Page 696 - Yamawa_European_Catalogue_YEU21

17. Taps for Pipe Threads

Intro

Comparison of the thread limit of taper pipe tap Unit mm
SP

LU Basic diameter position LU Basic diameter position LU Basic diameter position
SL

THL THL THL

PO

ha : upper deviation
ST

ha
ROLL
P = 25.4/n hd
n = Number of threads

CARBIDE hd : upper deviation
Taper
hd : lower deviation

Axis of tap
LONG

HAND
TAPS Comparison of the thread limit of taper internal pipe taps Unit: mm
ISO (Rc) Appendix (PT) Thread Limit
Basic major Number of
Size Dia. of Threads Thread Basic PT Threads S-PT Thread ha hd
Gauge Plane (per inch) Length Diameter Thread Basic Diameter Thread Basic Diameter Basic Size Basic Size
EG (STI) Position Length Position Length Position (mm) Tolerance (mm) Tolerance
r 7.723 28 14 10.1 - - - - 0.291 0-30 0.291 ±15
e 9.728 28 15 10.1 19 13 16.5 10.5 0.291 0-30 0.291 ±15
w 13.157 19 19 15 28 21 19.5 12.5 0.428 0-40 0.428 ±20
SPECIAL y 16.662 19 21 15.4 28 21 21 14 0.428 0-40 0.428 ±20
THREADS,
GAUGES q 20.955 14 26 20.5 35 25 27 17 0.581 0-50 0.581 ±25
t 26.441 14 28 21.8 35 25 29 19 0.581 0-50 0.581 ±25
1 33.249 11 33 26 45 32 35 22 0.740 0-60 0.740 ±30
THREAD 1 w 41.910 11 36 28.3 45 32 37.5 24.5 0.740 0-60 0.740 ±30
MILLS 1 q 47.803 11 37 28.3 45 32 38.5 25.5 0.740 0-60 0.740 ±30
2 59.614 11 41 32.7 50 35 42.5 27.5 0.740 0-60 0.740 ±30
2 q 75.184 11 45 37.1 - - - - 0.740 0-60 0.740 ±30
3 87.884 11 148 40.2 - - - - 0.740 0-70 0.740 ±35
DIES 4 113.030 11 53 46.2 - - - - 0.740 0-70 0.740 ±35

CENTER
DRILLS

Technical
info

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