Page 647 - Yamawa_European_Catalogue_YEU21

8. Internal Thread Tolerance and Classes of Taps

Intro

DIN EN 22857
DIN 802 Internal thread tolerance range SP
Denomination Characteristic
Class 1 ISO 1 4H 4H 5H - - -
Class 2 ISO 2 6H 4G 5G 6H - -
Class 3 ISO 3 6G - - 6G 7H 8H
SL
- - 7G - - - 7G 8G

PO
ISO
8H

ST
7H
6G

6H 5G
5H 4G ROLL
D D 2 min D2 max 4H
D 2 D 2 7H
D 1 6H
t
4H 0.5 t 0.7 t CARBIDE
0.3 t

Basic pitch diameter 0.1t
LONG

YAMAWA P CLASS HAND
TAPS

P:≤0.6 mm P:≥0.7 mm
μm Tol.: 15 μ μm Tol.: 20 μ EG (STI)
85
P5 100
70 P5 SPECIAL
P4 80
55 P4 THREADS,
P3 60 GAUGES
40 P3
P2 40
25 P2
P1 20 THREAD
10 P1
Basic pitch diameter Basic pitch diameter MILLS

DIES

ISO2X (6HX)
ISO3X (6GX) CENTER
p = 0.20 mm ~ 0.7 mm x = +15 μ DRILLS
p = 0.75 mm ~ 1.0mm x = +20 μ
p = 1.25 mm ~ 2.5 mm x = +25 μ
p = 2.50 mm ~ x = +30 μ
Technical
info

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