ASTM F2730/F2730M-18
(Specification)Standard Specification for Silicon Nitride Cylindrical Bearing Rollers
Standard Specification for Silicon Nitride Cylindrical Bearing Rollers
SCOPE
1.1 This specification covers the establishment of the basic quality, physical/mechanical property, and test requirements for silicon nitride rollers Classes I, II, and III to be used for cylindrical roller bearings.
1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. Combining values from the two systems may result in nonconformance with the specification.
1.3 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.
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Designation:F2730/F2730M −18
Standard Specification for
1
Silicon Nitride Cylindrical Bearing Rollers
ThisstandardisissuedunderthefixeddesignationF2730/F2730M;thenumberimmediatelyfollowingthedesignationindicatestheyear
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.
3
1. Scope 2.3 ASME Standard:
B 46.1Surface Texture (Surface Roughness, Waviness, and
1.1 This specification covers the establishment of the basic
Lay)
quality, physical/mechanical property, and test requirements
4
2.4 JIS Standards:
for silicon nitride rollers Classes I, II, and III to be used for
R 1601Testing Method for Flexural Strength (Modulus of
cylindrical roller bearings.
Rupture) of High Performance Ceramics
R 1607Testing Method for Fracture Toughness of High
1.2 The values stated in either SI units or inch-pound units
Performance Ceramics
are to be regarded separately as standard. The values stated in
5
2.5 CEN Standards:
each system are not exact equivalents; therefore, each system
EN 843-1 Advanced Technical Ceramics—Monolithic
must be used independently of the other. Combining values
Ceramics—Mechanical Properties at Room Temperature,
from the two systems may result in nonconformance with the
Part 1, Determination of Flexural Strength
specification.
ENV 843-5 Advanced Technical Ceramics—Monolithic
1.3 This international standard was developed in accor-
Ceramics—Mechanical Properties at Room Temperature,
dance with internationally recognized principles on standard-
Part 5, Statistical Analysis
6
ization established in the Decision on Principles for the
2.6 ISO Standard:
Development of International Standards, Guides and Recom- Hardmetals-Metallographic determination of porosity and
mendations issued by the World Trade Organization Technical uncombined carbon
Barriers to Trade (TBT) Committee.
3. Terminology
2. Referenced Documents 3.1 Definitions of Terms Specific to This Standard:
3.1.1 ceramic second phase, n—sintering additive based
2.1 Order of Precedence:
phases,forexampleyttriaandalumina,whichappeardarkeror
2.1.1 In the event of a conflict between the text of this
lighter than the silicon nitride matrix but are not highly
document and the references herein, the text of this document
reflective in nature when viewed under reflected light micros-
takes precedence. Nothing in this document, however, super-
copy and bright field illumination.
sedes applicable laws and regulations unless a specific exemp-
3.1.2 chips, n—break-outs of material greater in extent than
tion has been obtained.
0.25 mm [0.1 in.] typically at the corner chamfers or the
2
junction of the chamfers with the cylindrical surface or end
2.2 ASTM Standards:
face.
C1161Test Method for Flexural Strength of Advanced
3.1.3 color variation, n—an area that appears lighter or
Ceramics at Ambient Temperature
darker than the surrounding area under reflected light micros-
C1421Test Methods for Determination of Fracture Tough-
copy but with no discernible physical discontinuity associated
ness of Advanced Ceramics at Ambient Temperature
with it.
1 3
ThisspecificationisunderthejurisdictionofASTMCommitteeF34onRolling Available from American Society of Mechanical Engineers (ASME), ASME
Element Bearings and is the direct responsibility of Subcommittee F34.01 on International Headquarters, Two Park Ave., New York, NY 10016-5990, http://
Rolling Element. www.asme.org.
4
Current edition approved April 1, 2018. Published July 2018. Originally Available from Japanese Standards Organization (JSA), 4-1-24 Akasaka
approved in 2008. Last previous edition approved in 2014 as F2708/F2708M–14. Minato-Ku, Tokyo, 107-8440, Japan, http://www.jsa.or.jp.
5
DOI: 10.1520/F2730_F2730M-18. Available from European Committee for Standardization (CEN), 36 rue de
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or Stassart, B-1050, Brussels, Belgium, http://www.cenorm.be.
6
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Available from International Organization for Standardization (ISO), ISO
Standards volume information, refer to the standard’s Document Summary page on Central Secretariat, BIBC II, Chemin de Blandonnet 8, CP 401, 1214 Vernier,
the ASTM website. Geneva, Switzerland, http://www.iso.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
F2730/F2730M−18
3.1.3.1 Discussion—Color variation is often not visible 3.1.13 metallic smears, n—metallic material from machin-
under scanning electron microscopy (SEM) examination. ingormeasuringequipmenttransferredontotherollersurface.
3.1.4 cracks, n
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: F2730/F2730M − 14 F2730/F2730M − 18
Standard Specification for
1
Silicon Nitride Cylindrical Bearing Rollers
This standard is issued under the fixed designation F2730/F2730M; the number immediately following the designation indicates the year
of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval.
A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 This specification covers the establishment of the basic quality, physical/mechanical property, and test requirements for
silicon nitride rollers Classes I, II, and III to be used for cylindrical roller bearings.
1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each
system are not exact equivalents; therefore, each system must be used independently of the other. Combining values from the two
systems may result in nonconformance with the specification.
1.3 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.
2. Referenced Documents
2.1 Order of Precedence:
2.1.1 In the event of a conflict between the text of this document and the references herein, the text of this document takes
precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been
obtained.
2
2.2 ASTM Standards:
C1161 Test Method for Flexural Strength of Advanced Ceramics at Ambient Temperature
C1421 Test Methods for Determination of Fracture Toughness of Advanced Ceramics at Ambient Temperature
3
2.3 ASME Standard:
B 46.1 Surface Texture (Surface Roughness, Waviness, and Lay)
4
2.4 JIS Standards:
R 1601 Testing Method for Flexural Strength (Modulus of Rupture) of High Performance Ceramics
R 1607 Testing Method for Fracture Toughness of High Performance Ceramics
5
2.5 CEN Standards:
EN 843-1 Advanced Technical Ceramics—Monolithic Ceramics—Mechanical Properties at Room Temperature, Part 1,
Determination of Flexural Strength
ENV 843-5 Advanced Technical Ceramics—Monolithic Ceramics—Mechanical Properties at Room Temperature, Part 5,
Statistical Analysis
6
2.6 ISO Standard:
Hardmetals-Metallographic determination of porosity and uncombined carbon
3. Terminology
3.1 Definitions of Terms Specific to This Standard:
1
This specification is under the jurisdiction of ASTM Committee F34 on Rolling Element Bearings and is the direct responsibility of Subcommittee F34.01 on Rolling
Element.
Current edition approved March 15, 2014April 1, 2018. Published March 2014July 2018. Originally approved in 2008. Last previous edition approved in 20132014 as
F2708/F2708M–13.–14. DOI: 10.1520/F2730_F2730M-14.10.1520/F2730_F2730M-18.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Available from American Society of Mechanical Engineers (ASME), ASME International Headquarters, ThreeTwo Park Ave., New York, NY 10016-5990,
http://www.asme.org.
4
Available from Japanese Standards Organization (JSA), 4-1-24 Akasaka Minato-Ku, Tokyo, 107-8440, Japan, http://www.jsa.or.jp.
5
Available from European Committee for Standardization (CEN), 36 rue de Stassart, B-1050, Brussels, Belgium, http://www.cenorm.be.
6
Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http://www.ansi.org.International Organization for
Standardization (ISO), ISO Central Secretariat, BIBC II, Chemin de Blandonnet 8, CP 401, 1214 Vernier, Geneva, Switzerland, http://www.iso.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
F2730/F2730M − 18
3.1.1 ceramic second phase, n—sintering additive based phases, for example yttria and alumina, which appear darker or lighter
than the silicon nitride matrix but are not highly reflective in nature when viewed under reflected light microscopy and bright field
illumination.
3.1.2 chips, n—break-outs of material greater in extent than 0.25 mm [0.1 in.] typically at the corner chamfers
...
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