Model: 658697

Spur Antibacklash Gear

Properties:

Attachment Method
Mounting hole
Pitch Diameter
1.1250 inches
Teeth Quantity
270
Bore Style
Plain both ends
Mounting Hole Type And Quantity
2 countersunk transversely through hub, first end and 1 plain transversely through hub, first end
Outside Diameter
1.140 inches
Nominallength
0.315 inches
Tooth Form
Standard
Pressure Angle
20.0000 degrees
Distance Between Body Face And Protruding Hub End
0.030 inches second end
Face Width
0.101 inches
Bore Diameter
0.120 inches both ends
Hub Style Designator
Plain second end
Hub Style Designator
Split first end
Hub Diameter
0.145 inches both ends
Clamping Surface Length
0.140 inches first end
Mounting Hole Diameter
0.046 inches transversely through hub, first end
Material
Aluminum alloy 6061
Material Specification
Qq-a-225/8, t651 federal specification single material response
Style Designator
Peripheral face, hubless
NSN
3020-00-938-4450
Part Number
658697
Description
Gear,antibacklash,spur
CAGE
06481

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 658697 NSN 3020-00-938-4450

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:
A
ESD:
ESD:
MMAC:
BJ
CRITL:
X

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
197339
UFC:
96710
LTL:
65.0
LCL:
60.0
WCC:
593
TCC:
Z
SHC:
Z
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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