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Common Values Used in Fiberglide Catalog Converted to Metric Units from Imperial Units

Fiberglide Bearing Load Limits:
Static Pressure Limits (Constant)
 
Phenolic Backed:
10,000 psi = 69 N/mm²  
Steel Backed:
30,000 psi = 207 N/mm²  
Dynamic Pressure Limits (Oscillating)
 
Phenolic Backed:
10,000 psi = 69 N/mm²  
Steel Backed:
20,000 psi = 138 N/mm²  
Velocity Limit:
Surface Speed Should be Kept Below 35 ft/min at 10,000 psi  = 0.175 m/s at 69 N/mm²
or 600 ft/min at 100 psi = 3 m/s at 0.69 N/mm²
PV Factor:
Max Continuous PV 60,000 psi-ft/min = 2.07 N/mm²-m/s  
Max Intermittent PV 150,000 psi-ft/min = 5.175 N/mm²-m/s  
Temperature Limit:  
Normal Operating Temperature Should Be Kept Below 300°F = 149°C
Increased Wear Rates May Be Experienced Above 350°F = 177°C
Consult TD Engineering Dept. When Temperature is Below -200°F = -129°C
Mating Surfaces:
Surface Finishes 8 µ in = 0.2 µ m  
16 µ in = 0.4 µ m  
32 µ in = 0.8 µ m  
63 µ in =1.6 µ m  
Running Clearance:
Slight Interferrence Fit Recommended for Oscillating Motion .0005 in = .0127 mm  
Free-Running Fit Recommended for Constant Rotation .0015 in/in of bearing ID = .0015 mm/mm of bearing ID
Test Conditions:
Bearing ID 1.00 in = 25.4 mm  
Bearing Length 0.50 in = 12.7 mm  
Bearing Loads 2,500 lb = 562.5 N  
5,000 lb = 1125 N  
Bearing Pressures 5,000 psi = 34.5 N/mm²  
10,000 psi = 69 N/mm²  
Fiberglide-Fabroid:
A Comparison of FIBERGLIDE and FABROID Bearings with Other Self-Lubricating Types
  Metal-Backed Fiberglide Metal-Backed Fabroid Filled PTFE PTFE Impreg-nated Bronze Oil Impreg-nated Bronze
Typ. Dynamic Load (psi) 2,000 to 10,000 5,000 to 20,000 0 to 500 500 to 3,000 100 to 2,000
Typ. Dynamic Load (N/mm²) 13.8 to 69 34.5 to 138 0 to 3.45 3.45 to 20.7 0.69 to 13.8
Max. Static Load (psi) 30,000 60,000 1) 2,500 20,000 11,000
Max. Static Load (N/mm²) 207 414 17.25 138 75.9
Maximum PV Value (psi-ft/min) 50,000 60,000 10,000 50,000 50,000
Maximum PV Value (N/mm²-m/s) 1.725 2.07 0.345 1.725 1.725
Temperature Range (°F) -320 to +300 -320 to +400 -400 to +500 -320 to +500 -65 to +250
Temperature Range (°C) -196 to +149 -196 to +204 -240 to +260 -196 to +260 -54 to +121
 1) For Low Speed Oscillating Conditions-static loads over 30,000 psi (N/mm²) or dynamic loads over 20,000 psi (N/mm²) require metal backing of high strength stainless steel or equivalent materials.
Bearings-Installation:
Journal Bearings  
Min. Housing Lead-in Chamfer    .050 in = 1.27 mm  
Min. Shaft Lead-in Chamfer    .125 in = 3.175 mm  
or  
Min. Shaft Corner Radius    .060 in = 1.524 mm  
Thrust Bearings  
  Allowable Corner Radius of Stepped
Shafts Through ID of    
 
FTS    .015 in = .381 mm  
LTD    .030 in  = .762 mm  

General Formulas for Metric Conversion of All Imperial Units in Fiberglide Catalog

Measurement Imperial Unit Conversion Factor Metric Unit
Distance in 25.4 mm
Load (Force) lb 0.225 N
Pressure psi 0.0069 N/mm² = MPa
Temperature °F -32 x 5/9 °C
Projected Area in² 645.16 mm²
Surface Velocity ft/min 0.005 m/s
PV psi-ft/min 3.45E-05 N/mm²-m/s
Surface Finish µ in 0.025 µ m
Example: 5,000 psi x 0.0069 = 34.5 N/mm²