Page 5 - Threading_Handbook

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Introduction

A lot of things around us, whether it be everyday objects or industrial products,
have a thread connection. The history of thread connections began many years ago. INTRODUCTION

The first fastening parts with threads were used in ancient Rome.
However, due to the high cost, they were only used for jewelry, medical instruments and
other expensive products.

Bolts and nuts were widely used in the 15th century. They connected the mobile
segments of armor and parts of watch mechanisms. The first printing machine, invented
by Johannes Gutenberg between 1448 and 1450, had threaded connections - its parts
were fastened with screws.
At the beginning of the 17th century, a threaded connection appeared similar to the type
found today. Initially, the thread pitch was only in inches until the French introduced the
metric thread only at the beginning of the 19th century.
At the present time, parts with threads are widely used in many different industries.

What is a Thread?
A thread is a surface formed by a helical movement of a flat contour along a helical
line. The basis of threading is the principle of obtaining a helix. There are many different
standards, types and ways of producing threads. In many cases, the thread process
occurs in the final stages of manufacturing the part, thereby occupying a responsible role
for obtaining quality parts. The key to high quality and efficient thread processing is a
correct and well-composed technological process.

The assigned thread machining strategy is directly related to the correct selection of
the cutting tool. It is the tool, a small and seemingly minor element in the production of
threads that can significantly increase productivity and quality. ISCAR understands the
role of the tool, particularly in threading and metal processing in general, and aims to
provide our customers with a reliable tool that will meet their requirements.

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