Product Description
POM Knurled Ball Bead: Brief Introduction
1. Product Overview
POM knurled ball beads are precision transmission components made from polyoxymethylene (POM) engineering plastic. Featuring a surface knurling process to enhance grip and anti-slip performance, they combine near-metallic strength and rigidity with self-lubricating and wear-resistant properties. Ideal for frequent adjustments or high-precision transmission, the knurled design ensures stable operation even in oil-free environments.
2. Key Features
Ultra-Wear Resistance & Low Friction
Dynamic friction coefficient: 0.10–0.20; wear volume as low as 2mg (ASTM D1044).
Solid lubricants (e.g., MoS₂ or silicone oil) enable "self-lubrication," minimizing external lubrication needs.
High Mechanical Strength & Fatigue Resistance
Tensile strength: 62–75 MPa; flexural modulus: 2200–3800 MPa (close to aluminum alloys).
Fatigue strength retention >95% after 10⁷ test cycles, suitable for high-frequency adjustments.
Chemical Resistance & Dimensional Stability
Resists 98% industrial solvents (e.g., ketones, weak acids/bases); water absorption: 0.15–0.25%.
Heat deflection temperature: 100–136°C (under 1.82 MPa load), stable across wide-temperature ranges.
Knurling Benefits
Diamond or straight knurling boosts friction for slip-free manual rotation.
Ergonomic grip design prevents operational failure.
3. Application Scenarios
Precision Instruments
Microscope focus knobs, optical device alignment beads (leverages dimensional stability + anti-slip grip).
Industrial Transmission
Valve handwheels, conveyor tensioners (maintains low-wear operation under high loads).
Automotive Controls
Seat adjusters, steering wheel beads (resists oil/grime and thermal fluctuations).
Consumer Devices & Medical Tools
Juicer pressure knobs, respiratory valve beads (FDA-compliant grades like KEPITAL® C20-80).
4. Summary
POM knurled ball beads deliver high rigidity + self-lubrication + anti-slip control, overcoming corrosion and frequent lubrication needs of metal beads. With >2x longer wear life vs. standard POM and operational range of -40°C to 100°C, they are optimal for precision transmission, manual adjustment, and oil-free environments.
