The tooth vernier caliper consists of vernier scale and two perpendicular arms. Digital caliper groove width for measuring width, distance of internal grooves and distance from groove to reference face. Gear tooth vernier caliper, spur gear of known module, surface plate. Using a vernier caliper provides accurate measurements, which is a definite advantage.
Vernier caliper, digital vernier caliper, different components. The caliper consists of two adjustable verniers, that reference two dimensions on the gear and provide a measurement. Fix gear tooth vernier calipers at theoretical value of. Tooth thickness measurement by gear tooth vernier duration. Now we can observe the gear tooth vernier caliper in horizontal scale of the caliper the main scale and vernier and now we can observe the vertical scale of the. On small pitch gears you may have to grind the outsides of the jaws away to prevent interference. The starrett 456 gear tooth vernier caliper is designed to measure in. Gear tooth caliper vernier gear tooth caliper digital remark. Allowance may be made for any error in blank size by adjusting. Colbourne, springerverlag, new york, 1987, 532 pages. Explain how it can be used for measuring the tooth thickness. This videos are captured for the benefit of nmamit mechanical. This document was uploaded by user and they confirmed. Tooth thickness is the arc distance measured along the pitch circle from its intercept.
Home ordnance documents and other related manuals gear tooth vernier caliper. Chordal thickness of the gear teeth at the pitch line. Tooth depth h and measure deviation between actual chordal tooth thickness s and its theoretical value. Describe the construction of gear tooth vernier caliper. What are the advantages and disadvantages of using a vernier caliper. This video lecture will teach you how to design spur gears for mechanical strength, dynamic load and surface durability. Digital caliper comparison mitutoyo brand name vs cheap brand duration. You can use a standard set of vernier calipers with a stop bar clamped on at the depth to obtain the pitch diameter. How to read the caliper vernier scale easily duration.
The methods which are used for measuring the gear tooth thickness is. A good set of gear calipers comes with a set of tables and a page of instructions. For the same purpose, it can also be used for measuring hobs, form and thread tools, etc. Gear tooth thickness varies from the tip of the base circle of the tooth, and the instrument is capable of measuring the thickness at a specified position on the tooth. The total number of division on vernier scale equally divided the minimum measurement of main scale and this is called the.
Gear tooth vernier caliper method in gear tooth vernier method the thickness is measured at the pitch line. For calibration of verniers, calipers, micrometers and depth gauges, time electronics 7151 includes gauge blocks and extras for comprehensive dimensional calibration. Reviewed by robert errichello this book is a true textbook on involute gears, the first since the. Gear tooth vernier caliper please do like our videos and subscribe our channel for more updates. To check the dimensional accuracy of gear teeth, use a gear tooth vernier caliper see fig. One of the benefits using a caliper is that the gear does not have to be removed from the machine.
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