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Injection Molding

Injection Molding Machine Repair

Cylinder Repair Services for Injection Molding Machines near Chicago, IL

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Transforming Injection Molding Machines with a Legacy of Quality Since 1991

Since 1991, Cylinders, Inc. has specialized in exceptional hydraulic and pneumatic cylinder repair for injection molding machines in the Chicago area. Located in Lisle, IL, we've built a reputation for quality and expertise throughout Chicagoland.

With decades of experience, we handle cylinder repairs ranging from simple resealing to complex custom fabrication. Using state-of-the-art techniques and tools, we ensure every cylinder we repair meets the highest standards for precision and durability.

Our skilled technicians understand the critical role cylinders play in injection molding systems. We're dedicated to providing solutions that extend the lifespan and enhance the performance of your machines. Our legacy is built on the trust and satisfaction of each client we serve.

Injection Molding Machine Cylinders We RepairInjection Molding Machine Cylinders We Repair

cylinder repairs

Injection Molding Machine Cylinders We Repair

At Cylinders, Inc., our team of experts is skilled at diagnosing and repairing issues in a variety of injection molding machine components to help your machine operate safely and efficiently:

  • Clamping cylinders: These powerful hydraulic cylinders apply immense force to clamp the two halves of the injection mold tightly together. This prevents leaks of molten plastic during the injection process and ensures the final product has the correct shape and dimensions.
  • Injection cylinders: These cylinders drive the injection unit, which includes the screw mechanism that melts and mixes the plastic material. They generate the high pressure needed to force the molten plastic into the mold cavity at exactly the right speed and volume.
  • Ejector cylinders: Once a part has cooled and solidified inside the mold, ejector cylinders operate pins or plates that push the finished part out of the mold. This allows for fast and efficient removal of the part and prepares the machine for the next cycle.
  • Carriage cylinders: These cylinders are responsible for moving the entire injection unit forward and backward along the machine's frame. This helps the injection unit align properly with the mold and retract after the injection process is complete.


Our skilled welders use advanced techniques to repair cracks or breaks in cylinder bodies or end caps to restore their structural integrity.


Worn or damaged seals are a common cause of leaks in hydraulic and pneumatic cylinders. Our re-sealing services involve replacing old seals with high-quality materials, stopping leaks, improving overall efficiency, and preventing costly breakdowns.


The interior surfaces of cylinders can become worn or uneven over time. Our honing process uses specialized tools to smooth and resurface these areas to help the piston move seamlessly and efficiently within the cylinder.

Chrome Plating

We offer chrome plating services for cylinder rods to provide a hard, wear-resistant surface. This protects against corrosion, reduces friction, and extends the lifespan of these essential components.

Rod Straightening

Bent rods can significantly impair the function of hydraulic cylinders. Our team at Cylinders, Inc. carefully straightens bent rods, restoring their true shape and ensuring they operate correctly within the cylinder.

Pressure Testing

Safety is always our top priority. We conduct rigorous pressure testing on repaired cylinders to simulate the stresses they’ll face during operation. This ensures that they can withstand the demands of your injection molding process and prevents unexpected failures.

Polishing and Refinishing

We restore the external appearance of cylinders with our polishing and refinishing services. This not only improves their aesthetic but also protects them from corrosion and environmental damage.


Injection Molding Machine Repair Services

Restore Your Machine Performance: Superior Repairs for Optimal Results

Restore your injection molding machine's efficiency today with Cylinders, Inc. Contact us for top-tier repairs and experience enhanced performance and reliability.

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Industrial Manufacturing

Industrial Manufacturing

Cylinders, Inc. restores the power and efficiency of hydraulic and pneumatic cylinders in injection molding facilities. Our expertise guarantees precision, reliability, and minimal downtime for your molding operations.

Material Handling

Material Handling

We repair and maintain the hydraulic cylinders within material handling equipment essential to the injection molding process. This includes forklifts, lifts, and any other equipment that moves raw materials or finished products.

Oil & Gas

Oil & Gas

Cylinders, Inc. ensures the optimal performance of hydraulic cylinders in equipment that produces injection-molded components for the oil & gas industry.


Industries We Serve


Over 30 years of specialized experience.

Advanced Technology

Utilization of the latest repair techniques.

Quality Materials

Only the best parts and materials are used.

Customer Focus

Prioritizing customer satisfaction.

Safety First

Adherence to strict safety standards.

Lasting Relationships

Commitment to long-term client support.


Why Clients Choose to Service Their Injection Molding Machines with Cylinders, Inc.

Our Client Reviews

We finally have our new cylinder installed and our lift is back up and running. The fellows who reinstalled it were commenting on the custom job done on the cylinders. Great experience all the way around. Thank you for your help!

Andy Gordon

Our cylinders were rebuilt with very quick turnaround – and we really appreciate this, as does the Hampshire Fire Department that just lost one vehicle, and needed this repair fast.


Great service and quality work!

Vince Palermo

Great people to do business with that put out quality work.

Clayton Nessling

Quality Cylinder Repair.

Chuck Rogers
What Our Clients Say
Request Your Hydraulic & Pneumatic Cylinder Repair


Achieve Superior Results with Customized Cylinder Repairs

Get your injection molding machine back on task with Cylinders, Inc. Experience customized, superior repairs tailored to your needs. Contact us now and ensure your operation runs at peak performance!

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Mon-Fri: 7:00AM - 4:00PM

Sat-Sun: closed

Frequently Asked Questions

Can Cylinders, Inc. repair all types of injection molding machines?

While we specialize in hydraulic and pneumatic cylinder repair, our expertise has broad applications across various injection molding machine brands and models. Please contact us with the specifics of your machine and the issue you're facing, and we'll gladly assess if we can provide a solution.

What kind of turnaround time can I expect for repairs?

Turnaround time depends on the complexity of the repair and parts availability. Our goal is to minimize your downtime. We'll provide an estimated timeline once we've diagnosed the issue with your cylinder(s).

Do you offer preventative maintenance for injection molding machines?

While we don't offer full preventative maintenance programs for the entire injection molding machine, we strongly recommend regular cylinder inspections and seal replacements. This can catch potential issues early, prevent leaks, and optimize your machine's performance. Contact us to discuss a maintenance plan for your cylinders.