Delrin is a versatile homopolymer variant of polyoxymethylene (POM) that exhibits high strength, high hardness, a low coefficient of friction, and outstanding dimensional stability. Also known as acetal, polyacetal, and polyformaldehyde, this engineering thermoplastic is commonly used to produce products as diverse as gear wheels, ball bearings, fasteners, ski bindings, and eyeglass frames.Delrin is especially popular in the automotive and electronics industries. As the leading manufacturer of CNC machining delrin parts for over 25 years, Worthy Hardware is well equipped with 35 sets CNC Machines, including 3 sets 5 axes,4 sets 3 axes, 12 sets turning and milling compound. These machines could allow us to make prototypes,small-batch and mass production parts for Delrin materials.

What is CNC machining POM (Delrin/Acetal)?

Pom is a white or black plastic granule with high hardness, high steel and high wear resistance. Mainly used for gears, bearings, auto parts, machine tools, instrument internals and other products that play a skeleton role.People also called it to be Acetal or POM.CNC machining pom is a process that applies computer-controlled digital technology to remove the extra material and complete any necessary cutting, turning or milling. This can be done with machine tools depending on what's needed for your specific programming before getting an end product from pom in their final form.

Mechanical Properties

Density (g /cm3) Yield tensile strength (MPa) Tensile strain at yield % Rockwell hardness MPa Shore Hardness MPa
1.39-1.43 63 10 135 85


(1) POM is a crystalline plastic, density of 1.42g/cm3, its steel is very good, commonly known as "race steel".

(2) POM has fatigue resistance, creep resistance, wear resistance, heat resistance, impact resistance and other excellent performance, and the coefficient of friction is small, self-lubricating good.

(3) POM is not easy to absorb moisture, water absorption rate of 0.22 ~ 0.25%, good dimensional stability in a humid environment, its shrinkage rate of 2.1% (larger), injection molding size is difficult to control, the heat deflection temperature of 172 ℃, paraformaldehyde has two kinds of homopolymer formaldehyde, different performance (homopolymer formaldehyde temperature resistance is better).


What are the benefits of CNC Machining POM(Delrin/Acetal)?

POM(Delrin/Acetal) is a thermoplastic engineering plastic with high melting point and high crystallinity. Due to the good characteristics, it is very suitable for CNC machining on automatic lathes. Worthy Hardware is committed to the precision machining of delrin precision parts and has summarized a lot of benefits of delrin.

1) High mechanical strength and rigidity;  

2) Good environmental resistance and organic solvent resistance;

3) Highest fatigue strength;

4) Strong resistance to repeated impact;  

5) Good electrical properties;

6) Wide temperature range (-40℃~120℃);

7) Excellent dimensional stability;  

8) It has self-lubricity and good wear resistance.


Worthy Hardware Advantages

When you source the CNC Machining shops from the world, there are huge numbers of CNC machining service providers. Why you should choose Worthy Hardware as your trust vendor?

CNC machining

Advantage 1: Comprehensive Capabilities

As the leading manufacturer of CNC machining for over 25 years, we are well equipped with 35 sets CNC Machines, including 3 sets 5 axis ,4 sets 3 axis, 12 sets turning and milling compound. These machines could allow us to make prototypes, small batch and mass production parts. The fastest delivery time is 3 working days.

CNC machining

Advantage 2: Rich Experience

Our engineers and production workers have at least 15 years of CNC Machining experience, So we are responsible for various complex types of precision parts. We are very strong in making the tough materials, such as tool steel, alloy steels, SS316.

CNC machining

Advantage 3: Strict Quality

As the ISO 9001:2015, certified quality management system, all the team, material and machines are in regular status of quality assurance, we make it correct at the first time not only to ourselves, but also to our customers. We check and maintenance the machines everyday except the holiday time. In the production stage including the samples, the production workers check the dimensions frequently, and then the production manager will check the dimension again, finally our QC department will make the final checking with CMM. We make the 100% inspection for the parts, especially for the thread and surface.

CNC machining

Advantage 4: Stable Employees

80% of the workers in Worthy Hardware have worked here for more than 12 years, and most are home fellows. They're settled down in Donguan already. Therefore, we can be assured that quality and delivery time will not fall apart anytime soon because we've already been through all these hardships together as one family!


Customer Testimonials

In the past 25 years, our clients are all over the world, including the world's top 500 companies such as Jabil, ABB, Medtronic and so on. Do you want to know what our customers say about us? Let's take a look.

Justin, CEO of a lighting company

I inspected the top two pieces of all five boxes. Everything is beautiful! BEAUTIFUL! You remove so much stress from my shoulders. I know that when we pay you to manufacture a product, it will be made perfectly. The glass bead blasting and anodizing is always beautiful. I am so very happy! You make it easier for us to run our business. There is no trouble! With most factories, I have a moment of fear before I open their boxes. Will the components be made correctly? Do they care about quality? It is often a war. And Dennis has to fight the war, treating most factories like small children! But, not your company. You’re company is world-class. You make beautiful components!Thank you very much for your hard work. We will work together for many lifetimes!

David, General manager for a family owned business

I’ve been working with Chinese manufacturers since 2004 and had some really unfortunate partnerships until 2012 when we partnered with Worthy Hardware. At first,we only gave them small orders to test and make the start. However,their response speed was very fast ,and their engineers help us improved our designs more simple, this helped us reduce a lot of cost.Our cooperate is more and more stable! We trust Worthy Hardware always ,very responsible. Your guys are great! .Worthy Hardware is by far my favorite, because of the way they handle business and the quality of what they make.If you are from USA and would like to know more about Worthy Hardware,i would be very happy to be as an endorsement.


CNC Machining POM (Delrin/Acetal) FAQ

1.Why POM (Delrin/Acetal) is deformed in the CNC machining process?

1) Clamping deformation:Unlike steel, clamping the delirn will make deformation, after rough cnc machining, the product will return to its original shape.
(2)Thermal deformation, a lot of heat is generated during processing, POM material is sensitive to heat, if there is high heat in the CNC machining, this will result in deformation.
(3)Elastic deformation, POM material has good toughness. When cutting, the product will be elastically deformed.

2.How to avoid the deformation for POM (Delrin/Acetal) in CNC machining?

We could use glue to paste the material to avoid the deformation.
We could use high-speed tools to cut,because this kind of knife is very sharp, this could reduce the heat in the cutting.
Do not cut too much.


CNC Machining POM (Delrin/Acetal) Projects

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