●产品描述:
Walter Titex Drill Sets
Walter Titex jobber drills are general purpose drills for steels, cast steel, grey cast iron, malleable cast iron, nickel brass, aluminium alloy and graphite.
With precision ground flutes and black finish (W-finish), this is the most common surface finish and is the result of a steam tempering operation in which steam is passed over the product during a controlled tempering cycle, producing a black oxide layer.
Black tools are generally recommended for ferrous applications where the oxide layer aids chip flow, helps to dissipate heat by retaining some coolant on the tool surface.
A1211 Series Drill 25 Piece Set HSS
Application: For materials forming long and short chips such as steel up to 1000 N/mm2, cast iron, malleable iron, sintered iron, German steel, AISi-alloys (Si 11%). Right hand cutting, straight shank, 118 point angle, steam oxide surface finish. Up to 3.00mm bright finish. Complete with metal case.
Point angle: 118.
Helix angle: normal.
Web thickness: standard.
Relief angle: 10-20.
Tolerance of diameter: h8.
Tolerance of shank: f11.
Manufactured to BS 328/DIN338RN.
Set contains: 1.0, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0, 4.5, 5.0, 5.5, 6.0, 6.5, 7.0, 7.5, 8.0, 8.5, 9.0, 9.5, 10.0, 10.5, 11.0, 11.5, 12.0, 12.5 and 13mm. In 0.5mm increments.