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Plastic Machining Services

CNC Machining

plastic machined partSourcing machined plastic components can present a mine field of technical challenges. A call to the experts at Cox Manufacturing is a wise first step toward establishing a trustworthy supply of quality parts.

Plastic Machined Parts

The Cox promise is delivery of the quantity you need, when you need it, without fail. This pledge is backed by a level of plastics-specific knowledge and experience the average machine shop simply doesn’t possess. We understand the unique characteristics of both high performance and standard utility plastics. Cox engineers and machining professionals know the ideal spindle speeds and feed rates for plastic machining success. They are aided by an in-house tooling department equipped to create the highly accurate tools a plastic machining project demands.

Plastic CNC Machining:

  • PVC
  • Nylon
  • Delrin (Acetal)
  • PTFE
  • UHMW
  • Ultem
  • PEEK
  • And many more custom plastics

Industrial Plastic Machining Characteristics

PVC (Gray Color)
  • Tolerances for a 1/2" Dia. Bar +/-.003 (Ground)
  • Material Cost Factor 0.9
  • Machining Cost Factor 0.8

PVC is a great, low-cost plastic often machined for insulators.

Nylon, Extruded "Natural" or "Black" Color
  • Tolerances for a 1/2" Dia. Bar +.002/-.000 (Ground)
  • Material Cost Factor 1.2
  • Machining Cost Factor .75

Nylon is a good plastic for machining. It is also very versatile as people use machined parts for insulators, bearings, and for short-runs of products that will be converted to injection moldings.

Delrin (Acetal) "Natural" or "Black" Color
  • Tolerances for a 1/2" Dia. Bar +.002/-.000 (Ground)
  • Material Cost Factor 1.5
  • Machining Cost Factor 0.7

Delrin is very similar to nylon, but has better machinability. It is often used for insulators or bearings.

Prototypes & Production Runs

In prototype quantities or production runs, Cox capability is a key to plastic part quality and cost effectiveness. Learn more by contacting us for free information on beginning your next plastic component project.


Learn more about the material options available at Cox by choosing from the menu below. For in-depth materials data to support an engineering or product development project, consult our machining materials guide.