Cylinders Inc.
Certified women-owned business
Mill Duty Cylinders

Mill Duty Cylinders Repair & Rebuild in Chicago, IL

Mill duty hydraulic cylinders are designed to be strong enough to meet the extreme demands of environments and applications. From replacements to repairs, our team at Cylinders, Inc. works with all types of mill duty cylinders, both hydraulic and pneumatic.

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What Is a Mill Duty Cylinder?

Mill duty cylinders are a durable, reliable product to reduce downtime and maintenance costs across industries. Their design specifications are not subject to NFPA limitations, meaning hydraulic mill cylinders have heavy-duty construction and are designed with bigger pistons, steel-flanged end caps, heavy-wall steel tubing, an advanced gland design, and other appealing features. Its high-pressure rating is above the industry standard and mill duty cylinders are known to be incredibly reliable in even the most intense environmental and operational conditions. They come as both hydraulic and pneumatic mill duty cylinders. 

Why Do Mill Duty Cylinders Fail?

Unfortunately, mill duty cylinders aren’t immune to damage or failure. If they fail, it is usually due to physical damage or the deterioration of their seals. If the cylinder encounters physical damage, it is usually from an external source such as another machine or an object that falls and hits the cylinder. This physical damage could result in a rod that bends or a barrel that dents which will prevent the cylinder from stroking fully. It’s also possible for physical damage to impact the rod threads which will break the cylinder away from the rod mount. Excessive wear can also cause physical damage to mill duty cylinders. In the case that the rod end doesn’t move parallel to the barrel, it can cause damage to the barrel, rod, piston, and bearing.

Mill Duty Cylinders
Mill Duty Cylinders

Pros and cons

What Type of Mill Duty Cylinder Do You Have?

There are both hydraulic mill duty cylinders and pneumatic mill duty cylinders. Regardless of the type that you have, our team at Cylinders, Inc. can help!

Mill Type Hydraulic Cylinders

Heavy duty mill-type cylinders have features such as high-load piston design, heavy wall tubing, and induction-hardened, chrome-plated rods.

  • 6 mounting styles
  • Bore sizes from 2”-24” with IHCP Rod
  • IHCP rod
  • 3,000 PSI
  • Designed for extreme mill applications

Mill Type Pneumatic Cylinders

Another type of mill cylinder can be pneumatic. This type of cylinder is designed to cover the majority of mill duty pneumatic applications.

  • 6 mounting styles
  • Bore sizes from 2”-24” with IHCP piston rod
  • 250 PSI 


What Type of Position Sensor Does Your Cylinder Have?

Do you have an electronic, smart sensor cylinder?

Generally, if your cylinder has an electronic plug or port connection, position sensing is in the cylinder. Different OEM and equipment manufactures have proprietary systems, however common systems include:

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Get Your Mill Cylinder Repaired Today!

Regardless of the type of mill cylinder that you need to be repaired, our seasoned team at Cylinders, Inc. is happy to serve you! Contact us today to get started.

Get Your Tie Rod Cylinder Fixed Today

With over 20 years of experience repairing hydraulic and pneumatic tie rod cylinders, we provide cost-effective solutions with quick turnarounds to get your equipment up to speed.

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We Serve Your Industry

Our team at Cylinders, Inc. has experience serving businesses in construction, energy, oil and gas, drilling and mining, waste and recycling, entertainment and simulation, and so much more. See a full list of industries on our corresponding industries page.

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How We Repair Mill Duty Cylinders



During the inspection process, our highly trained technicians will carefully inspect your mill duty cylinders to determine the type of repair you’re going to need. Once we know more about your specific repair, we’ll complete it right away (such as resealing the cylinder). If needed, we will get in touch with you to tell you additional details about what caused the failure and what we are doing to fix it. 



As we briefly mentioned above, how we repair your mill duty cylinder largely depends on what caused the damage in the first place. Thanks to our extensive experience working with cylinders, we’re able to tap into the latest technology and machinery to make the repair and address the root of the problem. As a result, we can help you reduce repetitive failures.


Pressure Testing

Once we have successfully completed the repair, we will pressure-test the cylinder to ensure that everything is working as it should be. This will give you and your team peace of mind that you are receiving a highly functional mill duty cylinder after we’ve worked on it. 

Ram Hydraulic Cylinder Repair FAQ

How much does it cost to repair a mill duty cylinder?

The cost to repair a mill duty cylinder is never one-size-fits-all and it’s dependent on many different factors. We encourage you to get in touch with our team directly and we’ll be able to let you know more specifics about the cost. 

Does repairing mill duty cylinders differ from repairing other types of cylinders?

Mill-duty cylinders are different from other cylinders in many ways - they have bigger pistons, steel flanged end caps and heavy-wall steel tubing, etc. All those advanced design features not only make mill-duty cylinders a reliable product, but quite a complex one too compared to other cylinder types. Contact us now to get your mill-duty cylinders fixed!

How long will a mill duty cylinder last after a repair?

Following a repair, a mill duty cylinder can last for many years. It’s difficult to pinpoint a particular timeframe as the lifespan depends on the use case of the cylinder and the environment in which it’s used.