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CNC Machining in Polyethylene

Similar to other engineering plastics, CNC machining Polyethylene is a subtractive machining process to manufacture PE plastic components with certain machining techniques.

What Is PE (Polyethylene) Plastic?

The Definition of PE (Polyethylene) Plastic

Polyethylene, also known as Polythene or PE, is a white waxy translucent material with a high strength-to-weight ratio, good impact strength, and excellent weather resistance. This engineering plastic features its low friction coefficient, low hardness and strength but high ductility and impact strength. PE plastic has superior dielectric properties and chemical stability, so it’s a good electrical insulator and highly resistant to organic solvents such as phosphoric acid, sodium hydroxide, hydrofluoric acid, and hydrochloric acid at room temperature. However, it can be eroded and dissolved in nitric acid and sulfuric acid, and easily degraded by ultraviolet radiation. According to the polymerization method, molecular weight, and chain structure, Polyethylene is divided into different types, typical ones among those including High Density Polyethylene (HDPE), Low Density Polyethylene (LDPE), Linear Low Density Polyethylene(LLDPE), and Ultrahigh Molecular Weight Polyethylene (UHMWPE).

Polyethylene CNC Machining Specification






Liners for chutes and hoppers, chain guide profiles, Machine guards, dock bumper linings.


It is determined by the desired effect and the PE type used. A tolerance of ±0.010” (±0.25 mm) is available at Runsom.


Superior abrasion resistance, a diversity of PE variants, great toughness and impact strength, and great chemical resistance.

Wall Thickness

It is mostly decided by the available machine and part geometry. A minimum wall thickness of ±0.03” (±0.8 mm) is available at Runsom.

Lead Time

As fast as 3 days, but it will be finally determined by part complexity and order quantity.

Max Part Size

200 x 80 x 100 cm(the available size is mostly decided by the machine and part geometry).


3-axis & 5-axis CNC milling.


As Machined, Bead Blast, Annealing, Powder Coat.

Polyethylene CNC Machining Manufacturer – Custom CNC Machined PE Plastic Parts

CNC Polyethylene machining is an efficient and practical means of manufacturing large batches of high precision components with sophisticated structures and high repeatability. Backed by rich experience and technical knowledge of CNC machining plastics and metals, Runsom has the capability to offer global customers the best solution to save costs and improve the profitability of their business. We are continuously dedicated to delivering precision machined parts or components to clients across the world and making progress in this field consistently. There are a large number of combinations of materials, processing methods, and surface finishing operations to choose from, so you can truly enjoy the overall one-stop services at Runsom starting from model designs to materials selection to production.
If you have demands on manufacturing custom CNC machined parts in high-density, low-density, or other polyethylene variants, turn to Runsom and you will get the best finished results. Request a quote online for free right now!

Custom CNC Machined PE Plastic Parts at Runsom

Typical Types of Polyethylene Plastics


High-Density Polyethylene for CNC MachiningHDPE is an opaque white waxy powder or particles with nontoxicity and crystallinity up to 80% ~ 90%. Its softening point and serving temperature are 125 ~ 135 ℃ and 100 ℃ respectively. This non-polar thermoplastic resin exhibits large quantities of excellent properties including electrical insulation, good wear and cold resistance, amazing chemical stability, and great chemical inertness to any organic solvent at room temperature, etc. Compared with Low-Density Polyethylene, HDPE has better mechanical strength like surface hardness, tensile strength, and rigidity.


Low-Density Polyethylene for CNC MachiningLDPE, a kind of waxy particle, is milky white and non-toxic with a matte surface. It has the lightest density (0.91-0.93 g/cm3) in polyethylene resin density. It has a lot of notable features such as electrical insulation, good flexibility, ductility, easy processing, resistance to general organic solvents, transparency, and great chemical stability. And Low-Density Polyethylene has lower hardness but higher impact strength than that HDPE.  


Linear Low-Density Polyethylene for CNC MachiningSimilar to LDPE, LLDPE is milky white, non-toxic, and waxy particles but its density (0.918 – 0.935g/cm3) is a little high than the former. It shows a variety of advantageous properties, including good resistance to low and high temperatures, high strength, toughness, and rigidity. LLDPE is a popular material in agriculture, medical, and many industries since it has good environmental stress cracking resistance and is insoluble in acid, alkali, and organic solvents.


Ultra-high Molecular Weight Polyethylene for CNC MachiningUHMWPE, short for Ultrahigh Molecular Weight Polyethylene, is a subset of HDPE (High-Density Polyethylene) compounds. This kind of high molecular compound is difficult to process, but it has some additional advantages as well. Its exceptional wear resistance and overall toughness are beneficial from this material’s extremely long polymer chains. And its friction coefficient can match the Teflon but its abrasion resistance is better.

Our Strengths in CNC Polyethylene Machining Services

ISO 9001:2015 certificated facilities and quality assurance

Rapid prototyping and small to large batch production

Well-functional equipment and measuring instruments devices

High-speed manufacturing while focusing on every detail

Highly skilled specialists and wholehearted staff members

Competitive prices and available machining solutions

Polyethylene FAQs

Ultra High Molecular Weight Polyethylene (UHMW) is an ideal material for CNC machining, which has an excellent strength-to-weight ratio and can be machined as easily as wood. This kind of plastic is greatly resistant to wear and abrasion and enhances the lifespan of machinery while lowering maintenance costs. 

Polypropylene in sheet stocks is widely applied to CNC manufacturing. Runsom utilizes CNC machining PE plastics to produce prototypes or small to large volume production.

Polyethylene is the most common type of consumer plastic by far and is used in lots of daily materials. It is a thermoplastic product, which means that it can be melted into a liquid and then cooled into a solid repeatedly.

Runsom employs CNC machining technologies to process UHMWPE materials that can be easily drilled, turned, milled, sawed, welded, planed, and stamped. Our advanced machines with sharp tools allow for the highest-quality surface finishes. And our latest CNC lathes with high-speed and light metal tools are available for fabricating UHMWPE products with the best finished results and accuracy.

Despite the similar features between UHMWPE and Teflon (also known as PTFE), there are some key differences between them. Compared with Teflon, UHMWPE is cheaper and has far better wear properties. However, Teflon has better heat tolerance than UHMW when suffering from continuous operations.

UHMW can function well in both wet and dry conditions. It can be bent ultimately enough to ensure sufficient flexibility required for installing parts.