Model: 8521A

Annular Ball Bearing

Special Features:

Inner ring rounded on both sides 0.060 in. Radius; outer ring chamfered 0n inside 0.031 in. Wide by 60 deg; outer ring rounded on outside 0.060 in. Radius on side with part no. Marking, 0.375 in. Radius on nonmarked side

Properties:

Bore Diameter
35.00 millimeters
Overall Outside Diameter
Between 3.9990 inches and 4.0000 inches
Lubrication Material
Grease
Outer Ring Width
Between 1.1150 inches and 1.1250 inches
Inner Ring Width
21.00 millimeters
Surface Finish
Ground
Retainer Fabrication Method
Pressed
Seal Quantity
2
Bearing Seal Type
Contact
Load Direction
Radial
Bore Shape
Straight
Internal Fit-up Designation
Tight
Standard Tolerance Designation
Abec no.1
Lubrication Material Specification
Alvania 3, fscm 54527 mfr ref single material response
Material
Rubber synthetic seal
Material
Steel ball
Material
Steel inner ring
Material
Steel retainer
Style Designator
Counterbored outer ring, non-separable
NSN
3110-00-953-4495
Part Number
8521A
Description
Bearing,ball,annular
CAGE
0LTL1

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 8521A NSN 3110-00-953-4495

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:
A
ESD:
ESD:
MMAC:
CRITL:
X

Packaging & Shipping

Est. Pack Size
Est. Pack Weight
Est. Item Weight
Est. Item Dim.
Pack Size:
--
Paclk Weight:
2.5000lbs
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: 8482105028
  • SITC: 74610
  • End Use: Industrial machines, other
  • NAICS: 332991
  • USDA: 1

Freight Class: Angular contact ball bearings, nesoi

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