hello all,

new 40mm id bearings arrived today , they lack the locating peg ,that stops the bearing rotating in the spherical mount cast  block .my concern is the bearing spinning in the block ,and wearing it .is this a new approach to have no peg on the outer surface ?

thanks
robert

http://www.youtube.com/user/legrandphromage

Is this a ball, roller or sleeve bearing?  Is it lubricated with oil or grease?  Have you looked at similar bearing designs from other manufacturers?

For a bearing this small, I assume it is a ball bearing. It is probably grease lubricated.  I do not consider it unusual that it lacks an anti-rotation pin. Most of the radial bearings in API pumps have a similar radial ball bearing with no pin stopping the outer race from spinning within the housing.  Those bearings are in a cylindrical bore rather than a spherical seat. But, I don't see any reason why this would make a difference.  
 

Johnny Pellin

ball bearing ,johnny, the previous bearings had a pin ,and they are greased.my concern is that a spherical bearing is a sliding fit ,so could perhaps get up some rpm and wear into the block.

http://www.youtube.com/user/legrandphromage

If the load is strongly one directional, either from gravity or a drive belt, etc, the tendency for the outer race to "spin" (creep, really) is pretty small. Bearing fits spedified in bearing catalogs reflect this.

If the load direction continually varies in direction a pin won't prevent the micromotion. That's why keyed shafts by themselves don't last long.
 http://www.miata.net/garage/hsue/Loctite%20Crank%20Fix%20-%20Part%201_files/crank5.jpg

its a set of rollers in a chassis dyno , so anything from 200 kg up on two bearings per roller . the bearing is  self aligning type ,so spherical outer ,which can rotate fairly freely in the huosing as normal ,hence i assume the pin ?

http://www.youtube.com/user/legrandphromage

Most pillow blocks do not have an anti rotation pin in the outer diameter anymore.  This was typical of Asian style housings, I think Asahi units might still have them.  Most now have a transition fit between the spherical outer and the casting, like RHP.  It shouldn't be too loose, but you should be able to rotate it by hand with some effort.
What brand is it?

thank for that i'll fit them then .its K.S.M brand ,caoimhin1.

http://www.youtube.com/user/legrandphromage

just to finish this off ,

 after a fair bit of research by the supplier and i , it appears this peg is a bit of an unknown .some makes of bearings have it , some dont .the ones that dont work perfectly well .sometimes its associated with the grease hole being kept in a certain area ,so it would be fitted to a bearing that has no lube groove all around it . but some bearings have a groove ,and a peg !.

regards
robert

http://www.youtube.com/user/legrandphromage