
Illinois’ Top Custom Plastic Injection Molding Company
Retlaw Industries is a trusted plastic injection molding company in Illinois, supplying custom thermoplastic components to businesses across Illinois, the Midwest and nationwide. From design and engineering to product assembly and quality control, we produce custom plastic parts for automation, transportation and more. Contact us today for high-quality custom plastic parts in Chicago, Aurora and other Illinois cities.
An Unmatched Plastic Manufacturing Process
We collaborate with customers individually and take the time to make the best plastic components for you. Services we offer include:






Thermoplastic Idler Pulleys Sold in Illinois
As a top plastic injection molding company, Retlaw specializes in plastic OEM part production with ready-made products for Illinois customers. We make thermoplastic pulley wheels for flat belts, round belts, cable belts, V-belt drive and flangeless pulleys, meeting the needs of various Illinois manufacturing facilities.
Made to meet the highest quality standards, our injection-molded idler pulleys feature:
- Reduced heat transfer for longer life
- Corrosion resistance
- Strengthened belts
- No rivet fatigue
Available in a range of sizes and styles, our plastic pulleys meet multiple applications across various markets. Retlaw’s experienced designers can make custom idler pulleys to suit your needs.
Pulley Adapters For Every Application in Illinois
Retlaw Industries manufactures pulley adapters with multiple bore diameters, widths and standoff sizes for use in Illinois. Our manufacturing professionals make plastic injection-molded adapters in-house for various pulley and sprocket sizes and uses.
Available adapter styles include:
If you don’t see the size or style you need, contact our design team for a customized pulley adapter made to your precise specifications.

Roller-Chain Sprockets & Rebar Chairs
Outside of manufacturing plastic idler pulleys, Retlaw Industries produces high-quality plastic sprockets for rebar chairs and roller-chain systems. As Illinois’ top plastic injection molding company, our molded plastic roller-chain sprockets and rebar chairs are guaranteed to meet your specifications and satisfy your injection molding needs.
Our plastic injection molding experts design and produce plastic rebar chairs in many configurations including:
Serving All Types of Illinois Industries
Retlaw Industries’ custom injection molded plastic parts meet the needs of industries across Illinois. Our high-quality assembly equipment and years of injection molding experience help us custom-make precision plastic parts for your personal needs and applications. Some of the industries we’ve produced for include:
- Lawn and Garden Care
- We create robust idler pulleys, sprockets and adapters specifically designed for mowers, trimmers and landscaping tools.
- Fitness
- Our expertly molded plastic components improve the functionality and lifespan of exercise equipment and gym machines.
- Automation
- We manufacture dependable injection molded plastic parts to facilitate the operation of automated systems across multiple sectors.
- Electronics
- Our injection-molded plastic components adhere to the stringent requirements of electronic devices and their intricate parts.
- Construction
- We provide durable plastic rebar chairs and other essential plastic components for concrete reinforcement in construction projects.
- Appliances
- Our custom-designed plastic parts enhance the performance and effectiveness of household and commercial appliances.
- Agriculture
- We supply resilient plastic components tailored to endure the challenging conditions of agricultural machinery and equipment.
- Food Production
- Our food-safe plastic parts comply with strict hygiene regulations for food processing and packaging operations.
- Warehouses
- We offer plastic components to improve the durability and efficiency of material handling and storage solutions.
- Transportation
- Our injection-molded parts are designed to meet the demanding requirements of the automotive, aerospace and transportation industries.
Retlaw’s Proven Production Process
Our Enterprise Resource Planning software provides a thorough and efficient production process for your component, from design to quality control. As Illinois’ top plastic injection molding company, we produce thermoplastic idler pulleys with shoulder adapters, custom injection-molded roller chain sprockets and more to meet your exact component needs. We are a member of the American Society for Quality Control (ASQ), guaranteeing a top-quality component every time you buy from Retlaw.
Plastic Injection Molding Services for Illinois Cities
Retlaw Industries provides custom plastic injection molding services to Chicago, Aurora, Gurnee, Rockford, Naperville and more cities across Illinois. Contact us today for more information on custom plastic injection molding in Illinois.