HSS straight shank twist drill
1.HSS
2.surface treatment: Steam HOMO
3.20~30 degree helix angle for drill

HSS straight shank twist drill regular length

Materials: HSS
20~30°helix angle for drill
Tolerance of tool diameter is h8
118°point angle of drills
Up to 1.9 BRIGHT FINISH

Application:
Drilling in steels, cast steel alloyed and non-alloyed, grey castiron, malleable cast iron, graphite.
Surface treatment: Steam Homo(Black Oxide Finish)

Main details:
Drill diameter: 1~13mm
Flute length: 18~114mm
Overall length: 40~152mm