The two rows of rollers in the bearing are arranged in a crossed manner

They are held by a seat ring with lubricating oil holes, two shaft washers, a spacer ring and two sets of steel balls.1. Deep groove ball bearings This type of bearing is generally only used to bear radial load. Cylindrical bore bearings are usually hot-mounted to reduce the bearing clearance by using interference fit, or to achieve the purpose of preloading.

As a new structure, it is currently mostly used for spindles such as grinding machines, lathes, boring machines, milling machines, drilling machines, etc. Choosing a suitable spacer height can make the bearing have the required preload after assembly. Above, it is often combined with double row cylindrical roller bearings in use.

For NNU49 series bearings with a separable inner ring, the raceway is generally processed after the inner ring is equipped with a spindle to obtain high spindle rotation accuracy. However, the manufacturing process of this kind of bearing is complicated, and the requirements for the lubrication system of the machine tool are also high, and it is generally only used on the horizontal spindle with special requirements.

Tapered roller bearings can bear radial and axial loads at the same time,Wholesale bearing mechanical and double-row tapered roller bearings can bear two-way axial loads. Hollow tapered roller bearings can use oil to cool the rollers to reduce the temperature rise and increase the allowable speed.

Since the clearance is not adjustable, it is often used in occasions that require low precision and do not need preload, such as ordinary drilling machine spindles., and the rigidity of the main shaft can be improved by pre-tensioning. The two rows of rollers in the bearing are arranged in a crossed manner, the fluctuation frequency during rotation can be doubled compared with the single row bearing, and the amplitude is reduced by 70%. 

The clearance meets the 3 groups specified by the standard

NR-FAG bearing with stop groove and stop ring on the outer ring. FA——Steel solid cage, outer ring guide. Mainly refers to cylindrical roller FAG bearings and deep groove ball FAG bearings with inner diameter d>60mm. LA——Light metal solid cage with outer ring guide. Example: 6207N. Example: 6207. Example: GS.2ZRN.790144-FAG bearing can be used for high temperature and low speed, after special heat treatment, steel stamping and riveting cage, large clearance, after phosphating treatment, grease injection, the service temperature can exceed 270℃. M, M1-brass solid cage.

A or B is placed after the cage code, A means the cage is guided by the outer ring, and B means the cage is guided by the inner ring. Post code-Clearance C1-Clearance meets the standard requirements of 1 group, less than 2 groups.3541). Example: NU207V.ZB. N-FAG bearing with stop groove on the outer ring. For example, 31314A. For example, B7004C. VT——Full complement rolling element FAG bearing with isolation ball or roller.160——6212FAG bearing, axial clearance 120μm to 160μm. Example: 6207ZRN.

K2——Two sets of deep groove ball FAG bearings are installed in pairs to bear bidirectional axial load. Example:Mechanical roller bearings manufacturers 6207. K30-taper bore FAG bearing, taper 1:30. K7-Two sets of angular contact ball FAG bearings are installed back to back without clearance (O-type installation).ZB-cylindrical roller with convexity with a diameter greater than 80mm.

FP——Steel solid window type cage.20——6210FAG bearing, radial clearance 10μm to 20μm.81108R-FAG bearing without separable inner ring or outer ring.HG.K5. K4——Two sets of deep groove ball FAG bearings are installed face to face without clearance (X-type installation). WS-Thrust cylindrical roller FAG bearing ring. .K5.81112. Example: 2308K. When installing bearings belonging to the same group, the installation should be carried out in accordance with the markings and positioning lines.

C3——The clearance meets the 3 groups specified by the standard, and is greater than 0 group. Z52JN.F3. Post code-Sealing and dustproof RSR-FAG bearing has a sealing ring on one side.HG clip cloth handed to the pocket solid cage, outer ring guide, accuracy grade HG

Can bear radial load and bidirectional axial load

Two single-row angular contact ball bearings combined on the back of the structure share the inner ring and outer ring, which can bear radial load and bidirectional axial load. Sealed type bearings without filling groove. Mainly applicable cage: steel stamping cage (bowl shape.. Deep groove ball bearing. The most representative rolling bearing, widely used.

Can bear radial load and bidirectional axial load. Suitable for high-speed rotation and occasions requiring low noise and low vibration. Sealed bearings with steel dust caps or rubber seals are pre-filled with an appropriate amount of grease. Bearings with a stop ring or flange on the outer ring, which are easy to locate in the axial direction, and are easy to install in the housing.

The size of the maximum load bearing is the same as the standard bearing, but there is a filling groove in the inner and outer rings, which increases the number of balls and increases the rated load.Mainly applicable cage: steel stamping cage (wave, crown shape. Woodworking machinery, textile machinery drive shaft, vertical belt seat self-aligning bearing.

The cylindrical roller is in line contact with the raceway, and the radial load capacity is large, that is, it is suitable for bearing heavy loads and impact loads, and also suitable for high-speed rotation. N-type and NU-type can move axially, and can adapt to thermal expansion or installation errors. According to the difference of the internal structure, it is divided into four types: R, RH, RHA and SR mechanical bearings manufacturers Since the arc center of the outer ring raceway is consistent with the bearing center, it has self-aligning performance, so it can automatically adjust the axis misalignment caused by the deflection or misalignment of the shaft or housing.

Can bear radial load and bidirectional axial load. According to the state of the bearing, the clearance can be divided into the following three types: Original clearance. The clearance in the free state before the bearing is installed.2RS, 23. The maximum amount of movement in the radial direction is called radial clearance, and the maximum amount of movement in the axial direction is called axial clearance.