PITCH AND LEAD OF SCREW THREAD. The terms " pitch " and " lead " of screw threads are often confused. The pitch of a screw thread is the distance from the center of one thread to the center of the next thread, whether the screw has a single, double, triple,... Text Book of Mechanical Drawing ... - Page 80by John S. Rooke - 1902 - 88 pagesFull view - About this book
| Peder Lobben - Mechanical engineering - 1899 - 460 pages
...center of one thread to the center of the next, but in a triple-threaded screw the lead is three times the distance from the center of one thread to the center of the next. Screw Cutting by the Engine Lathe. When the stud and the spindle run at the same speed ( which they... | |
| Peder Lobben - Mechanical engineering - 1899 - 460 pages
...of length; but it might more correctly be said to be a screw of ^f-inch pitch, because it is ^-inch from the center of one thread to the center of the next. The "lead" of a worm or a screw means the advancement of the thread in one complete revolution ; therefore,... | |
| Mechanical engineering - 1900 - 428 pages
...multiply this by 3.1416 to get the circumference at this point. Divide the pitch of the spiral, ie, the distance from the center of one thread to the center of the next thread in a single-threaded tap, by this circumference and the result will be the tangent of the angle.... | |
| 1924 - 518 pages
...the ink reservoir. Screws on some bench vises are multiple threaded. Pitch. The pitch of a thread is the distance from the center of one thread to the center of the next, measured in a line parallel to the axis of the screw, or nut. Pitch is written "P." A screw having,... | |
| Stanley Holmes Moore - Machine-shop practice - 1908 - 536 pages
...sense and in the sense in which it should always be used in referring to screw threads, "pitch" is the distance from the center of one thread to the center of the next thread, measured in a line parallel to the axis of the screw. The "threads to the inch" and "thread... | |
| Philippines. Bureau of Education - Education - 1910 - 198 pages
...i i i .j < „ — 02 — i— -Oi$— ' 'ft- 4 .196 13 x .013 99 100 By the term "pitch" is meant the distance from the center of one .thread to the center of the next, measured parallel to the axis of the bolt. Fig. B shows the "conventional method" of representing bolt... | |
| Robert Henry Smith - Machine-shop practice - 1910 - 408 pages
...See Multiple Threads, § 622. 211. The pitch of a thread is the distance along the axis of the work from the center of one thread to the center of the next, as P, Fig. 141. 212. The lead of a thread is the distance the screw advances in one revolution. In... | |
| Frank Elliott Mathewson, Judson Lloyd Stewart - Mechanical drawing - 1911 - 176 pages
...pieces to be easily disconnected when necessary." ( Unwin- Machine Design) The pitch of a screw is the distance from the center of one thread to the center of the next thread, measured parallel to the axis of the screw. The lead of a screw is the distance its nut would... | |
| Machine-shop practice - 1913 - 240 pages
...and the work to be cut. If, for example, we have to make a thread of 1 1/4-in. pitch, or 1 1/4 in. from the center of one thread to the center of the next, we can proceed as follows: As the threads of the lead screw are 1/4 in. apart, it is very evident that... | |
| William Henry Dooley - Mathematics - 1915 - 364 pages
...in line with this portion and then count the number of threads within the oneinch line. Pitch. — The distance from the center of one thread to the center of the next thread, measured in a line parallel to the axis, is the pitch of the thra'd, or the thread-pitch. Divide... | |
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