Fluid Power Journal

Repair or Replace: Welded Style, Tie Rod Style, or Mill Duty Style?

By Jeffrey Kenney, CFPIHT, CFPIHM, CFPMHM, CFPMHT, Hydradyne LLC Over my career in cylinder remanufacturing, there have been two questions end-users always …

Double Acting Telescopic Cylinder Halves Oil Rig Decommissioning Time

By Steven North, Design and Project Engineer, Apex Hydraulics Ltd Dismantling expired oil rigs is a costly and time-consuming operation. After decades in the …

Problem: Calculate Cylinder Size

Winner of this Air Teaser: Ali Dashti, Applied Industrial Technologies, Inc., San Marcos, CA Deadline past. Not available for submissions. This teaser is …

Problem: Calculate SCFM

Calculate SCFM: 50 Pound Spring 2″ Diameter Cylinder 6″ Stroke 1 Second to Extend 1 Second to Retract No Dwell Time Hose is 3/8″ diameter and …

Cylinder Speeds Up On Its Own

An aluminum mill has a system that pushes a large aluminum ingot from one conveyor to another. The operator complained that the pushing speed kept increasing …

Pneumatic Cylinder ISO Standards

Let’s start with a little background on the ISO committees. ISO TC131 is the committee responsible for fluid power. One of the groups underneath TC131 is …

Walking Beam Cylinder Drifting Up

A processing plant in Pakistan had a walking-beam system that would move coils of finished product to shipping for processing. Several “pot-belly” …

Displacement Cylinders vs. Regeneration Circuits

When a cylinder with a long stroke is required, there are additional design considerations. Long-stroke cylinders are subject to compression stresses like any …

The Negative Effects of Over-Pressurization

Power transmission in a hydraulic system is a product of flow and pressure. It follows that the power rating of a hydraulic pump or actuator is a product of …

Problem: Cylinder Retraction

Neglecting pilot line sizes, approximately how many seconds after pushing the start button will the cylinder start to retract? This teaser is printed in the …

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