Made of polycarbonate, these balls have excellent mechanical characteristics, ensuring remarkable wear and abrasion resistance. They are ideal for applications requiring good corrosion resistance and optimal dimensional stability. However, it should be noted that their durability may be limited by prolonged exposure to UV radiation, and colour variations may occur. Marteau- Lemarie, with 40 years of expertise, offers a stock available in France for quick delivery.
Physical characteristics of polyketone ball (pk)
| Ownership | Value | Unit |
|---|---|---|
| Density | 1.24 | g/cm3 |
| Young Module | 1500 | MPa |
| Thermal expansion coefficient | 110 (T=0-100°C) | × 10−6 /°C |
| Thermal conductivity | 0.3 | W/m·K |
| Volume resistivity | >10^13 | D·m |
| Relative magnetic permeability | <~1 | — |
| Magnetic behaviour | Diamagnetic | — |
| Friction coefficient | 0.27 | — |
| Absorption of moisture (24 h) | 0.5 | % |
Hardness and mechanical strength of polyketone ball (pk)
| Ownership | Value | Unit |
|---|---|---|
| Hardness | 75-85 | Shore D |
| Exercise temperatures | -40/120 | ° C |
| Exercise temperatures | -40/248 | °F |
Available diameters and grades for polyketone ball (pk)
| Parameter | Value |
|---|---|
| Minimum diameter | 1.5 mm — 1/16′′′ |
| Maximum diameter | 100 mm — 4′′ |
| Grades available | 0-I-II-III-IV-V |
Corrosion resistance of polyketone ball (pk)
Good corrosion resistance in contact with aliphatic hydrocarbons, lubricants, oils, greases, petroleum products, saline solutions. Polyketone balls are attacked by strong acids and bases.
Applications of polyketone ball (pk)
Special bearings and pumps are used in the automotive and aerospace sectors, as well as in the chemical, electronic and petroleum industries.
