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Hydraulic Cylinders Manufacturers and Suppliers

IQS Directory provides a comprehensive list of hydraulic cylinder manufacturers and suppliers. Use our website to review and source top hydraulic cylinder manufacturers with roll over ads and detailed product descriptions. Find hydraulic cylinder companies that can design, engineer, and manufacture hydraulic cylinders to your companies specifications. Then contact the hydraulic cylinder companies through our quick and easy request for quote form. Website links, company profile, locations, phone, product videos and product information is provided for each company. Access customer reviews and keep up to date with product new articles. Whether you are looking for manufacturers of small bore hydraulic cylinders, micro hydraulic cylinders, aluminum hydraulic cylinders, or customized hydraulic cylinder of every type, this is the resource for you.

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Industry Information
View A Video on Hydraulic Cylinders - A Quick Introduction

Hydraulic Cylinders

Hydraulic cylinders are actuation devices that convert the hydraulic energy of pressurized fluids into the mechanical energy needed to control the movements of machine linkages and attachments. This energy conversion generates linear force and motion. While single acting cylinders are available, most are double acting hydraulic cylinders, meaning that they can move in both directions along a horizontal, vertical or any other predetermined plane.

Along with directional divides, hydrolic cylinders can be separated into categories based on cylinder or barrel type. Welded hydraulic cylinders ( and tie rod hydraulic cylinders are the most common variations. The latter, tie-rod barrels, are often used for heavy duty hydraulic cylinders as they are reinforced by several external rods which bear the majority of the applied load. Welded cylinders, however, are small hydraulic cylinders commonly used in construction, agricultural and other industries where powerful cylinders must be fitted to compact machines. Smaller, lighter designs do not result in a diminished capacity as illustrated by high pressure hydraulic cylinders which are often light weight and smaller than many other models. Specialized barrels, such as hydraulic rams and telescopic cylinders, are also widely available. Cylinders of any body type use hydraulic pistons, such as those offered by suppliers listed on IQS Directory, to lift, turn, tilt, press, steer, pull and push heavy machine components and any attached loads. This strenuous work necessitates they be made of durable materials. As even stainless steel hydraulic cylinders can eventually corrode or become damaged, replacement cylinders are also available to increase the longevity of hydraulic systems.

Also called redesigned or re-engineered cylinders, replacement components can be used for more than repairs and are often integrated as operational upgrades for pre-existing machinery. As industries continue to grow, so do the required capabilities of hydraulic cylinders and the industrial equipment and machines of which they are a part. Hydraulic cylinders are extremely variable, allowing their use in a number of different industries. Agriculture, construction, oil and gas, manufacturing, military, machining, automotive, aviation, robotics, aerospace and waste removal industries all make use of these devices which greatly increase efficiency and mechanical capabilities as the output force is much higher than the initial force applied. Although the mechanism itself can provide this force in only a linear motion, clevis fittings attached to the end of the piston rod allow the attached devices to move in an angular motion. This significantly broadens the usability and applicability of hydraulic cylinders. Lifts, material handling equipment, snowplows, brakes, power steering, excavators, dozers, back hoes, cranes, elevators, forklifts, jacks, dump trucks, spacecraft, ships, planes and even advanced robotic arms utilize the power of hydraulics.

Despite their impressive conversion of kinetic energy into mechanical energy, basic hydraulic cylinders are relatively simple devices. A round, rectangular or oval tube shaped barrel makes up the main body of the cylinder that houses and connects all of the components. At one end of this barrel is the cylinder cap, which closes off and seals the non-moving end of the cylinder. The cylinder head closes off the other end, but has a round seal through which the piston rod may move in and out. Double acting cylinders have a cylinder head on both ends and no end cap. The piston face is a metal disc-like part that fits exactly in the cross section of a cylinder barrel, dividing the chamber into two smaller compartments. The piston is essential to the generation of linear motion by means of hydraulic fluid pressurization. Attached to this is the piston rod. The rod is housed partially within the barrel, but extends beyond the body through the cylinder head and is attached to the machine components which must move. Each compartment within the barrel also has a port through which high pressure hydraulic fluid is introduced and through which un-pressurized fluid is returned to a reservoir. Tubing and a pressure vessel are needed to store and transport the fluid. When pressurized hydraulic fluids are introduced to the vessel, it presses upon the piston and engages the attached rod. Direction is determined by what side of the piston meets with the pressurized fluid. Fluid above the piston will retract the rod, while fluid below it will cause it to extend. The introduction of various amounts of pressurized hydraulic fluid on either end controls the movement of the piston, rod and attached load. Several seals are placed around the piston head, flow valves and cylinder head to ensure that fluids do not leak into, out of or from one compartment to the other causing a loss of pressure and decreased functionality.

Not only the seals, but all cylinder components must be made of durable materials that can withstand the friction and heat created by the use of the hydraulic cylinder. The barrel, seals, piston and rod must also be compatible with the hydraulic fluid which is generally a mineral, oil, ether or water composite. Stamping or extrusion processes are used to produce seals which are made of nitrile rubber, viton, polypropylene, brass or stainless steel depending on the application. The pistons are made of brass, steel, stainless steel, aluminum, cast iron, or bronze. Piston rods and cylinders are made of these same materials, though are produced by different manufacturing processes. Cold rolling is used to manufacture the rods, which are often hard chrome plated to provide protection from corrosion and wear. Cylinders are made using a few possible techniques. Welding uses a single sheet of metal, while other techniques, such as CNC machining combine different finished components to create the final piece. In either case, the interior surface of the barrel must have a micro-smooth surface, allowing the piston to move cleanly through the body with minimal energy lost to friction. Selecting the proper hydraulic cylinder for a specific application involves more than manufacturing technique, body material and fluid. Further considerations include maximum operating pressure, stroke, bore size and rod diameter among others. As the work force generated by pressurized hydraulics can vary significantly, it is important to understand system requirements before choosing a specific model.

Hydraulic Cylinder Manufacturers
Hydraulic Cylinder Manufacturers
Hydraulic Cylinder Manufacturers
Hydraulic Cylinder Manufacturers – Cylinders & Valves, Inc.
Hydraulic Cylinder Manufacturers – Cylinders & Valves, Inc.
Hydraulic Cylinder Manufacturers – Cylinders & Valves, Inc.
Hydraulic Cylinder Manufacturers
Hydraulic Cylinder Manufacturers
Hydraulic Cylinder Manufacturers
Hydraulic Cylinder Manufacturers – Cylinders & Valves, Inc.
Hydraulic Cylinder Manufacturers – Cylinders & Valves, Inc.
Hydraulic Cylinder Manufacturers – Hydraulic Specialty Inc.

How to Reduce the Repair and Replacement Costs of Hydraulic Cylinders

Hydraulic cylinders are a source of energy, just like commonplace air cylinders, for a large number of pumps and motors. If your industrial machinery runs on hydraulic equipment, then you can understand how problematic the cost of their repair and maintenance can become. Repair and replacement are two aspects that undeniably stress a manufacturing businesses. This cost adds to the final production cost and decides the ultimate market price of a product. Therefore, if you want to keep your costs or expenditure down and set your MRP per the expectations of your consumers, you ideally need to contain the costs of repair and replacement.

According to industry research, as many one in ten industrial machines does not operate how it should—specifically because of design factors. To get the best out of your machines, you need to make sure that the machine that you have chosen fits into your production and capacity requirements. Additionally, the source of energy, i.e. hydraulic cylinder, should also be chosen according to the specifications of the appliance.

To keep machine repair and replacement costs under control, it is necessary to perform maintenance activities as per the scheduled time and whenever required. On time and accurate upkeep is the only way to increase the efficiency and endurance of your industrial machines. However, careful handling should never be overlooked. This article in the following subsections suggests a few tips on minimizing the expenses of machine handling during maintenance.

Check for Twisted Rods

Twists in the rods of an air cylinder are a result of poor quality materials and construction. In addition, these abnormalities can also be associated with an inappropriate rod diameter or the improper installation of the cylinder or the rod. Bent rods promote poor load balancing which can result in further problems like leakage and unexpected downtime in the application’s performance.

You need check if rods and cylinders have been mounted with the application accurately, as per the recommendations of your hydraulic cylinder supplier.

Check the Quality of the Rod

Material quality has been discussed in the previous subsection, but we quality of the rod finish is also very important. If you want the rod to work seamlessly with the load or the object, you will need to ensure that it has a superior finishing. The surface finishing should be neither very smooth nor very rough. The finishing should be also suit the object for which the rod is being used. Sometimes, industry experts suggest using alternative finishing or coating for a rod in order to extend the life and strength of the rod.

In addition to these factors, the bearing or wearing area should also be chosen carefully. The wearing area, when given an insufficient support to bear the load, causes distortion of the seal and impacts the performance of the machine adversely.

Types of Hydraulic Cylinders

  • Double acting hydraulic cylinders use hydraulic pressure to actuate the rod to extend and retract in both directions.
  • Heavy duty hydraulic cylinders are designed for high pressures, high flows and rugged environments. Heavy duty cylinders are particularly suited to demanding industrial and mobile applications.
  • High pressure hydraulic cylinders have significantly smaller and lighter designs than standard cylinders, which saves substantial weight and space in equipment. High pressure hydraulic cylinders are used in applications that need high forces and short or medium strokes, such as material testing and material transforming.
  • Hydraulic cylinder manufacturers make the appartus that changes hydraulic fluid into mechanical power.
  • Hydraulic pistons are short, cylinder shaped discs housed within cylinder barrels in order to compartmentalize the enclosed space within hydraulic cylinders.
  • Hydraulic rams are the large output pistons.
  • Hydrolic cylinders are devices that convert pressured fluid into mechanical power. Hydrolic is a common mispelling of hydraulic.
  • Large bore cylinders are designed for a multitude of applications in which a large force is required in both the push and pull directions.
  • Mobile hydraulic cylinders are used in many applications, such as snowplows, construction equipment, personnel lifts and material handling equipment.
  • Replacement cylinders are manufactured and installed in older equipment with outdated cylinders. Replacement cylinder manufacturers offer products that will update machinery with the newest cylinder technology.
  • Single-acting cylinders use hydraulic pressure to actuate the rod in only one direction.
  • Small hydraulic cylinders can have strokes of less than an inch and are used in applications that require extreme precision.
  • Stainless steel hydraulic cylinders are linear actuators designed specifically for highly corrosive environments as well as those where hygienic cleaning is essential to industrial processes.
  • Stepped cylinders are two-way hydraulic cylinders that provide a faster starting stroke and a subsequent, more powerful working stroke.
  • Telescopic cylinders have multiple stages which enable longer strokes to be achieved, while utilizing less space.
  • Thread cap cylinders have their head gland threaded on and the threads are protected by an o-ring.
  • Tie rod hydraulic cylinders use one or more steel rods, which are installed on the outside diameter of the cylinder housing, to provide extra stability. Cylinder tie-rods commonly bear a large portion of the applied load.
  • Welded hydraulic cylinders are made of a heavy duty, smooth welded housing for increased stability. Most housings of hydraulic cylinders are made of multiple parts, but not in the case of welded cylinders.

Hydraulic Cylinder Terms

Accumulator - A container in which fluid is stored under pressure. Accumulators have some type of limit in the loading mechanism for maintaining pressure.

Bleeder - Also called a bleed valve, or a device commonly used on hydraulic cylinders to remove pressurized fluid and air from the system.

Bore - The inside diameter of hydraulic cylinders.

Cap - End closures of hydraulic cylinders, that completely covers the bore area.

Closure - Cap, plug or cover for the fluid passage of hydraulic cylinders.

Depth Control Cylinder - An adjustable, mechanical or hydraulic device that is used to limit the stroke of hydraulic cylinders.

Flow Control - A device which meters the rate of fluid used in hydraulic cylinders.

Gland - The cavity of a stuffing box used within hydraulic cylinders.

Head - The end closure of hydraulic cylinders that covers the differential area between the bore area and the piston rod area.

O-Ring - A type of seal consisting of an elastomer in the shape of a doughnut. O-rings are usually mounted in a groove on hydraulic cylinders for sealant purposes.

Piston - A cylindrical member forming the internal element of assemblies in hydraulic cylinders that transmits or receives motion by a connecting rod. Fluid acts with the piston to convert pressure energy into linear motion within hydraulic cylinders.

Psi (Pounds Per Square Inch) - A unit of measurement of pressure within hydraulic cylinders.

Pump - A device found within hydraulic cylinders that turns mechanical energy into either fixed or variable hydraulic energy.

Ram - The large output piston of a hydraulic cylinders press.

Regenerative Circuit - A device that directs the rod end discharge to the piston side of hydraulic cylinders, increasing the speed of hydraulic cylinders. Regenerative circuits can be incorporated into a directional control valve as the fourth position on hydraulic cylinders.

Rephasing Cylinder - A design that allows the use of two or more hydraulic cylinders in a series. This design automatically synchronizes the position of hydraulic cylinders at the end of every stroke within the hydraulic cylinders.

Rod - A device that connects the bore area to the head of hydraulic cylinders.

Spool - Any cylindrical-shaped part of hydraulic cylinder components that controls the flow passing through the component in accordance with its movement.

Stroke - The linear movement of a valve spool or hydraulic cylinder rod that establishes the limits of motion.

Stuffing Box - A small chamber in found within hydraulic cylinders that is compressed around a reciprocating shaft or piston to form a seal.

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