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Plastics Properties and Testing
Published in Manas Chanda, Plastics Technology Handbook, 2017
For the examination of polyethylene and α-olefin resins, such as polypropylene, and generally for thermoplastic resins that do not dissolve rapidly, hot pressing can be a most convenient and quick method of preparing films. The polymer is pressed between polished stainless steel plates (using a temperature at which plastic flow occurs readily) in a small hydraulic press (which generates a ram pressure of about 2 kN/cm2) and cut to the same size as platens. To assist in stripping the pressed film, the plates are coated with polytetrafluoroethylene (PTFE). For films with thicknesses greater than about 0.05 mm, feeler gauges may be used as spacers, but for thinner films, the sample thickness is adjusted by altering the amount of material used. (Feeler gauges are small lengths of steel leaves or blades of different thicknesses used to check the parallelism and measure the clearance between two parts, typically in thousandths of an inch or hundredths of a millimeter.)
Marking out and measuring
Published in Andrew Livesey, Alan Robinson, The Repair of Vehicle Bodies, 2018
A feeler gauge is used to measure small clearances between two objects and in some cases to establish the amount of wear or distortion of a component part. Each tempered steel blade has a number indicating its thickness in millimetres. The thicknesses are carefully graded in order that various clearances ranging from 0.01 mm to 1.0 mm can be measured. The gauge illustrated in Figure 6.12 is imperial, but this tool is now mostly made in metric sizes.
Couplings
Published in Don Renner, Hands-On Water/Wastewater Equipment Maintenance, 2017
9.67 After the parallel alignment is established, the angular alignment must be checked. This is accomplished with a thickness (feeler) gauge. If the coupling faces do not contact each other, the thickness gauge should be inserted between the faces at the top position. The thickness gauge should then be inserted between the faces at 90” intervals around the coupling. Misalignment will be indicated by a loose or tight fit at each point.
An experimental study on wear, deposits, performance, and emissions of bio-fueled motorcycle engines
Published in Energy Sources, Part A: Recovery, Utilization, and Environmental Effects, 2023
Tuyen Pham Huu, Khanh Nguyen Duc, Truc Nguyen The, Tien Nguyen Duy, Nguyen The Luong
An engine compression tester that has a measurement range from 0 to 20 bar was used to determine cylinder compression pressure. A 24.1-megapixel digital camera from Canon brand was used to take images of engine components, ignition, and fuel system elements. A digital micro weighing scale capacity of 22 g and accuracy of 0.001 mg was selected to measure the accumulated deposits on spark plugs, valves, and valve seats. In addition, a feeler gauge made of calibrated metal strips was quite suitable for determining the spark electrode gap. In the experiment, the fuel system for both E0-engine and E5-engine remained unchanged. Figure 2 depicts the experimental setup schematically.