1.WELLCOME

2. PRESENTATION BY : ADNAN ASLAM ADNAN ROLL NO: 9801 CLASS: T.M.R - B Thread Terminology 3. WHAT IS THREAD ? ? ? The continuous helical groove on a screw or on the inner surface of a nut. 4. Uses of threads: AS TEMPORARY FASENTER FOR POWER TRANSMISSIOM 5. THREAD TERMS: MAJOR DIAMETER PITCH DIAMETER MINOR DIAMETER ANGLE OF THREAD DEPTH OF THREAD ROOT LEAD CREST FLANK PITCH 6. It is the largest diameter of an internal or external screw thread. It is also known as outside or nominal diameter. 7. It is the smallest diameter of an internal or external screw thread. It is also known as core or root diameter. 8. Angle of adjacent flanks measured at the cross-section of the screw thread- included the axis of the screw thread. 9. The height between the root and the crest vertically to the thread axis. 10. The bottom surface joining the two adjacent flanks. 11. The top surface joining the two flanks of a thread is called crest. 12. It is the distance from a point on one thread to the corresponding point on the next point. This distance to be measured parallel to the axis of the thread. 13. Thread face(excluding the root and crest). 14. 9. LEAD The distance covered by the nut in a single revolution on bolt parallel to the axis is called LEAD 15. COMPOSER: SUBJECT: CREDITS: ADNAN ASLAM ROLL NO:(9801) MACHINE DESIGN MT - 343 T.M.R ; B SESSION:(2009- 12) 16. LINE FOR SESSIONALS