Model: 31121

Worm Wheel Gear

Special Features:

Second end hub includes woodruff keyway, 0.140 in. Deep, 0.124 in. Wd.

Properties:

Body Style
Webbed, offset, with lightening holes
Pitch Diameter
2.5942 inches
Teeth Quantity
163
Face Type
Concave
Bore Style
W/counterbore counter bore, second end
Outside Diameter
2.6500 inches
Tooth Direction
Left
Throat Radius
0.290 inches
Mating Thread Lead Quantity
1
Pressure Angle
20.0000 degrees
Helix Angle
1.5000 degrees
Distance Between Body Face And Protruding Hub End
1.250 inches first end
Distance Between Body Face And Protruding Hub End
0.055 inches second end
Face Width
0.255 inches
Bore Diameter
0.200 inches counterbore, first end
Counterbore Depth
0.1800 inches second end
Counterbore Diameter
0.574 inches counter bore, second end
Hub Style Designator
Plain both ends
Hub Diameter
0.745 inches second end
Hub Diameter
1.000 inches first end
Material
Stainless steel
Surface Treatment
Passivate
Style Designator
Protruding hubs
NSN
3020-00-858-0507
Part Number
31121
Description
Gear,worm Wheel
CAGE
62793

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 31121 NSN 3020-00-858-0507

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:
--
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:
133300
UFC:
63220
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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