High Speed Deep Groove Ball Bearings

The basic design of high speed deep groove ball bearings is to have only one point of contact with the raceways, with the connection between them running through the radial plane. As a result, the pure radial load is the optimum direction of load for these bearings. There are several different series of deep groove ball bearings and their load carrying capacities depend on the specific series. For example, series 618 and 619 have smaller bearing cross-sections and cannot support the same loads as series 60, which has a much larger cross-section.

Timken publishes limiting speeds for high speed deep groove ball bearings

Timken publishes limiting speeds for its high-speed deep groove ball bearings for specific applications. Because these bearings are non-separable, mounting forces must be applied to the bearing ring in a tight fit. These bearings are precision machine elements, offering high operational security, but they must be treated with care to ensure optimal performance.

NTN oil lubrication

NTN offers a variety of high-speed deep groove ball bearings, from pre-lubricated bearings to sealed bearings. Their products are available in various greases, and the lubrication process can be customized to meet your specific needs.

Dimensions

A high speed deep groove ball bearing is a type of ball bearing that has a very deep groove and is lubricated with grease. These bearings are primarily used in electric vehicles and hybrid vehicles. They are compact and light in weight, and have a high rotational speed of over 30,000 rpm. High speed rotation has been a problem for conventional deep groove ball bearings, because they suffer from high temperatures and lack of lubrication.

Contact pressure

The contact pressure in high speed deep groove ball bearings is a function of the speed of the rotating shaft and its radial load. This force can change the contact angle between the raceways and balls. In order to minimize the force generated, the material used in the inner race is made of silicon nitride, which is a low density metal. Silicon nitride is very suitable for high temperature environments. However, it is prone to wear just like glass and bearing steel.

Minimum film thickness

The minimum film thickness of high speed deep groove ball bearings is the distance between the two surfaces that is influenced by the operating speed of the ball. This measurement can be difficult to perform, because the ball operating speed depends on both the inner race diameter and the rotational speed. A simple method to determine this minimum thickness is to multiply the inner race diameter by the DN, which is the inner race diameter times the rotational speed.