Model: 3956

Helical Gear

Special Features:

Tone groove 0.312 in. Min 0.315 in. Max w 1st end on body of gear, timing mark located 1.125 in. From center of bore 9 degrees 10 min ccw from centerline of groove on 2nd end, figure x on face of gear tooth 135 degrees cw from timing mark

Properties:

Body Style
Plain, solid
Pitch Diameter
2.5310 inches
Teeth Quantity
24
Bore Style
Plain both ends
Outside Diameter
2.631 inches
Teeth Type
Single helix
Tooth Form
Standard
Tooth Direction
Left
Pressure Angle
20.0000 degrees
Helix Angle
18.7665 degrees
Distance Between Body Face And Protruding Hub End
0.0360 inches first end
Face Width
0.465 inches
Bore Diameter
0.624 inches both ends
Hub Style Designator
Plain first end
Hub Diameter
0.938 inches first end
Material
Steel
Material Specification
Fed standard 66, c1113, c1115, c1117 federal standard single material response
Style Designator
Protruding hub
NSN
3020-00-358-7204
Part Number
3956
Description
Gear,helical
CAGE
79575

A gear, cylindrical in form, with teeth on the outer surface at an angle to the axis of the gear. See also gear, antibacklash, helical:

Part 3956 NSN 3020-00-358-7204

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
05464
FIIG:
A27300
Concept No.:
1
App. Key:
AF
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:
0.1000lbs
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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