Engineering Plastic POM: Properties, Applications, and Manufacturing Advantages

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“Get to know engineering plastic POM, its properties, applications, wear resistance, advantages in machining, and benefits in industrial manufacturing.”

Introduction

Among the precision mechanical components, engineering plastic POM is one of the most used. It’s employed whenever low friction, high wear resistance, dimensional stability, and long-lasting durability are required. POM is an excellent material for moving mechanical components, gears, bearings, and sliders and is essential for the industries that use them.

What is engineering plastic POM?

POM is a high-performance thermoplastic engineering material, which is commonly referred to as Polyoxymethylene. It is also commonly known as Delrin, a commercially used brand name by many manufacturers.

POM is popular for combining:

• High mechanical strength
• Excellent wear resistance
• Low-friction performance
• Good dimensional stability
• Self-lubricating characteristics

POM can be cut accurately with a machine and can be used for CNC cutting and industrial manufacturing.

Core Characteristics Of POM Material

Some main POM material characteristics are as follows:

• POM is a highly recognized engineering plastic, with a good balance of strength, wear and dimensional stability. 
• Its self-lubricating surface is one of its best features because it reduces friction and allows moving parts to run smoothly. This property reduces wear in mechanical systems and hence reduces maintenance. 
• POM is also highly rigid and resistant to fatigue, making it an ideal material for parts that are subjected to continuous motion and repeated stress. 
• It has a very low moisture absorption rate, so it keeps the dimensions and performance stable for a long time. 

These properties qualify POM as a good material for precision engineering.

Mechanical and Thermal Properties Of POM

Mechanical Strength

POM is very stiff and rigid when compared to a lot of engineering plastics. They have the following important mechanical advantages:

• High tensile strength
• Good impact resistance
• Strong fatigue resistance
• Excellent creep resistance

It makes it possible to resist continuous mechanical load on POM parts.

Thermal Performance

POM is suitable for medium temperatures in the industrial environment.

• The typical range of operating temperature is -40°C to 100°C
• Some grades can support higher temperatures for a short period of time

It also has a high resistance to repeated thermal cycling.

Low Moisture Absorption

POM absorbs a lot less moisture than nylon materials. It helps maintain:

1. Stable dimensions
2. Better precision
3. Consistent mechanical properties

This is especially important for precision mechanical assemblies

Common Types Of POM Materials

POM materials are primarily offered in two forms

1. Homopolymer POM 
2. Copolymer POM

Homopolymer POM offers greater stiffness, hardness, and mechanical strength and is best used in applications where high load and high rigidity are required. 

Copolymer POM, however, has better chemical resistance and greater thermal stability in challenging industrial applications. Machining requirements, environmental exposure, and mechanical performance requirements vary based on the type of POM that is chosen by the manufacturer. 

In some special grades, additional ingredients are added for increased UV stability, reduced friction, or greater wear resistance.

The main applications of the Engineering Plastic POM

The main applications of the engineering plastic POM are as follows:

1. Engineering plastic POM is widely used in various industries where precision, durability, and low-friction movement are key requirements. 
2. The material is used widely in gears, bearings, sliders, bushings, and conveyor components due to good performance when subjected to continuous mechanical motion. 
3. POM is employed in automotive components like fuel systems. components, locking systems and window mechanisms owing to its strength and dimensional stability. 
4. The material is also popular in electrical devices, industrial machinery, consumer products, and automation equipment. 
5. It is also extremely useful in mechanical engineering due to its resistance to wear and ability to maintain smooth movement.

POM Vs HDPE

Both POM and HDPE are commonly used engineering plastics, with each having its own industrial applications. POM has greater strength, rigidity, and dimensional stability than HDPE. It is also used in precision mechanical friction/wearing applications with improved performance.

However, HDPE offers greater chemical resistance and lower material cost and is ideal for less demanding applications. POM is typically the more robust and durable material for gears, bearings, sliders, and mechanical structural parts.

POM Vs. Other Engineering Plastics

Expert Tips For Using POM In Manufacturing

Here are some tips for working with POM in manufacturing.

In manufacturing with POM, the right choice of material and the correct machining techniques are significant for the long-term performance. The POM stress-relieved grades provide a reduction of warping and dimensional changes after machining, particularly in precision components. 

The use of sharp cutting tools and proper cutting speed of the machine to avoid excessive heat buildup during the processing should be paid attention to by the manufacturers. 

Thermal expansion should also be taken into account when developing a tight-tolerance part. POM is generally more resistant and stable in chemically challenging conditions and typically is the choice in such environments.

FAQs

In materials engineering, what does the term POM refer to?

POM is a polyoxymethylene (POM) engineering thermoplastic that is strong, wear-resistant, and has low friction.

What are its important mechanical and thermal properties?

POM has good dimensional stability, low friction, excellent wear resistance, high stiffness, and good thermal performance in the medium temperature range.

In what mechanical engineering applications is it used and why?

POM is widely employed in gears, sliders, bearings, bushings, and other moving mechanical components due to its ability to reduce friction and wear.

What are its performance characteristics in terms of wear and durability, relative to those of HDPE, PTFE, and other common engineering plastics?

POM offers higher mechanical properties than HDPE and superior strength and dimensional stability compared to PTFE for load-bearing applications.

Conclusion

The ability of engineering plastic POM to perform precise mechanical functions continues to make it one of the best materials to use. It is self-lubricating; has good wear strength, dimensional stability, and machining performance; and is valuable in the automotive, industrial, and manufacturing fields. POM remains a viable engineering choice for applications that require long-lasting, reliable moving parts.

Why selecting a trustworthy Supplier matters for a Buyer

Selecting the proper engineering supplier is essential to long-term reliability, efficient machining, and product performance. From precision-machined POM parts to engineering material assistance to custom manufacturing, collaborating with an experienced supplier can streamline the process and ensure reliability. Consistent quality for industrial and mechanical applications is achieved through FST Metals‘ professional knowledge of materials, precision machining services, and manufacturing support.