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NPB 104NU48 Bearing Inch Series | Self-Lubricating Bearing

NPB Part No.
104NU48

Specifications

Dimensional Diagram
Inch or Metric
Inch
Lubrication
Self-lubricating
Bearing Length
3"
Nominal Bearing Bore
6 1/2"
Recommended Shaft Diameter
6.5000 - 6.4975"
Recommended Housing Diameter
6.6858 - 6.6874"
Installed Bearing Inside Diam.*  ID
6.5002 - 6.5070"
Flanged
No
Materials
  • Liner: PTFE-lead overlay
  • Substrate: Sintered bronze
  • Backing: Plated low-carbon steel
Loads - P
  • Dynamic loads up to 20,000 PSI
  • Static loads up to 36,000 PSI
  • Compressive yield strength of 44,000 PSI
Speed - V
  • Up to 1000 FPM unlubricated
  • Up to 2000 FPM lubricated
Performance - PV
  • PV to 50,000 PSI - FPM - continuous operation
  • PV to 100,000 PSI - FPM - intermittent operation
Temperature Range
–328°F to +536°F
Coefficient of Friction
0.02 - 0.20 Static/Dynamic
Shaft Finish
  • A surface finish of better than 16 micro inches is recommended
  • Above 32 micro inches, bearing life is reduced by more than 50%
* When installed in a rigid steel or cast-iron housing
Length Tolerances: Up to and including 3/8 inch I.D. or length – ±0.015 inch. Above 3/8 inch I.D. or length – ±0.010 inch

Interchange

National Precision Bearing Part No 104NU48 is an interchangable replacement for these common bearing part numbers:

Isostatic Bearing
104TU48
Garlock Bearing
104DU48