Item

Symbol

Description

Seal type

ZZ

Metal shields on both sides.

2RS

Rubber seals on both sides.

Z

Metal shield on one side.

RS

Rubber seal on one side.

Radial internal clearance

CN

Normal clearance. It is not indicated as a standard.

C2

Less than normal.

C3

Greater clearance than normal.

C4

Greater than C3.

C5

Greater than C4.

Cage type

M

Brass cage, ball guided.

MB

Brass cage, inner ring centered.

MA

Brass cage, outer ring centered.

Speed ratings

V

Normal vibration level. It is not indicated as a V standard.

V1

Lower vibration level than normal.

V2

Lower vibration level than V1.

V3

Lower vibration level than V2.

V4

Lower vibration level than V3.

Tolerances

P0

Normal tolerance level. It is not indicated as a P0 standard.

P6

Greater tolerance level than P0.

P5

Greater tolerance level than P6.

Other technical modifications

NR

Groove with inserted snap ring in outer ring.

N

Snap ring groove in the outer ring.

SS

Stainless steel.