Al - JW Donchin CO.

A227
● Centre Drill ● Zentrierbohrer ● Centerboren
● Foret à centrer ● Brocas de Centrar ● Broca de Centrar
A227
Bell Type Protected Form / Form B mit Schutzsenkung / Beschermd centergat, Type Bell / Chanfrein de protection en forme de cloche
/ Forma Tipo B protegida / Tipo Sino, Forma protegida
■
●
d 1
Ø
Inch
d 1
decimal
Inch
l 2max/min
Nr.
Inch
Inch
e-Code
1 3/64 0.0468 5/64 - 1/16 1.1/2 1/8 0.0750 A227N1
2 1/16 0.0625 3/32 - 5/64 1.3/4 3/16 0.1120 A227N2
3 3/32 0.0937 5/32 - 1/8 2“ 1/4 0.1500 A227N3
4 7/64 0.1093 3/16 - 5/32 2.1/4 5/16 0.1880 A227N4
4A 1/8 0.1250 3/16 - 5/32 2.1/2 3/8 0.2250 A227N4A
5 5/32 0.1562 1/4 - 7/32 2.1/2 7/16 0.2620 A227N5
5A 3/16 0.1874 9/32 - 1/4 2.3/4 1/2 0.3000 A227N5A
6 7/32 0.2187 11/32 - 9/32 3“ 5/8 0.3750 A227N6
7 1/4 0.2500 13/32 - 11/32 3.1/2 3/4 0.4500 A227N7
l 1
d 2
Ø
Inch
d 3
Ø
Inch
169