ASTM F2332-06(2022)
(Specification)Standard Specification for Annular Ball Bearings for Instruments and Precision Rotating Components
Standard Specification for Annular Ball Bearings for Instruments and Precision Rotating Components
ABSTRACT
This specification covers annular ball bearings intended primarily for use in instrument and precision rotating components. Annular ball bearings for instrument and precision rotating components shall be of the following types, as specified: type I - deep groove, unflanged; type II - deep groove, flanged; type III - deep groove, unflanged, inner ring extended; type IV - deep groove, flanged, inner ring extended; type V - angular contact, unflanged, nonseparable, and counterbored outer ring; type VI - angular contact, flanged, nonseparable, and counterbored outer ring on flange side; type VII - angular contact, unflanged, separable, and stepped inner ring; type VIII - angular contact, flanged, separable, and stepped inner ring; type IX - angular contact, unflanged, nonseparable, and stepped inner ring. Materials inspection, passivation test, visual inspection, dimensional inspections, radial internal clearance, torque test, ball quality inspection, hardness test, surface roughness test, dimensional stability test, lubricant inspection, and calibration classification inspection shall be performed to meet the requirements prescribed.
SCOPE
1.1 This specification covers annular ball bearings intended primarily for use in instrument and precision rotating components. Instrument and precision ball bearings should meet tolerances specified in ABMA Standard 12.2, Instrument Ball Bearings Inch Design for Classes ABEC 5P and 7P.
1.2 Intended Use—Ball bearings defined by this specification are intended for use in critical components of instrument systems. Such components range from air circulating blowers and drive motors through precision gear trains, gyro gimbals, and pickoffs to rate integrating spin-motors.
1.3 The specification contains many of the requirements of MIL-B-81793, which was originally developed by the Department of Defense and maintained by the Naval Air Systems Command (Navy-AS) in Lakehurst, NJ. The following government activity codes may be found in the Department of Defense, Standardization Directory SD-1.2
Preparing activity
Custodians
Review activities
Navy - AS
Army - AT
Army-AV
Navy - AS
Navy - MC, SH
Air Force - 99
Air Force–84
DLA - GS
1.4 Classification—Annular ball bearings for instrument and precision rotating components shall be of the following types, as specified:
1.4.1 Type I—Annular ball bearing, for instruments and precision rotating components, deep groove, unflanged; (See Annex A1 – Annex A4)
1.4.2 Type II—Annular ball bearing, for instruments and precision rotating components, deep groove, flanged; (See Annex A5 – Annex A8)
1.4.3 Type III—Annular ball bearing, for instruments and precision rotating components, deep groove, unflanged, inner ring extended; (See Annex A9 – Annex A12)
1.4.4 Type IV—Annular ball bearing, for instruments and precision rotating components, deep groove, flanged, inner ring extended; (See Annex A13 – Annex A16)
1.4.5 Type V—Annular ball bearing, for instruments and precision rotating components, angular contact, unflanged, nonseparable, and counterbored outer ring; (See Annex A17 – Annex A20)
1.4.6 Type VI—Annular ball bearing, for instruments and precision rotating components, angular contact, flanged, nonseparable, and counterbored outer ring on flange side; (See Annex A21 – Annex A24)
1.4.7 Type VII—Annular ball bearing, for instruments and precision rotating components, angular contact, unflanged, separable, and stepped inner ring; (See Annex A25 – Annex A28)
1.4.8 Type VIII—Annular ball bearing, for instruments and precision rotating components, angular contact, flanged, separable, and stepped inner ring; (See Annex A29 – Annex A32)
1.4.9 Type IX—Annular ball bearing, for instruments and precision rotating components, angular contact, unflanged, nonseparable, and stepped inner ring. (See Annex A33 – Annex A36)
1.5 Inch-Pound Specification—This speci...
General Information
Relations
Standards Content (Sample)
This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation:F2332 −06 (Reapproved 2022)
Standard Specification for
Annular Ball Bearings for Instruments and Precision
Rotating Components
This standard is issued under the fixed designation F2332; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 1.4.4 Type IV—Annular ball bearing, for instruments and
precisionrotatingcomponents,deepgroove,flanged,innerring
1.1 This specification covers annular ball bearings intended
extended; (See Annex A13 – Annex A16)
primarily for use in instrument and precision rotating compo-
nents. Instrument and precision ball bearings should meet 1.4.5 Type V—Annular ball bearing, for instruments and
tolerances specified in ABMA Standard 12.2, Instrument Ball precision rotating components, angular contact, unflanged,
Bearings Inch Design for Classes ABEC 5P and 7P.
nonseparable, and counterbored outer ring; (See AnnexA17 –
Annex A20)
1.2 Intended Use—Ball bearings defined by this specifica-
tion are intended for use in critical components of instrument 1.4.6 Type VI—Annular ball bearing, for instruments and
systems. Such components range from air circulating blowers
precision rotating components, angular contact, flanged,
and drive motors through precision gear trains, gyro gimbals,
nonseparable, and counterbored outer ring on flange side; (See
and pickoffs to rate integrating spin-motors.
Annex A21 – Annex A24)
1.3 The specification contains many of the requirements of
1.4.7 Type VII—Annular ball bearing, for instruments and
MIL-B-81793, which was originally developed by the Depart-
precision rotating components, angular contact, unflanged,
ment of Defense and maintained by the Naval Air Systems
separable, and stepped inner ring; (See Annex A25 – Annex
Command (Navy-AS) in Lakehurst, NJ. The following gov-
A28)
ernment activity codes may be found in the Department of
1.4.8 Type VIII—Annular ball bearing, for instruments and
Defense, Standardization Directory SD-1.
precision rotating components, angular contact, flanged,
Preparing activity Custodians Review activities
separable, and stepped inner ring; (See Annex A29 – Annex
Navy - AS Army - AT Army-AV
A32)
Navy - AS Navy - MC, SH
Air Force - 99 Air Force–84
1.4.9 Type IX—Annular ball bearing, for instruments and
DLA - GS
precision rotating components, angular contact, unflanged,
1.4 Classification—Annular ball bearings for instrument
nonseparable,andsteppedinnerring.(SeeAnnexA33–Annex
and precision rotating components shall be of the following
A36)
types, as specified:
1.4.1 Type I—Annular ball bearing, for instruments and
1.5 Inch-Pound Specification—This specification covers
precision rotating components, deep groove, unflanged; (See
only the inch-pound bearings.
Annex A1 – Annex A4)
1.5.1 The values stated in inch-pound units are to be
1.4.2 Type II—Annular ball bearing, for instruments and
regarded as standard. No other units of measurement are
precision rotating components, deep groove, flanged; (See
included in this standard.
Annex A5 – Annex A8)
1.6 This standard does not purport to address all of the
1.4.3 Type III—Annular ball bearing, for instruments and
safety concerns, if any, associated with its use. It is the
precision rotating components, deep groove, unflanged, inner
ring extended; (See Annex A9 – Annex A12) responsibility of the user of this standard to establish appro-
priate safety, health, and environmental practices and deter-
1 mine the applicability of regulatory limitations prior to use.
ThisspecificationisunderthejurisdictionofASTMCommitteeF34onRolling
Element Bearings and is the direct responsibility of Subcommittee F34.06 on
1.7 This international standard was developed in accor-
Aerospace.
dance with internationally recognized principles on standard-
Current edition approved Jan. 1, 2022. Published August 2022. Originally
approved in 2006. Last previous edition approved in 2013 as F2332 - 06(2013). ization established in the Decision on Principles for the
DOI: 10.1520/F2332-06R22.
Development of International Standards, Guides and Recom-
The military codes that are listed in SD-1 give the address and phone numbers
mendations issued by the World Trade Organization Technical
of the DoD contacts. These are found in the DoD’s ASSIST website http://
assist.daps.dla.mil/. Barriers to Trade (TBT) Committee.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
F2332−06 (2022)
2. Referenced Documents 2.6 NCLS Standard:
3 Z540.1 Laboratories, Calibration, Measuring and Test
2.1 ASTM Standards:
Equipment
A240/A240MSpecification for Chromium and Chromium-
Nickel Stainless Steel Plate, Sheet, and Strip for Pressure 2.7 ISO Standards:
Vessels and for General Applications
ISO1224Bearings,Rolling—InstrumentPrecisionBearings
A313/A313MSpecification for Stainless Steel Spring Wire
ISO 3290Bearings, Rolling–Balls–Dimensions and Toler-
A380Practice for Cleaning, Descaling, and Passivation of
ances
Stainless Steel Parts, Equipment, and Systems
ISO 10012-1Quality Assurance Requirements for Measur-
A580/A580MSpecification for Stainless Steel Wire
ing Equipment
A666SpecificationforAnnealedorCold-WorkedAustenitic
ISO 14644-1Cleanrooms and Associated Controlled Envi-
Stainless Steel Sheet, Strip, Plate, and Flat Bar
ronments. Part 1: Classification of Air Cleaniness
A756Specification for StainlessAnti-Friction Bearing Steel
ISO 14644-2Cleanrooms and Associated Controlled Envi-
A967Specification for Chemical PassivationTreatments for
ronments. Part 2: Specifications for Testing and Monitor-
Stainless Steel Parts
ing to Provide Continued Compliance with ISO 14644-1
D2273Test Method for Trace Sediment in Lubricating Oils
2.8 Department of Defense:
E45Test Methods for Determining the Inclusion Content of
Specifications:
Steel
MIL-DTL-197Packaging of Bearings,Associated Parts and
E140Hardness Conversion Tables for Metals Relationship
Sub-Assemblies
Among Brinell Hardness, Vickers Hardness, Rockwell
MIL-PRF-6085Lubricating Oil, Instrument, Aircraft, Low
Hardness, Superficial Hardness, Knoop Hardness, Sclero-
Volatility
scope Hardness, and Leeb Hardness
4 MIL-PRF-23827Grease, Aircraft and Instrument, Gear and
2.2 ABMA Standards:
Actuator Screw, NATO Code G-354, Metric
STD 1Terminology for Anti-Friction Ball and Roller Bear-
MIL-DTL-53131Lubricating Oil, Precision Rolling Ele-
ings and Parts
ment Bearing, Polyalphaolefin Based
STD 10Metal Balls
MIL-S-81087Silicone Fluid, Chlorinated Phenyl Methyl
STD 12.2Instruments Ball Bearings—Inch Design
Polysiloxane, NATO Code Number H-536
2.3 SAE-AMS Specifications:
MIL-PRF-81322Grease, Aircraft, General Purpose, Wide
SAE-AMS 2303Aircraft Quality Steel Cleanliness, Marten-
Temperature Range
siticCorrosionResistantSteels,MagneticParticleInspec-
MIL-B-81744Barrier Coating Solution, Lubricant Migra-
tion Procedure
tion Deterring
SAE-AMS 5688Steel, Corrosion Resistant Wire, 18CR-
DOD-L-81846Lubricating Oil, Instrument, Ball Bearing,
9.0NI, (SAE 30302), Spring Temper
High Flash Point
SAE-AMS 5880Steel, Corrosion Resistant Bars, Wire and
MIL-G-81937Grease, Instrument, Ultra Clean, Metric
Forgings, 17CR-0.52MO (0.95-1.2C)
MIL-PRF-83261 Grease, Aircraft, Extreme Pressure,
SAE-AMS 6444Steel Bars, Forgings, and Mechanical
Anti-Wear
Tubing, 1.45 Cr (0.98-1.10C) (SAE 52100) Premium
Standards:
Aircraft Quality Consumable Electrode Vacuum Melted
MIL-STD-129Military Marking
SAE-AMS-QQ-S-763 Steel Bars, Wire, Shapes, and
MIL-STD-130IdentificationMarkingofU.S.MilitaryProp-
Forgings, Corrosion Resistant
erty
2.4 ASME Standards:
MIL-STD-206Friction Torque Testing for Bearings, Ball,
B46.1Surface Texture (Surface Roughness, Waviness and
Annular (Instrument Type)
Lay)
MIL-STD-1334Process for Barrier Coating ofAnti-Friction
B89.3.1Measurement of Out of Roundness
7 Bearings
2.5 ASQC Standards:
MIL-STD-1647Identification Markings for Domestically
Z1.4Sampling Procedures and Tables for Inspection by
ManufacturedBearings,Ball,AnnularforInstrumentsand
Attributes
Precision Components
2.9 Federal Standards:
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
FED-STD-791 Lubricants, Liquid Fuel and Related
contactASTM Customer Service at service@astm.org. ForAnnual Book ofASTM
Products, Methods of Testing
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
Available from American Bearing Manufacturers Association 1001 N. Fairfax
Street Suite 500 Alexandria, VA 22314-1587. https://www.americanbearings.org/
5 8
AvailablefromSAEInternational(SAE),400CommonwealthDr.,Warrendale, Available from NCSL International 5766 Central Ave, Suite 150 Boulder, CO
PA 15096, http://www.sae.org. 80301. https://ncsli.org/
6 9
Available from American Society of Mechanical Engineers (ASME), ASME Available from International Organization for Standardization (ISO), ISO
International Headquarters, Two Park Ave., New York, NY 10016-5990, http:// Central Secretariat, Chemin de Blandonnet 8, CP 401, 1214 Vernier, Geneva,
www.asme.org. Switzerland, https://www.iso.org.
7 10
Available from American Society for Quality (ASQ), 600 North Plankinton Available from DLA Document Services, Building 4/D, 700 Robbins Ave.,
Avenue Milwaukee, WI 53203 https://asq.org/. Philadelphia, PA 19111-5094, http://quicksearch.dla.mil.
F2332−06 (2022)
3. Performance Requirements vided they withstand service vibration conditions without
becoming detached. Reinstallation does not apply to synthetic
3.1 Annexes—The individual item requirements shall be as
rubber seals.
specified herein and in accordance with the applicable annex.
3.5 Visual Requirements:
In the event of any conflict between the requirements of this
3.5.1 Surface Appearance—Cylindrical mounting surfaces,
specification and the annexes, the latter shall govern.
cage piloting lands, and faces of inner and outer rings shall
3.2 Materials:
have a smooth finished appearance characteristic of one or
3.2.1 Ball and Ring Materials—Balls and rings shall be
more of the following processes: grinding, honing, lapping,
made of corrosion-resistant steel, 440C (UNS S44004), con-
polishing,ortumbling.Thesurfacesshallbefreeofvisibletool
forming to SAE-AMS 5880 or A756; chromium-alloy steel
marks, chatter and waviness, scratches with raised metal, pits,
52100 (UNS G52986) conforming to SAE-AMS 6444 as
rust,orothersurfaceimperfections.Metalretainers,snaprings,
specified by the applicable annexes. (A single material is
and closures shall have a smooth finished appearance charac-
represented by each annex.) teristic of a tumbling process and shall be free of burrs, dents,
and folded material. Machined nonmetallic retainers shall be
3.2.1.1 Material Cleanliness/Inclusion Content—440C
free of delaminations and shall be deburred.
corrosion-resistant steels used for production of bearings shall
3.5.2 Cracks and Fractures—Rings, balls, retainers, snap
meet the cleanliness requirements of SAE-AMS 5880.
rings, and closures shall be free of cracks and fractures.
Chromium-alloysteelusedfortheproductionofbearingsshall
3.5.3 Material Imperfections—Nonmetallic retainers shall
meet the cleanliness requirements of SAE-AMS 6444.
have no material imperfections, such as chipping and pits, in
3.2.1.2 Passivation—Passivation shall be accomplished in
ball contact areas, and material imperfections in other areas
accordance with A380 and A967 on all bearing components
shall not exceed 0.015-in. (0.038-cm) major dimension.
fabricatedfromcorrosion-resistantsteelaftercompletionofall
3.5.4 Particulate Contamination—All exterior surfaces and
machining or metal-removing operations and before assembly.
interior areas of the bearing shall be free of foreign particles
3.2.2 Retainer Metal—When corrosion-resistant steel is
visible using 10× magnification.
specified, crown retainers shall be UNS S41000 and ribbon
3.6 Dimensions:
retainers shall be either UNS S30200, UNS S30500, or UNS
3.6.1 Boundary Dimensions—The boundary dimensions for
S43000 in accordance with A240/A240M or A666. Configu-
each specification sheet shall be in accordance with the
rationshallbeasspecifiedbythepartnumberdesignatorinthe
Boundary Dimensions table of that annex.
Retainer table of the annexes.
3.6.2 Tolerance Class—Tolerance classes for ABEC 5P or
3.2.3 Shield Material—Shield material shall be corrosion-
7P shall be in accordance with the tolerance tables of ABMA
resistant steel conforming to A580/A580M, Condition A,
Standard 12.2. The tolerance classes shall apply to all bearing
A240/A240M,or A666.
sizes listed in the Boundary Dimensions tables of the annexes.
3.2.4 Snap Ring Material—Snap ring material shall be
3.6.3 Roundness—Raceways shall be round within the val-
corrosion-resistant steel conforming to A313/A313M, Type
uesspecifiedinTable1whenmeasuredbytheminimumradial
302, Class 1 or SAE-AMS 5688.
separation (MRS) method. This method consists of construct-
3.2.5 Seal Material—Seal materials shall be as specified by
ing two concentric circles, which fully encompasses the polar
the part number designator in the Closures tables of the
traceofthemeasuredsurfaceandhavetheleastpossibleradial
annexes. Materials shall be compatible with and shall be
separation. This radial separation is the measurement of out of
resistant to deterioration caused by lubricant, preservative,
roundness.
hydraulic fluid, solvents, or other substances and chemicals
3.6.4 Radial Internal Clearance—Radial internal clearance
that can be expected to come into contact with the bearing and
(radial play) of deep groove radial bearings shall be as
shall cause no deterioration of the same. Seal materials shall
specified by the part number designator in the Radial Internal
not affect or be affected by the lubricants and solvents referred
Clearance tables of the annexes.
to in this specification. Synthetic rubber seals shall operate
3.6.5 Contact Angle—The contact angle or radial internal
from −65 to 230°F (−54 to 110°C).
clearance of angular contact bearings shall be as specified by
the part number designator in the Radial Internal Clearance
3.3 Design and Construction—Bearings shall be of the
tables of the annexes and reflects the unit of the appropriate
design, construction, and physical dimensions specified on the
method of measurement. The contact angle shall be as defined
applicable annex (see 3.1).
by ABMA Standard 1. A bearing offered with a
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.