Page 954 - Rollingbearings
P. 954
Designation system
15 Support rollers
Designation system
Group 1 Group 2 Group 3 /
15
Preixes
R Support roller without an inner ring
Basic designation
NA 22 Support roller without a lange ring, itted with a needle roller and cage assembly
STO Support roller without a lange ring, itted with a needle roller and cage assembly
NATR Support roller with two pressed-on lange rings, itted with a needle roller and cage
assembly
NATV Support roller with two pressed-on lange rings, itted with a full complement of needle
rollers
NUTR Support roller based on a double row full complement cylindrical roller bearing with two
integral outer ring langes and a loose lange ring on both sides of the inner ring
NNTR Support roller based on a double row full complement cylindrical roller bearing with
three integral outer ring langes and a loose lange ring on both sides of the inner ring
PWTR Support roller based on a double row full complement cylindrical roller bearing with
three integral outer ring langes and a loose lange ring on both sides of the inner ring
Sufixes
Group 1: Internal design
Group 2: External design (seals, snap ring groove, etc.)
.2RS NBR contact seal on both sides
.2ZL Lamellar seal on both sides
A Improved crowned proile of the outer ring running surface (NUTR design)
PPA PA66 axial sliding and sealing ring on both sides Improved crowned proile of the outer
ring running surface
PPXA PA66 axial sliding and sealing ring on both sides Cylindrical (lat) proile of the outer ring
running surface
X Cylindrical (lat) proile of the outer ring running surface
Group 3: Cage design
TN Glass ibre reinforced PA66 cage
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