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The FAG bearing the code from the basic code, pre-code and code. The basic code represents the bearing type, structure and size. The Prefix said bearing parts are placed in the basic code before. Post code, said bearing structure of shapes, sizes, seal, maintain the frame, tolerances, clearance, heat treatment, packaging, technical requirements change, bearing the basic code to add supplementary code.
1 pre-Code
The pre-Code R is placed directly on the bearing basic code before the rest of pre-code and basic code separated with a small dot.
GS-thrust cylindrical roller bearing ring. Cases: GS.81112
K - the rolling element and cage assembly. Cases :: thrust cylindrical roller and cage assemblies K.81108.
R - without separable inner or outer ring of the bearing. Cases: RNU207-without inner ring NU207 bearings.
WS-thrust cylindrical roller bearing shaft washer. Example: WS.81112.
2 set code
Code placed in the rear behind the basic code with multiple groups, set the code, set code sequence shall be listed in the bearing code table are arranged from left to right. Some postposition code separated by a small dot with the underlying code.
(1) the internal structure of
A, B, C, D, E internal structural changes
Example 1: angular contact ball bearings 7205C, 7205E, 7205B, C-15 ° contact angle, E-25 contact angle, the B-40 degree contact angle.
Example 2: cylindrical roller, spherical roller thrust-aligning roller bearings N309E, 21309E, 29412E enhanced design of the bearing load capacity.
VH-roller self-locking, full roller cylindrical roller bearings (roller diameter of the umbra is different from the same type of standard bearings). Cases: NJ2312VH
(2) Bearing Dimensions and external structure
DA-band pairs of semi-inner detachable double row angular contact ball bearings. Cases: 3306DA
DZ-cylindrical outer diameter of the wheel bearings. In: ST017DZ
K-tapered bore bearings, taper 1:12 Example: 2308K.
K30-tapered bore bearings, taper 1:30. Example: 24040K30.
2LS-double inner ring, with a dust cover on both sides of the double row cylindrical roller bearings. Cases of:-internal structure of the Change in NNF5026C.2LS.V, double inner ring, on both sides with a dust cover, full roller double row cylindrical roller bearings.
N-band-stop on the outer ring groove bearing. Example: 6207N.
NR-outer with a stopper bearing groove and snap ring. Example: 6207NR.
N2-outer ring with a groove in two four-point contact ball bearings. Example: QJ315N2.
S-outer ring with lubrication groove and three lubrication holes in the bearing. Cases: 23040. The bearing outer diameter D greater than or equal to 320 mm self-aligning roller bearings are not marked S-.
X-Dimensions comply with the provisions of international standards. Example: 32036X.
Z. - the special structure of technical conditions. From the Z11 from the turn down order. Cases: Z15-stainless steel bearings (W-N01.3541).
ZZ-roller bearings with two guide the outer ring of the retaining ring.
(3) seal and dust
RSR-bearing side with the seals. Example: 6207RSR.
ZR-bearing side with dust cover. Example: 6207ZR.
2ZR-bearings with closures on both sides. Example: 62072ZR.
ZRN-bearing side with dust cover, with the other side of the outer groove. Example: 6207ZRN.
2ZRN-bearing on both sides with a dust cover, with a groove on the outer ring. Example: 62072ZRN.
(4) cage materials
1) solid cage.
A or B is placed in the cage class A cage outer ring guide, B, said cage from the inner guide.
F-steel solid cage, rolling element guide.
FA-steel solid cage, the outer guide.
FAS-steel solid cage, the outer ring guide, with a lubrication groove.
FB-steel solid cage, the inner guide.
FBS-steel solid cage, inner guidance, with a lubrication groove.
FH-steel entity cage, after carburizing and quenching.
H, H1-carburized cage.
FP-steel solid window-type cage.
FPA-steel solid window type cage, the outer guide.
FPB-steel solid window-type cage, the inner guide.
FV, FV1-steel solid fenestrae cage, aging, quenching and tempering treatment.
L-light metal solid cage, ball centered.
LA-light metal solid, the outer guide.
LAS-light metal solid, the outer ring guide, with a lubrication groove.
LB-light metal solid, the inner guide.
LBS-light metal solid, inner guidance, with a lubrication groove.
LP-light metal entity window type cage.
LPA-light metal entity window type cage, the outer guide.
LPB-light metal entity window type cage, the inner guide (thrust roller bearing axis guide).
M, M1-brass solid cage.
MA-brass solid cage, the outer guide.
MAS-brass solid cage, outer ring guide, with a lubrication groove.
MB-brass solid cage, the inner guide (thrust-aligning roller bearing axis circle guide).
MBS-brass solid cage, inner guidance, with a lubrication groove.
MP-brass solid straight Pockets cage.
MPA-brass solid straight the Pockets cage, the outer guide.
Of MPB-brass solid straight Pockets cage, the inner guide.
T-phenolic laminate piping solid cage, ball.
TA-phenolic cloth laminated tube solid cage, the outer guide.
TB-phenolic cloth laminated tube solid cage, the inner guide.
THB-phenolic cloth laminated tube pocket pass the cage, the inner guide.
TP-phenolic cloth laminated tube straight Pockets cage.
TPA-phenolic laminate piping straight Pockets cage, outer boot.
TPB-phenolic cloth laminated tube straight Pockets cage, the inner guide.
TN-engineering plastic mold injection cage, rolling element guide, with figures of different materials.
TNH-engineering plastic self-locking pocket pass cage.
TV-glass fiber reinforced polyamide solid cage, ball guide.
TVH-glass fiber reinforced polyamide self-locking pocket hole entity cage, ball guide.
TVP-glass fiber reinforced polyamide Window solid cage, ball guide.
TVP2-glass fiber reinforced polyamide solid cage, roller guide.
TVPB-glass fiber reinforced polyamide solid cage, the inner guide (thrust roller bearing axis guide).
TVPB1-glass fiber reinforced polyamide solid window-type cage axis guide (roller thrust bearings).
2) cages
J-steel cages.
JN-deep groove ball bearings riveted cage.
3) cage changes.
Plus cage code, or inserted in the cage code the middle of the figure, indicating that maintain the structure after changes. These figures are used only for the transitional period, for example: NU1008M1.
(5) non-cage bearings
V-filled rolling element bearings. Example: NU207V.
VT-with isolation ball or roller filled rolling element bearings. Example: 51120VT.
(6) tolerance level (including dimensional accuracy and rotation accuracy)
P0-tolerance class in accordance to international standards ISO 0, code omitted, does not mean that.
P6-tolerance class in accordance with international standards ISO 6.
P6X-tolerance class in accordance with international standards ISO of 6X tapered roller bearings.
P5-tolerance class in accordance with international standards ISO 5.
P4-tolerance class in accordance with international standards ISO 4.
P2-tolerance class in accordance with International Standard ISO 2 (excluding tapered roller bearings).
SP-dimensional accuracy equivalent to 5 rotation accuracy is equivalent to four (double row cylindrical roller bearings).
UP-dimensional accuracy equivalent to 4, the rotation accuracy is higher than 4 (double row cylindrical roller bearings).
HG-dimensional accuracy equivalent to 4, the rotation accuracy is higher than 4, less than two (spindle bearings).
(7) clearance
C1-clearance of a set of standard provisions, less than 2 groups.
C2-clearance in line with the standard requirements of the two groups, less than 0 group.
C0-clearance in line with the standard requirements of the code omitted, does not mean that.
C3-clearance in line with the standard requirements of the three groups is greater than 0 group.
C4-clearance in line with the standard requirements of the four groups, more than three groups.
C5-clearance meet the standard requirements, greater than 4.
1) Tolerance class code and the clearance letter is required, said, take the combination of Tolerance class code (P0 level does not mean that) plus the clearance group (group 0 does not mean that).
Example: P63 = P6 + C3, said bearing tolerance class P6 class, radial clearance of the three groups.
2) non-standard clearance, special radial clearance and axial clearance requirements, the limits should the letter R (radial clearance) or A (axial clearance) after the use of micron use parts separated by dots between the numbers.
Cases: 6210.R10.20-6210 bearing, radial clearance of 10 microns to 20 microns.
(8) bearing test noise
F3-low-noise bearings. Mainly refers to the deep groove ball bearings cylindrical roller bearings and inner diameter d is greater than 60 mm or more. Example: 6213.F3.
G-low-noise bearings. Mainly refers to the diameter d is less than or equal to 60 mm deep groove ball bearings. Example: 6207.G.
(9) heat treatment
S0-bearing rings after high temperature tempering, the working temperature up to 150 degrees Celsius.
S1-bearing rings after high temperature tempering, the working temperature up to 200 degrees Celsius.
S2-bearing rings after high temperature tempering, the working temperature up to 250 degrees Celsius.
S3-bearing rings after high temperature tempering, the working temperature of up to 300 degrees Celsius.
S4-bearing rings after high temperature tempering, the working temperature up to 350 degrees Celsius.
(10) special technical conditions
F. The - numbered consecutively manufacturing conditions. Example: F80-bearing, compression of the outside diameter tolerances and radial clearance.
K. The - numbered consecutively check the technical conditions. Cases: K5-bearing, the diameter tolerance compression.
ZB-diameter greater than 80 mm or more with protruding cylindrical roller. Example: NU364.ZB.
. ZB2-needle at both ends of the convexity is greater than the general technical requirements. Example: K18 and * 26 * 20F.ZB2.
ZW-double row needle roller and cage assemblies. Example: K20 * 25 * 40FZW.
.700 ... 700 000 at the beginning of the consecutive number of technical conditions.
The Z52JN.790144-bearings can be used for high temperature and low speed, a special heat treatment, steel stamping, riveting cage, large clearance by the phosphate treatment, injection oil, using the temperature over 270 degrees Celsius.
Can be used for high temperature and low speed Z52JN.790191-bearing, special heat treatment, steel stamping, riveting cage, large clearance by the phosphate treatment injection oil, using temperatures up to 270 Celsius.
(11) pairs of bearings
1) K conditions paired bearings, the following special conditions related to the pairs of bearings:
K1-two deep groove ball bearings installed in pairs to accommodate axial loads.
K2-two deep groove ball bearings mounted in pairs in order to withstand the bidirectional axial load.
K3-two deep groove ball bearings without clearance back to back installation (O-type installation).
K4-two sets of deep groove ball bearings installed under the no-clearance face to face (X-type installation).
K6-two sets of angular contact ball bearings installed in pairs to accommodate axial load.
K7-two sets of angular contact ball bearings without clearance back to back installation (O-type installation).
K8-two sets of angular contact ball bearings installed under the no-clearance face to face (X-type installation).
K9-inner and outer rings with a spacer between the two sets of tapered roller bearings installed in pairs to accommodate axial load.
K10-inner and outer rings with a spacer between the two sets of tapered roller bearings without clearance back to back installation (O-type installation).
K11-cup with a spacer between the two sets of tapered roller bearings without clearance face to face to install the installation of (X -).
In pairs or groups configured bearings, packaging word with delivery, or otherwise indicated are one pair. Different sets of bearings are not interchangeable. Belong to the same set of bearings is installed, the installation should be carried out in accordance with the marking and positioning. If all pairs of bearings according to the configuration of a certain axial or radial clearance volume, the clearance should be connected to the K technical conditions marked by (7) a 2). For example, 31314A.K11.A100.140 said two sets of single row tapered roller bearing 31314A, face-to-face installation, with a certain distance between the outer ring, bearing assembly, the axial clearance between 100 microns to 140 microns, the assembly clearance zero.
2) Universal mating type bearings can be arbitrary (in series, face to face or back to back) matching installation, post-code for the UA and UO and UL.
UA small axial clearance in the bearing face to face or back to back installation.
. UO-bearing face to face or back to back installation without clearance.
UL-mild pre-interference in the bearing face to face or back to back installation. For example, B7004.TPA.P4.K5.UL angular contact ball bearings Spindle contact angle of 15 degrees, phenolic cloth laminated tube straight Pockets solid cage, the outer guide bearing tolerance class 4, the inner and outer diameter tolerance of narrow, Universal structure of the bearings installed in pairs back to back or face-to-face when installing a mild pre-interference.
(12) Lubrication
L. - grease. Cases: L64 = Arcanol brand Kea saponification of fat.
L9 .. - lubricants.
(13) Packaging
KS-sheet metal container packaging.
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| 23228CKE4 NSK | 140 | 250 | 88 |
| 22228CDKE4 NSK | 140 | 250 | 68 |