Обший каталог Yamawa 2016 - 2017 - страница 703

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PD PD

MinMin

ℓ MinMin 100%

100%100% MaxMax 74.1% M2 Taps

P2 M3 MaxMax Taps Min

MaxLength of74.1%74.1%
P2engagement=3.1mm
Length of engagement
On "middle" engagement class, 7H class can be chosenM4
in case of "L" engagement length.Internal threads made by roll taps are
Engagementdifferent from those made by cuttingTaps
Internal threadstaps on the shape of minor dimameter.
classificationUnit : mm
Engagement

length D1 Unit : mm

Engagement External threads *Hole size for thread forming taps

length classificationDrill sizeMin
MaxM5
(ref.)

P1 P2 S Short engagement length 4H 5H — S 1(mm) Min Max

Bored hole size 1.6 1.567 1.679 Taps

M Normal engagement length 5H 6H 7H 1 M 3(mm) 1.79 1.84

Engagement ratio92.4%100%74.1%
Forming condition changes depending
LLong engagement length6H7H8H3 L(mm)
P=0.4mmon workpiece's Material and shape.
D1 is minor diameter of JIS 6H(2nd Class) of internal threadsM6
Above is for customer's reference.
Taps
1Tolerance area of tap's pitch diameterM8
2Thread class of cutting tapsTaps
【Pitch diameter】
3Internal threads ClassPD tolerance
Diameter of imaginary cylinder or cone
4which makes equal the width of threadsISO221μm〜36μmM10
Hand width of space between the threads
ISO2X36μm〜55μmTaps
H
ISO2ISO2*Above shows the plus tolerance
M5by setting PD basic size as "0".M12
ISO2XISO2X
M4Taps
Width of Width of
M3threadsthreadsThread class of roll taps
M1-M2width of space Width of spaceClass
PD toleranceM1-M
P6between threadsbetween threads7 μ 〜 μ
ISO2Xm m 64 51 Taps
P5Pitch Pitch
ISO3X64μm〜76μm
diameterdiameter
P4ISO2XISO2XM9-M
*Above shows the plus tolerance
P3ISO3XISO3X by setting PD basic size as "0".24 Taps
P2
P1Basic size of pitch diameterM25-M
1.740mm
+50μm -50μm -100μm -150μm +100μm48 +150μm Taps
S5
S3For Unified
ISO2X ISO3X← Roll taps threads
S1-S26g
N1＜Taps

Tolerance of dies is the ISO2 ←

N2 ＞ Cutting taps

target of external threads ISO2X For Whitworth

N3 Class of dies threads

6g6g external threads(〜)6H internal threads(〜)Taps
N4Solid dies-86-19090
NRGRGRGPNPNP

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

(–) ← Basic size of pitch diameter → (+) Taps 1.740mm

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

NR6g -96 〜 -86 GR6g -22 〜 -12 GP6H 2 〜10 NP6H 90 〜 98

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 − 〜 〜