Product Details | SPUR ANTIBACKLASH GEAR

3020-00-771-0598 An item having one fixed gear and one free gear, both having the same complement of spur 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.

Part Alternates: VCAA103PRECISI0N, 9174827, 3020-00-771-0598, 00-771-0598, 3020007710598, 007710598

Mechanical Power Transmission Equipment | Gears, Pulleys, Sprockets, and Transmission Chain

Supply Group (FSG) NSN Assign. NIIN
30 01 JAN 1962 00-771-0598

Drawings & Photos | NSN 3020-00-771-0598


Cross Reference | NSN 3020-00-771-0598

Part Number Cage Code Manufacturer
9174827 18876 U S ARMY AVIATION AND MISSILE COMMAND
VCAA103PRECISI0N 01147 ARCH GEAR WORKS INC

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Technical Data | NSN 3020-00-771-0598

Characteristic Specifications
MATERIAL ALUMINUM ALLOY BODY ALUMINUM ALLOY HUB
SURFACE TREATMENT ANODIZE OVERALL
TEETH QUANTITY 123
TOOTH FORM STANDARD
PRESSURE ANGLE 20.0000 DEGREES
PRECISION CLASSIFICATION QUALITY NUMBER 10
BACKLASH DESIGNATION GRADE C
STYLE DESIGNATOR 4 PROTRUDING HUBS
PITCH DIAMETER 1.9218 INCHES NOMINAL
NOMINAL OVERALL LENGTH 0.578 INCHES
NOMINAL OUTSIDE DIAMETER 1.952 INCHES
FACE NOMINAL WIDTH 0.114 INCHES
NOMINAL DISTANCE BETWEEN BODY FACE AND PROTRUDING HUB END 0.427 INCHES FIRST END 0.037 INCHES SECOND END
BORE STYLE 1 PLAIN BOTH ENDS
BORE NOMINAL DIAMETER 0.250 INCHES BOTH ENDS
HUB STYLE DESIGNATOR 4C 3 STEPS FIRST END 1 PLAIN SECOND END
HUB NOMINAL DIAMETER 0.813 INCHES SECOND END
END NOMINAL LENGTH 0.046 INCHES FIRST END
END NOMINAL DIAMETER 0.748 INCHES FIRST END
FIRST STEP NOMINAL LENGTH 0.047 INCHES FIRST END
FIRST STEP NOMINAL DIAMETER 1.000 INCHES FIRST END
SECOND STEP NOMINAL LENGTH 0.297 INCHES FIRST END
SECOND STEP NOMINAL DIAMETER 0.748 INCHES FIRST END
THIRD STEP NOMINAL LENGTH 0.037 INCHES FIRST END
THIRD STEP NOMINAL DIAMETER 1.000 INCHES FIRST END
FIRST GROOVE NOMINAL WIDTH 0.270 INCHES FIRST END
FIRST GROOVE NOMINAL DIAMETER 0.747 INCHES FIRST END
NOMINAL DISTANCE FROM END TO FIRST GROOVE 0.093 INCHES FIRST END
ATTACHMENT METHOD MOUNTING HOLE
MOUNTING HOLE TYPE AND QUANTITY 2 THREADED TRANSVERSELY THROUGH HUB, FIRST END
MOUNTING HOLE THREAD SERIES DESIGNATOR UNC TRANSVERSELY THROUGH HUB, FIRST END
MOUNTING HOLE NOMINAL THREAD SIZE 0.138 INCHES TRANSVERSELY THROUGH HUB, FIRST END
MOUNTING HOLE THREAD QUANTITY PER INCH 32 TRANSVERSELY THROUGH HUB, FIRST END
SPECIAL FEATURES MTG HOLES 90 DEGS APART

Restrictions/Controls & Freight Information | NSN 3020-00-771-0598

Category Code Description
Shelf-Life Code:0Nondeteriorative
Hazardous Material Indicator CodeNThere is no data in the HMIS and the NSN is in an FSC not generally suspected of containing hazardous materials
Demilitarization Code:BMunitions List Item - Mutilation (MUT) to the point of scrap required. (Formerly: Demilitarization not required. Trade Security Controls (TSCs) required at disposition.)
Controlled Inventory Item Code:UUNCLASSIFIED
Precious Metals Indicator Code:UPrecious metal type is unknown
Criticality Code:X The item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application.
Category Code Description
NMF Description 197339 WHEELS COG/GEAR/PINION I/S
Less than car load rating
Less than truck load rating R 65.0
Water commodity Code 586 unknown
Originating Activity Code XX
Air Dimension Code A Shipment is not a consolidation and does not exceed 72 inches in any dimension.
Air Commodity V Vehicles, machinery, shop and warehouse equipment and supplies, including special tools and equipment, ground servicing and special purpose vehicles, marine equipment and supplies, repair and maintenance parts for the above.
Air Special Handling Z No special handling required.
Special Handling Code 9 unknonwn
HAZMAT
Type of Cargo Z No special type of cargo code applicable

Management | NSN 3020-00-771-0598

Category Code Description
Materiel Category and Inventory ManagerJ Ground Forces Support Materiel (DLA/GSA Items)
Appropriation and Budget Activity2 Stock Fund Secondary Items
Management Inventory Segment2 NONREPARABLE ITEMS (Exclusive of Insurance and Provisioning Items). This code will be used to identify items which are not reparable.
Specific Group/Generic Code0 Medical Materiel
Weapons Systems/End Item or Homogeneous Group00DLA/GSA-Managed Items that cannot be identified to a specific Army Weapons Systems/End Item
Accounting Requirements CodeX Expendable item. An item of Army property coded with an ARC of ?X? in the AMDF. Expendable items require no formal accountability after issue from a stock record account. Commercial and fabricated items similar to items coded ?X? in the AMDF are considered expendable items.
Source of SupplySMSDefense Logistics Agency
Enterprise Business Systems
AgencyDADepartment of the Army
Service OrganizationAU.S. Army
ReparabilityZThis is a nonreparable item. If condemned or economically unserviceable, then dispose at the level authorized replace the item.
Acquisition Advice CodesVTERMINAL ITEM # Identifies items in stock, but future procurement is not authorized. Requisitions may continue to be submitted until stocks are exhausted. Preferred item National Stock Number is normally provided by application of the phrase: When Exhausted Use (NSN). Requisitions will be submitted in accordance with IMM/Service requisitioning procedures as applicable.
Controlled Item CodeUUNCLASSIFIED
Shelf Life Code0Nondeteriorative
Purchasing QTY
UOM
1
EA : Each
Category Code Description
Stores Account Code1Marine Corps Stock Fund Account Item.
Combat Essentiality Code5Critical Repair Part to a Combat Essential End Item. Those parts or components whose failure in a combat essential end item will render the end item inoperative or reduce its effectiveness below the minimum acceptable level of efficiency.
Materiel Management CodeBAll CommoditiesDefense Logistics Agency, (DLA,)
Echelon Management Code2ICP/DSSC Marine Corps-managed Recoverability Code D items and Defense Logistics Agency (DLA)/TACOM/GSA) items which the integrated manager has not decontrolled.
Source of SupplySMSDefense Logistics Agency
Enterprise Business Systems
AgencyDMU.S. Marine Corps
Service OrganizationMU.S. Marine Corps
ReparabilityZNonreparable item. When unserviceable, condemn and dispose at the level indicated by the first digit of the maintenance code.
Acquisition Advice CodesVTERMINAL ITEM # Identifies items in stock, but future procurement is not authorized. Requisitions may continue to be submitted until stocks are exhausted. Preferred item National Stock Number is normally provided by application of the phrase: When Exhausted Use (NSN). Requisitions will be submitted in accordance with IMM/Service requisitioning procedures as applicable.
Controlled Item CodeUUNCLASSIFIED
Shelf Life Code0Nondeteriorative
Purchasing QTY
UOM
1
EA : Each