HSS Step Drill Bit

• Customization: Available
• Customized: Customized
• Length: Jobber-length
• Model NO.: 30601
• Type: Countersink Drill Bit
• Material: High Speed Steel
• Usage: Metal Drilling
• Surface: Bright Fully Ground, Titanium Coated
• Transport Package: Blistar Card, Plastic Tube, Bag
• Specification: almost popular size
• Trademark: OEM or OSTAR
• Origin: Shanghai
• HS Code: 820750900
• Production Capacity: 100000PCS Each Month

Product Description

HSS Step Drill Bits
 

Spiral Flute Step Drill Bit,  Step Drills (Straight Flute), Step Drills Set. Such as: 3pcs Setp drills, packing with metal box, wooden box, double blister 

(1) Stright Flute / Spiral Flute
4-12mm x 9 steps
4-20mm x 9 steps 
4-30mm x 14 steps
4-32mm x 15 steps 
6-20mm x 8 steps
6-30mm x 13 steps
6-30.5mm x 10 steps
6-32mm x 9 steps
3/16"-1/2" x 6 steps
1/8"-1/2" x 13 steps
1/4"-3/4" x 9 steps
3/16"-7/8" x 12 steps
7/16"-1-1/8" x 12 steps
1/4" - 1-1/2" x 11 steps
1/2" - 1" x 9 steps
9/16" - 1" x 8 steps
3/4" - 1-3/8" x 11 steps
13/16" - 1-3/8" x 10 steps

(2) Shank: 
Round shank; 
Hex shank; 
Three flat shank; 
Hex quick change shank;

(3) Surface:
white bright;
Titanium coated;
Black nitrided;
Cobalt coated;

(4) 3pcs Step Drills Set
3/16 - 1/2 x 6 step
1/8 - 1/2 x 13 step
1/4 - 3/4 x 9 step
4 - 12mm x 9 step
4 - 20mm x 9 step
4 - 30mm x 14 step
 
4 - 12mm x 9 step
6 - 20mm x 8 step
6 - 30mm x 13 step
Packing: (a) wooden box. (b) aluminum case. (c) blister with card.

Applications:
Step Drill Bits are perfect for drilling multiple-size holes in thin sections of metal, plastic and wood using a single bit. Each step drills does the work of many drill-bit sizes. Drills round holes in most metals (steel, brass, aluminum, copper) up to 1/8" (3.2mm) thick as well as in plastic and wood. No center punching or pilot hole drilling is required on most sizes. The bits are easy to keep sharp, and the hole size is easily determined by the diameter markings that are permanently laser-etched in the flute areas.
 
Product Size:

Art No.	Size Range	steps	Shank Size
30601001	3/16"-1/2"	6step	1/4"
30601002	1/8"-1/2"	13step	1/4"
30601003	1/4"-3/4"	9step	3/8"
30601004	3/16"-7/8"	12step	3/8"
30601005	7/16"-11/8"	12step	3/8"
30601006	1/4"-11/2"	11step	1/2"
30601007	1/2"-1"	9step	3/8"
30601008	9/16"-1"	8step	3/8"
30601009	3/4"-13/8"	11step	1/2"
30601040	3/8"-1/2"	2step	1/4" with 3 flats
30601041	7/8"	1step	3/8" with 3 flats
30601042	7/8"-11/8"	2step	3/8" with 3 flats

 

Art No.	Size	Steps	Shank Size
30601011	4 - 12mm	5 step	6mm/6.5mm
30601012	4 - 12mm	9 step	6mm/6.5mm
30601013	4 - 20mm	9 step	8mm
30601014	4 - 22mm	10 step	8mm
30601015	4 - 30mm	14 step	10mm
30601016	4 - 39mm	14 step	10mm
30601017	5 - 35mm	13 step	13mm
30601018	6 - 18mm	7 step	10mm
30601019	6 - 20mm	8 step	10mm
30601020	6 - 24mm	10 step	10mm
30601021	6 - 32mm	8 step	10mm
30601022	14 - 24mm	6 step	13mm
30601023	14 - 25mm	7 step	13mm
30601024	20 - 34mm	8 step	13mm
30601025	10 - 20mm	11 step	10mm
30601026	20 - 30mm	11 step	13mm
30601027	5 - 28.3mm	10 step	10mm
30601028	6 - 30mm	13 step	10mm
30601029	6 - 38mm	12 step	10mm
30601030	6 - 26.75mm	7 step	10mm
30601031	6 - 39mm	12 step	10mm
30601032	6 - 37mm	12 step	10mm
30601033	6 - 32mm	9 step	10mm
30601034	6 - 40mm	16 step	13mm
30601035	4 - 32mm	15 step	10mm

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