Model: HM025-678-1

Spur Gear

Special Features:

Heat treat to rc31-36 per mil-h-6875, 140-160 ksi tensile strength; spline data: class of fit=5, spline pitch=24/48, pin dia.=0.072, dia. Between pins=0.4826, form dia.=0.629, tooth form=flatroot side fit involute per ansi b92.1-1970; 5 equally spaced lightening holes 0.750 in. Dia.; spur gear data: diametral pitch=10, addendum=0.1000, root dia.=3.350, max. Tooth thk.=0.15508, meas.Over pins=3.8369, pin dia.=0.1728, testing pressur (oz.)=29-35, center distanceradius=1.7988, max. Tooth-tooth composite error=0.0015, max. Total composite error=0.0041, no. Of teeth(mating gear) =45, nom. Center distance=4.050

Properties:

Body Style
Plain, solid
Spline Quantity
14 both ends
Pitch Diameter
3.6000 inches
Teeth Quantity
36
Bore Style
Involute spline both ends
Spline Pitch Diameter
0.5833 inches both ends
Outside Diameter
3.800 inches
Tooth Form
Standard
Pressure Angle
20.0000 degrees
Distance Between Body Face And Protruding Hub End
0.187 inches both ends
Face Width
0.250 inches
Bore Diameter
0.644 inches both ends
Hub Style Designator
Plain both ends
Hub Diameter
0.3125 inches both ends
Material
Steel comp 4140
Material Specification
Mil-s-5626 military specification single material response
Surface Treatment
Oxide
Surface Treatment Specification
Mil-c-13924, class 1, black military specification single treatment response
Style Designator
Protruding hubs
NSN
3020-01-238-8338
Part Number
HM025-678-1
Description
Gear,spur
CAGE
1T765

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 HM025-678-1 NSN 3020-01-238-8338

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:
A
ESD:
ESD:
MMAC:
CRITL:
X

Packaging & Shipping

Est. Pack Size
Est. Pack Weight
Est. Item Weight
Est. Item Dim.
Pack Size:
--
Paclk Weight:
0.5000lbs
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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