when the roller thing was hashed out some time back, that's the dimensions I noted, from searching the net and talking to my NAPA they are not identical replacement for the ball bearings, but if you add 'R' to the ball numbers [to indicate rollers] you may find someone with some NOS around, they were made at one time

other discussions about the rollers:
the HAMB .... Classic Parts forum .... the 67-72 forum

and for the record: a PDF catalog listing ball/roller interchange and applications .... a Chinese supplier with dimensions .... an e-bay seller .... a rod shop supplier that appears to source them from CPP, who may be distributing the Chinese version .... I ran across a note somewhere that the reason MBS bearings aren't common is they got fined for a "dumping" trade violation some years ago

Bill

Moved over to the Passing Lane

"When we tug a single thing in nature, we find it attached to the rest of the world" ~ John Muir
"When we tug a single thing on an old truck, we find it falls off" ~ me
Some TF series details & TF heater pics