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ASTM B438-13

Standard Specification for Bronze-Base Powder Metallurgy (PM) Bearings (Oil-Impregnated)

Automaticky přeložený název:

Standard Specification pro Bronze-Base práškové metalurgie (PM) Ložiska (Oil-impregnované)

NORMA vydána dne 1.4.2013

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Provedení	PDF - okamžité stažení - 2 896.10 Kč Tištěné - 2 896.10 Kč
Dostupnost	SKLADEM
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Informace o normě:

Označení normy: ASTM B438-13
Poznámka: NEPLATNÁ
Datum vydání normy: 1.4.2013
Kód zboží: NS-6689
Počet stran: 27
Přibližná hmotnost: 81 g (0.18 liber)
Země: Americká technická norma
Kategorie: Technické normy ASTM

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Anotace textu normy ASTM B438-13 :

Keywords:

bearing breaking load, bronze bearings, impregnated density, interconnected porosity, oil content, oil-impregnated bearings, open porosity, porous metallic bearings, radial crushing strength, self-lubricating bearings, PM bearings, PV Factor, PV Limit, ICS Number Code 21.100.01 (Bearings in general)

Doplňující informace

1. Scope

1.1 This specification covers porous metallic sleeve, flange, thrust and spherical bronze-base bearings that are produced from mixed metal powders utilizing powder metallurgy (PM) technology and then impregnated with oil to supply operating lubrication.

1.2 Included are the specifications for the chemical, physical and mechanical requirements of those bronze-base PM materials that have been developed and standardized specifically for use in the manufacture of these self-lubricating bearings.

1.3 This specification is applicable to the purchase of bronze-base bearings (oil-impregnated) that were formerly covered by military specifications and are intended for government or military applications. Those additional government requirements that only apply to military bearings are listed in the Supplementary Requirements section of this specification.

1.4 This specification accompanies Specification B439 that covers the requirements for Iron-Base Powder Metallurgy (PM) Bearings, (Oil-Impregnated).

1.5 Typical applications for bronze-base bearings are listed in Appendix X1.

1.6 Bearing dimensional tolerance data are shown in 1.7 With the exception of density values for which the g/cm³ unit is the industry standard, the values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.

1.8 The following safety hazards caveat pertains only to the test methods described in this specification. This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

2. Referenced Documents

QPL-6085	Lubricating Oil Instrument, Aircraft, Low Volatility
MIL-B-5687	Bearings, Sleeve, Washers, Thrust, Sintered, Metal Powder, Oil-Impregnated, General Specification For
QPL-17331	Lubricating Oil, Steam Turbine and Gear, Moderate Service
E1019-18	Standard Test Methods for Determination of Carbon, Sulfur, Nitrogen, and Oxygen in Steel, Iron, Nickel, and Cobalt Alloys by Various Combustion and Inert Gas Fusion Techniques
E29-22	Standard Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
E9-19	Standard Test Methods of Compression Testing of Metallic Materials at Room Temperature
B970-09	Standard Test Method for Cleanliness of Powder Metallurgy (PM) Bearings and Structural Parts (Withdrawn 2016)
B966-10	Standard Test Method for Permeability of Powder Metallurgy (PM) Bearings Using Nitrogen Gas (Withdrawn 2015)
B963-22	Standard Test Methods for Oil Content, Oil-Impregnation Efficiency, and Surface-Connected Porosity of Sintered Powder Metallurgy (PM) Products Using Archimedes’ Principle
B946-23	Standard Test Methods for Surface Roughness of Powder Metallurgy (PM) Products
B939-21	Standard Test Method for Radial Crushing Strength, K, of Powder Metallurgy (PM) Bearings and Structural Materials
ISO 5755	Sintered Metal Materials - Specifications
ISO 2795	Plain Bearings Made from Sintered Material--Dimensions and Tolerances
B439-21	Standard Specification for Iron-Base Powder Metallurgy (PM) Bearings (Oil-Impregnated)
B243-23	Standard Terminology of Powder Metallurgy
B962-23	Standard Test Methods for Density of Compacted or Sintered Powder Metallurgy (PM) Products Using Archimedes’ Principle
MIL-PRF-6085	Lubricating Oil: Instrument, Aircraft, Low Volatility Available from Standardization Documents Order Desk, DODSSP, Bldg. 4, Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http://dodssp.daps.dla.mil. Electronic copies of military specifications may be obtained from http://assist.daps.dla.mil/.
MPIF Standard 35	Materials Standards for PM Self-Lubricating Bearings Available from Metal Powder Industries Federation (MPIF), 105 College Rd. East, Princeton, NJ 08540-6692, http://www.mpif.org.
MS21783	Bearing, Washer, Thrust, Sintered Bronze, Oil-Impregnated
MS17796	Bearing, Sleeve, Flanged, Sintered Bronze, Oil-Impregnated
MS17795	Bearing, Sleeve, Plain, Sintered Bronze, Oil-Impregnated
MIL-PRF-17331	Lubrication Oil, Steam Turbine and Gear, Moderate Service