Model: 3318-508

Spur Antibacklash Gear

Properties:

Pitch Diameter
1.2500 inches
Teeth Quantity
60
Bore Style
Plain both ends
Backlash Designation
Grade a
Outside Diameter
1.292 inches
Pressure Angle
14.5000 degrees
Face Width
0.063 inches
Bore Diameter
0.250 inches both ends
Hub Style Designator
Pinned first end
Precision Classification
Quality number 10 or quality number 11
Material
Steel comp 304
Material Specification
Qq-s-766 cond a fin 28 federal specification single material response
Surface Treatment
Passivate
Surface Treatment Specification
Cmc197-117, canadian marconi co mfr ref single treatment response
Style Designator
Protruding hub
NSN
3020-00-020-3905
Part Number
3318-508
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 3318-508 NSN 3020-00-020-3905

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

Packaging & Shipping

Est. Pack Size
Est. Pack Weight
Est. Item Weight
Est. Item Dim.
Pack Size:
--
Paclk Weight:
--
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:
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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