Productscpzx
1. Product Introduction
POM-H, or homopolyacetal, is a high-crystallinity thermoplastic engineering plastic and a core polymer material for mechanical transmission and precision structural applications. The POM-H machined parts introduced here are non-standard precision structural and transmission components custom-manufactured from premium imported/domestic homopolyacetal sheets, rods and tubes via precision machining processes including CNC lathe turning, CNC engraving, milling, drilling, chamfering and polishing.
Compared with conventional copolymer POM, POM-H homopolyacetal features higher density, greater rigidity and superior surface finish. The finished parts deliver excellent dimensional stability, burr-free surfaces and high flatness. They can fully replace selected copper, steel and aluminum metal components to achieve equipment lightweighting, noise reduction and cost saving, and are widely used for non-standard custom applications of various precision machinery.
2. Physical & Chemical Properties
POM-H homopolyacetal machined parts exhibit outstanding comprehensive physical and chemical performance with prominent wear resistance, fatigue resistance and solvent resistance. It ranks among engineering plastics with the most balanced mechanical properties. The detailed properties are listed below:
Property Category
Specifications & Description
Basic Physical Properties
Density: 1.43g/cm?; extremely low water absorption (0.25%), excellent dimensional stability. High hardness, smooth surface, low friction coefficient and excellent self-lubrication. Resistant to wear and deformation; finished parts feature high flatness and precision.
Mechanical Properties
Excellent tensile strength, flexural strength and impact resistance. High rigidity and outstanding fatigue resistance. Able to withstand reciprocating motion, high-frequency friction and alternating loads for long-term service, resistant to fracture and deformation under repeated bending and mechanical impact.
Temperature Resistance
Continuous operating temperature: -40℃ ~ 80℃; short-term peak temperature up to 100℃. Maintains good toughness at low temperatures without brittleness; dimensions remain stable under alternating high/low temperature conditions.
Chemical Corrosion Resistance
Resistant to weak acids, weak alkalis, lubricating oils, hydraulic oils, gasoline, diesel fuel, alcohol and other common organic solvents & industrial media. Insoluble in most solvents at ambient temperature with good anti-corrosion and anti-aging performance. Not resistant to strong acids, strong oxidants and high-temperature strong alkalis.
Insulation & Weather Resistance
Good electrical insulation and stable dielectric properties, meeting general electrical insulation requirements. Resists aging and mildew indoors, less prone to yellowing or cracking in long-term indoor use. Susceptible to aging under prolonged outdoor UV exposure; protective enclosure is required for outdoor applications.
Machinability
Easy to cut, drill and polish, suitable for CNC precision machining. Burr-free high-precision finished parts, supporting custom fabrication of complex irregular profiles, ultra-thin structures and high-tolerance dimensions.
3. Typical Application Fields
Benefiting from core advantages including high wear resistance, low noise, high rigidity, self-lubrication and corrosion resistance, POM machined parts are widely adopted in machinery transmission, automation equipment, intelligent systems, medical devices and many other industries with remarkable metal-replacement performance:
Industry
Application Products & Scenarios
Automated Machinery
Gears, sprockets, rollers, linear guide sliders, limit blocks, fixing brackets, transmission connecting rods, eccentric wheels, buffer pads and other precision transmission & positioning parts for automated production lines
Electrical & Electronic Equipment
Electrical insulating structural parts, wear-resistant switch components, precision positioning shims, small transmission parts for electronics, shock-absorbing wear-resistant brackets and built-in housing structural components
Medical Equipment
Wear-resistant sliders, positioning fittings, sterile structural parts and small transmission components for medical devices. Non-toxic, odorless, corrosion-resistant and easy to clean, suitable for hygienic medical environments
Food Packaging Machinery
Machinery Wear-resistant gears, conveying rollers, cutter pads, positioning jigs and transmission parts for food machinery. Oil-resistant, easy to clean and free of metal particle contamination
Automotive Components
Wear-resistant interior parts, door & window transmission small parts, wiper transmission structures, miniature gear assemblies, shock-absorbing wear shims and pipeline fixing clips
Hardware & Precision Machinery
Precision mold pads, wear-resistant bushings, shaft sleeves, bearing retainers, small precision gears and non-standard irregular wear-resistant structural parts
4. Selection & Design Guidelines
POM-H machined parts are non-standard custom components without fixed standard models. They can be manufactured according to customer drawings, samples and dimensional requirements. Below is the reference of common raw material specifications together with design guidelines to support preliminary selection and structural design.
4.1 Reference of Standard Raw Material Specifications
Raw Material Type
Common Dimension Range
Machining Tolerance
Application Scenarios
POM-H Sheet
Thickness: 2mm-100mm; standard sheet size 1000*2000mm
±0.02mm precision tolerance
Sliders, pads, brackets, flat structural parts, irregular plate components
POM-H Rod
Diameter: 3mm-200mm; length 1000mm
±0.01mm precision tolerance
Bushings, gears, pin shafts, cylindrical transmission parts, irregular turned components
POM-H Tube
Inner diameter:5mm-150mm; wall thickness 2mm-30mm
±0.03mm precision tolerance
Wear-resistant liners, sleeves, hollow transmission fittings
4.2 Core Guidelines for Selection & Design
4.2.1 Working Condition Selection: POM-H (homopolymer) is preferred for high-frequency friction and reciprocating transmission scenarios, featuring superior wear resistance and rigidity compared with copolymer POM. It can also be used for static positioning and general supporting applications.
4.2.2 Dimensional Design Suggestion: The thickness of thin-wall structures should be ≥1.5mm to avoid cracking during machining. For slender shafts, the length-to-diameter ratio is recommended ≤20:1 to guarantee structural stability.
4.2.3 Tolerance Matching: General equipment parts: ±0.05mm; precision transmission parts can reach ±0.01mm~±0.02mm, customizable according to equipment accuracy requirements.
4.2.4 Structure Optimization: Avoid sharp corners; chamfers or fillets are recommended to reduce stress concentration and extend service life.
5. Operation & Maintenance
5.1 Precautions for Use
? POM-H has limited high-temperature resistance. Long-term service above 100℃ is forbidden to prevent material softening, deformation and deterioration of mechanical performance.
? Long-term contact with concentrated nitric acid, concentrated sulfuric acid, strong oxidants and other corrosive media must be avoided, which may cause cracking, powdering and component failure.
? For high-speed friction and heavy-load transmission applications, lubricating grease is recommended to further reduce wear, lower running noise and extend service life.
? Protective housing is required for outdoor installation to prevent aging, embrittlement and cracking caused by long-term UV radiation.
5.2 Routine Maintenance
? Cleaning: Wipe surface dust and oil regularly with clean water or anhydrous alcohol. Do not use strong acid or strong alkaline cleaners.
? Periodic Inspection: Check wear of POM transmission parts monthly. Replace components promptly if obvious wear, looseness or jamming occurs to prevent equipment malfunction.
? Storage: Uninstalled machined parts should be stored in dry, cool and ventilated places, away from sunlight, humidity and compression to avoid deformation and aging.
? Assembly: Avoid violent knocking during assembly to prevent edge chipping and cracking. Align and install accurately to ensure smooth transmission.
6. Development Trend
With rapid popularization of automation equipment, intelligent manufacturing and lightweight machinery, replacing metal with precision engineering plastics has become a mainstream industry trend, bringing stable opportunities for the POM-H machined parts sector.
6.1 Precision & Miniaturization: Demand for small-size, high-precision, low-tolerance custom POM parts keeps growing for smart equipment and precision instruments. CNC high-speed cutting and 5-axis machining are widely adopted, greatly improving product precision and consistency.
6.2 Material Modification Upgrade: Traditional neat POM-H is evolving toward wear-modified, anti-aging, anti-static and flame-retardant grades to meet demanding requirements in electronics, new energy and high-end medical industries.
6.3 Lightweight & Cost Reduction: Without sacrificing equipment performance, POM-H machined parts replace copper, aluminum and steel components to reduce equipment weight, cut noise and lower production & maintenance costs, becoming a preferred cost-saving solution for machinery manufacturers.
6.4 Customization & Intelligent Production: The integrated model of non-standard customization, rapid prototyping and mass standardized production becomes mainstream, satisfying personalized component demands of small & medium machinery enterprises.
7. Market Application Expansion
Currently, POM-H precision machined parts have been widely adopted in traditional machinery, electronics, automotive and packaging equipment industries, while continuously expanding into emerging sectors with growing market potential.
? New Energy Industry: Applied for transmission parts of new energy equipment, positioning jigs for battery production lines and insulating wear-resistant structural parts. Its insulation, wear resistance and corrosion resistance meet high-precision and high-stability operation requirements of new energy equipment.
? Intelligent Logistics & Warehousing: POM-H machined parts are widely used for AGV gears, rollers, slide rail components and sorting machine wear parts, enabling low-noise, long-life and maintenance-free equipment operation.
? High-end Medical & Food Industry: Demand for sterile wear-resistant parts for food automation and medical inspection equipment is rising. Non-toxicity, easy cleaning and zero metal contamination fit strict industry standards.
Meanwhile, export markets keep expanding. With high cost-performance, non-standard precision POM machined parts are exported to Southeast Asia, the Middle East, Europe and other regions, serving as core export products in the precision plastic machining industry.
8. Conclusion
With the combined advantages of high wear resistance, high rigidity, low noise, corrosion resistance, stable dimensions and favorable cost performance, POM-H homopolyacetal precision machined parts are core non-standard precision mechanical components. Supported by precision CNC machining, complex structures and high-precision dimensions can be custom-produced to suit automation equipment, electrical appliances, automotive, medical, food machinery and other industries. They effectively replace traditional metal parts to realize lightweight, low-noise and low-cost equipment upgrading.
Driven by intelligent manufacturing and equipment lightweight upgrading, application scenarios of POM-H machined parts will keep expanding with steady market demand. In the future, with upgraded precision machining and iterative material modification technology, custom POM-H machined parts will develop toward higher precision, enhanced performance and more segmented application scenarios. They deliver reliable component support for stable operation and cost reduction of all types of machinery, ranking as highly cost-effective and practical core products among industrial non-standard precision fittings.
