Model: 3249751

Helical Gear

Special Features:

Two holes 1/2 in.-20 thd size, three holes 0.623 to 624 in. Located on 7-1/2 in. Bolt circle located on first end

Properties:

Body Style
Webbed, offset, solid
Attachment Method
Mounting hole
Pitch Diameter
18.1491 inches
Teeth Quantity
77
Bore Style
Plain both ends
Hardness Rating
89.0 rockwell c and 96.0 rockwell c
Mounting Hole Type And Quantity
6 plain axially through body, first end
Outside Diameter
18.480 inches
Nominallength
2.750 inches
Teeth Type
Single helix
Tooth Form
Standard
Tooth Direction
Left
Pressure Angle
14.5000 degrees
Helix Angle
45.0000 degrees
Distance Between Body Face And Recessed Hub End
0.125 inches first end
Distance Between Body Face And Recessed Hub End
1.000 inches second end
Face Width
2.750 inches
Bore Diameter
6.0000 inches both ends
Counterbore Depth
0.812 inches first end
Counterbore Diameter
8.500 inches first end
Hub Style Designator
Plain both ends
Hub Diameter
9.625 inches first end
Hub Diameter
8.500 inches second end
Mounting Hole Diameter
0.531 inches axially through body, first end
Bolt Hole Circle Diameter
7.250 inches axially through body, first end
Material
Steel
Style Designator
Recessed hubs
NSN
3020-00-243-7294
Part Number
3249751
Description
Gear,helical
CAGE
55380

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 3249751 NSN 3020-00-243-7294

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

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
197339
UFC:
96710
LTL:
65.0
LCL:
60.0
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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