Choose bearings made of materials coated with zinc or tin. Also, wear gloves when installing bearings. If there is direct contact with the bearings by hand, remember to apply rust preventive oil after installation. If you want to completely avoid rust, you can also choose stainless steel or ceramic bearing materials.

The selection of proper bearing clearance is critical as it directly impacts the function and longevity of the bearing. ISO standards have defined five clearance classes for various types of bearings, which are as follows:

• C2: Smaller than normal clearance
• C0: Normal clearance
• C3: Greater than normal clearance
• C4: Greater than C3 clearance
• C5: Greater than C4 clearance

Bearing accuracy levels are denoted as P0, P6, P5, P4, and P2, ranging from low to high precision. Here's a breakdown of these accuracy levels:

• P0: Applicable for rotational precision greater than 10 μm in bearing systems such as the speed-changing mechanism of ordinary machine tools, feed mechanism, speed-changing mechanism of automobiles, tractors, and other commonly used machinery.
• P6: Suitable for precision within 5-10 μm in bearing systems with rotational speeds of m or higher, such as the front support of an ordinary lathe using level 5 and the rear support using level 6.
• P4: Ideal for precision less than 5 μm in ultra-precision machinery with high rotational speeds, including precision coordinate boring machines, gear systems of precision grinding machines, and other precision machinery.

Bearing accuracy levels are denoted as P0, P6, P5, P4, and P2, ranging from low to high precision. Here's a breakdown of these accuracy levels:

• Understand the load requirements of bearings in your industry.
• Determine the rotational speed requirements for bearings in your industry.
• Identify the lubrication method suitable for your bearing needs.

Bearing load is typically defined as the reactive force exerted on the bearing by the components during use. When selecting the appropriate bearing for your application, it is crucial to first determine the bearing's load capacity.

Rolling bearings employ a cylindrical roller design, which, compared to ball bearings, allows for the distribution of loads over a larger surface area. They are often more suitable for heavy-load applications.

Bearings support various load combinations, but most types of application loads can be categorized into the following four main groups:

• Radial Loads
• Axial Loads
• Preloads
• Centrifugal Loads

Radial load in bearings refers to the force perpendicular to the axis of the shaft and parallel to the bearing radius.

Axial load in bearings is the force acting along the axis of the shaft, sometimes referred to as thrust load. Axial loads distribute forces equally and uniformly to the rolling elements, transmitting them from the inner to the outer ring of the bearing.

• Radial loads (load perpendicular to the shaft): Choose standard cylindrical roller bearings.
• Axial loads (load parallel to the shaft): Choose cylindrical thrust bearings.
• Combined radial and axial loads: Choose tapered roller bearings.

Lubrication forms a layer of oil film between the rolling elements and the bearing raceways, helping to prevent friction and overheating. Understanding the lubrication requirements of your industry is crucial for selecting the appropriate bearings, as improper lubrication is one of the most common causes of bearing failure.

Applying lubricants between the rolling and sliding parts of bearings helps increase speed and prolong lifespan. Other benefits of lubrication include:

• Reduction of noise and vibration
• Heat dissipation
• Sealing
• Corrosion protection
• Long-term maintenance-free operation

In industrial bearings, the most common lubrication methods are:

• Oil lubricants
• Grease lubricants

*****: very good
*: poor

Rolling bearings are mechanical components designed to reduce friction between moving parts and facilitate smooth motion in machinery. Unlike sliding bearings, rolling bearings use cylindrical, needle, or tapered rollers to carry and distribute loads. This rolling action minimizes friction, heat, and wear, making rolling bearings crucial for efficient operation across various industrial applications.

Cylindrical roller bearings offer outstanding performance, reliability, and longer lifespan. Theis bearing is tailored to meet the rigorous demands of heavy-duty applications, ensuring efficient machine operation and reducing downtime.

Bearings should not be exposed to water for extended periods, as this can lead to rust and corrosion. It can also cause premature bearing failure, affecting machine performance and productivity. Additionally, gloves should be worn when handling bearings, as sweat can also cause rust and corrosion.

Load ratings may vary between different manufacturers, but there isn't necessarily a true difference; it's just that different methods are used to calculate the load ratings. Some manufacturers use ABMA standards, some use ANSI standards, and some use equivalent dynamic load calculations. Generally, if the internal design is the same, the load ratings will be equivalent.

Corrosion-resistant bearings can be used in applications where corrosive materials are present and standard bearings cannot meet the requirements, such as food processing, chemical manufacturing, pharmaceutical production, and marine applications.

Thin section bearings are bearings with reduced clearances between the inner and outer rings. Thin section ball bearings are developed specifically for applications with limited space, including those in instrumentation, robotics, medical devices, aerospace, and optical equipment.

Bearings are commonly used in various parts of a bicycle, including:

• Front and rear wheel hubs
• Bottom bracket
• Headset, where the handlebars rotate
• Pedals
• Freewheel