Model: 451744

Cylindrical Roller Bearing

Special Features:

Retainer silver plated per ams 2412 inner ring and outer ring marked w/same serial no., surface finish--land surface finish 20 microinches aa, stabilized for operation to 400 degrees f, three slots equally spaced on one face of outer ring 0.4700 in. Min, 0.5300 in.Max w, 0.0500 in. Min, 0.0600 in. Max depth

Properties:

Overall Width
21.0 millimeters
Bore Diameter
55.0 millimeters
Overall Outside Diameter
100.0 millimeters
Surface Finish
Ground
Retainer Fabrication Method
Machined
Bore Shape
Straight
Locating Feature
Nonlocating
Internal Clearance
0.0021 inches radial and 0.0031 inches radial
Standard Tolerance Designation
Rbec no.5
Material
Copper alloy retainer
Material
Steel inner ring
Material
Steel outer ring
Material
Steel roller
Material Specification
Fed-std-66 federal standard single material response inner ring
Material Specification
Fed-std-66 federal standard single material response outer ring
Material Specification
Fed-std-66 federal standard single material response roller
Material Specification
Sb2154-1, 78286 mfr ref single material response retainer
Style Designator
252a single row, non-locating, two lip inner ring, cylindrical outer ring, separable
Test Data Document
81349-mil-i-6868 specification (includes engineering type bulletins, brochures, etc., that reflect specification type data in specification format; excludes commercial catalogs, industry directories, and similar trade publications, reflecting general type data on certain environmental and performance requirements and test conditions that are shown as "typical", "average", "", etc.).
NSN
3110-00-938-3226
Part Number
451744
Description
Bearing,roller,cylindrical
CAGE
52676

A nonadjustable roller bearing consisting of a single or multiple-row of hardened cylindrical rollers and a retainer used with or without inner or oute r rings. Excludes bearing, roller, airframe.

Part 451744 NSN 3110-00-938-3226

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
00015
FIIG:
A044A0
Concept No.:
App. Key:
L
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:
77.5
WCC:
742
TCC:
Z
SHC:
9
ACC:
Trailers/Vehicles

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Schedule B and Export
  • Schedule B: 8482500000
  • SITC: 74650
  • End Use: Industrial machines, other
  • NAICS: 332991
  • USDA: 1

Freight Class: Other cylindrical roller bearings

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