Ball Bearings Specifications

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Bearing Type


	Bearing Type:
	Your choices are...
	Radial Ball Bearing Courtesy of GlobalSpec, Inc.		Radial, or deep groove bearings, can take radial and axial loads to varying degrees but are used when the primary load is in the radial direction. They consist of an inner ring, an outer ring, balls and sometimes a cage to contain and separate the balls.
	Angular Contact Ball Bearing Courtesy of GlobalSpec, Inc.		Angular contact bearings are designed such that a contact angle between the races and the balls is formed when the bearing is in use. The major design characteristic of this type of bearing is that one or both of the ring races have one shoulder higher than the other. In order for these bearings to function properly, they must be assembled with a thrust load. This loading (or preload) creates a line of contact (or contact angle) between the inner race, the ball and the outer race. The preload can be built in to the bearing or created when the bearing is inserted into an assembly. The contact angle varies from 15° to 40° and is measured relative to a line running perpendicular to the bearing axis. Angular contact bearings are one-directional thrust bearings that can withstand heavy thrust loads and moderate radial loads.
	Mast Guide Bearing		Mast guide bearings are heavy-duty bearings designed for use in forklift applications.
	Thrust Bearing Courtesy of GlobalSpec, Inc.		Thrust ball bearings are designed for pure thrust loads. These bearings can handle little or no radial loads. The rolling element can be a ball, needle or roller.
	Other		Unlisted, unspecified, or proprietary configuration.
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Bore Size


	Bore Size		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


	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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Additional Specs


	Overall Width		Enter the overall width of the bearing or bearing assembly, including the locking collar (if present).
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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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	Dynamic Axial / Thrust Load		Dynamic axial (thrust) load is the calculated, constant, axial load which a group of identical bearings can endure theoretically for a rating life of one million revolutions of the inner ring.
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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.
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	Special Material / Plating Options
	Your choices are...
	Stainless Steel		Stainless steel is chemical and corrosion resistant and can have relatively high pressure ratings.
	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.
	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.
	Ceramic Races		Bearing races are constructed of ceramic (typically Si₃N₄^).
	Plated		Bearing is plated; common plating materials are cadmium and chrome.
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	Special Application
	Your choices are...
	Airframe / Aircraft Control		Aircraft control and airframe bearings are especially designed to meet the demands of aerospace applications. They can be of ball, roller or needle roller construction. Most aircraft control and airframe bearings are manufactured to U.S. government military (MIL-SPEC) standards.
	Aerospace		Bearings designed for aerospace applications such as jet engines and helicopters.
	Agriculture		Bearings designed for agriculture equipment and environments.
	Automotive		Bearings designed for the automotive industry.
	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.
	Instrument / Miniature		Instrument and miniature bearings are small deep groove or angular contact bearings. They are used in applications requiring very small bearings, such as dental drills and computer disk drives.
	Medical /Dental		Bearings specially designed for medical or dental equipment.
	Military		Bearing manufactured in accordance with the U.S. government standards, as dictated by the appropriate military specifications.
	Pump		These bearings are designed for the conditions found in pumps, including high loads, poor or degraded lubrication and high operating temperatures.
	Spindle / Super Precision		These are high precision bearings intended for use in machine tool spindles.
	Sporting and Consumer Goods		Bearings designed for the sporting and consumer goods market. Products in the sector include inline skates, skateboards and fishing reels.
	Other		Other, unlisted application.
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Bearing Class ANSI - American National Standards Institute AFBMA - Anti-friction Bearing Manufacturers Association ABEC - Annular Bearing Engineers Committee Refer to tables below for quality standards and cross reference to other standards organizations. Note: Stretch window to resize table(s).

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

Your choices are...

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.

Other

Other, unlisted quality rating.

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Tables:

Bearing Standard		Tolerance Class					Bearing Types
AFBMA ANSI	AFBMA/ANSI Std. 20	ABEC-1 RBEC-1	ABEC-3 RBEC-3	ABEC-5 RBEC-5	ABEC-7	ABEC-9	Radial bearings (except tapered roller bearings)
	AFBMA/ANSI Std. 19.1	Class K	Class N	Class C	Class B	Class A	Tapered roller bearings (Metric series)
	AFBMA B 3.19 ANSI Std. 19	Class 4	Class 2	Class 3	Class 0	Class 00	Tapered roller bearings (Inch series)
	AFBMA/ANSI Std. 12.1	--	Class 3P	Class 5P Class 5T	Class 7P Class 7T	Class 9P	Precision instrument ball bearings (Metric series)
	AFBMA/ANSI Std. 12.2	--	Class 3P	Class 5P Class 5T	Class 7P Class 7T	Class 9P	Precision instrument ball bearings (Inch series)
ISO	ISO 492	Normal class Class 6X	Class 6	Class 5	Class 4	Class 2	Radial bearings
	ISO 199	Normal class	Class 6	Class 5	Class 4	--	Thrust ball bearings
	ISO 578	Class 4	--	Class 3	Class 0	Class 00	Tapered roller bearings (Inch series)
	ISO 1224	--	--	Class 5A	Class 4A	--	Precision instrument bearings
JIS	JIS B 1514	Class 0 Class 6X	Class 6	Class 5	Class 4	Class 2	All types
DIN	DIN 620	P0	P6	P5	P4	P2	All types
AFBMA - Anti-friction Bearing Manufacturers Association (ABEC-Ball Bearings, RBEC-Roller Bearings) ANSI- American National Standards Institute ISO- International Organization for Standardization JIS- Japanese Industrial Standards DIN- Deutsch Industrie Norm

Standard ABEC Tolerances Inner Rings (all tolerances in micrometers)
Bearing Bore (mm)	*Bore Diameter +.00mm to**					Width Variation				Radial Runout					Side Runout with Bore				Raceway Runout with Side				Width Inner & Outer Rings
ABEC Rating	1	3	5	7	9	3	5	7	9	1	3	5	7	9	3	5	7	9	3	5	7	9	1-3-5-7	9
0 - 10	-3	-2	-2	-1.5	-1	3	2	1	.5	3	2	1.5	1	.5	3	3	1	.5	6	3	1	.5	-50	-10
10 - 18	-3	-2	-2	-1.5	-1	4	2	1	.5	4	3	1.5	1	.5	4	3	1	.5	6	3	1	.5	-50	-20

Standard ABEC Tolerances Outer Rings (all tolerances in micrometers)
Bearing O.D. (mm)	*Outside Diameter +.00mm to**					Width Variation				Radial Runout					Raceway Runout with Side				Outside Diameter Runout with Side
ABEC Rating	1	3	5	7	9	3	5	7	9	1	3	5	7	9	3	5	7	9	3	5	7	9
0 - 18	-4	-3	-2	-2	-1	4	2	1	.5	6	4	2	1.5	.5	8	3	2	.5	4	3	1.5	.5
18 - 30	-4	-3	-2	-2	-1.5	4	2	1	.5	6	4	2	1.5	1	8	3	2	1	4	3	1.5	.5

Ball Bearings Specifications

Bearing Type:

Bore Size:

Outside Diameter:

Overall Width:

Rated Speed (Oil):

Dynamic Axial / Thrust Load:

Dynamic Radial Load:

Special Material / Plating Options:

Special Application:

Bearing Class:

Help with Ball Bearings specifications: