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Prefix |
|
|
L |
Removable inner or outer ring of a separable bearing |
|
R |
Bearing without removable inner or outer ring (only suitable
for needle roller bearingsof type NA) |
|
K |
Roller and cage assembly |
|
WS |
Shaft washer of a cylindrical roller thrust bearing |
|
GS |
Housing washer of a cylindrical roller thrust bearing |
|
KOW |
Thrust bearing without shaft washer |
|
KIW |
Thrust bearing without housing washer |
|
LR |
Bearing with removable inner ring or outer ring and rolling
elements assembly |
| |
|
|
Suffix |
|
|
Internal design |
|
A |
Deviating or modified internal design |
|
B |
Standard type (the design contents can be altered according
to different bearing structures) |
|
C Example: |
B indicates nominal contact angle a = 40 for angular contact
ball bearings, and it |
|
D |
indicates the increased contact angle for tapered roller
bearings. C indicates nominal |
|
E |
contact angle a = 15 for angular contact ball bearings. E
indicates the reinforce bearings. |
|
AC |
Nominal contact angle a =25 for angular contact ball
bearings |
|
D |
Split bearings |
| |
|
|
Codes of seats, shields and external designs |
|
K |
Tapered bore, taper 1:12 on diameter |
|
K30 |
Tapered bore, taper 1:30 on diameter |
|
R |
Bearing with flanged outer ring |
|
N |
Bearing with snap ring groove in outer ring |
|
NR |
Bearing with snap ring groove in outer ring and snap ring |
|
-RS |
Embedded case rubber seal at one side of the bearing (rubbing
seal) |
|
-2RS |
Embedded case rubber seals at both sides of the bearing
(rubbing seal) |
|
-RZ |
Embedded case rubber seal at one side of the bearing(non-rubbing
seal) |
|
-2RZ |
Embedded case rubber seals at both sides of the bearing
(non-rubbing seal) |
|
-Z |
Bearing with shield at one side |
|
-2Z |
Bearing with shields at both sides |
| |
|
|
Codes of bearing materials |
|
/HE |
Rings, rolling elements and cages, or only rings and rolling
elements, made of electroslagrefined bearing steel ZGCr15,
ZGCr15SiMn |
|
/HA |
Rings, rolling elements and cages, or only rings and rolling
elements, made of vaccum arc-melted steel |
|
/HU |
Rings, rolling elements and cages or only ring and rolling
elements, made of unable hardening stainless steel lCr18Ni9Ti |
|
/HV |
Rings, rolling elements and cages, or only ring and roiling
elements, made of hardening stainless steel (/HV-9Crl8,
/FM-9Crl8Mo) |
|
/HN |
Rings and rolling elements, made of heat-resisting bearing
steel (/HN-Cr4Mo4V, /HNI-Cr 14Mc)4, /liN2-Crl5Mo4V,
/1-fN3-Wl8Cr4V) |
|
/HC |
Rings rolling elements, or only rolling elements, made of
carburized steel (/HC-2OCr2Ni4 A, /HCI-2OCr2MoA, /liC2-15Mn) |
|
/HP |
Rings and rolling elements, made of beryllium bronze or other
anti-magnetic matertials. |
|
/HG |
Rings and rolling elements, or only rings, made of other
bearing steels (HG-5CrmnMo, /HG1-55SiMoVA) |
|
F |
Solid cage, made of steel, nodular cast iron or powder
metallurgy, the additional figure indicates the different
materials |
|
|
Fl-carbori steel, F2-graphite steel, F3-nodular cast iron,
F4-powder metallurgy |
|
Q |
Bronze solid cage, the additional figure indicates the
different materials |
| |
Q1-ferro-aluminium manganese bronze, Q2-ferro-silicon zinc
bronze, |
| |
Q3-nichrome silicon bronze, Q4-alurninium bronze |
|
M |
Brass solid cage |
|
L |
Light alloy solid cage, the additional figure indicates the
different materials L-LY11CZ, L1-LY12CZ |
|
T |
Phenolic resin solid cage |
|
TH |
Glass-fibre-reinforced phenolic resin cage (basket type) |
|
TN |
Moulded cage with engineering plastic, the additional figure
indicates the different |
| |
materials TNI-nylon, TN2-polysulfone, TN3-polyimide
TN4-polycarbonate, TN5-polyfoffnal dehydez |
|
J |
Pressed steel plate cage, the additional figure indicates the
different materials |
|
Y |
Pressed brass plate cage, the additional figure indicates the
different materials |
|
SZ |
Cage is made of spring steel wire or spring plate |
|
V |
Full complement beating (without cage) |
| |
|
|
Tolerance and clearance |
|
/P6 |
Tolerance class conforms to standard group 6 |
|
/P6X |
Tolerance class conforms to standard class 6x |
|
/P5 |
Tolerance class conforms to standard class 5 |
|
/P4 |
Tolerance class conforms to standard class 4 |
|
/P2 |
Tolerance class conforms to standard class 2 |
|
/Cl |
Internal clearance conforms to standard group 1 |
|
/C2 |
Internal clearance conforms to standard group 2 |
|
/C3 |
Internal clearance conforms to standard group 3 |
|
/C4 |
internal clearance conforms to standard group 4 |
|
/C5 |
Internal clearance conforms to standard group 5 |
|
/C9 |
Bearing internal clearance differs from the present standard,
the tolerance class and clearance can be simplified into
/P63R43, when they need to be expressed simultaneously |
|
|
|
|
Codes of bearing arrangement |
|
/DB |
Back-to-back arrangement |
|
/DF |
Face-to-face arrangement |
|
/DT |
Tandem arrangement |
| |
|
|
Other bearing features |
|
/Z |
limited values of the vibration acceleration level, the
additional figures indicate the different limited values, as
Z1, Z2, Z3 |
|
/V |
Limited values of the vibration speed level, the additional
figures express the different values, as V1, V2, V3 |
|
/S0 |
The bearing rings are tempered through heat treatment, and
the operating temperature is up to 150 C |
|
/SI |
The bearing rings are tempered through heat treatment, and
the operating temperature is up to 200 C |
|
/S2 |
The bearing rings are tempered through heat treatment, and
the operating temperature is up to 250 C |
|
/S3 |
The bearing rings are tempered through heat treatment, and
the operating temperature is up to 300 C |
|
/S4 |
The bearing rings are tempered through beat treatment, and
the operating temperature is up to 350 C |
|
/W20 |
The bearing with three lubrication holes in outer ring |
|
/W26 |
The bearing with six lubrication holes in outer ring |
|
/W33 |
The bearing with a lubrication groove and six lubrication
holes in outer ring |
|
/W33X |
The bearing with three lubrication holes and six lubrication
holes in outer ring |
|
/AS |
The beating with lubrication hole in outer ring, the
additional figure shows the numbers of oil hole (used for
needle roller hearings) |
|
/IS |
The bearing is filled with special grease for high
temperature, grease quantities differ from the standard
filling are identified by an additional letter |
|
/HT |
The bearing is filled with special grease for high
temperature, grease quantities differ from the standard
filling are identified by an additional letter |
| |
A:: grease quantity is less than standard filling |
| |
B: grease quantity is more than standard filling |
| |
C: full quantity of grease |
|
/LT |
Bearing with the grease for lower temperature, the additional
letter is the same meaning as /HT |
|
/MT |
Bearing with the grease for medium temperature, the
additional letter is the same meaning as /HT |
|
/LHT |
Bearing with the grease for lower or higher temperature, the
additional letter is the same meaning as /HT |
|
/Y |
Combinations of the letter Y with another letter or figure
can identify differences from the standard design which are
not concluded by other established suffixes |
| |
/YA Modification of structures (comprehensive expression) |
| |
/YA1 The outer surface of bearing outer ring differs from
that of standard design |
| |
/YA2 The outer surface of bearing outer ring differs from
that of standard design |
| |
/YA3 The outer surface of bearing outer ring differs from
that of standard design |
| |
/YA4 The outer surface of bearing outer ring differs from
that of standard design |
| |
/YA5 The outer surface of bearing outer ring differs from
that of standard design |
| |
/YA6 The outer surface of bearing outer ring differs from
that of standard design |
| |
/YA7 The outer surface of bearing outer ring differs from
that of standard design |
| |
/YA8 The outer surface of bearing outer ring differs from
that of standard design |
| |
/YA9 The outer surface of bearing outer ring differs from
that of standard design |
| |
/YA10 The outer surface of bearing outer ring differs from
that of standard design |
