Обший каталог Yamawa 2016 - 2017 - страница 708

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PD PD )

Min Min 100% 100% Max 76.3%

M2 Taps

M3 MaxMax Min

TapsLength of76.3%
Max
Length of engagementengagement=6.1mm
On "middle" engagement class, 7H class can be chosen
M4in case of "L" engagement length.Internal threads made by roll taps are
Engagementdifferent from those made by cutting
Internal threads
classificationtaps 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 2(mm) Min Max

Bored hole size 3.3 3.242 3.422

Taps M Normal engagement length 5H 6H 7H 2 M 6(mm) 3.65 3.72

Engagement ratio 92.4% 100% 76.3%

L Long engagement length 6H 7H 8H 6 L(mm) Forming condition changes depending

P=0.7mm 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

Internal threadsClassPD tolerance
Diameter of imaginary cylinder or cone
which makes equal the width of threadsISO229μm〜 48μm
and width of space between the threads
M10ISO2X44μm〜 63μm

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

Width of Width of

Taps

threadsthreads Thread class of roll taps

Width of space Width of space

Class PD tolerance

M7 between threadsbetween threads μ 〜 μ

M1-ISO2X7689 m m
TapsPitch Pitch
diameterdiameterISO3X89μm〜102μm
ISO2XISO2X*Above shows the plus tolerance
M24ISO3XISO3Xby setting PD basic size as "0".
M9-
Taps
Basic size of pitch diameter
3.545mm
-M48-200μm-100μm -150μm -50μm+100μm +50μm+150μm+200μm

M25 Taps ← Roll taps 6g ISO2X ISO3X

For Unifiedthreads

TapsTolerance of dies is theISO2←
Cutting taps
target of external threadsISO2X
Class of dies

For Whitworththreads 〜 〜

6gSolid dies6g external threads(-112-22)6H internal threads(0118)
Taps
NRNRGRGRGPNPNP

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

3.545mm

Unit : m Unit : m

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

NR6g -126 〜 -112 GR6g -31 〜 -17 GP6H 2 〜 10 NP6H 118 〜 126

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 〜 〜 − 6H − 〜 〜