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HDPE CNC Machining

Polyethylene (PE) is a thermoplastic with a high strength-to-weight proportion, great effect toughness, and exceptional climate resistance.

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HDPE CNC Machining

Polyethylene (PE) is a common plastic material made from the polymerization of ethylene particles. It has a high strength-to-weight ratio, good impact stamina, and excellent climate resistance.

PE is available as high-density polyethylene( HDPE) or low-density polyethylene( LDPE).

LDPE is unsuitable for CNC machining due to its reduced density and low strength.

HDPE has high tensile toughness and high thickness. It is a reasonably rigid plastic with a very crystalline structure; CNC machining in HDPE is similar to other engineering plastics.

UHMWPE (Ultra-High Molecular Weight Polyethylene) is a special polyethylene with an incredibly high molecular weight.

UHMWPE has exceptional residential or commercial properties in wear resistance, impact resistance, chemical stability, and electric insulation, which have led to its extensive usage throughout different industries.

UHMWPE CNC machined parts resemble those of other design plastics.
HDPE CNC components are generally for piping and packaging. UHMWPE CNC components are typically for food processing devices, conveyor lines, gears & bearings, pistons & shutoffs, and marine equipment.

PE Properties

Ultimate tensile strengthYield strengthYoung’s modulus (modulus of elasticity)Elongation at breakHardnessUV resistanceApplication
HDPE22.1 – 31 MPa26.2 – 31 MPa1.07 – 1.09 GPa500 – 700 %7.9 – 9.9 HVModeratePiping PackagingLearn More
UHMW-PE38.6 – 48.3 MPa21.4 – 27.6 MPa0.894 – 0.963 GPa200 – 500 %3.4 – 8.3 HVGoodFood processing equipment Conveyor lines Gears & bearings Pistons & valves Marine equipmentLearn More

PE CNC Machining Surface Finishes

PE CNC Machining Gallery

Cost-saving Design Tips

CNC machining in HDPE can create lightweight and low-cost components. Below are some extra cost-saving suggestions to make production more affordable.

1.Sub Assemblies

HDPE is acquired as sheet or bar supply in varying sizes. Creating components as separate components that can after that be put together right into the final whole is frequently a good idea. As stated above, HDPE does not function well with adhesives but can be welded. Alternatively, mechanical bolts can be used to screw parts together.


HDPE is prone to establishing surface fractures when revealed to the warmth and stress of machining. Annealing HDPE will assist in avoiding cracks that may make the component pointless.


Ultra-High-Molecular-Weight Polyethylene (UHMW) is a great material for machining. A hard plastic with a slippery surface, it is resistant to abrasion and wear, and allows for an extended equipment life which helps cut maintenance costs. It provides high-impact strength and is the optimal material for machine guards and chute/hopper liners. UHMW machined parts will outwear all other materials like metals, nylons, or fluoroplastics.

CNC Machining is the primary method used to fabricate parts from UHMW. Material made from UHMW can be milled, turned, sawed, drilled, planed, drilled, welded and stamped. Tools should be kept sharp to get the highest quality surface results. UHMW products can also be machined to a high quality finish on the lathe utilizing high speed, light metal working machines.

UHMW is flexible enough to perform well in both wet and dry environments. UHMW can be bent sufficiently to accomplish flexibility required for installing parts.

Although UHMW and Teflon (also known as PTFE) are similar, they have some key differences. Teflon is more expensive than UHMW and can only handle about 20% of the load that UHMW can. Both have a low coefficient of friction, but Teflon is more slippery. Overall, UHMW has far better wear properties than Teflon, but Teflon can withstand 4X the temperature that UHMW can during continuous operation.

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