1. POM (Polyoxymethylene) Plastic Balls
- Delrin POM balls
- Diameter: 1.5mm-160mm
- Precision grade: G0-G3
- Color: White, Black, Natural.
- High Rigidity & Wear Resistance: Low friction coefficient (0.1-0.3), ideal for high-speed rotating parts.
- Dimensional Stability: Water absorption ≤0.25%, minimal deformation under temperature/humidity changes.
- Temperature Range: -40°C to +100°C (short-term up to +140°C).
- Applications: Precision POM bearing balls, Precision gears, bearings, printer rollers, valve components.
Mechanical Properties
| Hardness (Rockwell) | Tensile Strength | Density | Chemical Resistance |
|---|---|---|---|
| R110-120 | 60-70 MPa | 1.41 g/cm³ | Resists hydrocarbons, weak acids/alkalis; avoid strong acids/oxidizers. |
2. PP (Polypropylene) Plastic Balls
- Diameter：1.5mm-100mm
- Precision grade: G0-G3
- Color Options: Natural, White, Black, Custom Colors
- Lightweight & Corrosion-Resistant: Density 0.90-0.91 g/cm³, resists acids, alkalis, and solvents (HCl/H₂SO₄ ≤50%).
- Food-Grade Safety: FDA/EC1935 compliant, non-toxic, odorless.
- Low-Temperature Toughness: Brittle point as low as -20°C.
- Applications：Food processing equipment, chemical pump floats, toys, low-cost light-duty bearings.FDA-approved PP plastic balls
Mechanical Properties
| Hardness (Shore D) | Tensile Strength | Temperature Range |
|---|---|---|
| 60-70 | 25-35 MPa | -20°C ~ +100°C |
3. PA (Nylon) Plastic Balls
- Diameter：1.588mm-80mm
- Precision grade:G0-G3
- Color Options: Natural, Custom color.
- High Impact Resistance: Excellent toughness (notched impact strength ≥5 kJ/m²).
- Self-Lubricating: Oil-filled variants (PA66+MoS₂) reduce friction to 0.15.
- Fatigue Resistance: Long lifespan under cyclic loads, metal replacement potential.
- Application:Automotive wiper bearings, textile machinery guides, sports equipment pulleys,impact-resistant nylon balls.
Mechanical Properties
| Hardness (Shore D) | Tensile Strength | Density | Water Absorption |
|---|---|---|---|
| 70-80 | 80-90 MPa | 1.14 g/cm³ | 1.5-3% |
4. PTFE (Polytetrafluoroethylene) Plastic Balls
- Teflon balls
- Diameter: 1mm-100mm
- Precision grade: G0-G3
- Color Options: White, Natural.
- Chemically Inert: Resists strong acids (conc. H₂SO₄, aqua regia), alkalis, and solvents.
- Ultra-Low Friction: Coefficient 0.04-0.1, self-lubricating with zero maintenance.
- Temperature Range: -200°C to +260°C (continuous use).
- Applicants：Chemical valve seals, semiconductor equipment guides, medical catheter components,low-friction PTFE valve balls and etc,.
Mechanical Properties
| Hardness (Shore D) | Tensile Strength | Density | Compressive Strength |
|---|---|---|---|
| 50-60 | 15-30 MPa | 2.15 g/cm³ | 12-15 MPa |
Comparison & Selection Guide
| Material | Best For | Limitations |
|---|---|---|
| POM | Precision, wear resistance | Avoid strong oxidizers |
| PP | Lightweight, food-safe | Limited temperature range |
| PA | Impact resistance | High moisture absorption |
| PTFE | Chemical resistance | Low mechanical strength |
