| MATERIAL | STEEL COMP 8620 OVERALL |
| MATERIAL DOCUMENT AND CLASSIFICATION | 66 FED STD SINGLE MATERIAL RESPONSE AND |
| AISI/SAE 8620 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| HARDNESS RATING | 58.0 ROCKWELL C MINIMUM AND |
| 63.0 ROCKWELL C MAXIMUM HUB |
| 35.0 ROCKWELL C MINIMUM AND |
| 40.0 ROCKWELL C MAXIMUM TEETH |
| TEETH QUANTITY | 27 |
| TEETH TYPE | STRAIGHT |
| PRESSURE ANGLE | 20.0000 DEGREES |
| PITCH ANGLE | 45.0000 DEGREES |
| STYLE DESIGNATOR | PERIPHERAL FACE, BACK HUB PROTRUDING |
| PITCH DIAMETER | 4.5000 INCHES NOMINAL |
| NOMINAL OVERALL LENGTH | 2.062 INCHES |
| NOMINAL OUTSIDE DIAMETER | 4.678 INCHES |
| FACE NOMINAL WIDTH | 1.250 INCHES |
| NOMINAL DISTANCE BETWEEN BODY FACE AND PROTRUDING HUB END | 0.875 INCHES SECOND END |
| BODY RECESS NOMINAL DEPTH | 0.3750 INCHES FIRST END |
| BORE STYLE | STRAIGHT SPLINE BOTH ENDS |
| BORE NOMINAL DIAMETER | 1.438 INCHES BOTH ENDS |
| SPLINE QUANTITY | 6 BOTH ENDS |
| HUB STYLE DESIGNATOR | 1 STEP SECOND END |
| END NOMINAL LENGTH | 0.751 INCHES SECOND END |
| END NOMINAL DIAMETER | 1.772 INCHES SECOND END |
| FIRST STEP NOMINAL LENGTH | 0.875 INCHES SECOND END |
| FIRST STEP NOMINAL DIAMETER | 2.250 INCHES SECOND END |
| BODY STYLE | PLAIN, SOLID |
| SPECIAL FEATURES | 0.1875 IN. BY 30 DEG CHAMFER ON HUB END OF BORE- ONE GROOVE 0.250 IN.W,0.619IN. FROM END OF HUB |