The ball bearing of major groove is the most ordinary kind of type in antifriction bearing. The ball bearing of major groove of the basic model is by an outer lane, an inner circle, a series of steel balls and a series of retainers are constructed. The ball bearing type of major groove has two kinds of unilines and biserials, ball structure of major groove is also divided into two kinds of structure of sealing and open system, the open system refers to the bearing without containment structure, the major groove ball of the sealed is divided into and sealed and defended oil-tight dustproofly. The dustproof Sealing Cover material is rammed for the steel plate, only get up to enter the ball track of bearing to the simple prevention dust. It is a contact-type oil seal to defend the oil type, can be valid to prevent the inner grease of bearing to overflow.
Uniline’s major groove ball bearing type coaxiality is 6, the two-bank ball bearing coaxiality of major groove is 4. It is simple in construction, easy to use, it is most general to produce, employ the most extensive kind of bearing.
The major groove ball bearing mainly bears the radial load, can also bear radial load and axial load at the same time. When it only bears the radial load, the contact angle is zero. When ball bearing has a greater radial backlash in the major groove, have characteristic that angles are exposed to the bearing, can bear the greater axial load, the coefficient of friction of the ball bearing of major groove is very small, the terminal rotational speed is very high too. The ball bearing of major groove is simple in construction, easy to reach higher manufacture precision compared with other types, so is easy to produce in enormous quantities as the series, the manufacturing cost is lower, it is extremely general to use. The ball bearing of major groove is besides basic model, and various structure of modifying, for instance: The ball bearing of major groove with dust cap, the ball bearing of major groove with rubber grommet, there is ball bearing of major groove of the locking recess, there is a ball bearing of major groove of the large load capacity which holds the ball gap, two-bank ball bearing of major groove.
The ball bearing of major groove has a representative antifriction bearing most, have wide use range. Suitable for the operation of the even extremely high rotational speed of the high rotational speed, and very durable, do not need to safeguard frequently. The coefficient of friction of this kind of bearing is small, the terminal rotational speed is high, simple in construction, make low cost, it is apt to reach the great to make precision. Dimensional range and form change variously, apply to trades such as accurate instrument, electrical machinery, car, motorcycle and general machinery with low noise,etc., use the most extensive kind of bearing in the mechanical industry. Mainly bear radial load, can also bear a certain amount of axial load.
Choose and increase as compared to axial bearing capacity at the time of the great radial backlash, the contact angle is zero while bearing pure radial force. When there is function of axial force, the contact angle is greater than zero. Generally adopt and ram the wave shape retainer, the car makes entity retainer, adopts nylon shelf too sometimes.
The ball bearing of major groove is installed after on the axle, within the range of axial backlash of the bearing, the axial displacement of the controllable axle or outer cover, two directions, so can be positioning axially bidirectionally. In addition the bearing have certain the intersection of cente adjusting and ability also, as 2 ‘ when the 10 ‘ of inclined relative to exterior shell holing, can still work normally, but there is a certain influence on bearing life-span. Ball bearing retainers of major groove are mostly that the steel plates ram the wave shape retainer, the large-scale bearing adopt the car to make metal entity retainer more.
The ball bearing of major groove is the most frequently used antifriction bearing. It is simple in construction, easy to use. Mainly used for bearing the radial load, but when increasing the radial backlash of bearing, have characteristic that certain angles are exposed to the ball bearing, can bear the foot-path, axial union load. When the great of rotational speed and it is unsuitable to adopt the thrust ball bearing, can also be used for bearing the pure axial load. Compared with other type of bearing that the ball bearing specification of major groove is the same in size, the coefficient of friction of this kind of bearing is small, the terminal rotational speed is high. But not shock-resistant, not suitable for bearing the heavy load.