Обший каталог Yamawa 2016 - 2017 - страница 714

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PD PD

MinMin

MinMin 100%

100%100%

MaxMax 78.2%

M2 Taps

M3 MaxMax Min

Taps Length of 74.1%78.2%

Max Length of engagement engagement=9.1mm On "middle" engagement class, 7H class can be chosen in case of "L" engagement length. Internal threads made by roll taps are

M4 different from those made by cutting Engagement Internal threads classification taps on the shape of minor dimameter.

Taps Engagement Unit : mm

length D1 Unit : mm

Engagement External threads *Hole size for thread forming taps

length classificationDrill sizeMinMax
(ref.)

M5 S Short engagement length 4H 5H — S 3(mm) Min Max

Bored hole size 5.0 4.917 5.153

Taps M Normal engagement length 5H 6H 7H 3 M 9(mm) 5.49 5.59

Engagement ratio92.4%100%78.2%
Forming condition changes depending

L Long engagement length 6H 7H 8H 9 L(mm)

P=1.0mm on workpiece's Material and shape. D1 is minor diameter of JIS 6H(2nd Class) of internal threads Above is for customer's reference. M6

Taps

Tolerance area of tap's pitch diameter

M8 Thread class of cutting taps 【Pitch diameter】 Taps

Diameter of imaginary cylinder or coneInternal threadsClassPD tolerance
which makes equal the width of threadsISO235μm〜 59μm
and width of space between the threads
M10ISO2X55μm〜 79μm

Taps ISO2ISO2 *Above shows the plus tolerance ISO2XISO2X by setting PD basic size as "0". M12

Width of Width of

Taps Thread class of roll taps

threadsthreads

PD tolerance Width of space Width of space Class
M789μm〜102μm between threadsbetween threads ISO2X
M1-
Tapsμ 〜 μ Pitch Pitch
m 127 m ISO3X 114
diameterdiameter
ISO2XISO2X *Above shows the plus tolerance
M24ISO3XISO3X by setting PD basic size as "0".
M9-
Taps
Basic size of pitch diameter
5.350mm
-M48+200μm +150μm +100μm +50μm -50μm -100μm -150μm -200μm
M25
Taps
← Roll taps ISO2X ISO3X
6g
For Unifiedthreads
Taps← ISO2 Tolerance of dies is the
Cutting taps target of external threads
ISO2X
Class of dies
For Whitworththreads〜 〜 Solid dies 6g
6g external threads(-138-26)6H internal threads(0150)
Taps

NRNR GRGR GPGP NPNP

For Pipe threads Relative position of PD tolerance area of external threads, internal threads, taps and gages. Taps

(–) ← Basic size of pitch diameter → (+)

For Pg threadsTaps

5.350mm

Unit : m Unit : m

Ring gage pitch diameter (for external threads inspection) Plug gage pitch diameter (for internal threads inspection)

NR6g -152 〜 -138 GR6g -35 〜 -21 GP6H 7 〜 17 NP6H 150 〜 160

NR : NOT GO ring gage GP : GO plug gage GR : GO ring gage NP : NOT GO plug gage Unit : mm Unit : mm Accuracy of external threads Accuracy of internal threads

Major diameter Pitch diameter Minor diameter Major diameter Pitch diameter Minor diameter

6g 5.794〜5.974 5.212〜5.324 − 6H − 5.350〜5.500 4.917〜5.153