AIA/NAS 726-2013 pdf download GEAR, SPUR, 20° INVOLUTE, LOW INERTIA, 48 AND FINER PITCH
MATERIAL:
ALUMINUM ALLOY – 2024 (UNS A92024) PER QQ-A-268 AMS-QQ-A-225/6, TEMPER T42 OR QQ-A-355 AMS-QQ-A-225/4, TEMPER T4.
CRES – 416 (UNS S41600) PER QQ-S-763 ASTM A581/A581M OR ASTM A582/A582M, CLASS 416,COND A.
CRES – 303 (UNS S30300) ANNEALED PER MIL-S-7720 ASTM A582/A582M, COMP. 303, COND. A.
LEADED PHOSPHOR BRONZE – 534 (UNS C53400) PER ASTM B139/B139M, HARD.
HEAT TREATMENT:
CRES 416 – MAY BE HEAT-TREATED TO 125 TO 140 KSI TO IMPROVE MACHINABILITY.
FINISH:
ALUMINUM – ANODIZE PER MIL-A-8625 BEFORE OR AFTER FINAL MACHINING (SEE CODE).
CRES – PASSIVATE PER MIL-DTL-5002.
BRONZE – NO FINISH.
CODE:
MATERIAL CODE:
“D” INDICATES ALUMINUM ALLOY
“H” INDICATES CRES AISI TYPE 416
“C” INDICATES CRES AISI TYPE 303
“B” INDICATES LEADED PHOSPHOR BRONZE TYPE 534 DIAMETRAL PITCH:
“1” INDICATES DIAMETRAL PITCH 48
“2” INDICATES DIAMETRAL PITCH 64
“3” INDICATES DIAMETRAL PITCH 72
“4” INDICATES DIAMETRAL PITCH 96
“5” INDICATES DIAMETRAL PITCH 120
“6” INDICATES DIAMETRAL PITCH 160
“7” INDICATES DIAMETRAL PITCH 200
QUALITY CLASS:
“1” INDICATES .0020 MAXIMUM TOTAL COMPOSITE ERROR
“2” INDICATES .0015 MAXIMUM TOTAL COMPOSITE ERROR
“3” INDICATES .0010 MAXIMUM TOTAL COMPOSITE ERROR
“5” INDICATES .0005 MAXIMUM TOTAL COMPOSITE ERROR
“6” INDICATES .00025 MAXIMUM TOTAL COMPOSITE ERROR
NUMBER OF TEETH: USE THREE DIGITS (EX. 032 MEANS 32 TEETH; 132 MEANS 132 TEETH) FINISH CODE:
“A” INDICATES ANODIZE AFTER FINAL MACHINING (ALUMINUM)
“T” INDICATES ANODIZE BEFORE FINAL MACHINING (ALUMINUM)
“P” INDICATES PASSIVATE (CRES)
“-” INDCIATES NO FINISH (BRONZE)
GEAR BLANK: OBTAIN CODE LISTED IN TABLE III UNDER GEAR BLANK NUMERAL.

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