Общий каталог Yamawa 2022 - 2023 - страница 696

JIS SITD

Simple Thread Inspection Tools,

Tandem Type

Specification

Product Features

• The SITD has two "screw threaded portions" in an integrated shape on one guage. It has sections for Go threads and Not Go threads combined, thus it can be used in a continuous measurement of the GO (GP) and the NOT GO (NP / WP) with one plug gauge. It is an inspection tool that can be completed in one

Chip groove GO portion Not GO

measurement. portion ●SITD is installed in a screw tightening machine when used.

• For use with small diameter fine pitch threads. Smooth measurement can be carried out by using the stepped thread even for screw inspection that is difficult to insert.
• To ensure accurate inspection, it is mandatory to remove all small debris in the inside of the internal thread before inserting the guage into the thread thus, the chip groove end part is used for this purpose.

The accuracy of the SITD

The single pitch diameter tolerance, the pitch tolerance and the threads half angle

allowance are all important in the accurate measurement of an internal screw thread. The SITD gauges are manufactured to the same accuracy as that of a thread plug gauge. ■ Comparison between the GO screw thread "GB-6H" ■ Comparison of NOT GO thread portion "NB-6H" and

The pitch diameter is a single pitch diameter tolerance. The pitch diameter is a single pitch diameter tolerance. The tolerance of the pitch also includes the deviation of the lead. The tolerance of the pitch also includes the deviation of the lead. * The screw thread precision is the same as a thread gauge, but since some of the specifications like length of screw thread portion and the relief shape of the thread root are originated by YAMAWA. Therefore, these gauges are not to be called "thread gauge" and distinguished as "simple inspection tools for internal screw threads". The SITD is distinguished as a simple inspection tool of internal screw threads.