Do you really understand deep groove ball bearings?
Deep groove ball bearings have 11 balls in the inner and outer rings. The inner ring rotates at 10 000 rpm. Operating temperature is 100 degrees Celsius. The radial load of the 11-ball deep groove ball bearing is 500 N. The surface roughness of the rollers and raceways is 0.01 mm. Calculating the RMS roughness of a deep groove ball bearing is easy if you have the given information.
Double row deep groove ball bearings
A double row deep groove ball bearing is a bearing with two rows of rolling elements. This design increases radial clearance and is ideal for high axial loads. Bearings of this type can also be shielded or open. These properties make double row ball bearings suitable for a wide range of applications.
In order to perform well, deep groove ball bearings must withstand sufficient radial loads. However, due to the weight of the supported components and external forces, the actual radial load is usually greater than necessary.
Double row deep groove ball bearings are grease lubricated to prevent contamination. The grease is based on mineral oil and is corrosion resistant. Grease fill levels are precisely measured so that the bearing remains lubricated throughout its service life. They are also usually maintenance-free.
Double row deep groove ball bearings are suitable for high speed applications. These bearings have low friction, resulting in lower operating temperatures. They also reduce noise and vibration. Their low friction also makes them suitable for high-rpm environments. They are also easy to replace if necessary.
Double row deep groove ball bearings have two rows of rolling elements and are suitable for axial and radial loads. They are also highly rigid and are often used in the front hubs of cars. Some cars also use double row tapered roller bearings in their front hubs.
Single row deep groove ball bearings
Single row deep groove ball bearings have a single row of deep grooves. The balls and the raceway grooves are separated by a narrow close fit, so that they can bear large axial loads. Axial load carrying capacity depends on bearing size, internal structure and working clearance. Excessive axial loads reduce bearing life and increase operating noise.
Single row deep groove ball bearings are self-retaining units and belong to the radial ball bearing series. Single row ball bearings have solid outer and inner rings and deep raceway grooves. They do not have fill grooves and therefore do not require grease or oil to ensure proper bearing performance. The outer and inner rings are usually sealed by polyamide 66 (PA66) rings, and the cage is made of pressed steel cage or sheet metal. Depending on the application, single row bearings are available in open and sealed versions with turned grooves.
Single row deep groove ball bearings feature high speed and low friction. This makes them ideal for portable and window air conditioners. Tolerances on the running and dimensional parts of the bearing are comparable to tolerance classes Normal and 6, but higher tolerances can be negotiated.
Single row deep groove ball bearings are the most commonly used bearing type worldwide. They are suitable for high speed and medium loads and require little maintenance. They are available as lithium-based greases for operating temperatures from -30°C to +110°C. They also offer advantages, including low cost and maintenance, higher load capacity, and smaller component and housing sizes.
Single row deep groove ball bearings are usually sealed. Sealed bearings prevent fluid leakage from the cavity. Additionally, they can withstand extreme temperatures and have a wide speed range. However, if lubrication is important, it is important to consider the maximum allowable speed of the bearing.