Roller Bearing

Manufacturer supplier exporter of roller bearing!
As one of the leading roller bearing manufacturers, suppliers, and exporters of mechanical products, We offer roller bearing and many other products. Please get in touch with us for details.

About Roller Bearing

Roller bearings — are similar to ball bearings in that they are designed to carry a load while minimizing friction. Roller bearings transmit loads using rolling cylinder elements rather than balls to maintain the separation between moving parts of the bearing. These versatile bearings can contain single or multiple rolling elements; various rows can significantly improve radial load capacity. Also, different roller shapes can further reduce friction and support both radial and axial loads.
Cylindrical roller bearings
Cylindrical roller bearings have high radial load capacity and moderate thrust loads. They contain rollers that are cylindrically shaped but are not true cylinders. Instead, these rollers are crowned or end-relieved to reduce stress concentrations. This geometry results in low friction and allows for high-speed applications.
Needle roller bearings
Needle bearings are heavily used in automobile components such as rocker arm pivots, pumps, compressors, and transmissions. The drive shaft of a rear-wheel-drive vehicle typically has at least eight needle bearings (four in each U joint) and often more if it is particularly long or operates on steep slopes.
Tapered roller bearings
These roller bearings use conical rollers that run on conical races. Most roller bearings only take radial or axial loads, but tapered roller bearings support both radial and axial loads, and generally can carry higher loads than ball bearings due to greater contact area. Tapered roller bearings are available in inch and metric sizes.
Spherical roller bearings
These types of roller bearings have an outer ring with an internal spherical shape. The rollers are thicker in the middle and thinner at the ends. Spherical roller bearings can thus accommodate both static and dynamic misalignment. However, spherical rollers are difficult to produce and thus expensive.
CARB toroidal roller bearings
CARB toroidal roller bearings are unique and accommodate misalignment without increased stress levels. They also provide frictionless axial movement within the bearing in the non-locating position in self-aligning bearing arrangements. They can accommodate higher load levels and provide significantly extended service life.
Thrust Roller Bearings
Thrust Roller Bearings are available with cylindrical or spherical rollers. Thrust bearings sustain only axial loads but have high axial rigidity which is suitable for heavy loads. They contain convex rollers, have a self-aligning capability, and are free of any influence of shaft deflection or mounting error.
Needle roller thrust bearings
Needle roller thrust bearings are fitted with a form-stable cage to reliably retain and guide many needle rollers. Needle roller thrust bearings provide a high stiffness within a minimum axial space. In applications where the faces of adjacent machine components can serve as raceways, needle roller thrust bearings take up no more space than a conventional thrust washer.
Tapered roller thrust bearings
Tapered roller thrust bearings carry axial loads with no radial load-carrying capacity. They comprise a shaft washer, a housing washer, and a roller and cage assembly and are separable. These bearings have raceways on the face of the washers. Tapered roller thrust bearings are available in a single direction, double direction, and screw-down configurations.
Spherical roller thrust bearings
Spherical roller thrust bearings have sphered rollers asymmetrically. These bearings have one shaft washer raceway and one housing washer raceway, and the load is transmitted at an angle to the bearing axis. The rollers conform closely to the inner and outer raceways giving the bearings high load carrying capacity and are internally self-aligning.

Applications of roller bearings

Roller bearings are used in rotary applications to replace sliding movement with low friction, rolling. Automated roller bearing setting techniques offer many advantages like reduced setting time, assembly cost, and reliable setting. To select the right roller bearing, one must determine the desired bearing life and a sufficient basic dynamic load rating to meet that life requirement. Roller bearings are used in power generation, wind turbines, gear drives, rolling mills, machine tool spindles, gear reduction units, etc.

Features of roller bearings

1, the friction resistance and the power consumption are small
2, easy to install and disassemble, easy to repair.
3. The structure is compact and lightweight and the axial size is narrower.
4. High precision, large load, and long service life.
5. Some bearings have the performance of automatic heart adjustment.

Some FAQ!

Features & benefits of the cylindrical roller bearing

  • Separable design for simple mounting & dismounting.
  • Interchangeable design Inner Ring can be exchanged.
  • Suitable for high speed applications.
  • Heavy radial loads.
  • Accommodates axial displacement.
– What are the features of cylindrical roller bearing?
Before a bearing is ready to be mounted, operators should confirm:

  • The housing and shaft are clean, undamaged, and dimensionally accurate.
  • The lubricant is clean and correctly specified.
  • Necessary tools and equipment are on hand.
  • Proper safety precautions are in place.
– What are the characteristics that one should look for before mounting the bearing?
As a general rule, ball bearings are used at higher speeds and lighter loads than are roller bearings. Roller bearings perform better under shock and impact loading. Roller bearings can often be disassembled and the roller carrier and rollers, or the outer or inner races, replaced individually.
– Are roller bearings better than ball bearings?
– What are the components of a roller bearing?

Radial type roller bearings (cylindrical, tapered, spherical, and needle) consist of four essential components, an inner ring, an outer ring, rollers, and a cage (roller retainer). Under normal operating conditions, bearing rings and rollers carry the load while the cage spaces and retains the rollers on the cone.

Roller thrust bearings are designed to carry pure thrust loads. However, instead of an inner and outer circle concentric to the axis of rotation, they have two rings or thrust washers on either side of the roller. Like radial roller bearings, roller thrust bearings also consist of two rings, rollers, and a cage (roller retainer).

– Important dimensions to consider when specifying bearings include?

Mainly the following aspects:

Bore – The bearing industry uses a standard number system for radial bearings with metric diameter bores. For bore sizes 04 and up, multiply by 5 to obtain the bore in millimeters. If the bore is a hex, this refers to the dimension across the flats. If the bore is tapered, this refers to the smaller diameter.

Outside diameter – The outside diameter of the bearing includes the housing of a housed unit but excludes the flange of a flanged bearing. The outer ring width is the overall width of the outside of the bearing.

Overall width – The overall width of the bearing or bearing assembly includes the locking collar, if present.

– What materials are generally used for roller bearings?
For most industrial applications, standard through-hardened rolling bearing steel is sufficient. This versatile material is heat-treated, which provides consistently high hardness distributed over the circumference and cross-section. The main attributes of this material are high hardness and wear resistance and good resistance to over-rolling.

Often bearings manufacturers are required to provide unique materials and heat treatments for specific applications or industry sectors. The aerospace sector, for example, specifies M50 steel for many applications such as main shaft bearings and turbine rotor bearings on aircraft engines.

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