Plastic Guides

General Information

  • High mechanical strength to withstand high torque.
  • All plastics used are resistant to acids, solvents, petroleum products, grease and perspiration.
  • Good electrical insulation properties of all plastic materials used make them preferable to like metal products.
  • Surface hardness—impervious to incandescent chips and sharp tailings as happens during machining.


  • Thermoplastic materials with highly advanced technical characteristics: polymide, acetyl, polypropylene, polycarbonate & polyester resins.
  • Temperature range for extended working periods
  • High impact-175° to 195°F
  • Fiberglass reinforced—265° to 300°F


  • Phenolic thermoset materials that generally harden during molding following irreversible polymerization.
  • Temperature range for extended working periods-210-230°F.

Machining Instructions

Use Low Speed or Coolant When Machining Steel Inserts to Prevent Overheating and Possible Stress Damage to Plastic

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About Monroe


Over 60 years of manufacturing experience to best serve our customers



Monroe provides custom manufacturing solutions to clients throughout the world



Our knowledge, customer service & processes are structured to reduce delivery times, improve quality & cut costs



Monroe is committed to customer satisfaction, we strive for continuous improvement in our products and our people.


The information contained in this website is for general information purposes only. The information is provided by Monroe Engineering, LLC, Inc. (Monroe) and while we endeavour to keep the information up-to-date and correct, we make no representations or warranties of any kind, express or implied, about the completeness, accuracy, reliability, suitability or availability with respect to the website or the information, products, services, or related graphics contained on the website for any purpose. Any reliance you place on such information is therefore strictly at your own risk. All users should evaluate product suitability for each intended application of that product under actual use conditions. In no event will we be liable for any loss or damage including without limitation, indirect or consequential loss or damage, or any loss or damage whatsoever arising from this information.