Thin-section Bearings Specifications

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Dimensions

Design Units:

Unit designation for O.D., I.D., etc.

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Inch

Units are inches or fractions of an inch.

Metric

Units such as millimeters or centimeters.

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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)

Bore Size	Dimension (mm)
00	10mm
01	12mm
02	15mm
03	17mm
04	20mm
05	25mm
06	30mm
07	35mm
08	40mm
09	45mm
10	50mm
11	55mm
12	60mm
13	65mm
14	70mm
15	75mm
16	80mm
17	85mm
18	90mm
19	95mm
20	100mm

Operating Specifications Do not over-specify. Enter only those loads that apply for bearing type and application. Static and dynamic loads may not be available for all bearing types and suppliers.


	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.
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Bearing Design


	Bearing Design:
	Your choices are...
	Conrad / Deep Groove Courtesy of Timken Super Precision		The balls rotate in a deep groove machined into the inner and outer races. A cage maintains ball clearance and complement. This type of bearing exhibits a good radial load capacity, a fair axial load capacity and a fair capability to resist misalignment.
	Double Row Deep Groove Courtesy of CCTY Bearing		This bearing style is a modified version of the single-row deep groove ball bearing with the addition of a second row of balls. This design increases its ability to carry radial and thrust loads. Though using the same radial mounting space as the single-row style, its increased width limits the ability of this bearing to accommodate misalignment.
	One Directional Thrust Courtesy of Timken Super Precision		Tolerates some misalignment. Same radial load as deep-groove bearings, but 2-3 times the thrust load.
	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.
	Single-Row Tapered Courtesy of CCTY Bearing		Tapered roller bearings consist of an inner ring (cone), an outer ring (cup), a cage and rollers which are profiled to distribute the load evenly across the roller. They have high radial and axial (thrust) load capacity at low to intermediate speeds. The thrust load capacity for single-row tapered bearings is about 60% of the radial capacity.
	Cylindrical Courtesy of CCTY Bearing		Cylindrical roller bearings have high radial load capacity and moderate thrust loads. They contain rollers that are cylindrical in shape. The rollers are not true cylinders; they are crowned or end relieved to reduce stress concentrations. This geometry translates to low friction and high-speed applications. Cylindrical roller bearings are commonly available in precision grades (RBEC-5). Lubrication for cylindrical roller bearings is usually oil, which also serves as a coolant.
	Crossed		Cross roller bearings consist of rollers with an axis of rotation that is alternately crossed between a split outer ring and an inner ring. These bearings are capable of handling complicated loads (radial, thrust and moment loads).
	Other		Unlisted, unspecified, or proprietary configuration.
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Bearing Class ANSI: American National Standards Institute AFBMA: Anti-Friction Bearing Manufacturers Association ABEC: Annular Bearing Engineers Committee RBEC: Roller 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

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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 / RBEC 1 / Class 0 / P0

ABEC 1, RBEC 1, Class 0 and P0 bearings are designed for use in lower speed and accuracy applications.

ABEC 3 / RBEC 3 / Class 6 / P6

ABEC 3, RBEC 3, Class 6 and P6 bearings are designed for use in lower speed and accuracy applications.

ABEC 5 / RBEC 5 / Class 5 / P5

ABEC 5, RBEC 5, Class 5 and P5 bearings are designed for use in higher speed and accuracy applications.

ABEC 7 / RBEC 7 / Class 4 / P4

ABEC 7, RBEC 7, Class 4 and P4 bearings are designed for use in higher speed and accuracy applications.

ABEC 9 / RBEC 9 / Class 2 / P2

ABEC 9, RBEC 9, Class 2 and P2 bearings are considered super precision and are designed for use in critical, high-tech applications.

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Tapered Roller Bearing Class

Tapered roller bearing precision and accuracy standards determine bearing tolerances. 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 Standards 19.1 (metric series) and 19.2 (inch series). Similar standards are defined by ANSI B3.19, ISO 578, JIS B1514 and DIN 620.

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Class 4 / Class K / P0

The lowest quality class is Class 4 (ABMA), Class K (ISO) and P0 (DIN). These bearings are considered standard quality and are intended for slower speed and lower accuracy applications.

Class 2 / Class N / P6

Class 2 (ABMA). Class N (ISO) and Class P6 (DIN) is the next higher class above Class 4 / Class K / P0, having slightly tighter tolerances. They are considered standard quality and intended for lower speed and accuracy applications.

Class 3 / Class C / P5

Class 3 (ABMA), Class C (ISO) and Class P5 (DIN) bearings are the lowest class of precision grade tapered roller bearings. These bearings are designed for higher speed and accuracy applications than standard class bearings.

Class 0 / Class B / P4

Class 0 (ABMA), Class B (ISO) and Class P4 (DIN) bearings are precision grade tapered roller bearings designed for higher speed and accuracy applications than standard class bearings.

Class 00 / Class A / P2

Class 00 (ABMA), Class A (ISO) and Class P2 (DIN) bearings are precision grade tapered roller bearings designed for higher speed and accuracy applications than standard class bearings.

Class 000 / Class AA

Class 000 (ABMA) and Class AA (ISO) bearings are the highest precision grade tapered roller bearings designed for use in critical, high-tech applications.

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Other

Other, unlisted quality rating.

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Tables:

Bearing Standard		Tolerance Class					Bearing Types
ABMA ANSI	ABMA/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)
	ABMA/ANSI Std. 19.1	Class K	Class N	Class C	Class B	Class A	Tapered roller bearings (Metric series)
	ANS B3.19 ABMA Std. 19	Class 4	Class 2	Class 3	Class 0	Class 00	Tapered roller bearings (Inch series)
	ABMA/ANSI Std. 12.1	--	Class 3P	Class 5P Class 5T	Class 7P Class 7T	Class 9P	Precision instrument ball bearings (Metric series)
	ABMA/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
ABMA - American 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

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

Special Material / Plating Options


	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.
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	Plated		Bearing is plated; common plating materials are cadmium and chrome.
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Seals / Shielding


	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.
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Thin-section Bearings Specifications

Design Units:

Bore:

Outside Diameter:

Outer Ring Width:

Rated Speed (Oil):

Static Radial Load:

Dynamic Radial Load:

Bearing Design:

Bearing Class:

Other?

Stainless Steel?

Plastic?

Ceramic Balls?

Plated?

Seals / Shielding:

Help with Thin-section Bearings specifications: