Общий каталог Yamawa 2022 - 2023 - страница 999

Flowchart : M12 tapping
PD PD

Check 1
Boring before tapping


Engagement ratio on cutting taps


Engagement ratio on roll taps
Min


Internal threads
Min 100%
100%
Max 82.3%


Internal threads
M2


Internal threads
Ta
ps


M3
Min Max Ta
ps
Max
Length of
engagement=18.1mm 82.3%
74.1%
【Length of engagement】
On "middle" engagement class, 7H class can be chosen Internal threads made by roll taps are M4
in case of "L" engagement length. different from those made by cutting Ta
Internal threads
taps on the shape of minor dimameter. ps
Engagement Unit : mm
Symbol


Middle
Coarse


classification
d=12.0mm
Engagement
D1
Fine


Unit : mm
Engagement length External threads
length classification Drill size Min Max
*Hole size for thread forming taps
(ref.) M5
S Short engagement length 4H 5H − S≦6（mm） Min Max Ta
M Normal engagement length 5H 6H 7H 6＜M≦18（mm）
Bored hole size 10.3 10.106 10.441 11.09 11.23
ps

L Long engagement length 6H 7H 8H 18＜L（mm）
Engagement ratio 89.7% 100% 82.3% Forming condition changes depending
P=1.75mm D1 is minor diameter of JIS 6H(2nd Class) of internal threads on workpiece's Material and shape.
Above is for customer's reference. M6
Ta
ps

Tolerance area of tap's pitch diameter 【Thread class of cutting taps】
M8
Class PD tolerance Ta
ps
【Pitch diameter】
P2 20μｍ〜40μｍ
Diameter of imaginary cylinder or cone Internal threads
which makes equal the width of threads P3 40μｍ〜60μｍ
Check 2


and width of space between the threads M1
0
P4 60μｍ〜80μｍ Ta
ps
P2
P3 P5 80μｍ〜100μｍ
P4 *Above shows the plus tolerance M1
Width of P5 by setting PD basic size as "0". Ta 2
ps
threads 【Thread class of roll taps】
Width of space
Class PD tolerance M1
between threads Ta -M
Pitch G8 89μｍ〜102μｍ ps 8.5
Threading


diameter G9 102μｍ〜114μｍ
G8 *Above shows the plus tolerance M9
G9 by setting PD basic size as "0". Ta -M
ps 24

Basic size of pitch diameter
-200μm -150μm -100μm -50μm 10.863mm +50μm +100μm +150μm +200μm
M2
Ta 5-M
ps 48

Ⅱ G8 G9
P1
M5
Ta 0-M1
P2 P3 P4 P5 ps 00
Tolerance of dies is the P2
target of external threads
Fo
Class of dies 6g external threads(-184〜-34) 6H internal threads(0〜200) rU
thr nifie
e
NR GR GP NP Ta ads d
Ⅱ Solid dies ps
P1 Solid dies JIS 2Class external threads(-180〜-50) JIS 2Class intenal threads(0〜160) For
P2 for Auto Lathe WR GR GP WP
W
thr hitwo
e rth
Ta ads
ps
Relative position of PD tolerance area of external threads, internal threads, taps and gages.
For S
crew
on se threads
w us
Ta ing mach ed
(–) ← Basic size of pitch diameter → (+) ps（ ines
SM
）
10.863mm
Unit : μm Unit : μm For
P
Ta ipe thr
Ring gage pitch diameter(for external threads inspection) Plug gage pitch diameter(for internal threads inspection) ps ead
s
Check 3


NR6g -202 〜-184 GR6g -51 〜-33 GP6H 7 〜 17 NP6H 200 〜 210
For
WRⅡ -180 〜-172 GRⅡ -62 〜-54 GPⅡ 4 〜 12 WPⅡ 152 〜 160 A
pip meric
Gage check


e a
Ta thre n
NR : NOT GO ring gage GR : GO ring gage GP : GO plug gage NP : NOT GO plug gage ps ads
WR : NOT GO working ring gage WP : NOT GO working plug gage
For
Unit : mm Unit : mm M
thr iniatu
e
Accuracy of external threads Accuracy of internal threads Ta ads e
ps
r
Major diameter Pitch diameter Minor diameter Major diameter Pitch diameter Minor diameter
6g 11.701〜11.966 10.679〜10.829 − 6H − 10.863〜11.063 10.106〜10.441
JIS 2class 11.760〜11.950 10.683〜10.813 〜9.803 JIS 2class − 10.863〜11.023 10.106〜10.441


Sizes-35