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SAE J1998 (JUN2008)

Current Revision

Internal Combustion Engines--Piston Rings--Rectangular Rings With Narrow Ring Width

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This SAE Standard specifies the essential dimensional features of R, B, and M rectangular piston ring types with narrow ring width. Dimensional tables 8 and 9 allow for the use of cast iron (table 8) or steel (table 9). Since the modulus of elasticity of steel rings is higher than that of cast iron rings, the fluctuation in the surface pressure will become greater if the free gap is set as the reference for force. Therefore, forces are set using the surface pressure as the reference, in order to minimize the effect of the fluctuation. The requirements of this document apply to rectangular rings for reciprocating internal combustion engines up to and including 90 mm diameter for cast iron rings and up to and including 100 mm diameter for steel. They may also be used for piston rings of compressors working under similar conditions.

SDO SAE: SAE International
Document Number J1998
Publication Date June 30, 2008
Language en - English
Page Count 18
Revision Level 200806
Supercedes
Committee
Publish Date Document Id Type View
June 30, 2008 J1998_200806 Revision
April 17, 1998 J1998_199804 Revision
Oct. 1, 1992 J1998_199210 Revision
June 1, 1990 J1998_199006 Revision