|
|
|
|
|
|
Ball Bearings
Ball bearings are machinery components, which comprise an outer ring, inner ring, balls, retainers, shields and snap rings. Miniature bearings and small-sized ball bearings have up to 30mm in external diameter. Essential to high-precision rotary components, ball bearings determine rotational accuracy.
Bearing types include Radial Ball Bearings (Deep Groove and Angular Contact) and Thrust Ball Bearings. Radial bearings are designed to carry both radial and axial (thrust) loads, while thrust bearings are designed for pure thrust loads only. Many different configurations are available for ball bearings.
Miniature Bearings
Our miniature bearings range in sizes from .1181 to 1.000 inch O.D. (3mm to 26mm), and are available in inch and metric sizes.
Miniature bearings and instrument bearings are single row bearings. The construction of these miniature bearings enables them to carry moderate radial and thrust loads at low operating torque while providing high performance within a small envelope design. Miniature bearings and instrument bearings are typically available in both stainless steel for those applications requiring corrosion resistance and chrome for maximum fatigue life.
Minebea manufactures more than 8,500 different types of miniature and small-sized bearings, most of which have external diameters of 22mm or less.
|
|
Axial deep groove ball bearings comprise shaft locating washers, housing locating washers and ball and cage assemblies. The bearings are not self-retaining; the ball and cage assembly and bearing washers can therefore be fitted independently of each other.
In addition to series with flat washers, there are also series with spherical housing locating washers for compensation of static misalignment. These designs are normally used in comjunction with support washers. Axial deep groove ball bearings are available in single and double direction designs.
Both designs can support high axial forces but must not be subjected to radial loads.
|
|
|
|
|
|
Bearings of this type consist of the washers with raceways and an assembly of ball and cage. The washer that contacts the shaft is called the shaft washer, and the one attached to the housing is called the housing washer. Thrust ball bearings are designed to accommodate thrust loads at moderate speeds, for practical purposes their radial load capacity is nil. The mounting is relatively simple as the washers and the ball and cage assembly can be mounted separately as Thrust ball bearings are separable.
Bearings with a sphered housing washer can be used together with a sphered seating washer to compensate for misalignment between the support surface in the housing and the shaft as it’s important to keep the thrust bearings square with the shaft. However, the ability of the self-aligning seat to follow shaft wobble or misalignments is still quite limited.
Double direction thrust ball bearings characteristics are identical to those of the one-directional bearing, except it can accommodate axial loads acting in both directions and can thus serve to axially locate a shaft in both directions. To prevent adverse influence of centrifugal forces and gyration moments the single and double direction thrust ball bearings must be constantly subjected to a specific minimum load.
|
|
|
Thrust ball bearings are made as single and double direction bearings. Both designs can transmit high axial loads but must not be loaded radially. Besides the design with flat washers, thrust ball bearings with spherical housing washers and seating washers are available.
|
|
|
|
|
|
RKB thrust ball bearings are manufactured in single and double directions. They can carry only heavy axial loads.
The single direction bearings consist of shaft washer, housing washer and ball cage assembly.
Thrust ball bearings with sphered housing washer can be used with sphered seating housing to compensate the misalignment between the support surface and in the shaft.
The boundary dimensions of RKB thrust ball bearings in metric size conform to ISO 104/1979.
They are produced to normal tolerance class in accordance with ISO 199/1997.
RKB big size thrust ball bearings are normally fitted with machined brass cage(suffix M). Machined steel cage (suffix F) is available.
RKB cylindrical roller thrust bearings are generally used to take over heavy pure axial loads, to carry shock loads and to be stiff into a little axial space with simple design.
Double direction cylindrical roller thrust bearings can be easily obtained.
In case of more rows, the rollers have various lengths and are alternatively mounted.
The boundary dimensions is conform to ISO 104/1979.
In order to guarantee a proper arrangement of the rolling parts for the satisfactory operation, they have always to be submitted to a given minimum load.
Both machined brass and steel cages are available as standard.
RKB production range also includes inch size cylindrical roller thrust bearings.
There are standard design variations of RKB inch series. Each design is based on a standard single acting with addition of special components: the AT aligning type; the crane hook thrust type; the DT double acting thrust bearing and the DAT aligning style combination of DT and AT types; the SDT simplified double acting thrust.
|
|
|
|
|
|
Thrust Ball Bearings
Single Direction Thrust Ball Bearings
Thrust ball bearings are designed to handle axial loads only.
Thrust ball bearings consist of ball, retainer and both shaft and housing washers which contain grooves for the ball.
The double Direction Thrust ball bearings can support bi-directional loads.
Thrust ball bearings are designed to handle axial loads only.
Thrust ball bearings consist of ball, retainer and both shaft and housing washers which contain grooves for the ball.
The double Direction Thrust ball bearings can support bi-directional loads.
Double-direction Thrust Ball Bearings
Carrying axial loads in both directions.
This Bearing consists of 3 kinds of grooved washer bearing rings, 2 kinds of cage and ball assembly.
Aligning seat washers with an aligning surface radius are also available for ease of design and mounting against a flat housing shoulder.
Double-direction Thrust Angular Contact Ball Bearings TAD series
Double-direction Thrust Bearing used in machine tool spindle. High contact angles carry high axial loads.
|
|
Torque Transmission's Thrust Bearing design incorporates the optimum combination of molded nylon retainer, with hardened grade steel balls and washers. The self-lubricating property of nylon, combined with the hardened steel, high-grade balls reduces friction and the micro finish thrust washers reduce noise and increase durability.
We manufacture high quality thrust bearings in a wide range of sizes - standard, metric and custom dimensions - to meet your specific application.
High Quality Construction:
- Retainers are injection molded 6/6 nylon held to a rigid design criteria assuring consistent quality
- Hardened steel balls are grade 100 tolerance (±.0001", ±.0025mm)
- The thrust washers are hardened finished to micro 10
|
|
races: unless indicated as being polypropylene or polyethylene, all races are acetal.
balls: all balls are carbon steel. Other ball grades may be available upon request.
|
|
Thrust ball bearings are divided into single and double direction types. The former is able to accommodate axial load in one direction, while the latter is able to accommodate it in both directions. Neither is suitable for applications that involve radial load or high-speed rotation.
Bearings whose housing washer back face is spherical (with a spherical back face or aligning seat washer) are designed with a self-aligning capability and can accommodate the effects of inaccurate mounting.
|
|
Thrust ball bearings are separable axial bearings:
- Available in single direction and double direction designs
- Suitable for relatively high axial loads
- Low to medium speed ratings
- Standards: DIN 616, DIN 711, DIN 715
- Series: 51100, 51200, 51300, 51400
- Application examples: vertical shafts, etc.
|
|
Thrust ball bearings can handle axial loads only. Bearing rings mounted on the shaft are called shaft washers, and those mounted in the bearing housing are called housing washers. Both washers contain grooves for the balls. Thrust Ball bearings are of two types: single type which can support axial loads in only on direction and double type that can support bi-directional loads.
The central washer of double type thrust ball bearing is located in an axial direction by a shaft shoulder and sleeve. Thrust Ball bearings are not suitable for high-speed rotation since lubricant is expelled by centrifugal force. When used on a horizontal shaft, a minimum axial load must be applied. Pressed steel plate, polyamide resin, machined high-strength brass or mild steel are used for cages. Care must be taken in handling to prevent damage to the separable rings and ball assembly.
|
|
|
Thrust ball bearings consist of a shaft washer,a housing washer and a ball and cage thrust assembly.Th bearings are separable so that mountingg is simple as the washers and the ball and cage assemble can be mounted separately.Thrust ball bearings ,as their name suggests,can accommodate axial loads in one direction and thus locate a shaft axially in one direction.They must not be subjected to any radial load.
|
|
|
|
|
|
Bearings of this type consist of the washers with raceways and an assembly of ball and cage. The washer that contacts the shaft is called the shaft washer, and the one attached to the housing is called the housing washer. Thrust ball bearings are designed to accommodate thrust loads at moderate speeds, for practical purposes their radial load capacity is nil. The mounting is relatively simple as the washers and the ball and cage assembly can be mounted separately as Thrust ball bearings are separable.
Bearings with a sphered housing washer can be used together with a sphered seating washer to compensate for misalignment between the support surface in the housing and the shaft as it's important to keep the thrust bearings square with the shaft. However, the ability of the self-aligning seat to follow shaft wobble or misalignment's is still quite limited.
Double direction thrust ball bearings characteristics are identical to those of the one-directional bearing, except it can accommodate axial loads acting in both directions and can thus serve to axially locate a shaft in both directions. To prevent adverse influence of centrifugal forces and gyration moments the single and double direction thrust ball bearings must be constantly subjected to a specific minimum load.
|
|
|
Slewing Rings is a kind of large size bearing. It can endure integrated load,and also can accommodate heavy radial load,axial load and incline moment of force.It is generally made up of mounting bore,inne gear or outer gear, lubrication bore and seal device.There are so many good character.Such as compact structure,light weight,good rigidity, steady rotation,high precision and safety etc.This bearing is widely used in the fields of engineering,metallurgy,mines petroleum,chemical industry ,light industry,aviation,ports,shipping,war industry,instrument and meters,etc.inner bore size ranges from 500mm to 4500mm.
|
|
| ... products without technical information |
| |
Angular contact ball bearing, suitable for high-speed and high-precision rotation, is mainly used in the principal shaft in machine tools, HF motor, gas turbine, oil pump, air compresser, printing machine, etc.
Main specifications of ZQZ bearings include 71900, 7000, 7200, 7300 and 7400.
|
|
Deep groove ball bearing, featured of simple structure and convenient using, is the kind of bearing that is used the most extensively in the world. With little friction coefficient and high limit speed, it can be used to bear axial load when the rotate speed is too high and thrust ball bearing is not suitable to be used.
ZQZ deep groove ball bearing (open) mainly incudes: 6000, 6200, 62200, 62300, 16000, 6300, 6400, etc.
|
|
|
|
