มอก. 1174-2536

Scope (English)

Covers piston made of aluminium alloy. Specifies mass, dimensions and tolerances on piston (e.g. outside diameter, compression, height, pin hole), dimensions and tolerances of clip grooves, dimensions of rotating stop pin, oversized piston. Prescribes chemical composition of aluminium base alloy, manufacture (e.g. hardening, expanding direction control), surface smoothness and surface roughness, hardness, fall of ring groove relative to the piston axis, error in arrangement of pin hole, fall of pin hole. Includes marking, labelling, sampling and criteria for conformity, testing.