Plastic materials for CNC

Generic HDPE

CNC machining in HDPE produces strong but lightweight parts. HDPE parts also have excellent corrosion resistance against a wide range of chemicals. Typical applications include boat components, piping, and containers.HDPE Properties

Tensile Strength, Yield (MPa)Elongation at Break (%)Hardness (Shore D)Flammability RatingGlass Transition Temperature (°C)
25.962262.380.6130

Delrin 100

Due to its high impact resistance and low friction characteristics, CNC machined Delrin is ideal for gears, door system components, and bushings. It is a lightweight and cheap alternative to metal parts and in many ways bridges the gap between plastics and metals. Delrin can also maintain its properties across a temperature range of -40oC to 120oC, which is a much bigger range than most other plastics can tolerate.General Delrin Properties

Tensile Strength, Yield (MPa)Elongation at Break (%)Hardness (Shore D)Heat Deflection Temperature (°C)Melting Point (°C)
714580160178

Generic Polypropylene

While CNC machining in polypropylene is challenging due to its tendency to gall and melt, homopolymer polypropylene offers a range of benefits for CNC machined parts. Its slick surface makes it ideal for mechanical items like gears and its fatigue resistance means that thin features such as living hinges are easy to incorporate into designs.Polypropylene Properties

Tensile Strength, Yield (MPa)Elongation at Break (%)Hardness (Rockwell R)Heat Deflection Temperature (C)Glass Transition Temperature (oC)
19-458-75049-8160-129130-174

Generic UHMW-PE

CNC machining in UHMW-PE produces tough and abrasion-resistant parts, making it ideal for applications that are exposed to impact loads and abrasive materials. Common applications include wear plates and seals. UHMW-PE is susceptible to creep and is not ideal for applications in which the parts are under continuous stress.General Acrylic Properties

Tensile Strength, Yield (MPa)Elongation at Break (%)Hardness (Shore D)Heat Deflection Temperature (°C)Melting Point (°C)
403006646.7135

Nylon 66

Nylon 66, also written as nylon 6-6, nylon 6,6, or nylon 6/6, is a more crystalline version of nylon 6. It is also referred to as polyamide 66 or PA 66. It has improved mechanical properties due to its more ordered molecular structure. Nylon 66 for machining has improved temperature resistance and lower rates of water absorption when compared to standard nylon 6. Typical applications include wear pads, guide wheels, and slide bearings.General Nylon 66 Properties

Tensile Strength, Yield (MPa)Elongation at Break (%)Hardness (Shore D)Heat Deflection Temperature (°C)Melting Point (°C)
30-981-30078-8875-428197-266

Acrylic

Acrylic is a tough material that has numerous benefits over glass. For one, acrylic can be easily machined whereas glass cannot. This gives you the option of CNC machining in acrylic when the task requires both complex geometry and high levels of optical clarity in the final part. Acrylic’s clarity makes it ideal for inspection windows, chemical testing hardware, and instrumentation covers.General Acrylic Properties

Tensile Strength, Yield (MPa)Elongation at Break (%)Hardness (Shore D)Heat Deflection Temperature (°C)Melting Point (°C)
25-851-859073-109102-122

General ABS

ABS has good dimensional stability, excellent impact strength, and is easily machined. This makes CNC machined ABS ideal for applications that require low-cost and hard-wearing parts such as tool enclosures and casings.General ABS Properties

Tensile Strength, Yield (MPa)Elongation at Break (%)Hardness (Rockwell R)Heat Deflection Temperature (°C)Melting Point (°C)
40.753.4%10797.4267

Generic PC (polycarbonate)

CNC machining in polycarbonate is relatively popular. The material’s exceptional impact resistance makes it ideal for structural components. With nearly double the impact strength of ABS, polycarbonate exhibits one of the highest impact strengths of all the common engineering plastics. It is easily formed without cracking or breaking.General PC Properties

Tensile Strength, Yield (MPa)Elongation at Break (%)Hardness (Shore D)Heat Deflection Temperature (°C)Glass Transition Temperature (°C)
40-1543-23390-9557.2-208142-152

Generic PEEK

CNC machining in PEEK allows for a wide array of applications that take advantage of this material’s exceptional properties. PEEK has very few downsides when compared to other engineering plastics. One advantage that sets it apart is its heat resistance. It can operate at high temperatures for longer than most other plastics. Additionally, PEEK is hydrophobic, so it does not readily absorb water, and it also outgasses very little under vacuum conditions. This stability is a great asset. PEEK’s uses include medical applications for temporary implants all the way to aerospace components exposed to extreme vacuum.General PC Properties

Tensile Strength, Yield (MPa)Elongation at Break (%)Hardness (Shore D)Heat Deflection Temperature (°C)Glass Transition Temperature (°C)
65-1201.5-11062-89182-210143-155

Virgin PTFE-Teflon

Despite the material’s use primarily as a coating, some medical implants are manufactured via CNC machining in PTFE-Teflon. Teflon is inert and therefore medical implants made from this material are not rejected by the body. Its low friction coefficient makes it ideal for sliding-contact components like bearings.General PTFE-Teflon Properties

Tensile Strength, Yield (MPa)Elongation at Break (%)Hardness (Shore D)Heat Deflection Temperature (°C)Melting Temperature (°C)
9-30300-40055-65115330

Rigid / Unplasticized PVC

CNC machining in PVC results in low-cost parts that have excellent mechanical properties and come with the added benefit of being resistant to the elements. The material’s moisture and UV resistance make it attractive for applications like piping and pipe fittings.Rigid / Unplasticized PVC

Tensile Strength, Yield (MPa)Elongation at Break (%)Hardness (Shore D)Heat Deflection Temperature (°C)Flammability Rating (UL 94 (1.5 mm))
45.61108072.5HB-5VA

Garolite G-10

CNC machining in Garolite G-10 produces parts that are ideal for corrosive or high-moisture applications. Typically, these combinations of environmental conditions are found in the marine industry where G-10 is used for engine components such as mounting brackets as well as for applications that require electrical insulation and mechanical strength.General Garolite G-10

Tensile Strength, Yield (MPa)Compressive Strength (MPa)Hardness (Rockwell M)Flammability RatingGlass Transition Temperature (oC)
262-310448110UL94 HB140
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