| DATA SHEET FOR POLYMER BEARING MATERIALS | ||||||||||
| Property |
ASTM Test |
Units | PA | AA | NA | FA | QB | QF | MA | |
| USDA/FDA Approval | --- | --- | direct | direct | incidental | direct | incidental | incidental | incidental | |
| Specific Gravity | D-792 | g/cm | .94 | 1.42 | 1.14 | 2.3 | 1.4 | 1.6 | 1.43 | |
|
Impact Strength (notched izod) |
D-256 | ft-lb/in | >25 | 1.4 | 0.9 | 2.5 | 1.1 | .8 | .8 | |
| Tensile Strength (yield) | D-638 | psi | 3,100 | 10,000 | 9,300 | 1,300 | 8,400 | 10,000 | 8,000 | |
| Elongation | D-638 | % | 350 | 30 | 50 | 15 | 6 | 3 | 6 | |
| Shear Strength | D-732 | psi | 3,500 | 9,500 | 10,000 | --- | 2,727 | --- | 11,200 | |
| Compressive Strength | D-695 | psi |
2,400 |
5,200 (1% deflection) |
10,000 (1% deflection) |
2,000 (2.5% deflection) |
5,900 | 22,000 | 15,200 | |
| Hardness | D-785 | Rockwell |
R64 D67 |
R120 M94 |
R109 M57 |
R50 68A |
R128 M105 |
--- D84 |
--- M85 |
|
|
Coefficient of Linear Thermal Expansion |
D-696 | in/in/F | 7.2 x 10-5 | 5.0 x 10-5 | 5.5 x 10-5 | 3.3 x 10-5 | 3.4 x 10-5 | 2 x 10-5 | 2.7 x 10-5 | |
| Thermal Conductivity | C-177 |
BTU/Hr sq ft/F/in |
29 | 1.6 | --- | 2.5 | --- | 2.5 | 3.2 | |
|
Coefficient of Friction (against steel) |
--- |
static dynamic |
.25 .14 |
.15 .2 |
.12 - .21 .13 - .16 |
--- .04 - .20 |
--- .15 |
.17 .08 |
--- .12 |
|
Moisture Absorption
|
D-570 |
% |
<.01 <.01 |
.25 .90 |
1.2 5.3 |
<.35 <1.0 |
<.1 .23 |
.05 .10 |
.19 1.0 |
|
| Max. Continuous Temp. | °F | 170° | 180° | 200° | 500° | 550° | 500° | 650° | ||
|
Max. Intermittent
Use Temp |
°F | 220° | 220° | 300° | 550° | 650° | 550° | 850° | ||
| Minimum Use Temp | °F | cryogenic | -40° | -40° | -40° | cryogenic | cryogenic | cryogenic | ||
| Max. Recommended PV |
(lb) (ft) (in) (min) |
<1,000 | <2,000 | 6,000 | 6,000 | 50,000 | 60,000 | 110,000 | ||