Page 62 - needle bearings

Bearing Type Symbols and Auxiliary Symbols
NTN

Table 1.2.2 Auxiliary symbols

Symbol Symbol representation
TS- Bearing for high temperature application which was
heat-treated for dimensional stabilization
Initial symbols heat-treatment E- Bearing made of case-hardened steel
Plated bearing
Material
M-
symbols
F-
Bearing made of stainless steel
Bearing made of high speed steel
H-
C-
Expansion-compensated bearing
Expansion compensation EC- Bearing made of carbon steel
Basic symbols
Internal construction ZW Double-row cage
symbols A,B,C Internal construction change
J Steel plate punched cage
F1 Machined iron cage
L1 High-strengh yellow copper cage
Cage symbols T2 Polyamide resin cage
L3 Aluminum alloy cage
L5 Sintered alloy cage
S Welded cage
L,LL With synthetic rubber seal
Seal symbols
P,PP With plastic seal
K Bearing with 1/12 tapered bore
N Grooved snap ring
NR
With snap ring
Tail codes Bearing ring profile W Bearing ring with notched knock hole
symbols
D
With oil hole
D1
Cam follower with hexagon hole
H With oil hole and oil groove
D2,Dn Complex bearing using two or more same bearings
Combination symbols +Ћ With spacer
-P Without cross roller stud
C2 Clearance smaller than ordinary clearance
C3 Clearance larger than ordinary clearance
Clearance symbols
C4 Radial clearance larger than C3
NA Non-interchangeable clearance
P6 Bearing of JIS Class-6
Accuracy class
symbols P5 Bearing of JIS Class-5
P4 Bearing of JIS Class-4
/2A SHELL ALVANIA Grease 2
Lubrication symbols
/3A SHELL ALVANIA Grease 3
Special symbols V1ʙVn Special specification, requirements

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