Designation system
The designations of most SKF rolling bearings follow a system that may consist of a basic designation with or without one or more prefixes and/or suffixes (→ Basic bearing designation system).
An example and the applicable options for cam followers are given below.
| PWKRE 47.2RS
| where | PWKRE 47 = |  |
| .2RS = |  |
 | Prefixes (n.a.) |
|
| Basic designation |
| KR
| Cam follower fitted with a needle roller and cage assembly
|
| KRE
| Cam follower fitted with a needle roller and cage assembly, with an eccentric collar pressed onto the stud
|
| KRV
| Cam follower fitted with a full complement of needle rollers
|
| KRVE
| Cam follower fitted with a full complement of needle rollers, with an eccentric collar pressed onto the stud
|
| NUKR
| Cam follower based on a double row full complement cylindrical roller bearing with two integral outer ring flanges
|
| NUKRE
| Cam follower based on a double row full complement cylindrical roller bearing with two integral outer ring flanges, with an eccentric collar pressed onto the stud
|
| PWKR
| Cam follower based on a double row full complement cylindrical roller bearing with three integral outer ring flanges
|
| PWKRE | Cam follower based on a double row full complement cylindrical roller bearing with three integral outer ring flanges, with an eccentric collar pressed onto the stud
|
| Suffixes - Internal design (n.a.) |
| Suffixes - External design (seals, snap ring groove, etc.)
|
| .2RS | NBR contact seal on both sides
|
| A
| Improved crowned profile of the outer ring running surface (NUKR design) |
| B
| Hexagonal recess on both ends of the stud
|
| PPA
| KR design with a PA66 axial sliding and sealing ring on both sides; improved crowned profile of the outer ring running surface
|
| PPSKA
| KR design, sizes 16 and 19, with a PA66 axial sliding and sealing ring on both sides, improved crowned profile of the outer ring running surface and a hexagonal recess in the head of the stud, no relubrication features
|
| PPXA
| PPA features except for the outer ring running surface, which has a cylindrical profile |
| X
| Cylindrical (flat) profile of the outer ring running surface
|
| XA
| Cylindrical (flat) profile of the outer ring running surface (NUKR .. A or NUKRE .. A design) |
| XB
| Cylindrical (flat) profile of the outer ring running surface and a hexagonal recess on both ends of the stud (NUKR design)
|
| Suffixes - Cage design (n.a.) |
