How to Measure a Hydraulic Cylinder
When you’re looking to replace your hydraulic cylinder, the best approach is to use your current cylinder’s model number to determine a proper substitute. However, if you are unsure of your cylinder’s model number, an alternative solution is to measure your cylinder.
While it may seem tedious, getting hydraulic cylinder measurements isn’t overly complicated. Whether you need a telescopic cylinder or a welded cylinder, with the right tools, you can record your cylinder’s measurements and find a suitable replacement cylinder. Keep reading to learn which tools you’ll need and how to properly measure your cylinder. Contact us today for assistance, components, or more information.
Tools Needed to Measure a Hydraulic Cylinder
Measuring hydraulic cylinders is generally a simple process and only requires a few tools. To measure your cylinder, you will need:
- A tape measure
- Calipers
- Your manufacturer’s manual
You will also need to record your measurements. We offer free worksheets to record and submit your cylinder measurements. View our telescopic cylinder worksheet or our welded cylinder worksheet based on your cylinder model, and let us get you the right replacement cylinder today. Contact us for assistance.
Step-by-Step Instructions for Hydraulic Cylinder Measurements
Here are the 8 hydraulic cylinder measurements you need for correct hydraulic cylinder sizing.
1. Bore Diameter
The bore diameter, or piston diameter, is the primary dimension of the cylinder. This measurement can be determined in two ways. If your cylinder is disassembled, measure the inside diameter of the barrel. If the cylinder is assembled or installed, measure the outer diameter of the cylinder barrel, then subtract the thickness of the tubing walls.
2. Rod Diameter
The rod is the part of the cylinder that performs the extension and retraction operations. Use calipers to measure the rod’s thickness and determine its diameter.
3. Retracted Length
The retracted length of a cylinder refers to the distance between a fixed location on the cylinder and a marked location on the rod when the cylinder is in a fully retracted position. Measure from one point to the other.
4. Extended Length
Similar to the retracted length, the extended length of a cylinder refers to the distance between a fixed location and a marked location on the rod. However, this measurement requires the cylinder to be in a fully extended position. Measure from one point to the other.
5. Stroke Length
The cylinder’s stroke length can be determined by subtracting the retracted length from the extended length.
6. Base and Rod Mount Dimensions
Determining base and rod mount dimensions is critical to ensuring your replacement cylinder will fit your equipment. There are a variety of mount styles, including flange, side lug, pivot, trunnion, tie rod, and more, each with different requirements and measurements. Consult your manufacturer’s manual to determine which style of mount your cylinder uses and how to best measure the mount.
7. Hose Port Style and Size
While cylinder hose ports will vary based on cylinder style and configuration, the most common designs feature threaded female ports that require male hoses. Standard thread sizes generally measure 1/4, 3/8, 1/2, or 3/4 inches. Consult your manufacturer’s manual for your specific host port size.
8. Working Pressure
Your application, hydraulic system, and hydraulic pump capabilities determine your hydraulic cylinder’s working pressure. Consult your manufacturer’s manual to find the parameters of your cylinder, as values can vary widely.
Common Mistakes to Avoid During Hydraulic Cylinder Sizing
Getting the correct measurements is essential to ensure your replacement cylinder matches your equipment. Avoid these common sizing mistakes:
- Rounding measurements up or down
- Using imprecise measuring tools
- Not referencing your manufacturer’s manual
- Failing to double-check all measurements
For further guidance with measurements, contact us today and a team member will assist you.
Telescopic vs. Welded Cylinder Measurements
Telescopic cylinders and welded cylinders feature different measurement requirements. These graphs are intended to serve as a visual representation to help you better understand the design and composition of these cylinders.
Telescopic Hydraulic Cylinders
Welded Hydraulic Cylinders
Contact Hydraulic Cylinders, Inc. for Replacement Hydraulic Cylinders
Need assistance? Hydraulic Cylinders, Inc. is your premier source for aftermarket hydraulic cylinders, components, and accessories. Our team of experts can help you identify which replacement cylinder is the right solution for your equipment, or help design and engineer a custom-built cylinder to meet your exact needs. With FASTSHIP same-day shipping, we supply you with the cylinders you need to demolish downtime and keep your operations up and running.
Contact us to learn more or request a quote to begin your order today!
