What Are The Angular Contact Ball Bearings For Machine Tools?

The radial load angular contact ball bearings used on machine tools are non-separable bearings with inner and outer rings that are not separated. The bearing series include 78, 79U, 70U, 72, HSE9, HSEO, BNS9, BNSO, BNT9, BNTO, BNT2, etc. The connecting line connecting the ball and the inner and outer rings of the angular contact ball bearing forms a certain angle in the radial direction. According to the functions required for high speed and rigidity, the contact angles are 15 degrees (contact angle code C), 20 degrees (no code), 25 degrees (contact angle code AD), and 30 degrees (no code).
 

Angular contact ball bearings for machine tool spindles are generally divided into open type and with seals, as follows:
 

I. Open type Angular contact ball bearings

(1) Standard angular contact ball bearings (78, 79, 70, 72)
The standard angular contact ball bearing series include 78, 79, 70, and 72. The 79 and 70 types have been optimized for high speed and low temperature rise by optimizing the internal structure. The contact angles are 15 degrees (C), 25 degrees (AD), and 30 degrees (no code). 25 degrees and 30 degrees are specially set for 79U and 70U. The precision of this bearing is above JIS grade 5, and it has the characteristics of high speed, high rigidity and high load capacity. There are also bearings using ceramic balls in this type of product.

(2) High-speed angular contact ball bearings (HSE type)
There are two types of high-speed angular contact ball bearings, HSE9 and HSE0. Its main dimensions are consistent with the JIS dimension series (9, 0), and the contact angles are 15 degrees (C), 20 degrees (no code), and 25 degrees (AD). The precision of this bearing is above JIS grade 5. Compared with standard angular contact ball bearings, its ball diameter is smaller and it focuses on high speed. In addition, by chamfering one side of the inner ring outer diameter and the outer ring inner diameter, the oil flowability in oil-gas lubrication is enhanced, and special materials and surface modification are used to greatly improve the wear resistance and sintering resistance of the bearing. There are two types of balls in this type of bearing: steel balls and ceramic balls.

(3) Angular contact ball bearings with ultra-high-speed ceramic balls (HSF type)
The HSF0 type of angular contact ball bearings with ultra-high-speed ceramic balls uses ceramic balls with a smaller ball diameter than the HSE0C type to ensure rigidity while reducing the temperature rise. In addition, considering that the contact angle changes during rotation due to the effect of centrifugal force, a contact angle of 25 degrees is used.
This measure allows oil-gas lubrication to be used in areas that could only be operated under jet lubrication in the past.

(4) Environmentally friendly oil-gas lubricated angular contact ball bearings (HSL, HSFL types)
Environmentally friendly oil-gas lubricated angular contact ball bearings HSL and HSFL types are oil-gas lubricated angular contact ball bearings that have an appropriate angle of the inner ring outer diameter (locking mouth) of the HSE or HSF type, are equipped with circumferential grooves, and use environmentally friendly nozzles. While maintaining the high speed of the HSE or HSF type, it can also reduce noise and reduce the amount of air and oil used. Energy-saving products. The bearing accuracy of this model is above JIS grade 5. The HSL type has three contact angles of 20 degrees (no code) and 25 degrees (AD), and the HSFL type has only one contact angle of 25 degrees. They need to be used in combination with special environmental requirements.

(5) Oil-gas lubricated high-speed angular contact ball bearings with oil holes in the outer ring (HSEW type)
The HSEW type oil-gas lubricated high-speed angular contact ball bearings with oil holes in the outer ring are high-speed angular contact ball bearings designed with oil holes on the outer ring of the HSE type, which are specially designed for oil-gas lubrication. Since there is no need to machine the nozzle hole on the washer, the washer width is shortened, which not only contributes to the compactness of the spindle, but also improves the rigidity by configuring the bearing at the front end of the tool. In addition, the method of directly supplying oil from the outer ring improves lubrication reliability and reduces air flow and oil supply. The bearing accuracy of this series is above JIS grade 5, and it is divided into two categories: contact angle 20 degrees (no code) and 25 degrees (AD).
 

2. With seals Angular contact ball bearings

(1) Grease-lubricated sealed standard angular contact ball bearings (79 LLB/70 LLB type)
Grease-lubricated sealed standard angular contact ball bearings 79 LLB/70 LLB type are based on the original 79 and 7G sizes, with non-contact rubber seals installed on both ends of the bearing, and the internal structure is optimized. Special grease is encapsulated to achieve high speed, long life and environmental protection. There are two types of contact angles: 15 degrees (contact angle code CD) and 25 degrees (contact angle code AD), and the accuracy is special accuracy P42 (dimensional accuracy JIS grade 4, rotation accuracy JIS grade 2). Since grease is pre-packaged inside, it does not need to be cleaned, so it is easy to use and environmentally friendly. This type of bearing has two types of balls: steel balls and ceramic balls.

(2) Grease-lubricated sealed high-speed angular contact ball bearings (BNS LLB type)
Grease-lubricated sealed high-speed angular contact ball bearings BNS LLB type products are based on the original HSE type dimensions. Non-contact rubber seals are installed on both ends of the bearing. While optimizing the internal structure, special grease is packaged to achieve high speed, low temperature rise, long life and environmental protection. Its contact angle is 15 degrees (contact angle code C), 20 degrees (no code) and 25 degrees (contact angle code AD) with an accuracy of JIS4 or above. The raceway ring is made of special materials and the surface is modified to greatly improve the wear resistance and sintering resistance. Since grease is pre-packaged inside, it does not need to be cleaned, so it is easy to use and environmentally friendly. This type of bearing has two types of balls: steel balls and ceramic balls.

 Angular Contact Ball Bearings Used On Machine Tools Are Available In Stock