Help with Angular Contact Bearings specifications:
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Bearing Design: | |||
Your choices are... | |||
One Directional Thrust![]() |
Tolerates some misalignment. Same radial load as deep-groove bearings, but 2-3 times the thrust load. | ||
Double Direction Thrust | Double-direction angular contact thrust ball bearings are double-row bearings constructed with uniquely designed inner and outer rings. These bearings accommodate thrust loads from either direction. In contrast to other angular contact bearings they have steep contact angles, typically 60°. | ||
Double Row![]() |
Double-row angular contact ball bearings have two rows of balls in a single inner and outer ring. | ||
Double Row Maximum Capacity Angular | Double-row angular contact ball bearings have two rows of balls in a single inner and outer ring. These bearings are similar to double-row angular contact bearings, except that they are of the maximum capacity (filling slot) variety. The higher number of balls results in much higher load carrying capacity. | ||
Duplex Thrust | Two matching-ground, one-directional thrust bearings used as a set. They are typically used for two-directional thrust loads or very high one-directional thrust loads. Three duplex mounting arrangements are possible. | ||
Four Point Contact | Single-row angular contact bearings are designed so that the ball has four contact points, two with the outer race and two with the inner race. Four-point contact ball bearings carry radial and axial loads, as well as moment loads in a relatively small space. However, they are intended mainly for axial loads. | ||
Other | Unlisted, unspecified, or proprietary configuration. | ||
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Thin-section | Thin-section bearings have small cross-sections with respect to diameter. They are designed to save space, lower the weight of a design and reduce friction. Some thin-section bearings are also referred to as torque tube bearings. | ||
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Ball Screw Support | These bearings are specifically designed for use in ball screw or lead screw applications. Most ball screw support bearings are angular contact bearings with a steep contact angle, such as 60°, and are available in duplex, triplex and quadruplex configurations. Other designs include bearings containing separate thrust and radial roller bearings in a single assembly. Cartridge designs are also available that include a housing, seals and bearings. | ||
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Flanged | The bearing has a flange for mounting or locating. | ||
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Bore![]() |
The bearing industry uses a standard numbering system for bearings with metric-diameter bores. If the bore is hexagonal, enter the dimension across the flats. If the bore is tapered, enter the smaller diameter. For bore sizes 04 and up, multiply the bore size by 5 to identify the bore diameter in millimeters (mm). Refer to the table below. | ||||||||||||||||||||||||||||||||||||||||||||||
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Outside Diameter | Enter the outside diameter of the bearing. For housed bearings, include the housing. For flanged bearings, exclude the flange. | ||||||||||||||||||||||||||||||||||||||||||||||
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Outer Ring Width: | The width of the outer ring. | ||||||||||||||||||||||||||||||||||||||||||||||
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Tables: | |||||||||||||||||||||||||||||||||||||||||||||||
Bore Size (does not list all possible sizes) |
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Rated Speed (Oil) | The rated speed for a bearing with grease lubrication is lower than that of a bearing with oil lubrication. | ||
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Static Radial Load | Static radial load is the maximum radial load a bearing can endure without excessive, permanent deformation. | ||
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Dynamic Radial Load | Dynamic radial load is the calculated, constant, radial load which a group of identical bearings can endure theoretically for a rating life of one million revolutions of the inner ring. | ||
Search Logic: | User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria. | ||
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Bearing Class | Many organizations have developed standards, including the American Bearing Manufacturers Association (ABMA), International Organization for Standardization (ISO) and the Deutsches Institut für Normung (DIN). ABEC and RBEC standards are defined by ABMA Standard 20. Similar standards are defined by ISO 492, JIS B1514 and DIN 620. ABEC bearing ratings were established by the Annular Bearing Engineering Committee (ABEC) of the American Bearing Manufacturers Association (ABMA). There are five classes of bearings in the ABEC rating system - 1, 3, 5, 7, and 9. The higher the ABEC rating, the tighter the tolerances and the higher the bearing precision. ABEC 1 bearings are designed for use in lower speed and accuracy applications. RBEC bearing ratings were established by the Roller Bearing Engineering Committee (RBEC) of the American Bearing Manufacturers Association (ABMA). There are five classes of bearings in the RBEC rating system - 1, 3, 5, 7, and 9. The higher the RBEC rating, the tighter the tolerances and the higher the bearing precision. RBEC ratings apply to cylindrical roller and spherical roller bearings. RBEC 1 bearings are designed for use in lower speed and accuracy applications. Although the specifications may differ slightly, the following equivalency can be made between ABMA, ISO and DIN bearing classes. ANSI Standard 20 / ISO 492 / DIN 620 ABEC 1 / Class Normal / P0 ABEC 3 / Class 6 / P6 ABEC 5 / Class 5 / P5 ABEC 7 / Class 4 / P4 ABEC 9 / Class 2 / P2 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Unground Bearing | Unground bearings include bearings that are totally unground, partially unground and have precision levels less than ABEC 1. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
ABEC 1 / Class 0 / P0 | ABEC 1, Class 0 and P0 bearings are designed for use in lower speed and accuracy applications. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
ABEC 3 / Class 6 / P6 | ABEC 3, Class 6 and P6 bearings are designed for use in lower speed and accuracy applications. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
ABEC 5 / Class 5 / P5 | ABEC 5, Class 5 and P5 bearings are designed for use in higher speed and accuracy applications. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
ABEC 7 / Class 4 / P4 | ABEC 7, Class 4 and P4 bearings are designed for use in higher speed and accuracy applications. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
ABEC 9 / Class 2 / P2 | ABEC 9, Class 2 and P2 bearings are considered super precision and are designed for use in critical, high-tech applications. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Search Logic: | All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Stainless Steel | Stainless steel is chemical and corrosion resistant and can have relatively high pressure ratings. | ||
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Plastic | Any of numerous organic, synthetic or processed materials that are mostly thermoplastic or thermosetting polymers of high molecular weight and that can be made into objects, films, or filaments. | ||
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Ceramic Balls | A ceramic hybrid bearing is constructed of steel inner and outer rings with ceramic (typically Si3N4) balls in place of steel. These bearings have several advantages over all steel bearings, such as higher speed and acceleration capability, increased stiffness, higher accuracy, lower friction and heat generation, reduced lubrication requirements, low thermal expansion and extended operating life. Bearings containing all ceramic balls are also nonconductive and are commonly used in electric motor applications. | ||
Search Logic: | "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice. | ||
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Plated | Bearing is plated; common plating materials are cadmium and chrome. | ||
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Seals / Shielding: | Seals and shields provide protection from contamination and as a retainer for lubricant. Seals provide better protection and lubricant containment than shields, but have lower maximum speed capabilities. | ||
Your choices are... | |||
None (Open Bearing) | Bearing is open; it has no seals or shields. Open bearings offer no protection from contamination or lubricant containment, but have higher maximum speed capabilities than bearings with seals or shields. | ||
Single Seal![]() |
Bearing has one seal to prevent the ingress of dirt. | ||
Double Seal | Bearing has two seals to prevent the ingress of dirt. | ||
Single Shield![]() |
Bearing has one shield to prevent the ingress of dirt. | ||
Double Shield | Bearing has two shields to prevent the ingress of dirt. | ||
Search Logic: | All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||
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Relubricatable | This applies to sealed bearings only. Relubricatable bearings have provisions for relubricating the bearing (usually with grease) without removing the seals. | ||
Search Logic: | "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice. | ||
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Prelubricated | Bearing is prelubricated from the factory. Bearings with seals and shields usually are pre-lubricated with grease. | ||
Search Logic: | "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice. | ||
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Solid Lubrication | Solid lubricants can be used in a vacuum, in high and low temperature applications and where oil or grease may be unsuitable. Solid lubrication bearings feature excellent oil retention and long lubrication life. | ||
Search Logic: | "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice. | ||
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