The purpose of this SAE Recommended Practice is to encourage the standardization of mounting patterns for engine cooling fans as new engines are designed and developed in SI metric units. It is specifically not the objective of the specification to address the soft metric conversion of existing mounting patterns on engines designed in English units.
The scope of the specification is limited to heavy-duty diesel engine manufacturers, fan suppliers, and end users. Standard mounting patterns are given for fans up to 2000 mm rotating diameter. Passenger car and light-duty fans were not addressed because committee members issuing the specification felt that standards for these fans could be better addressed by personnel working in the market segments which use those fans. See Figure 1 and Table 1.
Rationale for issuance of the specification is cost savings through reduction of part numbers and inventory. Failure to comply with this specification will result in the need to release and carry in inventory parts of identical blade geometry and construction, but with different mounting patterns.
The Cooling Systems Standards Committee is part of the Vehicle Engineering Systems Group and reports to the Motor Vehicle Council. The Committee is responsible for developing and maintaining SAE Standards, Recommended Practices, and Information Reports related to engine cooling systems and components for automobiles and light trucks, heavy duty on-and off-highway vehicles and industrial equipment. All standards reflect the latest technology and industry practice through advisement, consultation and cooperation with industry, government, educational institutions, the public, other standardizing bodies, and other SAE committees and members. Participants in the SAE Cooling Systems Standards Committee include OEMs, suppliers, consulting firms, government, and other interested parties, who assist the SAE Engineering Activity Board through the preparation and presentation of technical papers at national meetings and specialty conferences.
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