2026-09-10 · News
How to Choose Lead Screw Nut Material? SCREWTECH POM vs PEEK Nuts Comparison
Technical specifications, dimensional drawing and downloadable CAD files for How to Choose Lead Screw Nut Material? SCREWTECH POM vs PEEK Nuts Comparison. Contact SCREWTECH for custom leads, nut types and preload options.
SCREWTECH’s sliding screw series offers two families of engineering-plastic nuts — POM (polyoxymethylene) and PEEK (polyetheretherketone) — each suited to different operating conditions. Below, we compare seven mainstream grades across both families in terms of continuous operating temperature, mechanical properties, friction and wear, and cost, to help engineers select quickly.
The table below covers the mainstream engineering-plastic grades of the POM and PEEK families, corresponding to the optional nut materials of the sliding screw series:
| Performance Dimension | POM-C | POM-H | POM+PTFE | 100%PEEK | PEEK (Glass Fiber Reinforced) | PEEK (30% Carbon Fiber Reinforced) | PEEK (30% Carbon Fiber + Graphite + PTFE) |
|---|---|---|---|---|---|---|---|
| Continuous Operating Temperature | 80℃ | 90℃ | 85℃ | 260℃ | 280℃ | 290℃ | 285℃ |
| Short-Term Temperature Peak | 100℃ | 110℃ | 95℃ | 310℃ | 330℃ | 340℃ | 335℃ |
| Tensile Strength | 62MPa | 70MPa | 55MPa | 90MPa | 170MPa | 210MPa | 180MPa |
| Flexural Modulus (Rigidity) | 2.8GPa | 3.2GPa | 2.5GPa | 3.8GPa | 10.5GPa | 18GPa | 12GPa |
| Friction Coefficient (Unlubricated) | 0.18 | 0.17 | 0.1 | 0.25 | 0.23 | 0.15 | 0.08 |
| Wear Resistance | Good, fatigue-resistant | Excellent, better creep resistance than POM-C | Excellent, outstanding self-lubrication | Good, wear-resistant | Excellent, enhanced wear resistance due to increased strength | Excellent; carbon fiber enhances wear & abrasion resistance | Ultra-excellent; composite filling enables self-lubrication + wear resistance |
| Corrosion Resistance | Resistant to weak acids, weak alkalis and alcohols; not resistant to strong oxidants and aromatic solvents | Same as POM-C, slightly better chemical stability | Same as POM-C | Extremely high; resistant to strong acids, alkalis, high-temperature organic solvents, and salt spray | Same as 100%PEEK; chemical stability remains unchanged after reinforcement | Same as 100%PEEK | Same as 100%PEEK |
| Processability | Easy to inject mold, high molding precision | Slightly more difficult to inject mold, requires precise temperature control | Moderate injection molding difficulty; PTFE tends to precipitate | Difficult; requires specialized high-temperature and high-pressure equipment | Relatively difficult; glass fiber orientation requires mold optimization | Relatively difficult; carbon fiber tends to agglomerate, requiring high shear | Difficult; multi-components tend to disperse unevenly |
| Cost Level | Low | Low - Medium | Medium | High | High - Very High | Very High | Very High |
| Typical Working Condition (Lead Screw Nut) | Normal temperature, low load, general transmission | Normal temperature, medium load, high-precision transmission | Normal temperature, low load, oil-free lubricated transmission | High temperature, medium load, strong corrosion transmission | High temperature, high load, strong corrosion transmission | High temperature, ultra-high load, wear-resistant transmission | High temperature, high load, oil-free lubrication + strong corrosion transmission |
Good / Low / EasyPoor / High / Hard
Selection Guide
General transmission, cost-sensitive → Choose POM nuts (e.g., POM-C / POM-H): high cost-performance and good self-lubrication, suitable for general industrial scenarios.
High temperature, strong wear resistance, clean environment (semiconductor / medical devices) → Choose PEEK nuts (e.g., 100% PEEK / PEEK (Glass Fiber Reinforced)): superior temperature and wear resistance.
Need to further reduce friction → Choose POM+PTFE or PEEK (30% Carbon Fiber + Graphite + PTFE) with modified fillers: lower friction coefficient.
ABOUT SCREWTECH
About Screwtech (SCREWTECH)
Suzhou Screwtech Automation Equipment Co., Ltd. (SCREWTECH) was founded in 2011. As a core technology enterprise focused on the precision linear transmission field, it holds both ISO9001 and IATF 16949 certifications and has accumulated 60+ patents. The company concentrates on independent innovation in micro-precision transmission, serving frontier fields such as semiconductors, medical devices, and new energy, and provides one-stop solutions from core components to integrated modules. Leveraging micron-level precision manufacturing capabilities, Screwtech stands on the main track of domestic substitution to break foreign monopolies, upholds the philosophy of ‘Professional, Integrity, Efficiency’, and is driven by the mission of ‘Lean Transmission, Driving the Future’ to empower high-end manufacturing upgrades.