HRB Bearing Catalogue.

Code name for HRB rolling bearing

Rolling bearing code is a kind of engineering language, which is used to describe the bearing type, dimension, tolerance grade, internal structure change, clearance change, and necessary characteristic parameters.

The Code of HRB rolling bearings is applicable to the code of general-purpose rolling bearings whose external dimensions conform to GB/T273.1(ISO355), GB/T273.2(ISO104), GB/T273.3(ISO15) and GB/T273.3(ISO15).

The bearing code specified in the code of HRB rolling bearing consists of BASIC code and supplementary code. Its BASIC code includes bearing type, bearing structure, size series, and inside diameter size; Supplementary codes include ring variants, material variations, cage variations, seals and dust-proof devices, pairing combinations, clearance groups, tolerance classes, special performance requirements, and bearing codes for external companies. Supplementary codes are indicated in the form of prefixes and postfix to the left and right of the basic bearing codes.

BASIC code for HRB bearings

The basic code of HRB bearing is composed of bearing type code, Dimension series code and bore diameter code. The basic code for each standard bearing is usually three to six digits or a combination of letters and numbers. The digits are usually arranged from left to right.

1) type code

Table 1 bearing type code

Bearing type code, bearing type name

0 double-row angular contact ball bearing

1 self-aligning ball bearing

2 self-aligning roller bearings and thrust self-aligning roller bearings

3 tapered roller bearings

4 double-row deep groove ball bearings

5 thrust ball bearings

6 deep groove ball bearings

7 angular contact ball bearings

8 thrust cylindrical roller bearings

N cylindrical roller bearing

N basic type cylindrical roller bearings with the outer ring without rib

Cylindrical roller bearings with NU inner race without rib

NJ cylindrical roller bearing with single rib in the inner ring

NF cylindrical roller bearings with single rib outer ring

Nup cylindrical roller bearings with single rib and flat rib

NCF cylindrical roller bearings without a cage with single flange and spring lock ring

NJG cylindrical roller bearings without a cage with single rib in the inner ring

2) double-row or multi-row cylindrical roller bearings are denoted by NN, followed by 1-2 letters to indicate the bearing structure:

NN basic type double row cylindrical roller bearing without rib

Double Row cylindrical roller bearings with NNU inner ring without rib

The NNC Outer Ring has a single rib with a flat rib and an oil well

Double Row cylindrical roller bearings without cage

The NNCF Outer Ring has a single rib with a spring lock ring and an oil hole oil groove

Double Row cylindrical roller bearings without cage

Non-cage double with double spring lock ring and oil groove on NNCL outer ring

Row cylindrical roller bearing

3) needle roller bearings are NA or NK:

Needle roller bearings with cage without rib and inner ring

QJ double half inner ring four-point contact ball bearing

234 bidirectional thrust angular contact ball bearings

T-tapered roller bearings, size series ISO355 series

Column Code

Additional code for HRB bearings

Prefix

Code for the relationship between parts and parts of a complete set of bearings

AR ball and cage assembly

Rollers and cages for k radial or thrust cylindrical roller bearings

Modular unit

Separate inner ring or outer ring of separate-type bearings

Inner Ring of Ir radial bearing

The outer ring of OR radial bearing

Shaft ring of IW thrust bearing

Ow thrust bearing housing

Bearing rings for WS thrust cylindrical roller bearings

Seat ring for Gs thrust cylindrical roller bearings

R-type bearings with rolling element and cage assembly

Inner or outer ring

Postcode

(a) code for internal structural changes

A (1) represents an improved design of the interior of the bearing

B (2) denotes a design, the meaning of which varies according to type or series. These post-codenames are usually used during the bearing improvement transition period

C is canceled upon completion but sometimes retained permanently. To represent a variation of the interior design

D for example:

E angular contact ball bearing

A — contact angle 30 °

AC — contact angle 25 °

B — contact angle 40 °

C — the angle of contact 15 °

(b) the code name for external structural change

DH has two seats on the one-way thrust bearing

One-way thrust bearing with inner diameter less than the standard value of DP seating

DS one-way thrust bearing with two shaft rings

G universal (arbitrary) matched single-row deep groove ball bearings and

Single Row angular contact ball bearings. Back-to-back,

face, face or in series, G followed by the letter (A,

B、C）

represents the preload at installation as a pair.

A-light preload;

B — preload greater than a;

C — preload greater than B.

The outer dimensions of the X bearing have been changed in one or more places to match the

ISO standards are identical. This code is only in transition

Interim use.

– RZ one-side sealed ring bearing (non-contact). Sealing ring

When the structure is changed, it is denoted by an additional number after RZ.

– 2rz bearings with sealed rings on both sides (non-contact type). Sealing ring

When the structure is changed, it is denoted by an additional number after 2RZ.

– Rs 1 bearing with one side sealed ring (contact type). Seal ring structure

Change is indicated by an additional number after RS1.

– 2rs1 bearings with seal rings on both sides (contact type). Seal ring structure

Change is indicated by an additional number after 2RS1.

– z bearing with the dust cover on one side

– 2Z bearings with the dust cover on both sides

K tapered bore bearing of 1:12 taper

K30 tapered bore bearing of 1:30 taper

Bearing with a stop on R Outer Ring

N bearing outer ring with stop groove

NR bearing outer ring with stop groove and stop ring

– bearings with stop groove on RZN outer ring-RZ + N

– bearing with stop groove on the outer ring and dust cover on one side-z + N

The outer ring of the RZNR has a stop groove and a stop ring on one side with a seal ring

Bearings.-RZ + NR

– one side of ZNR outer ring with retaining ring with dust cover-z + NR

– bearings with stop groove on the outer ring, RZNB,-RZ + N,

the sealing ring and the stop groove are on the same side

– ZNB bearing with stop groove and dust cover on one side,-z + N,

the dust cover is on the same side as the stop groove

– The ZNBR Outer Ring has a stop groove and a dust cover on one side of the stop ring,

– Z + NR, its dust cover and stop slot on the same side

– RZNBR shaft with seal ring on one side of the outer ring with stop groove and stop ring

Bearing,-RZ + NR, with seal ring on the same side as stop groove

– 2rzn bearing with stop groove on the outer ring and sealed ring on both Sides,-2rz + N

– 2ZN Outer Ring with stop groove on both sides with dust cover Bearing,-2z + N

– 2R ZNR Outer Ring with stop groove and stop ring on both sides with seal ring shaft

Admit It.-2rz + NR

– 2znr Outer Ring with stop groove and stop ring on both sides with dust cover shaft

Yes, Sir.-2z + NR

– RZZ bearings with a sealing ring on one side and a dust cover on the other,

-RZ+Z

– RZZNone side with a seal ring on the other side with a dust cover of the outer ring

Grooved bearing whose seal ring is located on the opposite side of the stop groove,

-RZ+Z+N

– RZZNR with seal ring on one side and dustproof cover on the other

The movable groove and the retaining ring bearing whose seal ring is located in the retaining groove

Opposite side,-rz + z + NR

– RZZNB one side with a seal ring on the other side with a dust cover of the outer ring

A movable groove bearing whose seal ring is located on the same side as the stopping groove

– RZZNBR one side with a seal ring on the other side with a dust cover of the outer ring

The movable groove and the retaining ring bearing whose seal ring is located in the retaining groove

Same side

The outer ring edge of the N1 bearing has a locating groove (used for bearings

Normal orientation)

The edge of the outer ring of the N2 bearing is provided with two radially symmetric locating slots (using

The normal orientation of bearing

N 4N + N 2, positioning slot and stop slot are opposite on both sides

N 6N + N 2, positioning slot and stop slot on the same side

– ic lock angular contact ball bearing on the inner ring

(c) code for change of material and construction of the cage

Pressing cage with H-hardened steel plate

J stamping cage of unhardened steel plate. When the structure and the material grade have changed, use the additional number to distinguish

Pressing cages of JA unhardened steel plate-guide for centering of the outer ring

Je non-hardened steel plate pressed cage, phosphate treatment

Y brass stamping cage. When the structure and the material grade have changed, use the additional number to distinguish

Ya brass plate stamping cage, outer ring centering guide

Cage, turning, of f steel or ductile iron. When the structure and the material grade have changed, use the additional number to distinguish

Turning Cage of FA steel or ductile iron. Outer ring centering guide

Turning Cage of FB Steel or ductile iron. Inner ring centering guide

Steel car cage with Fe treated by phosphating

Turning Cage, inner or outer, of steel or nodular cast iron, in the form of a flanged or hinged hole (in the form of a window)

L light alloy car cage. When the structure and the material grade have changed, use the additional number to distinguish

Cage, car, of La light alloy; a guide for centering of Outer Ring

Cage, turning, of LB light alloy; a guide for centering of inner ring

Light alloy lathe cage with hole drawing or reaming (hole shape is window). Outer ring centering guide

The LPS LP cage has a lubricant groove on the guide surface

M brass car cage. When the structure and the material grade have changed, use the additional number to distinguish

Brass car cage guided by Ma outer ring centering

Brass car cage guided by MB inner ring centering

The Mas Outer Ring centering guide is made of brass, and the guide surface is provided with a lubricating oil groove

MBS internal ring centering guide brass car cage, guide surface with lubricating oil groove

Brass turning Cage of MP, drawn or reamed (window-shaped), with inner or outer ring centering guide

MPS cage with grease grooves on boot face

Q Bronze Car Cage. When the structure and the material grade have the changed, use the additional number to distinguish

Bronze car cage guided by QA outer ring centering

Bronze car cage guided by QB inner ring centering

Bronze Car-type cage guided by the QAS outer ring centering, with lubricating oil grooves on the guide surface

The QBS inner ring centering guide is made of bronze, and the guide surface is provided with a lubricating oil groove

Bronze turning cage of QP or reaming (window-shaped), guided by centering inner or outer rings

QPS QP cage with lubricating oil groove on a guide surface

T-fiber reinforced Phenol formaldehyde resin cage

Phenol formaldehyde resin cage guided by TA outer ring centering

TB, inner ring, guided, fiber-reinforced Phenol formaldehyde resin

TN reinforced Nylon 66 die injection cage

Reinforced Nylon 66 die-cast cage guided by TNA Outer Ring centering

TNB inner ring centering guided die-casting cage of reinforced nylon 66

TNAS TNA Cage with lubricant groove on a guide surface

The Cage of TNBS TNB has a lubricant groove on the guide surface

V bearings without cage full of rolling elements

The D2 cage is soft nitrided

(d) code for material and maximum operating temperature changes

/HE chromium-bearing steel produced by the ESR process

/HA is made of vacuum degassed chromium-bearing steel (this code is not required if all vacuum-degassed steel is used)

/Hu bearings are made of non-hardenable stainless steel (e.g:

1CR18NI9TI). When the material grade changes, use the attached figures

To tell the difference

The bearings are made of hardenable stainless steel (e. g. 9CR18MO).

When the material grade changes, use the attached figures to distinguish

HH bearings are made of high-temperature bearing steel (E. G. CR4MO4V). When the material grade changes, use the attached figures to distinguish

After high-temperature tempering treatment, the maximum working temperature of the bearing parts can reach 150 °C

After high-temperature tempering treatment, the highest working temperature can reach 200 °C

After high-temperature tempering treatment, the highest working temperature can reach 250 °C

After high-temperature tempering treatment, the maximum working temperature of the bearing parts can reach 300 °C

/s 4 bearing parts after high temperature tempering treatment, the highest working temperature can reach 350 °C

(E) change of code for Tolerance class

The dimensional accuracy and rotary accuracy of the/p 6 bearing are of grade P 6. Equivalent to ISO standard level 6

The dimension accuracy and rotation accuracy of the/p 5 bearing are of grade P 5. Equivalent to ISO level 5

The dimension precision and rotation precision of the bearing are P 4. Equivalent to ISO Standard Level 4

The dimensional accuracy and rotary accuracy of/P4a bearings are P4a class. The dimensional accuracy is equivalent to P 4, and the rotational accuracy is equivalent to AFBMA9

The dimension accuracy and rotation accuracy of the bearing is of the order of p 2. Equivalent to ISO Standard Level 2

/P6X tapered roller bearing dimensional accuracy and rotation accuracy P6X class. Equivalent to ISO standard level 6x

The dimensional accuracy and rotary accuracy of the/PA9 bearings are in accordance with AFBMA9 class

The dimension precision and rotation precision of/SP bearings are in accordance with SP level standard

The dimensional accuracy and rotary accuracy of the/UP bearings meet the standard of UP class

The dimensional tolerances and rotation accuracy of/CL4 tapered roller bearings are in accordance with level 2 of the technical conditions for inch-type tapered roller bearings

The dimensional tolerances and rotation accuracy of/CL3 tapered roller bearings are in accordance with level 3 of the technical conditions for inch-type tapered roller bearings

The dimensional tolerances and rotation accuracy of/CL0 tapered roller bearings are in accordance with class 0 of the technical conditions for inch-type tapered roller bearings

The dimensional tolerances and rotation accuracy of/CL00 tapered roller bearings are in accordance with class 00 of the technical conditions for inch-type tapered roller bearings

(F) clearance change of code

The clearance of the/c 1 bearing is in accordance with Group C 1

The clearance of the 2 bearings is in accordance with Group C 2

C 3 bearing

HRB Bearing China

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