China HSS Step Drills

HSS STEP DRILLS
HSS Step Drills for drilling cylindrical holes in solid material up to a thickness of 4 ~ 5mm.
Burr-free and vibration-free drilling.
The tapered cutting edges of the next drill step can be used for simultaneous deburring or chamfering of the finished bore at the same time.
Drilling perfectly round holes in steel, brass, copper, aluminum, wood and plastic.
Drills up to 13 holes sizes with one bit.
Ideal tool for sheet metal workers, electrical contractor, auto mechanics, and general contractors.
Surface treatment available: White Finish, Black Oxide, Titanium Coated, Cobalt Coated, TiALN Coated

Size RangeStep No.Shank Size4 - 12mm x 2mm56mm4 - 12 mm x 1mm96mm4 - 20mm x 2mm98mm4 - 22mm x 2mm108/10mm4 - 30mm x 2mm1410mm4 - 32mm x 2mm1510mm4 - 39mm x 2-3mm1410mm5 - 28mm710mm5 - 28.3mm1010mm5 - 35mm x 2-3mm1313mm6 - 18mm x 2mm710mm6 - 20mm x 2mm810mm6 - 24mm x 2mm1010mm6 - 25mm710mm6 - 26.75mm810mm6 - 30mm x 2mm1310mm6 - 30.5mm1010mm6 - 32mm810mm6 - 32mm910mm6 - 37mm1210mm6 - 38mm1210mm6 - 40mm1613mm9 - 36mm x 3mm1012mm10 - 20mm x 1mm1110mm12 - 20mm x 1mm910mm12.5 - 30.5mm712mm13 - 38mm1012mm14 - 24mm x 2mm613mm14 - 25mm713mm20 - 30mm x 1mm1113mm20 - 34mm x 2mm813mm30 - 40mm x 1mm1113mm40 - 50mm x 1mm1113mm50 - 60mm x 1mm1113mm5 - 30.5mm1312mm5 - 38mm1412mm