Page 554 - Yamawa_European_Catalogue_YEU23

Special Threads, Gauges

Intro
SIT

Inspection Tools
SP
Simple Thread Inspection Tools

SL FEATURES
HSS HSS material increases considerably the gauge life.

PO

ST

ROLL

YMW-SIT
Product Features
CARBIDE - SIT can minimize the inspection process time 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.
LONG *ODMJOBUJPO
-What is the step screw thread?
-YAMAWA new thread gauge (for through hole) features a step screw thread on its end
allowing the gauge to enter easily the internal screw and work efficiently particularly
when checking fine pitches screw threads.
HAND 1JUDI EJBNFUFS PG GJSTU UISFBE QSPGJMF 1JUDI EJBNFUFS PG HBVHF UISFBE QSPGJMF
TAPS Note : Step screw thread is not applied to the gauge for blind hole (NP gauge) %FUBJMT PG TUFQ
TDSFX UISFBE

EG (STI) Accuracy of SIT
Simple pitch diameter tolerance, pitch tolerance and thread half angle tolerance, are 3 important factors on measuring internal screw threads. For SIT
and thread plug gauge these values are the same.
SPECIAL Comparison between GB-6H/and GP-6H/thread plug gauge Comparison between NB-6H/and NP-6H/thread plug gauge
THREADS,
GAUGES Pitch Tolerance Pitch Tolerance
YMW OD PD tolerance for thread OD PD tolerance for thread
half angle
half angle
Size Size
THREAD Basic Max Min Tol. Basic Max Min Tol. (±) (±minute) Basic Max Min Tol. Basic Max Min Tol. (±) (±minute)
size
size
size
size
MILLS
GB-6H NB-6H
M6×1 6.000 6.023 6.001 0.022 5.350 5.3675 5.3565 0.011 0.005 15 M6×1 5.7055 5.7165 5.6945 0.022 5.500 5.511 5.500 0.011 0.005 16
GP-6H NP-6H
M6×1 6.000 6.023 6.001 0.022 5.350 5.3675 5.3565 0.011 0.005 15 M6×1 5.7055 5.7165 5.6945 0.022 5.500 5.511 5.500 0.011 0.005 16
DIES
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".
CENTER
DRILLS

Technical
info

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