Frequently Asked Questions
- What is a hydraulic cylinder?
A hydraulic cylinder is a mechanism that is used to give linear motion and force in applications that transfer power
- How does a cylinder work?
A cylinder requires hydraulic fluid and pressure to function. The fluid stored in the cylinder is converted to motion by entering one side of the cylinder through a port and pushing the piston and rod. The reverse effect can be achieved my pumping fluid in to the opposite port of the cylinder. This linear motion creates the necessary movement of the machinery or equipment
- What are the main types of hydraulic cylinders?
There are three most common types of hydraulic cylinders:
Tie-rod: Tie-rod cylinders are not as strong as welded cylinders. They use one or multiple tie-rods to provide extra stability to the cylinder. These rods are mainly installed on the exterior of the cylinder and carry most of the load.
Welded: Welded cylinders offer more in the terms of customization and strength. End caps are welded in place to close the case of the cylinder. Welded cylinders often have a narrow body and shorter overall length, enabling them to fit better in to tight spaces in machinery.
Telescopic: Telescopic cylinders are multi-stage units that allow the cylinder’s stroke to be longer than a normal cylinder. In this case, the piston rod is also used as a piston barrel and a second piston rod is used for the consecutive barrel.
- What are the differences between Tie-rod cylinders and Welded cylinders?
Welded cylinders are proving to be superior to tie-rod cylinders. With a welded cylinder the end caps are welded to the case, as opposed to being secured by a tie-rod. Another factor that causes welded cylinders to be more desirable is they are not susceptible to stretching under high pressure and long strokes, like the tie-rod counterpart is. Welded cylinders also do not require the routine maintenance that tie-rods do.
Tie-rod cylinder end-caps are larger than the diameter of the case. Therefore, with a welded cylinder you are able to get a larger bore and more lift capacity to fit in the same space as a tie-rod cylinder with a smaller bore and capacity. The only advantage of tie-rod cylinders, especially in agricultural applications, is its cheaper cost.
Current performance demands make welded cylinders the better choice when compared to tie-rod. Applications from vehicle lifts, trailers, dump trucks and snowplows to heavy construction machinery and material handling equipment all benefit from the superior strength of a welded cylinder
- What Does ASAE Mean?
ASAE, or more recently renamed ASABE, stands for American Society of Agricultural and Biological Engineers. ASABE was developed in order to create standards for products in the agricultural market. By adhering to these standards, consumers can ensure they will get the same specifications of a product, no matter where they purchase it from.
ASAE is applied to hydraulic cylinders with the 8″ and 16″ stroke. Cylinders labeled 8″ ASAE will have a retracted length of 20.25″ and 16″ ASAE will have a retracted length of 31.5″. There are non-ASAE 8″ and 16″ cylinders on the market, but they will not be guaranteed to have the same retracted length as the ASAE model.
ASAE takes the guess work out of specifications and offers the consumer peace of mind they will be receiving an equal replacement when it comes to measurements. Please check out our inventory of ASAE cylinders available in multiple bore sizes!
- Ductile iron piston/gland compared to Steel piston/gland
Ductile iron piston/gland is outdated technology. Ductile iron was originally an appealing material for cylinders because of its strength and high concentration of carbon. However, these same positive traits are also its weakness, because the hardness of the iron causes greater wear on the rod and the honed tube of the cylinder.
Cylinder manufacturers that use iron pistons do not have any seals and only have one rubber o-ring, causing the rest of piston to create friction against the tube. Magister Hydraulics’ steel pistons have high quality polyurethane seals that greatly reduce friction inside the tube and prolongs the life of the cylinder.
Cylinders with standard ductile iron piston/glands have an average lifespan of 3 years, whereas Magister Hydraulics’ cylinders manufactured using steel piston/gland combined with polyurethane seals prove to have an average lifespan up to 7 years
- What kind of seals does Magister Hydraulics use in its cylinders?
Magister Hydraulics uses 5 component thermoplastic piston seals provided by Guarnitec in Italy, the leader in design, production and distribution of seals specifically for hydraulics. POM-C wear rings and polyurethane wipers coupled with U-cup polyurethane rod seal with inner O-ring prove reduced friction and excellence in performance
- What is a standard warranty on Magister Hydraulics products?
Our standard warranty is for a two years term. Extended warranty is available upon client’s request. For more information please contact our customer service department
- What is a default shipping carrier for orders placed online?
The standard shipping carrier is UPS. There are a few shipping options available: UPS Ground, 2nd Day Air, Next Day Air. For large orders LTL freight would be arranged
- How to measure a hydraulic cylinder?
This FAQ is the most frequent question. Therefore please watch a detailed video on how to measure your hydraulic cylinder replacement below:
Fluid Power Formulas FAQs
Bore Diameter = Inside Tube Circumference / 3.1415
Rod Diameter = Rod Circumference / 3.1415
Stroke = Extended Length (center to center of pins) – Retracted Length (center to center of pins)
Volume Displacement in gallons = (Bore Radius² * 3.1415) * Stroke / 231
Fluid Pressure (PSI) = Force (lbs) / (Bore Radius² * 3.1415)
Fluid Flow Rate (GPM) = Volume displacement (gallons) / Time units (minutes)
Column Load (lbs) = pressure (PSI) * (Bore Radius² * 3.1415)
Hydraulic Horsepower = pressure (PSI) * Fluid Flow Rate (GPM) / 1714
Cylinder Extending Speed(Inch per second) = (231 * GPM) / (60 * Bore Radius² * 3.1415)