Technical Information Taps
Construction dimensions / designs
Style 1
d 2
Style
Illustration
l 2
ISO 529
JIS (J TYPE)
Style 2
Style 1
d 2
Reinforced Shank Taps
sq
l 1
l 3
l 2
l 2
sq
sq
l 1
Reduced
Shank Taps
Style 1
l 1
3
d 2
2
Style 4
Style 2
l 1 l 1
l 2
l 2
2
l 2
l 2
l 1
Style 5
Style 3 l 3
d 2
d 2
d d 2 2
Table below is in accordance with ISO8830 / DIN2197
sq
l 1
Style 6
Style 4
Form
A
TAPER
6 to 8
d 2
d 2
l 2 l 2
INTERMEDIATE
Style 5
sq
Number
of
threads
on lead
l 1 l 1
D
sq
sq
l 2 l 2
Chamfer
angle ( ≈ )
Style 5
5°
Hand or
d 2
straight
flutes
8°
l 1
Hand or
straight
d 2
E*
1.5 to 2
l 2
sq
l 1
l 1
B
INTERMEDIATE
Style 6
C
l 1
Use of this type is not recommended
sq
Hand or
straight
flutes
3
d 2
sq
sq
l 2
Main area of
application
l Illustration
1
sq
Style 6
Short through holes
sq
d 2
l 2
Generally for
through holes
Blind holes with very
short thread runout
sq
3.5 to 5 10° Straight, with
spiral point Through holes in
medium & long
chipping materials
2 to 3 15° Spiral
fluted Generally for
blind holes
d 2
BOTTOMING
l 2
d 2
23°
4 Lob
4 Lobe l
Style 6
l 2
464
l 3
l l 1 1
Style 5
3 Lobe
sq
sq
2
3 Lobe
1
l 2
3.5 to 5
l 3
BOTTOMING
*
l l
Type
of flute
1
l l 2
sq
sq
l 1
Style 6
Style 4
Chamfer Type / Length
l 1
d 2
d 2
d d 2
sq
sq
sq
sq
l 1
l 1
Style 6
Style 4
d d 2 2
l 1
l 1
Terminology
l 2
l 2
sq
sq
Style 5
Style 3 l 3
l 3
l 2
l 2