| Specification |
Specific Gravity |
Hardness Shore
|
Normal Condition |
Max Temp.
Resistance ° C |
Water Absorption |
Cold Resistance |
Colour |
Polyamide
- A
(Nylon-PA) |
1,13 |
80 (D) |
100° C |
120° C |
3% |
very good |
white |
Hostaform-C
(Delrin-POM) |
1,45 |
80 (D) |
100° C |
140° C |
minimum |
upto -40°
C |
white |
Teflon
(PTFE) |
2,10 |
60 (D) |
260° C |
300° C |
absent |
very good |
white |
GRADES & TOLERANCES
| GRADE |
Sphericity |
Tolerance |
Surface |
| um. |
Micro-Inches |
um. |
Micro-Inches |
|
| I |
12.5 |
500 |
+/-12.5 |
+/-500 |
Polished |
| II |
25.0 |
1000 |
+/-25 |
+/-1000 |
Polished |
| III |
125.0 |
5000 |
+/-125 |
+/-5000 |
Unpolished |
* These characteristics are given by plastic ball manufacturers.
they can differ on the types of production cysle.
CORROSION RESISTANCE CHARTS
| PLASTIC
MATERIAL |
Nylon |
Delrin |
PTFE |
| Acetylene |
+ |
+ |
+ |
| Ethanol |
+ |
+ |
+ |
| Ethelene
Glycol |
+ |
+ |
+ |
| 30%
Ammonia |
+ |
+ |
+ |
| Ammonium
Chloride |
+ |
+ |
+ |
| Arsenic
Acid |
+ |
+ |
+ |
| (Lead
Free) Gasoline |
+ |
+ |
+ |
| High-Test
Gasoline |
+ |
+ |
+ |
| Javel
Water |
- |
- |
+ |
| Hydrochloric
Acid |
- |
- |
+ |
| 30%
Acetic Acid |
- |
± |
+ |
| Natural
Gas |
+ |
+ |
+ |
| Vinegar |
+ |
+ |
+ |
| Greases,
Eatable Oil |
+ |
+ |
+ |
| Formaldehyde |
± |
+ |
+ |
| Fuel
Oil |
+ |
+ |
+ |
| Isopropanal |
+ |
+ |
+ |
| Sea
Water |
+ |
+ |
+ |
| Methanol |
± |
+ |
+ |
| Milk |
+ |
+ |
+ |
| Conc,
Lactic acid |
- |
+ |
+ |
| Mineral
Oil |
+ |
+ |
+ |
| Caustic
Soda |
+ |
± |
+ |
| Ozone |
± |
- |
+ |
| Oil
(Kerosene) |
+ |
+ |
+ |
| Phenol |
• |
- |
+ |
| Phosphoric
Acid |
- |
- |
+ |
| Liquid
Propane |
+ |
+ |
+ |
| Conc,
Nitric Acid |
- |
- |
+ |
| Hydrochloric
Acid |
- |
- |
+ |
| 10%
Hydrochloric Acid |
- |
- |
+ |
| 95%
Foming Sulphuric Acid |
• |
- |
+ |
| Water,
Spring Water |
+ |
+ |
+ |
| hydrogen |
+ |
+ |
+ |
| Tartaric
Acid |
+ |
± |
+ |
| Xylene |
+ |
+ |
+ |
+ = Resisting / ± = Resisting under reserve factor
/ • = Soluble |
