1. Product Introduction

POM-C stands for copolymer polyoxymethylene. POM-C machined parts are engineering plastic components manufactured from POM-C rods or sheets via CNC turning, CNC milling, precision grinding and other precision machining processes. Typical products include flanged bushings, straight sleeves, flat gaskets and sliding support components.

Production process: Raw virgin POM-C stock → Precision CNC cutting & forming → Deburring and surface finishing → Full dimensional inspection. Custom fabrication is available according to customer drawings or samples, covering small-batch sampling to mass production. Finished products feature high dimensional accuracy and smooth surface, suitable for various oil-free sliding transmission applications.

 

2. Physical & Chemical Properties

Category	Item	Specification & Description
Mechanical Properties	Density	1.41 g/cm³
	Tensile Yield Strength	65~70 MPa. High rigidity and creep resistance, low deformation under long-term load
	Friction & Wear	Low friction coefficient with inherent self-lubrication; low wear loss under reciprocating motion
	Impact Resistance	Better toughness than homopolymer POM (POM-H), resistant to cracking at low temperatures
Thermal Properties	Continuous Service Temperature	-40℃ ~ +100℃, short peak temperature up to 110℃
	Melting Point	160~170℃. Sustained temperature exceeding continuous service limit accelerates aging
Chemical Resistance	Medium Compatibility	Resistant to lubricants, grease, weak acids & alkalis and most organic solvents; NOT resistant to strong oxidants and concentrated strong acids
Electrical Properties	Insulation Performance	Good insulation with stable dielectric properties, ideal for low-voltage insulating structural parts
Dimensional Performance	Dimensional Stability	Minimal dimensional change under temperature and humidity variation; low post-machining deformation
Water Absorption	Saturated Water Absorption	~0.8%. Far less swelling than polyamide materials

3. Typical Application Fields

Industry	Components	Functions
Automation & Packaging Machinery	Guide bushings, joint sleeves, wear-resistant gaskets for conveying systems	Oil-free self-lubrication, reduces friction of transmission parts and lowers maintenance frequency
Automotive Components	Sliding bushings for window lifters and seat assemblies	Low-noise reciprocating sliding, grease resistance, lightweight replacement for metals
Construction Machinery	Flanged hinge bushings, wear isolation gaskets	Withstand alternating loads, anti-wear, buffer metal contact and reduce noise
Fluid Pump & Valve Equipment	Pump support sleeves, valve seat gaskets	Oil & medium resistance, stabilizes moving components and prevents jamming
Medical Equipment (Medical Grade Raw Material)	Instrument handles, sliding parts for drug delivery devices	Stable dimension, resistant to common disinfectants for precision transmission
Electronics & Electrical	Low-voltage insulating sleeves, gear shims	Insulation and wear resistance for stable operation of precision mechanisms
Food Machinery (Food-Grade Grade)	Roller sleeves, wear-resistant guide parts	Resistant to cleaning detergents, compliant with food contact safety requirements

4. Selection & Design Guidelines

Basic Selection Principles

Customers shall confirm 5 core parameters first: inner diameter, outer diameter, total component height, flange thickness and flange outer diameter. Meanwhile, define working conditions: radial load, sliding linear speed, operating temperature, contact medium and whether long-term oil-free operation is required.

• High-speed sliding: Prefer finely machined low-roughness version to reduce frictional heat buildup.

• Heavy static load: Increase wall thickness properly to reduce surface pressure.

• Low-temperature outdoor use: Virgin POM-C material is mandatory; recycled material products are prohibited.

Standard Reference Dimensions (Flanged POM-C Bushings)

Model	Inner Diameter (mm)	Outer Diameter (mm)	Total Height (mm)	Flange OD (mm)	Flange Thickness (mm)
POM-C-F06	6	10	12	16	2
POM-C-F10	10	14	16	22	2.5
POM-C-F16	16	22	20	30	3
POM-C-F20	20	26	25	36	3
POM-C-F30	30	38	30	48	4
POM-C-F40	40	50	35	60	4

Matching POM-C flat gaskets: Inner diameter Φ6~Φ40mm, outer diameter Φ12~Φ70mm, thickness 1~5mm, can be freely combined with flanged bushings.

Note: Non-standard sizes are customizable, tolerances can follow customer drawing requirements.

 

5. Usage & Maintenance

During assembly, do not hammer the part forcibly, which may cause inner hole deformation or flange chipping. Uniform static pressing is recommended. Reserve proper sliding clearance: too small clearance leads to frictional heat and jamming, while excessive clearance triggers vibration and accelerated wear.

Not suitable for long-term service in concentrated nitric acid or strong oxidizing agents, which may cause cracking and degradation of POM-C. Keep continuous working temperature below 100℃ to avoid accelerated aging.

For daily maintenance, keep mating metal surfaces clean. Sand and hard particles entering friction pairs will sharply increase wear and shorten service life. No extra grease is required under oil-free working conditions; compatible lubricant can be applied in heavy-load scenarios. Carry out periodic inspection. Replace parts promptly when abnormal noise or excessive clearance occurs, to prevent damage to matched metal shafts.

 

6. Development Trend

6.1 Modified material upgrading: Filled modified POM-C materials are gaining popularity. Adding glass fiber or solid lubricants further improves load capacity and wear resistance for heavy-duty industrial applications. Bio-based and recyclable POM-C raw materials are under continuous R&D to meet global low-carbon and carbon neutrality requirements.

6.2 Machining upgrade: Integrated CNC precision machining with online automatic inspection achieves micron-level stable tolerance control, meeting ultra-high precision component demands for high-end equipment and medical devices.

6.3 Lightweight metal substitution: More industries adopt POM-C machined parts to replace copper, bronze and other metal bushings, lowering overall equipment weight, raw material cost and lubrication maintenance demand.

6.4 Development of specialized grades: Food-contact grade, medical sterilizable grade, UV-resistant outdoor grade and other dedicated POM-C materials keep expanding the scope for special working conditions.

 

7. Market Expansion

Domestically, industrial automation, new energy equipment and construction machinery are core growth sectors. Demand for POM-C bushings on robot joints, conveying equipment and hydraulic hinge components keeps rising.

Overseas, European, Southeast Asian and South American packaging machinery & agricultural machinery markets show strong demand for wear-resistant plastic sleeves and gaskets. We can leverage custom machining strengths to develop B2B equipment manufacturers.

New expansion directions: Wear-resistant small transmission parts for renewable energy equipment (photovoltaic, wind power), sliding liners for rail transit, isolation wear parts for mild marine corrosion environments. We also provide package solutions combining POM-C bushings and gaskets for one-stop delivery to improve customers’ procurement efficiency.

For market strategy, develop industry-specific component kits for different sectors, and supply material test certificates and material certifications to satisfy overseas customers’ customs and equipment certification requirements.

 

8. Summary & Conclusion

POM-C precision machined bushings and gaskets feature self-lubrication, excellent wear resistance, creep resistance, stable dimension, oil and weak corrosion resistance. As high-performance oil-free sliding components, they serve as preferred engineering plastic alternatives for traditional metal bushings.

With mature CNC precision machining capability, we can custom-make various flanged bushings, sleeves and gaskets for precision sliding support across automation, automotive, construction machinery, medical and other industries.

Driven by market demand for lightweight and maintenance-free equipment, the market potential of POM-C machined parts continues to expand. Proper material selection and standardized assembly & maintenance can maximize material performance, helping customers reduce equipment operation & maintenance cost, cut downtime loss and achieve long-term stable and efficient equipment operation.