Page 67 - HOLE_MAKING_CATALOG_INCH_2022_P373-P446
P. 67
USER GUIDE
TAPS
Tap Nomenclature (Regrinding)
A A γ 1
β
∆
d3 di dm d1
φ
A-A
P
α
A
B γ
S
Δ 1
T
ε
d5
B-B
B
d1 Major diameter
dm Flank diameter
di Minor diameter
d3 Chamfer diameter
P Pitch
α Flank angle
ß Chamfer angle
φ Gun nose angle
γ Gun nose front rake angle
Δ Chamfer relief
Δ 1 Pitch diameter relief on the land
γ1 Rake angle
T Width of land
S Flute width
d5 Web thickness
ε Angle of spiral flute
439
