Mastering Hydraulic Cylinder Sizing Calculations
Published at : 23 Dec 2025
In this video, I will walk you through all the essential design calculations needed to size a hydraulic cylinder from scratch. Whether you're a beginner or an experienced mechanical designer, this tutorial will help you understand how to perform each calculation step-by-step.
What You’ll Learn:
How to calculate bore diameter based on hydraulic force and pressure
determining the correct piston rod diameter to handle buckling and tensile loads
Estimating stroke length and daylight for your cylinder design
Calculating cylinder wall thickness using Lame’s equation
How to size and select bolts or tie rods for end caps and tie-rod cylinders
Selecting the ISO thread size for the piston rod
Choosing the right hydraulic cylinder construction type (Tie Rod, Welded, Bolted, etc.)
By the end of this video, you’ll be able to design a complete hydraulic cylinder, ensuring strength, safety, and proper functionality.
Chapters:
00:00 What we will learn
00:29 Why a Designer should Design Hydraulic cylinder
06:35 Hydraulic cylinder Working pressure selection
08:50 Hydraulic cylinder Stroke and daylight estimation
10:02 Hydraulic Cylinder bore sizing calculation
12:41 Hydraulic piston rod’s sizing calculation
15:32 Hydraulic Cylinder wall thickness calculation
17:13 Type of hydraulic cylinder design
19:39 Number of screws calculation for cylinder end cap
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