HSS Step Twist Drill Bits Sets

• Standard: DIN, JIS, AISI
• Length: Jobber-length
• Type: Twist Drill Bit
• Material: High Speed Steel
• Usage: Metal Drilling
• Size: 3mm to 20mm
• Model NO.: metric and inch
• Transport Package: Metal Box
• Specification: 3-32
• Trademark: stc
• Origin: Jiangsu
• HS Code: 82075090
• Production Capacity: 50000PCS/Month

Product Description

We make CBN ground 3 PCS step drill bits sets.

The step drill bits are made from high grade of high speed steel.

Tin coating and Tialn coating on request.

Metal box or blister card packing on request.

Size: 4-12, 4-20, 4-32.


 

STC001, HSS STEPS DRILL
Material: HSS.
Bright Finishing or Tin-coated.
	Pict
STC001A, INCH SIZES STEPS DRILL
No. of Holes	Description			Shank Diameter	Step Thickness
13	1/8" - 1/2" by 1/32" increase			1/4"	1/8"
6	3/16" - 1/2" by 1/16" increase			1/4"	3/8"
9	1/4" - 3/4" by 1/16" increase			3/8"	1/8"
12	3/16" - 7/8" by 1/16" increase			3/8"	1/8"
10	1/4" - 1.3/8" by 1/8" increase			1/2"	1/8"
STC001A, INCH SIZES STEPS DRILL
No. of Holes	Description				Shank Diameter
9	4 - 12mm by 1mm Increase				6/6.5mm
5	4 - 12mm by 2mm Increase				6/6.5mm
7	6 - 18mm by 2mm Increase				10mm
8	6 - 20mm by 2mm Increase				8mm
12	6 - 30mm by 2/3mm Increase				10mm
9	4 - 20mm by 2mm Increase				10mm
10	4 - 22mm by 2mm Increase				10mm
14	4 - 30mm by 2 mm increase				14mm
13	5 - 35mm by 2/3mm Increase				13mm
STC001-S, STEPS DRILL SET
	Pict
Model	pcs/set	DESCRIPTION		PACKING
STC001-S1	3pcs/set	4 - 12 x 9		Metal / wood / plastic
		4 - 20 x 9
		4 - 30 x 14
STC001-S2	3pcs/set	4 - 12 x 5		Metal / wood / plastic
		4 - 20 x 9
		4 - 32 x 15
STC001-S3	3pcs/set	4 - 12 x 9		Metal / wood / plastic
		6 - 20 x 8
		6 - 30 x 13
STC001-S4	3pcs/set	3/16" - 1/2" x 6		Metal / wood / plastic
		1/8" - 1/2" x 13
		1/4" - 3/4" x 9