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Roller Bearing Type:
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Your choices are...
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Cylindrical Courtesy of CCVI Bearing Company
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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 allows for 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.
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Crossed
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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).
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Single-Row Tapered Courtesy of CCVI Bearing Company
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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.
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Two-Row Tapered
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Two-row or double-row tapered roller bearings have increased radial load capacity compared to single-row bearings. They can also handle thrust loads from both directions. The rollers can be configured in a converging or a diverging orientation. In converging double-row tapered bearings, the contact lines of the rollers to the races converge towards the axis of the bearing rotation. This style does not appreciably increase the rigidity of the shaft mounting. In diverging double-row tapered bearings, the contact lines of the rollers to the races diverge towards the axis of the bearing rotation. This style increases the rigidity of the shaft mounting. Different configurations are also available with a single outer ring and two inner rings or two outer rings and a single inner ring.
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Four-Row Tapered
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Four-row tapered bearings consist of four rows of alternating, converging and diverging rollers.
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Spherical Courtesy of CCVI Bearing Company
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Spherical roller bearings are self-aligning, double- row, combination, radial and thrust bearings. The rolling element is a spherical, or crowned, roller. The outer ring has a spherical race that allows for some misalignment of the shaft and housing. They are unequalled in their capacity for high loads and tolerance to shock loads, but have limited speed capabilities.
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Spacer Assembly
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Spacer bearings are two single row bearings purchased as a matched set. These bearings can be assembled together with the addition of spacers between the inner rings, the outer rings, or both the inner and outer rings.
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Cylindrical Roller Thrust
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Cylindrical roller thrust bearings consist of a roller and cage assembly. They can be assembled against hardened flat surfaces or with hardened thrust washers. They tolerate much higher loads than thrust needle roller assemblies.
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Spherical Roller Thrust
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Spherical roller thrust bearings have a spherical raceway in the outer ring. The rollers are arranged diagonally in single row. Spherical roller bearings have a high axial load capacity and can take moderate radial loads (when an axial load is applied). Due to the nature of the spherical rollers, they can handle some misalignment.
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Hollow Roller
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Hollow roller bearings are single-row or double-row radial bearings with an inner ring, an outer ring and hollow or thin-wall rollers. The thin wall in the rollers allows these bearings to be preloaded, as opposed to cylindrical roller bearings with solid rollers. This increases radial stiffness and reduces radial vibration and radial runout. Proper lubrication is critical for proper operation and bearing life. These bearings are used on turbine shafts as well as grinding, milling, and workhead spindles where precision and stiffness are a requirement.
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Slewing Ring / Turntable Bearing
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These bearings can accommodate axial, radial and moment loads. They are not mounted in a housing or on a shaft, but instead are mounted directly to a seating surface. The inner and outer rings are supplied with mounting holes. The inner ring, outer ring, or both may have integral gears. These bearings are referred to as tabletop bearings, turntable bearings, and slewing rings.
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Combined Roller (with Stub Axle)
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Bearing is a combination of a radial bearing and an axial bearing. A stub axle holds both the radial and axial bearing in a combined bearing in place and provides an easy welding point.
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Other
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Unlisted, unspecified, or proprietary configuration.
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Search Logic:
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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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Split Bearing
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Bearing and housing are completely split to the shaft for easy bearing replacement and inspection.
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Search Logic:
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"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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Thin-section
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Thin-section bearings have small cross-sections with respect to their 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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Search Logic:
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"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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Bore
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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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Search Logic:
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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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Tables:
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Bore Size (does not list all possible sizes)
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| 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 |
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Outside Diameter
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Enter the outside diameter of the bearing. For housed bearings, include the housing. For flanged bearings, exclude the flange.
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Search Logic:
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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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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).
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RBEC Rating:Courtesy of CCVI Bearing Company
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RBEC (Roller Bearing Engineers' Committee) ratings classify different accuracy and tolerance ranges for bearings. The higher the RBEC number the tighter the bearing tolerances.
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Search Logic:
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All matching products will have a value greater than or equal to the specified value.
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Tapered Roller Bearing Class:Courtesy of CCVI Bearing Company
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The ANSI bearing class for tapered roller bearings that indicate the bearing tolerance. Classes 4, 2, 3, 0 and 00 are for inch-series bearings. Classes K, N, C, B, and A are for metric-series bearings.
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Search Logic:
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All matching products will have a value greater than or equal to the specified value.
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Tables:
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| 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 |
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| 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 |
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| 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 |
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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.
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Overall Width
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Enter the overall width of the bearing or bearing assembly, including the locking collar (if present).
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Search Logic:
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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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Rated Speed (Oil)
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The rated speed for a bearing with grease lubrication is lower than that of a bearing with oil lubrication.
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Search Logic:
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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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Static Axial / Thrust Load
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Static axial (thrust) load is the maximum axial load a bearing can endure without excessive, permanent deformation.
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Search Logic:
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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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Static Radial Load
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Static radial load is the maximum radial load a bearing can endure without excessive, permanent deformation.
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Search Logic:
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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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Dynamic Axial / Thrust Load
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Dynamic axial (thrust) load is the calculated, constant, axial load which a group of identical bearings can endure theoretically for a rating life of 1 million revolutions of the inner ring.
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Search Logic:
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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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Dynamic Radial Load
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Dynamic radial load is the calculated, constant, radial load which a group of identical bearings can endure theoretically for a rating life of 1 million revolutions of the inner ring.
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Search Logic:
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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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Features
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Your choices are...
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Flanged
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The bearing has a flange for mounting or locating.
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Spherical Outside Diameter
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The bearing is tolerant of misalignment and has a greater load capacity than internal self-alignment, but requires more radial space.
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Search Logic:
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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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