Model: 3306-691

Spur Antibacklash Gear

Properties:

Pitch Diameter
1.2500 inches
Teeth Quantity
60
Bore Style
Plain both ends
Outside Diameter
1.2920 inches
Pressure Angle
14.5000 degrees
Distance Between Body Face And Protruding Hub End
0.185 inches first end
Distance Between Body Face And Protruding Hub End
0.063 inches second end
Face Width
0.062 inches
Bore Diameter
0.0908 inches both ends
Hub Style Designator
Plain both ends
Hub Diameter
0.185 inches second end
Hub Diameter
0.312 inches first end
Material
Steel comp 303 hub
Material
Steel teeth
Material Specification
Qq-s-764, type 303, cond a cancelled federal specification 1st material response hub
Material Specification
Qq-s-766, cl 302, cond a federal specification 2nd material response teeth
Surface Treatment
Passivate
Style Designator
Protruding hubs
NSN
3020-00-020-3920
Part Number
3306-691
Description
Gear,antibacklash,spur
CAGE
90073

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 3306-691 NSN 3020-00-020-3920

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:
X

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:
Construction Materials

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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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