Model: SM-D-447421

Spur Antibacklash Gear

Special Features:

Spring matl music wire qq-w-470, finish cadmium dichromate mil-f-14072 m225

Properties:

Pitch Diameter
1.2500 inches
Teeth Quantity
60
Backlash Designation
Grade c
Nominallength
0.864 inches
Tooth Form
Standard
Pressure Angle
20.0000 degrees
Face Width
0.125 inches
Style Designator
Protruding hubs
NSN
3020-01-103-2778
Part Number
SM-D-447421
Description
Gear,antibacklash,spur
CAGE
80063

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 SM-D-447421 NSN 3020-01-103-2778

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

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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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