Sunday, September 29, 2013
What Is the Bore in an Air Cylinder
The interior diameter of an air cylinder equals its bore. This measurement helps determine the use and maintenance needs of a particular air cylinder.
Measuring Bore
A bore gauge measures the bore. A small-hole gauge user sets the gauge smaller than the bore, inserts the gauge into the cylinder, and adjusts it until he feels a slight pressure when the gauge makes contact with the inside of the cylinder. He removes the gauge and measures the bore with a caliper or micrometer.
Choosing Air Cylinders
Choosing the right air cylinder involves considering the bore, the operating pressure and the stroke. The operating pressure measures the number of pounds per square inch (PSI) the air cylinder can withstand, and the stroke quantifies the distance between fully extended and fully retracted rod positions in inches.
Maintenance Work
Maintenance technicians measure bore to find wear on an air cylinder. The technician takes the bore measurement in intervals throughout the cylinder to determine the degree and placement of the wear. If the bore measurements vary greatly, the cylinder needs re-boring to restore its condition.
Considerations
Accurate bore measurement relies on a fully clean air cylinder, accurate instruments and a feel for the process. Accurate bore values make the difference between the function and failure of projects using air cylinders and the upkeep or decline of the air cylinders themselves.
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