Inch Size HSS Step Drill Bit Straight Flute

HSS STEP DRILLS

Drilling perfectly round holes in steel, brass, copper, aluminum, wood and plastic.

Drills up to 15 holes sizes with one bit.

Surface treatment available: White Finish, Black Oxide, Titanium Coated, Cobalt Coated, TiALN Coated

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.

Name: Inch HSS Straight Flute Step Drill Bit
Standard: Inch Sizes
Material: HSS 4241, HSS 6542 (M2), HSS M35 (Cobalt 5%)
Surface color: Tin-coated, black&golden
Point angle: 135°
Shank: Triangle shank, 1/4" hex shank

Size:
3/16~1/2": 6 steps; 3/16, 1/4, 5/16, 3/8, 7/16, 1/2
1/8~1/2": 13 steps; 1/8, 5/32, 3/16, 7/32, 1/4, 9/32, 5/16, 11/32, 3/8, 13/32, 7/16,15/32,1/2
1/4~3/4": 9 steps; 1/4, 5/16, 3/8, 7/16, 1/2, 9/16, 5/8, 11/16, 3/4"
3/16~7/8": 12 steps; 3/16, 1/4, 5/16, 3/8, 7/16, 1/2, 9/16, 5/8, 11/16, 3/4, 13/16, 7/8"
1/4~1-3/8": 10 steps; 1/4, 3/8, 1/2, 5/8, 3/4, 7/8, 1, 1-1/8, 1-1/4, 1-3/8