Technical Articles

Pratt & Whitney Measurement Systems, Inc. has published these technical articles:

(Calibration Instruments, Standards and Reference Sources)
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The need to improve corporate bottom lines, measure tighter tolerances and comply with standards such as ISO 9000, QS-9000 and Z540-1 forces quality managers to continuously improve efficiencies. In...
(Calibration Instruments, Standards and Reference Sources)
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The wavelength of light provides a very high resolution, linear, and stable reference for dimensional measurement. Labmaster® instruments effectively couple the wavelength of light to the part to...
(Inspection Tools and Instruments)
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Millionths of an inch (0.025 micron) measurement requires special methods and equipment. This paper will discuss considerations and practices we have found effective for maximizing accuracy in...
(Inspection Tools and Instruments)
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Harmonic Drive located in Peabody, MA is a leading manufacturer of precision gears, gearheads, servo actuators and motion control systems. The Pratt and Whitney Labmaster Universal has helped Harmonic...
(Inspection Tools and Instruments)
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The lead tribology Metrologist of one NASA laboratory stated "The radial internal clearance and axial internal clearance kits for the Labmaster Universal will help further establish us as a very...
(Inspection Tools and Instruments)
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At Delta Airlines' Calibration Laboratory, the Pratt & Whitney Labmaster Universal has again proven itself as a resource that will expand and enhance the capabilities of any laboratory that makes...
(Inspection Tools and Instruments)
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Ball measurement presents challenges not found in parallel surface and cylindrical geometries. This paper will discuss four approaches to meeting these challenges (for balls up to 8" inches in...
(Calibration and Testing Services)
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An ACME thread has a screw thread profile with trapezoidal outlines and they are commonly used where large loads or high accuracy are required; for example, in a vice or lead screw....
(Product and Material Testing)
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The Labmaster Universal is designed mainly for one dimensional gage calibration (gage blocks, master rings, plug gages ...), but can be used for many other artifacts and part measuring. Two things...
(Product and Material Testing)
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A bench micrometer is a type of gauge or tool used for inspection which typically resides on a work bench that measures length whose accuracy and precision is approximately 20 micro-inches (0.5...
(Product and Material Testing)
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Dimensional Metrology is the science of calibrating and using measuring equipment to determine the physical size or distance from an object. Inspection is a critical step in product development and...
(Calibration and Testing Services)
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The most common pipe thread is tapered. Tapered pipe thread standards are covered by American National Standard Institute/American Society of Mechanical Engineers (ANSI/ASME) and applicable American...
(Calibration Instruments, Standards and Reference Sources)
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Gage (gauge) blocks are available in various grades, depending on their intended use. The grading criterion is tightness of tolerance on their sizes; thus higher grades are made to tighter tolerances...
(Calibration Instruments, Standards and Reference Sources)
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Diameter Tolerance Chart Reference (ANSI/ASME B89.1.5)...
(Calibration Instruments, Standards and Reference Sources)
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National, Regional and International Standards (current as of August 17, 2017)...
(Calibration Instruments, Standards and Reference Sources)
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A thorough calibration of a parallel thread gage (internal or external) can be very time consuming, but with the proper instrument, it doesn't have to....
(Calibration and Testing Services)
From this Article:
Calibrating external thread pitch diameter with three thread wires is a well-proven method and the most common one in use. Although any size wire between the minimum wire size and the maximum wire...