A-A-52155B
2.3 Nominal belt width (SAE size).
0.380 in.
0.500 in.
11/16 in.
3/4 in.
7/8 in.
1.0 in.
3. SALIENT CHARACTERISTICS.
3.1 Materials. Belt cord shall be pre-stretched and impregnated with a rubber compound. Cord for grade A belts shall be natural or synthetic fibers. Grade B belts shall have polyester cord. The use of recovered materials made in compliance with regulatory requirements is acceptable providing that all requirements of this CID are met (see 4).
3.2 Construction. The construction of stock V-belts shall consist of tension members (inserts)
and a compression member (cushion) molded into an endless loop having a trapezoidal cross-section. The belt dimensions, tolerances, and method of measurement shall be in accordance with SAE J636.
3.2.1 Belt lengths. Unless otherwise specified (see 7.3), the effective lengths for each nominal width classification of belts shall be as shown in table I.
3.2.2 Belt grade. Unless otherwise specified (see 7.3), the belts shall be grade A.
3.2.3 Belt style. The belt style (see 2), shall be as specified in the contract or order (see 7.3). If any belt style is acceptable, it shall be so stated in the contract or order (see 7.3).
3.3 Belt matched sets. When specified (see 7.3), belts shall be furnished in matched sets of the size and number of belts required.
3.4 Performance.
3.4.1 Fatigue. The belts shall not break nor any portion of the belt chunk out during a 100 hour operating period when tested for fatigue in accordance with SAE J637. For belt widths
20 millimeter (mm) (7/8 in.) and greater, the fatigue test horsepower (hp) loads shall be as listed in table II.
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