Model: SK291

Annular Ball Bearing

Special Features:

Seal w/synthetic rubber ring in setscrew side; od of inner ring shouldered to a diameter of 4.0000 in onside opposite setscrew; lubricant hole in od of aligning ring and od of outer ring; furnished w/ 0.2500 in. Countersunk plug and 0.3125 in. By 1.6870 in lg lock pin; selected, classified and tested by the assembly mfr at his plant

Properties:

Bore Diameter
Between 3.4375 inches and 3.4383 inches
Overall Outside Diameter
Between 6.2790 inches and 6.2800 inches
Lubrication Material
Grease
Outer Ring Width
2.0620 inches
Inner Ring Width
Between 4.0575 inches and 4.0625 inches
Surface Finish
Ground
Seal Quantity
2
Bearing Seal Type
Labyrinth
Alignment Type
Self-aligning
Load Direction
Radial
Bore Shape
Straight
Internal Fit-up Designation
Standard
Self-alignment Location
External
Lubrication Material
Grease
Lubrication Material Specification
Dod-g-24508 military specification single material response
Material
Copper alloy alignment ring
Material
Steel ball
Material
Wool seal and rubber synthetic seal
Material
Steel inner ring
Material
Steel outer ring
Material
Steel retainer or copper alloy retainer
Material
Steel or copper alloy retainer
Material
Wool and rubber synthetic seal
Style Designator
Single row ball, external aligning ring, inner ring extended both sides, with setscrew in inner ring
NSN
3110-00-627-1194
Part Number
SK291
Description
Bearing,ball,annular
CAGE
63504

A cylindrical device in which the inner or outer ring turns upon a single or double row of hardened balls which roll easily between the two rings, thus minimizing friction. For items with faces specially ground for duplex mounting see bearing, ball, duplex. Excludes bearing, ball, airframe.

Part SK291 NSN 3110-00-627-1194

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
00014
FIIG:
A044A0
Concept No.:
App. Key:
C
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:
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: 8482105028
  • SITC: 74610
  • End Use: Industrial machines, other
  • NAICS: 332991
  • USDA: 1

Freight Class: Angular contact ball bearings, nesoi

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