SKF

1) internal design

ACD - contact angle of 25 degrees.

B - contact angle of 40 degrees.

CC - contact angle of 12 degrees.

CD - contact angle of 15 degrees.

BE - contact angle of 40 degree BE type bearing, steel ball to increase, with glass fiber reinforced nylon 6.6 cage.

Double row angular contact ball bearing

A - the standard design of the diameter less than or equal to 90 mm bearing, no ball gap, using glass fiber reinforced nylon 6.6 cage.

E - bearing side of the bearing, can be loaded with more steel ball, so with a higher radial and axial carrying capacity.

Spherical roller bearing

CAC, ECAC, CA, ECA - these are designed for large sized bearings, and rollers are symmetrical..

CC, C, EC - this kind of bearing roller is symmetrical, the inner ring is no block..

E - SKF is the latest standard design. E type bearing outer ring with oil groove and three oil hole, then the rear code must be W, to show the difference.

Cylindrical roller bearing

B - the roller (full loaded roller bearing) with the surface of the treated roller..

B4 -- bearing surface and the surface of the roller are processed (roller bearing).

EC - the internal geometry of the bearing is improved, and has a high bearing capacity, and has good contact and lubrication condition, and can bear higher axial load..

(2) external design

Ca, CB, CC, the universal pairing type, single row angular contact ball bearings can be arbitrary (in series, face to face or back to back) paired installed. Back-to-back or face-to-face arranged axial installation of internal clearance and normal value ratio: small (CA), normal (CB), large (CC).

-2F -- spherical ball bearings on both sides with rejection dust circlip.

-2FF -- ball bearings on both sides with a combination of rejection dust circlip.

G - common single row angular contact ball bearing. Face to face or back to back arrangement, the bearing pre load with certain before installation.

GA -- face to face, back to back arrangement, the bearing pre load with lighter.

GB -- face to face, back to back arrangement, the bearing pre load moderate.

GC -- face to face, back to back arrangement, the bearing pre load with the heavier.

K - cone, taper 1:12.

K30 - cone, taper 1:30.

-LS - bearing side having contact seal, inner ring without seal groove.

-2LS - bearing both sides of the LS seal.

N - the bearing ring of the bearing has a stop groove.

NR - the bearing ring of the bearing has a stop groove and a stop ring.

The relative N2 notch chamfer two -- outer diameter direction.

PP - bearing (bearing roller bearing, cam follower) with contact seal.

RS -- (bearing needle bearing) side with synthetic rubber or polyurethane contact seal.

-RS1 - the bearing side has the lining plate synthetic rubber contact seal.

-2RS1 - bearing both sides of the RS1 seal.

-2RS -- (bearing needle bearing) with two RS seal.

-RZ - bearing side with a low friction seal of synthetic rubber with liner.

-2RZ - bearing both sides of the RZ seal.

X - 1 Basic dimensions are amended to conform to the ISO standard; 2 column shaped rolling surfaces (bearing roller bearings, cam follower).

Z - bearing side with dust cover (non friction seal).

-2Z - bearing both sides with dust cover.

-ZN - the bearing side has a dust cover, and the other side of the outer ring has a stop groove.

-2ZN - bearing both sides with dust cover, outer ring has stop groove.

-2NR - same -ZN, and with a stop ring.

-2ZNR - same -2ZN, and with a stop ring.

(3) holder

In order to show the boot mode of the bearing, the post code of the holder can be added with the letter A or B. A indicates that the cage is guided by the outer ring, and the B indicates that the cage is guided by the inner ring. The non - expressed cage is guided by the rolling element.

F - solid cage for steel or special cast iron.

J - forming holder for sheet metal forming.

M - solid cage for light alloy.

MP - solid brass cage.

P - Nylon 6.6 - mode injection holder for fiberglass.

TN - engineering plastic mold injection holder.

Y - forming holder for sheet metal forming.

V - Full Roller Bearing (no cage).

VH - the full roller bearing (cylindrical roller bearing) composed of non separable roller assemblies.

(3) other characteristics

1) tolerance level

/CLN - equivalent to the ISO tolerance grade 6X, for Metric tapered roller bearings (the tolerance of the width is reduced).

/CL0 -- equivalent to ISO0 tolerances, for taper roller bearing.

/CL3 -- equivalent to ISO3 tolerances, for taper roller bearing.

/CL7A - tapered roller bearing with standard differential bearing.

/CL7C - tapered roller bearing with special standard for differential bearing.

/P4 - Dimensions and rotation accuracy are in line with the ISO4 tolerance (P5 accuracy).

/P4A - dimensional accuracy is in line with the ISO4 tolerance, the rotation accuracy is equivalent to the ABEC9 level of the AFBMA standard.

/P5 - the dimension rotation accuracy is in line with the tolerance of ISO5 (higher than P6)..

/PA9A - the dimension and rotation accuracy are equivalent to the AFBMA standard of ABEC9.

/PA9B - the dimension accuracy is equivalent to the AFBMA standard of ABEC9, and the rotation accuracy is higher than PA9A.

/SP - the size accuracy of about P5, the rotation accuracy of about P4.

/UP - the size accuracy of about P4, the rotation accuracy is higher than P4.

2) bearing clearance

/C1 -- clearance with the 1 standard group, clearance less than 2 group.

/C2 -- clearance with the 2 standard group, clearance less than 0 group.

/C0 -- clearance with the 0 standard group, code omitted, not said.

/C3 -- clearance with the 3 standard group, more than 0 clearance group.

/C4 -- clearance with the 4 standard group, more than 3 clearance group.

/C5 -- clearance