This Recommended Practice applies to engine cooling fans up to 2000 mm in diameter with a mounting interface consisting of a pilot hole and a circular bolt pattern. Most of these fans are belt, gear, clutch, hydraulically, or electrically driven.
Rationale:
This document has been reviewed and amended by adding a table of existing common English-unit mounting patterns (legacy patterns) which still dominate in practice.
Related Topics:
Fans
Bolts
Clutches
Identification numbers
Fittings
Gears
Assembling
Also known as: SAE J 635
SAE MOBILUS
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