Page 978 - Rollingbearings
P. 978
Designation system
16 Cam followers
Designation system
Group 1 Group 2 Group 3 /
Preixes
16
Basic designation
KR Cam follower itted with a needle roller and cage assembly
KRE Cam follower itted with a needle roller and cage assembly, with an eccentric collar
pressed onto the stud
KRV Cam follower itted with a full complement of needle rollers
KRVE Cam follower itted 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 langes
NUKRE Cam follower based on a double row full complement cylindrical roller bearing with two
integral outer ring langes, 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 langes
PWKRE Cam follower based on a double row full complement cylindrical roller bearing with three
integral outer ring langes, with an eccentric collar pressed onto the stud
Sufixes
Group 1: Internal design
Group 2: External design (seals, snap ring groove, etc.)
.2RS NBR contact seal on both sides.
A Improved crowned proile of the outer ring running surface (NUTR 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
proile of the outer ring running surface
• Sizes 16 and 19 have one slot in the head of the stud as standard.
• Sizes ≥ 22 have a hexagonal recess on both ends.
PPSKA KR design, sizes 16 and 19, with a PA66 axial sliding and sealing ring on both sides,
improved crowned proile 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 proile
X Cylindrical (lat) proile of the outer ring running surface
XA Cylindrical (lat) proile of the outer ring running surface (NUKR .. A or NUKRE .. A design)
XB Cylindrical (lat) proile of the outer ring running surface and a hexagonal recess on both
ends of the stud (NUKR design)
Group 3: Cage design
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