Angle rolling contact ball bearing 700882DULP4 7007CTRDULP3 7012 7011 7010 7009

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Rolling Contact Bearing

Angular Contact
Applicable Industries
Building Material Shops, Manufacturing Plant, Machinery Repair Shops, Construction works , Energy & Mining, Other
Precision Rating
Seals Type
Number of Row
Single row
Chrome Steel
Long Life, High Speed,Low Noise

About Angular Contact Ball Bearings
Standard angular contact ball bearings include 718 series, 719 series, 70 series, and 72 series.
Has the following functions:
Two contact angles: C-15 degrees or AC-25 degrees.
Two different retainers: brown nylon or red Bakelite.
Two seal types: open or sealed.
Accuracy range: P5 P4 or P2
Bearing material: chrome steel inner ring, outer ring, and balls.

Rolling Contact Bearing Image


What is a rolling contact bearing?

A rolling contact bearing is a bearing with an inner and outer ring between which metal balls or rollers roll. These balls or rollers then rotate smoothly against each other.

They are usually made of stainless steel or aluminum alloy. They are used in various industries.

A rolling contact bearing has many different parts that work together to make it function properly. The rings (races), rolling elements, and cage all help make the bearing spin smoothly and smoothly.

As the bearing's rings rotate, they cause the rolling elements to roll. Without a cage, this can be problematic because the rolling elements can come into contact with each other and disturb the rolling motion.


This is why cages are needed to keep the rolling elements separated. This allows them to roll in a smooth manner and reduces friction.

Cages are usually made of steel or polyamide plastic, depending on the application and environment in which the bearing will be placed. The cage is also used to hold the balls inside the bearing, preventing them from moving around and reducing friction.

The lubrication of bearings is another very important component to keep them running properly. Using the correct lubricant helps minimize friction in rolling motion and prevents wear.

The design of rolling contact bearings includes selecting the correct size and material for the application. Dimensions and materials are determined according to the static and dynamic load carrying capacity and the required service life.

A common type of rolling bearing is the ball bearing. It consists of round metal balls or rollers that move between a fixed race and a rotating race.

These bearings can accommodate radial or axial loads as well as heavy shock loads. Their bore diameters range from 20mm to 900mm.

They can also be designed to handle misalignment and shaft deflection. They can be sleeved or mounted on holders. They are usually made of steel, but can also be made of other materials. The required service life of a bearing depends on the application and can be extended by cooling, lubrication and sealing. Materials used for bearings need to be free of microscopic defects.


Bearings are an essential part of modern equipment and machinery. They reduce friction, allow different types of loads to be carried and ensure the stability of machine parts during operation.

In order to maintain these qualities, various materials are used in the manufacture of rolling contact bearings. These include chrome steel, carbon steel and stainless steel.

Of these materials, chrome steel is the most common. It is mainly composed of carbon and contains 1.5% chromium, so it can improve corrosion resistance and hardness levels after undergoing controlled processing methods.

It is also highly resistant to bending stress and fatigue cracking due to its high core toughness level. However, when used in applications where bearing elements must be pressed together repeatedly, it can be susceptible to wear, fatigue and pressure-induced welding.

Unlike stainless steel, carbon steel is cheaper to manufacture and has a lower melting point. It can handle small heavy loads, but is less ductile and has difficulty running at high speeds.

Rolling contact bearings are an integral part of most mechanical equipment. It reduces friction, heat and wear by replacing sliding motion with low-friction rolling.

Rolling contact bearings are used to support rotating shafts against radial and axial loads and they are available in a variety of designs. They may be self-aligned or non-self-aligned, depending on the type.

The life of a rolling contact bearing is generally determined by a combination of operating speed and load. Under these conditions, the calculated life is usually at least one million revolutions.

Three common limitations to the service life or load-carrying capacity of balls, rollers or races are wear, fatigue and stress-induced welding. These problems are caused by the microscopically rough surfaces of these components, which deform slightly under wear and stress when pressure-induced welding occurs. It is these flat spots that reduce the performance of the lubricant and cause wear and damage to the rolling elements.