Обший каталог Yamawa 2016 - 2017 - страница 530

SIT

Simple Thread Inspection Tools

Specification

For icon explanation, refer to P.50

TYPE：1 TYPE：2

■ Specification of SIT is available up to M48 (U1 3/4). For details, please contact us.

TYPE：3

TYPE：4 TYPE：5 TYPE：6

Product features

• SIT can minimize the jobs on inspection process and improve the inspection efficiency by adopting step screw thread.

●Premium HSS material extends the tool life dramatically. ●Tool for through hole or blind hole is available individually. ●Color case and color mark on the tool simplify tool storage control. Inclination

●What is the step screw thread ?

YAMAWA new thread gauge （for through hole） has the step screw thread on its

end where the whole profile of screw thread becomes incrementally larger.

Details of step

ー Due to this feature, the gauge enters easily the internal screw and works screw thread

efficiently particularly when checking the screw threads with fine pitches. Pitch diameter of first thread profile Pitch diameter of gauge thread profile

Note : Step screw thread is not applied to the gauge for blind hole（NP gauge）

Accuracy of SIT

In SIT, 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 SIT is same with that of thread gauge. But SIT 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 SIT" instead of using the name "thread gauge".