These bearings are an extended inner-ring type and have specially designed set screws with unique thread form
The thread form in both series locks the bearing to the shaft so they are resistant to loosening during operation
A positive contact, land-riding R-seal provides improved protection against harmful contaminants in both series and retains lubricant under severe operating conditions
A 6/6 molded nylon retainer has proved effective under conditions of misalignment
YA-RR series has cylindrical outside diameters
YA-RRB series has spherical outside diameters for use in housings with corresponding spherical inside surfaces This provides unrestricted initial self-alignment