Identifikations- und Nachsetzzeichen von IKO

C

Material

cemented steel for outer ring 

F

stainless stell for bearing and rolling elements 

N

Cage 

made of synthetic resin 

V

no cage or full complement 

Z

Seal or shield 

with dust cover on one sides 

ZZ

with dust cover on both sides 

U

with seal on one side  

UU

with seal on both sides 

2RS

with seals on both sides  

NR

bearings ring shape

with stop ring on outer surface of outer ring  

OH

with oil hole in bearing ring 

this differs according to type of bearing 

J

no oil hole 

C2

clearance symbol

lower clearance than normal 

interchangeable-needle roller bearing   

(none)

normal clearance  

s.o.

C3

higher clearance than normal

s.o.

C4

higher clearance than C3 

s.o.

C5

higher clearance than C4

s.o.

C2NA

lower clearance than normal 

non-interchangeable-needle roller bearing 

NA

normal clearance 

s.o.

C3NA

higher clearance than normal

s.o.

C4NA

higher clearance than C3

s.o.

C5NA

higher clearance than C4

s.o.

T1

special radial clearance 

crossed Roller Bearing 

C1

special radial clearance 

C2

special radial clearance 

(none)

 Classification

JIS Class 0

P6

JIS Class 6

P5

JIS Class 5

P4

JIS Class 4

P

IKO accuracy class: Precision class