Обший каталог Yamawa 2016 - 2017 - страница 536

SITD

（Tandem Type）

Simple Thread Inspection Tools, Tandem Type

Specification

For icon explanation, refer to P.50

TYPE：1 TYPE：2

Product features

• Under normal inspection procedure, the finished thread is checked by a 2- time process, that is, by using GP GO gauge and then by using NP/WP NO-GO gauge. By using Yamawa Thread Inspection Tool, the thread inspection can be done in one single process.

●SITD, attached to a measuring machine, enables the mechanical measuring.

• Even in difficult-to-insert thread inspection such as checking smaller sizes and/or finer pitch threads, smooth inspection becomes possible due to the step screw thread mechanism adopted to SITD.

●What is the 「SITD」?

Both GO part and NOT-GO part are embedded in one tool.

●Cleaning groove

Cleaning groove of the thread portion helps to remove the small

dirts left inside the internal threads and hence allows for the

Cleaning groove GO part (GB-6H) NOT-GO

proper inspection procedure. part (NB-6H)

Accuracy of SITD

In SITD, tolerance of simple pitch diameter, pitch tolerance and tolerance of thread

half angle, 3 important factors on measuring internal screw threads, are same with

those of thread plug gauge.

■Comparison between GB-6H/and GP-6H/thread plug gauge ： ■Comparison between NB-6H/ and NP-6H/thread plug gauge ：

unit mm unit mm Tolerance Tolerance Pitch Pitch

OD PD for thread OD PD for thread

tolerance tolerance

Size half angle Size half angle

Basic Basic （±） （± ） Basic Basic （±） （± ）

Max Min Tolerance Max Min Tolerance minute Max Min Tolerance Max Min Tolerance minute

size size size size

GB-6H NB-6H

• 6.000 6.023 6.001 0.022 5.350 5.3675 5.3565 0.011 0.005 15
• 5.7055 5.7165 5.6945 0.022 5.500 5.511 5.500 0.011 0.005 16

M6 1 M6 1

GP-6H NP-6H

• 6.000 6.023 6.001 0.022 5.350 5.3675 5.3565 0.011 0.005 15
• 5.7055 5.7165 5.6945 0.022 5.500 5.511 5.500 0.011 0.005 16

M6 1 M6 1

The pitch diameter is simple pitch diameter. Pitch tolerance includes error of thread lead. The pitch diameter is simple pitch diameter. Pitch tolerance includes error of thread lead. ※ Main specification of SITD is same with that of thread gauge. But SITD has partly Yamawa's own design in the length of thread and bottom part relief. Due to these features, Yamawa has adopted the name "Simple Inspection Tool or SITD" instead of using the name "thread gauge".