Model: C3974

Worm Wheel Gear

Properties:

Body Style
Webbed, with lightening holes
Attachment Method
Mounting hole
Pitch Diameter
19.4950 inches
Teeth Quantity
70
Face Type
Concave
Bore Style
W/counterbore counterbore, first end
Mounting Hole Thread Series Designator
Unc axially through body, first end
Mounting Hole Thread Size
0.625 inches axially through body, first end
Mounting Hole Type And Quantity
6 threaded axially through body, first end
Outside Diameter
20.332 inches
Tooth Direction
Right
Throat Radius
1.471 inches
Mating Thread Lead Quantity
2
Pressure Angle
20.0000 degrees
Helix Angle
9.0499 degrees
Distance Between Body Face And Protruding Hub End
1.000 inches both ends
Face Width
2.000 inches
Bore Diameter
3.750 inches counterbore, first end
Counterbore Depth
0.250 inches counterbore, first end
Counterbore Diameter
11.000 inches counterbore, first end
Hub Style Designator
Plain both ends
Hub Diameter
12.000 inches first end
Hub Diameter
6.000 inches second end
Bolt Hole Circle Diameter
9.000 inches axially through body, first end
Material
Copper alloy
Material Specification
Mil-b-16522, cl 1 military specification single material response
Style Designator
Protruding hubs
NSN
3020-00-517-2765
Part Number
C3974
Description
Gear,worm Wheel
CAGE
30177

A gear, cylindrical in form, with spiral teeth designed to mesh with the thread forms of a gear (1), worm. See also gear, antibacklash, worm wheel.

Part C3974 NSN 3020-00-517-2765

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
05468
FIIG:
A27300
Concept No.:
1
App. Key:
AK
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:
105.0000lbs
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:
197337
UFC:
96690
LTL:
RATING VARIABLE
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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