| MATERIAL | STEEL COMP 4140 OVERALL |
| MATERIAL DOCUMENT AND CLASSIFICATION | 66 FED STD SINGLE MATERIAL RESPONSE AND |
| AISI/SAE 4140 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| HARDNESS RATING | 32.0 ROCKWELL C MINIMUM AND |
| 36.0 ROCKWELL C MAXIMUM HUB |
| 85.0 ROCKWELL SUPERFICIAL 15-N MINIMUM TEETH |
| TEETH QUANTITY | 65 |
| TOOTH FORM | STANDARD |
| PRESSURE ANGLE | 25.0000 DEGREES |
| STYLE DESIGNATOR | PROTRUDING HUB, RECESSED BODY |
| PITCH DIAMETER | 8.1250 INCHES NOMINAL |
| NOMINAL OUTSIDE DIAMETER | 8.358 INCHES |
| FACE NOMINAL WIDTH | 0.380 INCHES |
| NOMINAL DISTANCE BETWEEN BODY FACE AND PROTRUDING HUB END | 0.762 INCHES FIRST END |
| BODY RECESS NOMINAL DEPTH | 0.203 INCHES FIRST END |
| BORE STYLE | W/COUNTERBORE BOTH ENDS |
| BORE NOMINAL DIAMETER | 3.938 INCHES BOTH ENDS |
| COUNTERBORE NOMINAL DEPTH | 0.706 INCHES FIRST END |
| COUNTERBORE NOMINAL DIAMETER | 4.330 INCHES FIRST END |
| HUB STYLE DESIGNATOR | PLAIN FIRST END |
| HUB NOMINAL DIAMETER | 5.502 INCHES FIRST END |
| BODY STYLE | WEBBED, OFFSET, SOLID |
| ATTACHMENT METHOD | MOUNTING HOLE |
| MOUNTING HOLE TYPE AND QUANTITY | 8 THREADED AXIALLY THROUGH HUB, FIRST END |
| MOUNTING HOLE THREAD SERIES DESIGNATOR | UNF AXIALLY THROUGH HUB, FIRST END |
| MOUNTING HOLE NOMINAL THREAD SIZE | 0.312 INCHES TRANSVERSELY THROUGH HUB, FIRST END |
| MOUNTING HOLE THREAD QUANTITY PER INCH | 24 AXIALLY THROUGH HUB, FIRST END |
| BOLT HOLE CIRCLE NOMINAL DIAMETER | 4.920 INCHES AXIALLY THROUGH HUB, FIRST END |
| THE MANUFACTURERS DATA | |
| MANUFACTURERS CODE | 19207 |
| DESIGN CONTROL REFERENCE | 8356397 |