request for informationIndustrial Brake & Supply
Division of Robert J. Paul Corporation
11617 OLD LEXINGTON PIKE WALTON, KENTUCKY 41094
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Friction Material Selection Chart

This selection chart shows characteristics of the most frequently requested materials.

R = Rigid Molded/Woven   SF = Semi-Flexible   E = Excellent   G = Good   M = Moderate

  Rigid Molded Styles Flexible Molded Styles Woven Styles
Style No. NAF 12 HWK 573 NAF 38 NAF 42 NAF 52 NFC 336 NAR 232 NAR 242 NAF-GGA TFW-GGW HWL 2000 AFT 200
Forms Available:
Block - - - - - -     -     -
Roll             - -   - -  
Flat Sheet - - - - - - - - - -   -
Facings - - - - - - - - - -   -
Custom Fabricated - - - - - - - -       -
Special Molded - - - - -              
Structure R R R R R R SF SF R/SF SF SF R
Coefficient of Friction*
(at 400°, 150 psi, 20 ft./Sec.)
.14
±
.05
0.46
±
.05
0.43
±
.05
0.43
±
.05
0.58
±
.05
0.52
±
.05
0.45
±
.05
0.42
±
.05
0.48
±
.05
0.55
±
.05
0.53 0.39
±
.05
Thicknesses Available 1/8"-2" 1/8"-1.5" 1/8"-2" 1/8"-2" 1/8"-2" 1/8"-5/8" 1/32"-1/2" 1/32"-1/2" 1/32"-1/2" 1/8"-1 1/4" 3/16"-5/8" 1/8"-3"
Type Service Dry Dry Dry Dry Dry/Oil Dry Dry Dry/Oil Dry/Oil Dry Dry/Oil Dry
Rate of Wear E E E G E G G G E G E E
Tensile Strength 2500 PSI 2500 PSI 2800 PSI 2000 PSI 3000 PSI 4600 PSI 1000 PSI 1500 PSI 3500 PSI 2500 PSI 4200 PSI 7200 PSI
Specific Gravity 1.80 2.00 2.00 2.00 2.20 1.9 1.55 1.66 1.60 1.18 1.6 1.6
Max. Rubbing Speed**
(Ft./Min.)
6000 5000 7500 7500 7500 5000 5000 5000 5000 5000 4000 5000
Max. Drum Temp.**
°F for Constant Operation
400 650 600 600 600 500 500 500 500 550 550 600
Max Pressure** (psi) 150 250 150 150 150 500 100 100 100 200 250 450
Product Data Sheet view view view view view view view view view view view view

* Friction values shown are for guide purposes only since values deviate with changes in temperature, pressure and speed. Practical design should include a 25 to 50 percent safety factor.

** Rubbing speed, drum temperature, and pressure are directly related. Changing only one value will change the others. The values shown represent typical conditions, but are not the ultimate limits of the material.

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