Model: 3274302

Helical Antibacklash Gear

Properties:

Pitch Diameter
6.2000 inches
Teeth Quantity
124
Bore Style
10a w/ keyway both ends
Hardness Rating
27.0 rockwell c and 32.0 rockwell c
Outside Diameter
6.300 inches
Teeth Type
Single helix
Tooth Form
Standard
Tooth Direction
Left
Pressure Angle
20.0000 degrees
Helix Angle
15.0000 degrees
Distance Between Body Face And Protruding Hub End
0.336 inches first end
Face Width
0.380 inches
Bore Diameter
0.957 inches both ends
Keyway Width
0.156 inches both ends
Distance From Bore Center To Keyway Bottom
0.518 inches both ends
Hub Style Designator
Pinned first end
Hub Diameter
1.499 inches first end
Precision Classification
Quality number 12 or quality number 13
Material
Steel comp 4140 or steel comp 4140h
Material Specification
66 federal standard 1st material response or mil-s-890 military specification 2nd material response
Surface Treatment
Oxide
Surface Treatment Specification
Mil-c-13924, cl 1 military specification single treatment response
Style Designator
Protruding hub
NSN
3020-01-117-0334
Part Number
3274302
Description
Gear,antibacklash,helical
CAGE
10001

An item having one fixed gear and one free gear, both having the same complement of helical 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 3274302 NSN 3020-01-117-0334

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
26667
FIIG:
A27300
Concept No.:
App. Key:
AB
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:
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:
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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