a solution.

It is sometimes quite difficult for some younger Engineers to expand their experience base, particularly if they remain with a single Company or Consulting Firm.

The old saying:"You can't put an old head on young shoulders" does hold true, to a degree.

Kind Regards....