Model: 261991-901

Spur Antibacklash Gear

Properties:

Pitch Diameter
Between 0.7802 inches and 0.7812 inches
Teeth Quantity
75
Bore Style
Plain both ends
Outside Diameter
0.801 inches
Tooth Form
Stub
Pressure Angle
20.0000 degrees
Distance Between Body Face And Protruding Hub End
0.155 inches first end
Face Width
0.095 inches
Bore Diameter
0.0311 inches both ends
Hub Style Designator
Pinned first end
Hub Diameter
0.307 inches first end
Material
Aluminum alloy 2024 teeth
Material
Aluminum alloy 2011 hub
Material Specification
Qq-a-225/3 t3 federal specification 2nd material response hub
Material Specification
Qq-a-225/6 t4 federal specification 1st material response teeth
Style Designator
Protruding hub
NSN
3020-00-495-2662
Part Number
261991-901
Description
Gear,antibacklash,spur
CAGE
65092

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 261991-901 NSN 3020-00-495-2662

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:
121870
UFC:
64910
LTL:
77.5
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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