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National Stock Number:
3020-01-117-0334
Federal Supply Class:
3020
National Item Identification Number:
011170334
Description:
GEAR,ANTIBACKLASH,HELICAL
Detail:
AN ITEM HAVING ONE FIXED GEAR AND ONE FREE GEAR, BOTH HAVING THE SAME COMPLEMENT OF HELICAL GEAR TEETH, MOUNTED ON A COMMON HUB. THE FREE GEAR IS ATTACHED TO THE FIXED GEAR BY SPRINGS AND OPERATES AS ONE GEAR. UPON INSTALLATION WITH THE MATING GEAR, THE TEETH OF THE FREE MOVING GEAR ARE PRESET TO MESH WITH TEETH OTHER THAN THOSE OF THE FIXED GEAR. THIS SPRING TENSION BETWEEN THE FIXED GEAR AND THE FREE GEAR ELIMINATES ANY FREE MOTION BETWEEN THE DRIVER AND THE DRIVEN GEAR. THE GEAR IS USED WHERE IDENTICAL AND ACCURATE TRANSMITTED MOTION BETWEEN GEARS IS REQUIRED.
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Manufacturer Information:
| 3274302 | 10001 | NAVAIR AND NAVSEA MANAGED ORIGINAL DESIGN ACTIVITY DWG NOT MATERIAL/PARTS SUPPLIER | | 3274302 | 36549 | JOLY ENGINEERING LTD |
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Techincal Specification:
| MATERIAL | STEEL COMP 4140 OR | | STEEL COMP 4140H OVERALL | | MATERIAL DOCUMENT AND CLASSIFICATION | 66 FED STD 1ST MATERIAL RESPONSE OR | | MIL-S-890 MIL SPEC 2ND MATERIAL RESPONSE OVERALL | | SURFACE TREATMENT | OXIDE OVERALL | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | MIL-C-13924,CL 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL | | HARDNESS RATING | 27.0 ROCKWELL C MINIMUM AND | | 32.0 ROCKWELL C MAXIMUM OVERALL | | TEETH QUANTITY | 124 | | TEETH TYPE | SINGLE HELIX | | TOOTH FORM | STANDARD | | TOOTH DIRECTION | LEFT | | PRESSURE ANGLE | 20.0000 DEGREES | | HELIX ANGLE | 15.0000 DEGREES | | PRECISION CLASSIFICATION | QUALITY NUMBER 12 OR | | QUALITY NUMBER 13 | | STYLE DESIGNATOR | PROTRUDING HUB | | PITCH DIAMETER | 6.2000 INCHES NOMINAL | | NOMINAL OUTSIDE DIAMETER | 6.300 INCHES | | FACE NOMINAL WIDTH | 0.380 INCHES | | NOMINAL DISTANCE BETWEEN BODY FACE AND PROTRUDING HUB END | 0.336 INCHES FIRST END | | BORE STYLE | W/ KEYWAY BOTH ENDS | | BORE NOMINAL DIAMETER | 0.957 INCHES BOTH ENDS | | KEYWAY NOMINAL WIDTH | 0.156 INCHES BOTH ENDS | | NOMINAL DISTANCE FROM BORE CENTER TO KEYWAY BOTTOM | 0.518 INCHES BOTH ENDS | | HUB STYLE DESIGNATOR | PINNED FIRST END | | HUB NOMINAL DIAMETER | 1.499 INCHES FIRST END |
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