Model: KP21BS

Airframe Ball Bearing

Special Features:

80 pct full of specified grease, 0.0003 in. To 0.0010 in. Radial clearance, 6.5 degrees self alignment in either direction

Properties:

Bore Diameter
1.3130 inches
Overall Outside Diameter
2.2500 inches
Lubrication Material
Grease
Outer Ring Width
0.3750 inches
Inner Ring Width
0.4370 inches
Seal Quantity
2
Bearing Seal Type
Contact
Alignment Type
Self-aligning
Load Direction
Radial
Self-alignment Location
External
Features Provided
Aligning ring
Standard Tolerance Designation
Afbma standard tolerance for airframe ball bearings
Lubrication Material Specification
Mil-g-81322 military specification single material response
Material
Plastic polytetrafluoroethylene seal or plastic seal
Material
Steel comp e52100 ball or steel comp e51100 ball
Material
Steel comp e52100 inner ring
Material
Steel comp e52100 outer ring
Material Specification
Ams 3652 assn standard 1st material response seal or ams 3666 assn standard 2nd material response seal
Surface Treatment
Cadmium exposed surfaces as mounted
Style Designator
Single row, external self aligning, w/aligning ring
NSN
3110-00-508-3051
Part Number
KP21BS
Description
Bearing,ball,airframe
CAGE
21335

A cylindrical item in which the inner or outer ring turns upon row(s) of hardened ball, bearing which roll on a raceway, thus minimizing friction. These items are characterized by their noncorrosive qualities, lightness of weight, inch dimensions rather than metric, inner rings generally projecting beyond the faces of the outer ring, or a very narrow width inner ring having an outside diameter slightly larger than the bore diameter. Designed primarily for use in aircraft assemblies, such as control systems and surfaces of aircraft. Excludes bearing, ball, annular.

Part KP21BS NSN 3110-00-508-3051

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
00041
FIIG:
A044A0
Concept No.:
App. Key:
B
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:
0.3000lbs
Item Weight:
--
Item Dim:
--
OPI
SPI No.
SPI Rev.
SPC Mkg.
LVL A
LVL B
OPI:
M
SPI No.:
SPI Rev.:
SPC Mkg:
51
LVL_A:
E
LVL_B:
Q

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
114820
UFC:
58860
LTL:
77.5
LCL:
--
WCC:
742
TCC:
Z
SHC:
9
ACC:
Trailers/Vehicles

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Schedule B and Export
  • Schedule B: 8482105068
  • SITC: 74610
  • End Use: Industrial machines, other
  • NAICS: 332991
  • USDA: 1

Freight Class: Ball bearings, nesoi

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