Model: R21-55

Spur Gear

Properties:

Body Style
Plain, solid
Attachment Method
Clamp
Pitch Diameter
Between 1.1448 inches and 1.1458 inches
Teeth Quantity
55
Bore Style
Plain both ends
Hardness Rating
75.0 rockwell b and 83.0 rockwell b
Hardness Rating
75.0 rockwell b and 83.0 rockwell b
Outside Diameter
1.186 inches
Tooth Form
Standard
Pressure Angle
20.0000 degrees
Distance Between Body Face And Protruding Hub End
0.281 inches first end
Face Width
0.125 inches
Bore Diameter
0.250 inches both ends
Hub Style Designator
Split first end
Hub Diameter
0.311 inches first end
Clamping Surface Length
0.250 inches first end
Precision Classification
Quality number 10
Material
Steel comp 303s and steel comp 303se
Material
Steel comp 303s and steel comp 303se
Material Specification
Mil-s-7720 military specification single material response
Surface Treatment
Passivate
Style Designator
Protruding hub
NSN
3020-00-589-5734
Part Number
R21-55
Description
Gear,spur
CAGE
00328

A gear, cylindrical in form, with straight teeth on the outer surface parallel to the axis of the gear. See also gear, antibacklash, spur. For bulk material, see rod, pinion.

Part R21-55 NSN 3020-00-589-5734

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
05466
FIIG:
A27300
Concept No.:
1
App. Key:
AH
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:
--
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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