Model: 1293787-2

Spur Antibacklash Gear

Special Features:

Mtg hols 180 degs apart; weapon system essential

Properties:

Attachment Method
Mounting hole
End Application
Guided missile, intercept
Pitch Diameter
4.0000 inches
Teeth Quantity
182
Bore Style
Plain both ends
Criticality Code Justification
Feat
Mounting Hole Type And Quantity
2 plain transversely through face
Outside Diameter
4.042 inches
Nominallength
0.380 inches
Tooth Form
Standard
Pressure Angle
20.0000 degrees
Distance Between Body Face And Protruding Hub End
0.085 inches second end
Distance Between Body Face And Protruding Hub End
0.113 inches first end
Face Width
0.182 inches
Bore Diameter
0.240 inches both ends
Hub Style Designator
Plain both ends
Hub Diameter
0.609 inches second end
Hub Diameter
0.875 inches first end
Mounting Hole Diameter
0.406 inches transversely through face
Part Name Assigned By Controlling Agency
Gear assembly, spur, anti-backlash
Material
Aluminum alloy first gear
Material Specification
Mil-s-7720, cond b military specification single material response hub
Material Specification
Qq-a-355, cond t3 federal specification single material response first gear
Material Specification
Qq-a-355, cond t3 federal specification single material response second gear
Surface Treatment
Anodize first gear
Surface Treatment
Anodize second gear
Surface Treatment
Passivate hub
Surface Treatment Specification
171, finish 7.1.1stdc1ljea171, finsish 7.1.1 military standard single treatment response first gear
Style Designator
Protruding hubs
NSN
3020-00-713-8245
Part Number
1293787-2
Description
Gear,antibacklash,spur
CAGE
55972

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 1293787-2 NSN 3020-00-713-8245

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
26668
FIIG:
A27300
Concept No.:
App. Key:
AC
Cond. Code:
1
Status:
A

Material Classification

Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicators
HMIC
PMIC
ESD/EMI
ENAC
MMAC
CRITL
HMIC:
N
PMIC:
U
ESD:
ESD:
MMAC:
CRITL:
Y

Packaging & Shipping

Est. Pack Size
Est. Pack Weight
Est. Item Weight
Est. Item Dim.
Pack Size:
--
Paclk Weight:
0.2000lbs
Item Weight:
--
Item Dim:
--
OPI
SPI No.
SPI Rev.
SPC Mkg.
LVL A
LVL B
OPI:
O
SPI No.:
SPI Rev.:
SPC Mkg:
00
LVL_A:
Q
LVL_B:
Q

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
197339
UFC:
96710
LTL:
65.0
LCL:
--
WCC:
593
TCC:
Z
SHC:
9
ACC:
Trailers/Vehicles

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Schedule B and Export
  • Schedule B: 8483409000
  • SITC: 74840
  • End Use: Industrial machines, other
  • NAICS: 333612
  • USDA: 1

Freight Class: Gears and gearing, other than toothed wheels, chain sprockets and other transmission elements entered separately

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