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Part Number

Part Number:
NSN:
NIIN:
Item Name:
BELL CRANK

Definition:

AN ITEM IN THE FORM OF TWO ARMS AT AN ANGLE, HAVING ITS FULCRUM AT THE APEX OF THE ANGLE, AND USED TO PROVIDE A MEANS OF CHANGING THE DIRECTION OR VARYING THE INTENSITY OF A PUSHING OR PULLING FORCE. SEE ALSO ARM (AS MODIFIED); AND LEVER (AS MODIFIED).

CAGE Information

Code Company
78286 SIKORSKY AIRCRAFT CORPORATION

Federal Supply Class

Title

MISCELLANEOUS AIRCRAFT ACCESSORI

Inclusions:

INCLUDES CONTROL ASSEMBLIES, PUSH-PULL; BRACE, POSITIONING CARGO RAMP STOWED ON BOARD; COCKPIT MOUNTED CONTROL QUADRANTS; ACTUATORS, ELECTRO-MECHANICAL AND MECHANICAL; VENTILATORS; RELIEF TUBES; MAP HOLDERS; AERIAL GLIDER TOWING ACCESSORIES ATTACHED TO AIRCRAFT; BELTS, SAFETY AND LAP; HARNESS, SHOULDER AND SAFETY; LITTER ATTACHING SUPPORTS;ELECTRIC WINDSHIELD WIPERS;AIRCRAFT ONBOARD INERT GAS GENERATORS;AIRCRAFT FURNITURE;AIRCRAFT MOUNTED WINCHES AND HOISTS;IN-FLIGHT REFUELING SYSTEM COMPONENTS, INCLUDING FUEL COMPONENTS;AIRCRAFT CURTAINS;CABLE TENSION REGULATORS;SUN VISORS;REAR-VIEW MIRRORS;MECHANICAL TRANSMISSIONS, GEARBOXES AND CONSTANT SPEED DRIVES SPECIALLY DESIGNED FOR AIRCRAFT.

Exclusions:

EXCLUDES ENGINE MOUNTED CONTROL ASSEMBLIES; FITTED COVERS, AIRCRAFT PYLONS; HELICOPTER ROTER BRAKE SYSTEM COMPONENTS; HELICOPTER AUTOMATIC STABILIZATION EQUIPMENT.

Characteristics (Decoded)

MRC Requirements Statement Clear Text Reply
CBBL FEATURES PROVIDED BEARING
CBBL FEATURES PROVIDED BEARING
CZLM CENTER TO CENTER DISTANCE BETWEEN FULCRUM AND ARM END HOLE/SLOT/BALL 1.364 INCHES MINIMUM 1ST END AND 1.412 INCHES MAXIMUM 1ST END
STYL STYLE DESIGNATOR CLEVIS ENDS
SFTT SURFACE TREATMENT ANODIZE
FEAT SPECIAL FEATURES CYCLIC PITCH CONTROL, CONTROL ASSY, ROTOR, HELICOPTER
MATT MATERIAL ALUMINUM ALLOY
CZLN END HOLE/BALL DIAMETER 0.249 INCHES MINIMUM 1ST END AND 0.250 INCHES MAXIMUM 1ST END
ABXV BORE DIAMETER 0.249 INCHES NOMINAL
CZLM CENTER TO CENTER DISTANCE BETWEEN FULCRUM AND ARM END HOLE/SLOT/BALL 3.984 INCHES MINIMUM 2ND END AND 4.032 INCHES MAXIMUM 2ND END
ADGE BORE LENGTH 0.870 INCHES MINIMUM AND 0.875 INCHES MAXIMUM
CZLN END HOLE/BALL DIAMETER 0.249 INCHES MINIMUM 2ND END AND 0.250 INCHES MAXIMUM 2ND END
MDCL MATERIAL DOCUMENT AND CLASSIFICATION AMS4138, COND 7079, TEMPER T6 ASSN STD SINGLE MATERIAL RESPONSE

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