ANGULAR CONTACT BALL BEARING

Angular Contact Ball Bearings

The raceways of the inner and outer rings of Angular Contact Ball Bearing can have relative displacement in the direction of the horizontal axis, that can withstand combined loads — that is, radial and axial loads acting simultaneously. The axial-load carrying capacity of Angular Contact Ball B earing increases as the contact angle increases. The contact angle is defined as the angle between the line between the contact point of the steel ball and the raceway and the vertical line of .the bearing axis on the radial plane. The load is transferred from one raceway to another along the line connecting the contact points of the steel ball and the raceway

The four-point contact ball bearing is a single-row Angular Contact Ball Bearing, which is a separable bearing. The steel ball contacts the ring at four points, and the contact angle is 35°. It can bear radial load and axial load in two directions or combined radial and axial load.

Product category

The Angular Contanct Ball Bearings currently produced by ZWZ can be roughly divided into the following structural types:

• Single Direction Angular Contanct Ball Bearings
• Double Direction Angular Contanct Ball Bearings
• Paired Angular Contact Ball Bearings
• Four Point Contact Ball Bearings

Equivalent dynamic load

Single-row Angular Contact Ball Bearing with a contact angle of 15°

Single bearing or tandem configuration

When Fa/Fr≤e, P=Fr [kN]

When Fa/Fr>e, P=0.44Fr+YFa [kN]

Back-to-back, face-to-face configuration

When Fa/Fr≤e, P=Fr +Y1Fa [kN]

When Fa/Fr>e, P=0.72Fr+Y2Fa [kN]

e, Y, Y1, Y2 values are shown in the table below

Single-row Angular Contact Ball Bearing with a contact angle of 25°

Single bearing or tandem configuration

When Fa/Fr≤0.68, P=Fr [kN]

When Fa/Fr>0.68, P＝0.41Fr+0.87Fa [kN]

Back-to-back, face-to-face configuration

When Fa/Fr≤0.68, P=Fr+0.92Fa [kN]

When Fa/Fr>0.68, P=0.67Fr+1.41Fa [kN]

Single-row Angular Contact Ball Bearing with a contact angle of 40°

Single bearing or tandem configuration

When Fa/Fr≤1.14, P=Fr [kN]

When Fa/Fr>1.14, P=0.35Fr+0.57Fa [kN]

Back-to-back, face-to-face configuration

When Fa/Fr≤1.14, P=Fr +0.55Fa [kN]

When Fa/Fr>1.14, P=0.57Fr+0.93Fa [kN]

Double-row Angular Contact Ball Bearing

When the contact angle is 30°

When Fa/Fr≤0.8, P=Fr +0.78 Fa [kN]

When Fa/Fr>0.8, P=0.63Fr+1.24Fa [kN]

When the contact angle is 45°

When Fa/Fr≤1.34, P=Fr +0.47Fa [kN]

When Fa/Fr>1.34, P=0.54Fr+0.81Fa [kN]

Cage

The cage generally adopts stamped cage, solid brass cage and nylon cage. The materials are steel, brass and synthetic resin, etc.

For single-row and matched Angular Contact Ball Bearing and their modified structures: when the bearing outer diameter D≤250mm, the contact angle α=15°, 25°adopts phenolic laminated cloth tube solid cage; α=40°adopts stamped steel cage; The suffix of the cage is not marked. When the the bearing outer diameter D>250mm, use solid brass or duralumin cage; Class P5, P4, P2 use phenolic laminated cloth tube solid cage;

Angular Contact Ball Bearing with locks on the inner ring and their variants use phenolic laminated cloth tube solid cages; the suffix of the cage is not marked.

The operating temperature of bearings with nylon cage can reach up to +120℃. For bearings that need to operate continuously under high temperature or harsh conditions, a solid brass cage can be considered.

The four-point contact ball bearing adopts a solid brass cage, and the suffix of the cage is not marked.

If you need a bearing with a non-standard cage, please contact ZWZ in advance.

Alignment error

Single-row Angular Contact Ball Bearing have limited ability to allow angular errors. Without excessive stress on the bearing, the allowable angular error between the inner and outer rings depends on the radial clearance of the bearing in operation, the size of the bearing, the internal design, and the forces and moments acting on the bearing. Due to the complex relationship between these factors, a specific common value cannot be given.

When there is an angular error between the inner and outer rings, the matched bearings, especially the back-to-back bearing group with small axial clearance, will cause the steel ball to bear greater load, thus increasing the stress on the cage and shortening the working life of the bearing . Any angular error will cause an increase in noise.

When there is an angular error between the inner and outer rings of a double-row ACBB, it will cause the steel ball and raceway to bear a greater load. Any angular error will increase the noise and shorten the bearing life.

 clearance and pre-tightening

Single-row Angular Contact Ball Bearing can reach a certain internal clearance only after installation, which depends on the adjustment of the second bearing. The axial clearance of the four-point contact ball bearing provided by ZWZ is the axial clearance of the basic class. Other clearance classes and non-standard clearances need to be verified with ZWZ’s product engineers before ordering products.

The mached bearings are divided into two ways of preload (pre-tightening load) and pre-clearance (preset clearance).

Preload:

GA – light preload

GB – medium preload

Pre-clearance:

CA – small axial clearance

CB – medium axial clearance

CC – large axial clearance

Preload

The light, medium and heavy preload values (unit: N) of matched bearings back-to-back (DB type) or face-to-face (DF type) are shown in the following table:

The contact angle is 15°.

Tolerance

ZWZ produces standard series single-row Angular Contact Ball Bearing, which are mainly produced according to general tolerances, and also provide products above Class 6. Tolerance classes for individual bearings in matched bearings, for bearings with α= 15°and α= 25°, are provided with tolerances of Class 5 or above; for bearings with α= 40°, provided with tolerances of Class 6 or above. According to user needs, corresponding products can also be provided with special tolerance classes of 4A and 2A. Double-row ACBB are mainly produced with the 0-class tolerance, and products with above 6-class tolerance are also available.

Dimensions

The basic dimensions of Angular Contact Ball Bearing:

2.2.1  Single-row ACBB

Inner diameter: 25mm～1180mm

Outer diameter: 62mm～1420mm

Width: 16mm～106mm

2.2.2  Double-row ACBB

Inner diameter: 35mm～320mm

Outer diameter: 72mm～460mm

Width: 27mm～160mm

2.2.3  Matched ACBB

Inner diameter: 30mm～1320mm

Outer diameter: 62mm～1600mm

Width: 32mm～244mm

2.2.4  Four-point contact ball bearings

Inner diameter: 30mm～560mm

Outer diameter: 72mm～780mm

Width: 19mm～90mm

Code description

A  The contact angle is 30°.

AC  The contact angle is 25°.

B  The contact angle is 40°.

C  The contact angle is 15°.

C1  Clearance meets Group 1 of the clearance regulations.

C2  Clearance meets Group 2 of the clearance regulations.

C3  Clearance meets Group 3 of the clearance regulations.

C4  Clearance meets Group 4 of the clearance regulations.

C9  Clearance is different from current standards.

When there are two or more clearances different from the current standard in the unified code, additional numbers shall be used.

CA  Axial clearance is smaller.

CB  Axial clearance is greater than CA.

CC  Axial clearance is greater than CB.

CX  Axial clearance is non-standard.

D  Double-row ACBB, with double inner rings and contact angle of 45°.

DC  Double-row ACBB, with double outer rings.

DB  Two ACBB are used for back-to-back mounting in pairs.

DF  Two ACBB are used for face-to-face mounting in pairs.

DT  Two ACBB are used for tandem mounting in the same direction.

DBA  Two ACBB are used for back-to-back mounting in pairs, with light preload.

DBAX  Two ACBB are used for back-to-back mounting in pairs, with non-standard light preload.

DBB  Two ACBB are used for back-to-back mounting in pairs, with medium preload.

DBBX Two ACBB are used for back-to-back mounting in pairs, with non-standard medium preload.

DFA  Two ACBB are used for face-to-face mounting in pairs, with light preload.

DTA Two ACBB are used for tandem mounting in the same direction, with light preload.

F1  Solid carbon steel cage.

F3  Solid ductile iron cage.

GA  Light preload, with smaller preload value.

HA  Ring, rolling element and cage or only the ring and rolling element are made of vacuum smelted bearing steel.

J  Stamped steel plate cage, with additional number for distinction when the material changes.

K  Tapered bore bearing, with taper of 1:12.

L3  Solid zinc-based aluminum alloy cage.

M  Solid brass cage.

N1  Bearing outer ring has a positioning notch.

P4  Dimension accuracy and rotation accuracy comply with ISO tolerance Class 4.

P4A  Tolerance class is higher than P4.

P5  Dimension accuracy and rotation accuracy comply with ISO tolerance Class 5.

Q1  Solid aluminum iron manganese bronze cage.

Q5  Solid tin bronze cage.

RS  Bearing with a skeleton rubber seals on one side (contact).

2RS  Bearing with RS seals on both sides.

S0  Bearing ring has high tempering treatment, and the operating temperature can reach 150°C.

T  Solid phenolic laminated cloth tube cage.

TA  Solid phenolic laminated cloth tube cage, with outer ring guide.

TN1  Nylon cage.

TYN  Polyamide resin cage.

V1  Vibration speed group conforms to V1 class specified by the standard.

W 33  There are oil grooves and three lubricating holes on the outer ring of the bearing.

W 33 A  There are oil grooves and four lubricating holes on the outer ring of the bearing.

X1  Outer diameter is non-standard.

X2  Width (height) is not standard.

X3  Outer diameter and width (height) are non-standard (standard inner diameter).

YA1  The outer surface of the bearing outer ring is different from the standard design.

YA3  The end face of the bearing ring is different from the standard design.

YA6  Bearing assembly chamfer is different from the standard design.

YA8  Cage structure changes.

YB2  Bearing size and tolerance requirements change.

3D graphics

2D graphics