Page 560 - Yamawa_European_Catalogue_YEU23

Special Threads, Gauges

Intro
SITD

Inspection Tools
SP
Simple Thread Inspection Tools, Tandem Type

SL FEATURES
HSS HSS material increases considerably the gauge life.

PO

ST

ROLL

YMW-SITD
Product Features
CARBIDE - Under normal inspection procedure, the finished thread is checked by a 2-step
process, by using GP GO gauge first and then NP/WP NO-GO gauge.
Yamawa Thread Inspection Tool makes the thread inspection a 1-step 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
LONG pitch threads, smooth inspection becomes possible due to the step screw thread Cleaning groove
NOT-GO
features of SITD. GO part (GB-6H) part (NB-6H)
- What is the SITD?
Both GO part and NOT-GO part are embedded in one tool.
HAND
TAPS - Cleaning groove
Cleaning groove of the thread portion helps to remove the small particles left inside the
internal threads and hence allows a smooth and accurate inspection procedure.
EG (STI)

Accuracy of SITD
Simple pitch diameter tolerance, pitch tolerance and thread half angle tolerance, are 3 important factors on measuring internal screw threads. For SITD
SPECIAL and thread plug gauge these values are the same.
THREADS,
GAUGES Comparison between GB-6H/and GP-6H/thread plug gauge Comparison between NB-6H/and NP-6H/thread plug gauge
YMW
Tolerance Tolerance
Pitch Pitch
OD PD tolerance for thread OD PD tolerance for thread
THREAD half angle half angle
Size Size
MILLS
Basic Basic Basic Basic
size Max Min Tol. size Max Min Tol. (±) (±minute) size Max Min Tol. size Max Min Tol. (±) (±minute)
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
DIES
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
The pitch diameter is simple pitch diameter. Pitch tolerance includes error of thread lead.
CENTER 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,
DRILLS Yamawa has adopted the name "Simple Inspection Tool or SITD" instead of using the name "thread gauge".

Technical
info

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