Deep Groove Ball Bearings:
Deep groove ball bearings are the most common type of rolling bearings. They mainly bear radial loads but can also withstand both radial and axial loads. When they only bear radial loads, the contact angle is zero. When deep groove ball bearings have a larger radial clearance, they have the performance of angular contact bearings and can withstand larger axial loads. Deep groove ball bearings have a very low friction coefficient and a high limit speed.
Angular Contact Ball Bearings:
There is a contact angle between the inner and outer rings, with three standard contact angles: 15/25 and 40 degrees. The larger the contact angle, the greater the axial load capacity, while the smaller the contact angle, the more favorable for high-speed rotation. Single-row bearings can withstand radial loads and unidirectional axial loads, DB combination, DF combination, and double-row angular contact ball bearings can withstand radial loads and bi-directional axial loads, and DT combination is suitable for cases where the unidirectional axial load is large and the rated load of a single bearing is insufficient. ACH type bearings are used for high-speed applications, with smaller ball diameters and more balls, mostly used in machine tool spindles. In general, angular contact ball bearings are suitable for high-speed and high-precision rotating applications.
In terms of structure:
Deep groove ball bearings and angular contact ball bearings with the same inner and outer diameter and width dimensions have the same inner ring size and structure, but the outer ring size and structure are different:
1. Deep groove ball bearings have double shoulders on both sides of the outer ring groove, while angular contact ball bearings generally have a single shoulder.
2. The curvature of the outer ring groove of deep groove ball bearings is different from that of angular contact ball bearings, with the latter often being larger than the former.
3. The position of the outer ring groove of deep groove ball bearings is different from that of angular contact ball bearings, which is not in the center. The specific value is determined when designing angular contact ball bearings and is related to the contact angle.
In terms of application:
1. The two have different uses. Deep groove ball bearings are suitable for bearing radial forces, smaller axial forces, combined radial and axial loads, and torque loads. Angular contact ball bearings can withstand single radial loads and larger axial loads (varying with the contact angle), and paired bearings (varying with the pairing method) can withstand bi-directional axial loads and torque loads.
2. The limit speeds are different. Angular contact ball bearings of the same size have higher limit speeds than deep groove ball bearings.
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