Bolt Thread
Abstract
Bolt thread experiment was conducted to examine the major diameter, minor diameter, angle and the pitch of the bolt thread. Other than that, the purpose of this experiment is to compare the measured data with the standard thread from literature. The experiment was carried out by taking the measurement using optical projector. The shadow or the image of the bolt is traced and magnified on the broad of the optical profile projector. The crest and the toot of the bolt thread were picked to lie on the horizontal line on the broad of the optical comparator. The measurements were repeated to improve the accuracy of measurements.
Introduction/Theoretical background
Bolt is a metal pin with a head at one end and a thread at the other end. A bolt is an externally threaded fastener that is inserted through holes on the parts that are screwed into a nut on the opposite site.
Screw thread
There is no other device in the entire field of mechanic that can compare with the screw thread. Highly adapted and extremely versatile, therefore it has become an indispensable unit in our daily life. It takes a moment’s reflection to appreciate the utter dependence of our society upon this simple item. Our wonderfully industrialized civilization is built upon the machine. And the generic term machine encompasses all manner of invention and mechanisms which are in turn, based upon the six fundamental “machines”, they are; the inclined plane, the wedge, the screw, the lever, the wheel and the pulley.
Thread has been utilized for holding parts together, making adjustment to tools and instruments. The thread also is used to transmitting power and motions for hundreds of years. Screw, inclined plane and the wedge are fundamentally related. A thread is the wrapping for the wedge around a cylinder in a spiral, thereby creating a helix or rudimentary screw. Today, threads are mass-produced by tops, dies, thread rolling, thread milling and grinding to exacting standards of an
Bolt thread experiment was conducted to examine the major diameter, minor diameter, angle and the pitch of the bolt thread. Other than that, the purpose of this experiment is to compare the measured data with the standard thread from literature. The experiment was carried out by taking the measurement using optical projector. The shadow or the image of the bolt is traced and magnified on the broad of the optical profile projector. The crest and the toot of the bolt thread were picked to lie on the horizontal line on the broad of the optical comparator. The measurements were repeated to improve the accuracy of measurements.
Introduction/Theoretical background
Bolt is a metal pin with a head at one end and a thread at the other end. A bolt is an externally threaded fastener that is inserted through holes on the parts that are screwed into a nut on the opposite site.
Screw thread
There is no other device in the entire field of mechanic that can compare with the screw thread. Highly adapted and extremely versatile, therefore it has become an indispensable unit in our daily life. It takes a moment’s reflection to appreciate the utter dependence of our society upon this simple item. Our wonderfully industrialized civilization is built upon the machine. And the generic term machine encompasses all manner of invention and mechanisms which are in turn, based upon the six fundamental “machines”, they are; the inclined plane, the wedge, the screw, the lever, the wheel and the pulley.
Thread has been utilized for holding parts together, making adjustment to tools and instruments. The thread also is used to transmitting power and motions for hundreds of years. Screw, inclined plane and the wedge are fundamentally related. A thread is the wrapping for the wedge around a cylinder in a spiral, thereby creating a helix or rudimentary screw. Today, threads are mass-produced by tops, dies, thread rolling, thread milling and grinding to exacting standards of an
References: Websites 1. http://www.britishmetrics.com/bswstd_1.htm 2. http://mdmetric.com/tech/thddat8.htm 3. http://www.engineeringtoolbox.com/metric-threads-d_777.html