Precision spindle bearings include precision angular contact ball bearings 70 series, 719 series, and 72 series, precision cylindrical roller bearings N10 series, NN30 series, and precision ball screw support bearings TAC series. The following focuses on bidirectional thrust angular contact ball bearings.
Bidirectional thrust angular contact ball bearings
1. Range: inner diameter 80 mm to outer diameter 600mm2. Accuracy: UP, SP, P4, P53. Size series: BS1747TN1 BS2047TN1 BS2562TN1 BS3062TN1 30TAC62BSUC10PN7B etc.
4. The nominal contact angle of the bearing is 60 degrees.
5. Preload the bearing after assembly.
6. High rotation accuracy
7. Precision bearings for machine tool spindles
The correct configuration of spindle bearings refers to the combination of bearing types and the arrangement of front and rear bearings. Different configurations determine the different load capacities, operating speeds, stiffness, temperature rise and service life of the machine tool spindle, especially the impact on stiffness and temperature rise. It is more significant [Note], so the spindle bearings should be reasonably configured according to the requirements of the machine tool's working characteristics. The purpose of the running-in operation is to ensure that the rollers and raceways of the bearing have good contact conditions through running-in before the bearing is officially angled, so as to maintain good contact accuracy of the bearing and avoid the bearing initially operating at high speed and speed. Heavy load use causes damage to the rollers and raceways, thereby improving the life and accuracy of the bearing. Since the tapered roller bearing is not in complete rolling contact, there is sliding between the roller end surface and the shoulder of the inner ring. If the contact conditions are not good, bite damage will easily occur, so more attention should be paid to the running-in operation of this type of bearing. Spindle bearings are spindle bearings for precision machine tools and similar equipment. They ensure the working accuracy and performance of precision machine tools.
Bidirectional thrust angular contact ball bearings
The fit between the inner ring and the shaft aims at a state with no interference and no clearance (Line to Line). The fit between the outer ring and the housing hole is a dynamic fit.
When used in parallel with double row cylindrical roller bearings in a housing with the same inner diameter, the outer diameter dimension tolerance is f6 to achieve a dynamic fit.
Thrust angular contact ball bearings for ball screw supports
H5 is recommended as the dimensional tolerance of the shaft, and H6 is recommended as the dimensional tolerance of the housing hole.
Bearing clearance and preload
When installing the bearing, in order to apply an appropriate preload, the axial clearance is specified as follows.
Bidirectional thrust angular contact ball bearing-------------------------------------------------C7 clearance
Thrust angular contact ball bearing for ball screw support frame---------------------C10 clearance
TAC series spindle bearings
TAC series bearings are thrust angular contact ball bearings used for NSK ball screw support. TAC series bearings include: open bearing series and sealed bearing series. The TAC series of special bearings for NSK ball screws have high stiffness and high performance, and a sealed series has been added, with a complete range of models and a wide range of uses.
Features of TAC series spindle bearings
1. High performance design
High stiffness: large number of steel balls, 600 contact angle, high stiffness.
Long life: Using EP steel with long life and high reliability, the life is 3 times that of ordinary bearing steel SUJ2.
2. Contact sealed bearing series: high reliability, high dust resistance
Sealed bearings have good dust resistance and grease is not easy to leak. And it adopts light contact sealing ring, which has low bearing torque and low heat generation.
3. Easy to install
Open bearings: Grease-filled products are available to shorten installation time.
Sealed bearing: It has been filled with grease, and the seal rings on the back and front are in different colors, making it easy to identify the direction.
Thrust angular contact ball bearings for ball screw support, open bearing series, sealed bearing series.
TAC series product types
TAC series bearings have many types of products:
TAC series open bearing inner diameter range: 15 to 60mm
TAC series sealed bearings, with high dustproof and light contact sealing rings, adopt a special sealing lip shape design and have been widely used in automotive generators. Bearing inner diameter range: 15 to 45mm
TAC series spindle bearing material
NSK TAC series bearings are made of EP steel and have outstanding characteristics of long life. The EP steel developed by NSK has the characteristics of high purity, ultra-long life, and high reliability. The rolling fatigue life is three times that of ordinary bearing steel SUJ2.
TAC series bearings adopt high dustproof light contact sealing rings to improve reliability. TAC series bearings adopt NSK's self-developed light contact sealing ring, which has excellent high-speed performance, small temperature rise and high reliability.
TAC spindle bearing model composition
TAC bearing model example: 30TAC62BDDGSUC10PN7BWPHL
Nominal bearing inner diameter: 30
Bearing type code: TAC
Nominal bearing outer diameter: 62
Internal form code: B
Seal ring code: DDG
Combination form code:SU
Preload code: C10
Accuracy code: PN7B
Grease code: WPHL
Hot Tags: ball screw bearings for nsk, China ball screw bearings for nsk suppliers, factory, cylindrical roller bearing without inner ring, rollway spherical roller bearing, Eccentric bearing, spherical plain bearing for Japanese, Tapered Roller Bearings for Japan NSK, drawn cup needle roller bearing open end
