Preholes - Bordignon DTAP 1 Instruction Manual

Direct Drive tapping unit with touch screen multiple control panel
Preholes for cold forming threading
THrEAD PITCH
m2
0,40
m3 0,50
m3.5 0,60
m4
0,70
m5 0,80
m6 1,00
m8
1,25
m10 1,50
Use cold forming threading oil only
For inox or high resistance steel, increase the prehole of 0,05 mm
TAP TOLErANCE
(min. suggested Ø)
ISO2 (6H)
ISO3 (6G)
ISO2 (6H)
ISO3 (6G)
ISO2 (6H)
ISO3 (6G)
ISO2 (6H)
ISO3 (6G)
ISO2 (6H)
ISO3 (6G)
ISO2 (6H)
ISO3 (6G)
ISO2 (6H)
ISO3 (6G)
ISO2 (6H)
ISO3 (6G)
PrEHOLE
mild materials
1,85
1,85
2,80
2,80
3,25
3,25
3,70
3,70
4,65
4,65
5,60
5,65
7,45
7,50
9,35
9,40
rPm
rPm
inox/high tensile
streght mat.
3500 1750
3000 1500
2800 1400
2500 1200
2000 900
1500 700
1000 500
800 400
30