SKF company makes up the code

Source: China Bearing Network Time: 2018-02-18

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SKF's rolling bearing; the intact code of the rolling bearing components and accessories consists of the root code and the make-up code. The root code is composed of the bearing type code; the scale series code and the inner diameter code. It indicates the basic type of the bearing; the layout and scale; the bearing code The base of the make-up code is the shape of the bearing layout; the scale; public service; the code number added to the left and right code when the skill requirement is changed. The code added to the left of the root code is the pre-code; to identify the bearing component; The added code is the post code; it is used to indicate the drawing problem that is different from the original drawing or different from the current production specifications.
1) Preamble code
GS thrust cylindrical roller; thrust needle roller bearing race. Example: GS81107 - thrust cylindrical roller bearing 81107 seat.
K thrust roller and the holder of the bracket. Example: K81170.
K- Fit AFBMA specification series Inch tapered roller bearings with inner ring (inner cone) or outer ring (cone ring) with roller and holder assembly. Example: K-09067 series is the inner cone of 09000 tapered roller bearing body.
L Single bearing inner ring or outer ring. Example: LNU207 cylindrical roller bearing NU207 inner ring.
L30207 tapered roller bearing 30207 outer ring.
R Remove the single inner ring or outer ring of the separate bearing. Example: RNU207 cylindrical roller bearing NU207 with roller and the outer ring of the bracket assembly. R30207 tapered roller bearing and the inner ring of the bracket assembly.
WS thrust cylindrical roller; thrust needle roller collar. Example: WS81107 thrust cylindrical roller bearing 81107 shaft ring.
2. If the post code has several post-codes in the bearing code; these post-codes are grouped in the following order: (1) internal depiction; (2) external depiction; (3) adherence; (4) other features. 1) (2) There is a half Chinese character between the post code and the root code in the group (3), and the rear code of the dust cover and the seal ring in the (2) group is an exception; A hyphen "-" is placed in front of it, and the trailing code in the group (4) is preceded by a slash. The slash is also used to block the two (4) group post-codes in the following two cases:
a. The first post code ends with a number and the second post code with a number initially. Example: 6205/P53/223316.
B. A post-code indicating the size of the deflation and/or movement range followed by a post-code indicating the smooth grease type; if the slash is omitted, it will cause a mixture. For example, 6205-2Z/C2L/HT42 (=C2L +HT42).
(1) Internal depiction
A; B; C; D; E When the normal internal layout changes; these post-codes and their combinations generally form part of the bearing series code; they are generally only used during the transition period; When they indicate an alternative layout; these post-codes become permanent. Generally their meaning is specific to a bearing type or bearing series. For example:
Single row angular touch ball bearing
The ACD touch angle is 25 degrees.
B The touch angle is 40 degrees.
The CC touch angle is 12 degrees.
The CD touch angle is 15 degrees.
BE BE bearing with a touch angle of 40 degrees; the steel ball is enlarged; the glass fiber reinforced nylon 6.6 is adhered to the frame.
Double row angular touch ball bearing
A specification of bearing with outer diameter less than or equal to 90 mm; no ball gap; glass fiber reinforced nylon 6. 6 holding frame.
E bearing has a ball-filling port on one side; it can hold more steel balls; therefore, it has high radial and axial bearing capacity.
Spherical roller bearing
CAC; ECAC; CA; ECA These are used for large-scale bearings; the rollers are symmetrical. The inner ring has fixed ribs on both sides; the active retaining ring is guided by the inner ring. The support frame is all brass or steel solid frame. CAC and ECAC bearing rollers and raceways are optimized for machining; they help roller guidance; and reduce conflicts. ECAC models with reinforced rollers;
CC; C; EC These types of bearing rollers are symmetrical; the inner ring has no ribs. Each row of rollers has a stamped steel plate to hold the frame. The retaining ring in the activity is guided by the inner ring. The EC type bearing is made of a reinforcing roller; Improved load capacity. CC type bearing roller and raceway appearance are optimized for machining; it helps roller guidance; and can reduce conflicts.
E is SKF's selection of the latest specifications; bearing roller symmetry; inner ring without ribs; Wu bronze production activities in the ring close to the outer ring; guided by the support frame; each row of rollers has a stamped steel plate holder. E-type bearings With all the advantages of CC type bearing; the latest support frame can be put into more extended diameter rollers; the bearing load can be higher. The E-bearing outer ring has oil groove and three oil holes; W should be added to the code name to show the difference.
Cylindrical Roller Bearings
B bearings use externally treated rollers (full complement roller bearings).
B4 bearing ring outer surface and roller appearance are treated (full complement roller bearing).
The internal shape of the EC bearing has been improved; the bearing capacity is high; the rib and roller end face have excellent touch and smooth conditions; and can accept high axial load.
(2) External depiction
CA; CB; CC universal matching single row angular touch ball bearing; optional (series; face to face or back to back) pairing device. When back to back or face to face; axial device front internal clearance to normal value ratio: .CA); normal ( CB); larger (CC).
-2F Spherical ball bearings with dust ring on both sides.
-2FF outer spherical ball bearing with combined dust ring on both sides.
G Universal pairing single row angular contact ball bearings. When placed face to face or back to back; there is a certain preload of the device in the bearing.
GA face to face; when placed back to back; there is a lighter preload in the bearing.
GB face to face; when placed back to back; medium preload in the bearing.
GC face to face; when placed back to back; heavy preload in the bearing.
K tapered hole; taper 1:12.
K30 tapered hole; taper 1:30.
-LS bearing has a touch seal on one side; there is no seal groove on the inner ring.
-2LS bearing has LS seal on both sides.
N bearing outer ring has a stop groove.
The NR bearing has a retaining groove on the outer ring and a snap ring.
There are two diametrically opposite notches on the N2 outer ring chamfer.
PP bearing (support roller bearing; cam follower bearing) has a touch seal on both sides.
The RS bearing (needle bearing) has a synthetic rubber or polyurethane touch seal on one side.
-RS1 bearing has a lining steel synthetic rubber touch seal on one side.
-2RS1 bearing has RS1 seal on both sides.
-2RS bearing (needle bearing) has RS seal on both sides.
-RZ bearing has a low-conflict seal on one side of the steel-lined synthetic rubber.
-2RZ bearing has RZ seal on both sides.
X 1. The fundamental scale has been revised to fit the ISO specification, 2. Cylindrical rolling surface (support roller bearing; cam follower bearing).
Z bearing has a dust cover on one side (non-conflicting seal).
-2Z bearing has a dust cover on both sides.
-ZN bearing has a dust cover on one side; there is a stop groove on the outer ring on the other side.
-2ZN bearing has a dust cover on both sides; the outer ring has a stop groove.
-2NR with -ZN; and with a snap ring.
-2ZNR with -2ZN; with a snap ring.
(3) Persistence frame is used to indicate the guiding method of the bracket in the bearing; after the post code of the frame is attached, the letter A or BA may be added to indicate that the frame is guided by the outer ring, and B indicates that the frame is guided by the inner ring. The unsupported frame is not indicated. Guided by the roll body.
Example: MA brass mechanism adheres to the frame; outer ring guides.
You can also add numbers after the post-code is attached; indicate different depictions or materials.
For example, TN9 glass fiber reinforced nylon 6. 6 mold injection frame.
F steel or unique cast iron body adheres to the frame.
J steel plate stamping forming frame.
M light alloy solids adhere to the frame.
MP brass solids adhere to the frame.
P glass fiber nylon 6. 6 mold injection frame.
TN engineering plastic mold sticking frame.
Y copper plate stamping forming frame.
V full roller bearing (no support).
VH Full-roller bearing (cylindrical roller bearing) consisting of non-displacement roller assemblies.
(3) Other characteristics
1) Public service level
/CLN is equivalent to ISO public service grade 6X; used for metric tapered roller bearings (width reduction is common).
/CL0 is equivalent to ISO0 level public service; used for inch tapered roller bearings.
/CL3 is equivalent to ISO3 level public service; used for inch tapered roller bearings.
/CL7A tapered roller bearings that meet the specifications of the differential bearing.
/CL7C fits the differential bearing with a uniquely standardized tapered roller bearing.
/P4 scale and rotation accuracy meet ISO4 level public service (than P5 accuracy).
The /P4A scale accuracy is in line with ISO4 level public service; the rotation accuracy is equivalent to the AFBMA specification ABEC9.
/P5 scale rotation accuracy meets ISO5 level public service (accuracy is higher than P6).
The /PA9A scale and rotation accuracy are equivalent to the AFBMA specification ABEC9.
The /PA9B scale accuracy is equivalent to the AFBMA specification ABEC9; the rotation accuracy is higher than PA9A.
The /SP scale accuracy is about P5; the rotation accuracy is about P4.
/UP scale accuracy is about P4; rotation accuracy is higher than P4.
2) Bearing clearance
The /C1 clearance fits the set of rules; the play is less than 2 sets.
The /C2 clearance fits the two groups of the specification rules; the clearance is less than 0.
/C0 Clearance fits the 0 group of the specification rules; the code is omitted; not marked.
The /C3 clearance fits the three groups of the specification rules; the clearance is greater than zero.
The /C4 clearance fits the 4 groups of the specification rules; the clearance is greater than 3 groups.
/C5 The clearance fits the 5 groups of the specification rules; the clearance is greater than 4 groups.
When the clearance code is combined with the bearing official code P4; P5 or P6; the clearance code C can be omitted.
Example: P6+C2=P62
3) Unique skill needs.
/Q Best internal layout and appearance roughness (for tapered roller bearings).
The /Q66 oscillation level is less than the general specification; the oscillation peak is less than the general specification.
/QE5 fits the unique specification of the motor; the scale and rotation accuracy is up to P6. Very low noise.
/QE6 fits the specification of the motor; low noise.
4) Bearing equipment.
/DB Two pairs of single row deep groove ball bearings; single row angular contact ball bearings or single row tapered roller bearings are paired back-to-back. The numbers after the DB indicate the axial clearance or the preload of the device.
A light preload (angular touch ball bearing).
B Preload is larger than A (angular touch ball bearing).
C preload is larger than B (angular touch ball bearing).
The internal clearance of CA is more than that of the wall.
CB internal clearance is larger than CA (deep groove or angular touch ball bearing).
CC internal clearance is larger than CB (deep groove ball bearing).
CG "zero" clearance (tapered roller bearings).
C... The number behind the unique axial internal clearance CC indicates the axial clearance.
GA lighter preload (deep groove ball bearing).
GB preload is greater than CA (deep groove ball bearing).
G... Unique preload (the number behind the G indicates the preload is large..
Example: 6208/DBGA marked with two back-to-back devices with a light load 6208 deep groove ball bearing.
/DF Two face-to-face paired single row deep groove ball bearings; single row angular contact ball bearings or single row tapered roller bearings. DF can be followed by the same letter after DB.
/DT Two pairs of deep groove ball bearings placed in series; single row angular contact ball bearings or single row tapered roller bearings.
5) Heat treatment. The inner and outer rings of the bearing are safely disposed of; they can be operated at the following temperatures:
/S0 is up to 150 degrees Celsius.
/S1 up to 200 degrees Celsius.
/S2 up to 250 degrees Celsius.
/S3 up to 300 degrees Celsius.
/S4 up to 350 degrees Celsius.
6) Make up for the smoothing agent.
/W can't make up for smooth oil (no smooth oil groove and oil hole).
/W20 bearing outer ring has three smooth oil holes.
/W33 bearing outer ring has smooth oil groove and three oil holes.
/W33X bearing outer ring has smooth oil groove and six oil holes.
7) Smoothing agent. The post code used to identify the type of smooth grease filled in the bearing consists of a letter group and two numbers; the letter indicates the temperature scale; the next two numbers indicate the actual smooth grease used; the common letter groups are as follows:
/HT high temperature grease (-20 degrees Celsius ~ +130 degrees Celsius).
/LHT Low/High Temperature Grease (-40 degrees Celsius ~ +140 degrees Celsius).
/LT low temperature grease (-50 degrees Celsius ~ +80 degrees Celsius).
/MT medium temperature grease (-30 degrees Celsius ~ 110 degrees Celsius).
The MT post code indicates that the specific bearing uses non-standard grease. The amount of smooth grease in the bearing is different from the normal filling amount (25%~30% of the free space inside the bearing); it is identified by an additional letter:
A: The amount of smooth grease is less than the standard dosage.
B: The amount of smooth grease is greater than the standard dosage.
C: The amount of smooth fat is greater than B.
Example: 6210-2Z/HT51B is marked with 6210 deep groove ball bearing with two dust caps; the amount of grease is more than the standard filling amount expressed by his post code; it can be used for high temperature.
8) Other characteristics. The letter V and another letter (such as VA) are combined with three numbers; used to identify variants that cannot be represented by existing other post-codes. For example:
/VA201 kiln car bearing.
/VA301 Cylindrical roller bearings for traction motors.

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