Best M42 Cobalt Drill Bits

3 Steps Design M42 Co8% Cobalt Drill Bits for Stainless Hard Metal

Top-quality drill bit that can handle even the toughest materials.
Made from premium M42 8% cobalt steel.
Make it ideal for repeated use.
It also features a three-step design for cutting through stainless steel, hard metals, aluminum, and plastic.
Despite its higher price tag, the cobalt drill bit is actually more cost-effective

Product Details
Factory
Material

Product Description
More Choice For You: Home > Cobalt Drill Bit
Product Name	3 Steps Design M42 Co8% Cobalt Drill Bits for Stainless Hard Metal
Size	1-13mm
Material	M35 (Co5%), M42 (Co8%)
Flute Type	Single Flute
Shank	Round Shank (We also Have Reduced Shank, Taper Shank, Hex Shank)
Surface Finish	Amber (We also have Black Oxide)
Package	10 or 5pcs in One Plastic Box

Product Size
DIN338
Diameter(mm)	Flute Length(mm)	Overall Length(mm)	Diameter(mm)	Flute Length(mm)	Overall Length(mm)
0.5	6	22	9.5	81	125
1.0	12	34	10.0	87	133
1.5	20	43	10.5	87	133
2.0	24	49	11.0	94	142
2.5	30	57	11.5	94	142
3.0	33	61	12.0	101	151
3.2	36	65	12.5	101	151
3.5	39	70	13.0	101	151
4.0	43	75	13.5	108	160
4.2	43	75	14.0	108	160
4.5	47	80	14.5	114	169
4.8	52	86	15.0	114	169
5.0	52	86	15.5	120	178
5.2	52	86	16.0	120	178
5.5	57	93	16.5	125	184
6.0	57	93	17.0	125	184
6.5	63	101	17.5	130	191
7.0	69	109	18.0	130	191
7.5	69	109	18.5	135	198
8.0	75	117	19.0	135	198
8.5	75	117	19.5	140	205
9.0	81	125	20.0	140	205
Jobber Length Fraction
Diameter (Inch)	Flute Length(Inch)	Overall Length(mm)	Diameter (Inch)	Flute Length(Inch)	Overall Length(mm)
3/64″	3/4″	1-3/4″	25/64″	3-3/4″	5-1/8″
1/16″	7/8″	1-7/8″	13/32″	3-7/8″	5-1/4″
5/64″	1″	2″	27/64″	3-15/16″	5-3/8″
3/32″	1-1/8″	2-1/4″	7/16″	4-1/16″	5-1/2″
7/64″	1-1/2″	2-5/8″	29/64″	4-3/16″	5-5/8″
1/8″	1-5/8″	2-3/4″	15/32″	4-5/16″	5-3/4″
9/64″	1-3/4″	2-7/8″	31/64″	4-3/8″	5-7/8″
5/32″	2″	3-1/8″	1/2″	4-1/2″	6″
11/64″	2-1/8″	3-1/4″	33/64″	4-13/16″	6-5/8″
3/16″	2-5/16″	3-1/2″	17/32″	4-13/16″	6-5/8″
13/64″	2-7/16″	3-5/8″	35/64″	4-13/16″	6-5/8″
7/32″	2-1/2″	3-3/4″	9/16″	4-13/16″	6-5/8″
15/64″	2-5/8″	3-7/8″	37/64″	4-13/16″	6-5/8″
1/4″	2-3/4″	4″	19/32″	5-3/16″	7-1/8″
17/64″	2-7/8″	4-1/8″	39/64″	5-3/16″	7-1/8″
9/32″	2-15/16″	4-1/4″	5/8″	5-3/16″	7-1/8″
19/64″	3-1/16″	4-3/8″	41/64″	5-3/16″	7-1/8″
5/16″	3-3/16″	4-1/2″	21/32″	5-3/16″	7-1/8″
21/64″	3-5/16″	4-5/8″	43/64″	5-5/8″	7-5/8″
11/32″	3-7/16″	4-3/4″	11/16″	5-5/8″	7-5/8″
23/64″	3-1/2″	4-7/8″
3/8″	3-5/8″	5″
Jobber Length Number
Diameter	Flute Length(Inch)	Overall Length(mm)	Diameter	Flute Length(Inch)	Overall Length(mm)
1#	2-5/8″	3-7/8″	31″	1-5/8″	2-3/4″
2#	2-5/8″	3-7/8″	32″	1-5/8″	2-3/4″
3#	2-1/2″	3-3/4″	33″	1-1/2″	2-5/8″
4#	2-1/2″	3-3/4″	34″	1-1/2″	2-5/8″
5#	2-1/2″	3-3/4″	35″	1-1/2″	2-5/8″
6#	2-1/2″	3-3/4″	36″	1-7/16″	2-1/2″
7#	2-7/16″	3-5/8″	37″	1-7/16″	2-1/2″
8#	2-7/16″	3-5/8″	38″	1-7/16″	2-1/2″
9#	2-7/16″	3-5/8″	39″	1-3/8″	2-3/8″
10#	2-7/16″	3-5/8″	40″	1-3/8″	2-3/8″
11#	2-5/16″	3-1/2″	41″	1-3/8″	2-3/8″
12#	2-5/16″	3-1/2″	42″	1-1/4″	2-1/4″
13#	2-5/16″	3-1/2″	43″	1-1/4″	2-1/4″
14#	2-3/16″	3-3/8″	44″	1-1/8″	2-1/8″
15#	2-3/16″	3-3/8″	45″	1-1/8″	2-1/8″
16#	2-3/16″	3-3/8″	46″	1-1/8″	2-1/8″
17#	2-3/16″	3-3/8″	47″	1″	2″
18#	2-1/8″	3-1/4″	48″	1″	2″
19#	2-1/8″	3-1/4″	49″	1″	2″
20#	2-1/8″	3-1/4″	50″	1″	2″
21#	2-1/8″	3-1/4″	51″	1″	2″
22#	2″	3-1/8″	52″	7/8″	1-7/8″
23#	2″	3-1/8″	53″	7/8″	1-7/8″
24#	2″	3-1/8″	54″	7/8″	1-7/8″
25#	1-7/8″	3″	55″	7/8″	1-7/8″
26#	1-7/8″	3″	56″	3/4″	1-3/4″
27#	1-7/8″	3″	57″	3/4″	1-3/4″
28#	1-3/4″	2-7/8″	58″	11/16″	1-5/8″
29#	1-3/4″	2-7/8″	59″	11/16″	1-5/8″
30#	1-5/8″	2-3/4″	60″	11/16″	1-5/8″
Jobber Length Letter
Diameter	Flute Length(Inch)	Overall Length(mm)	Diameter (Inch)	Flute Length(Inch)	Overall Length(mm)
A	2-5/8″	3-7/8″	N	3-1/16″	4-3/8″
B	2-3/4″	4″	O	4-1/2″	4-1/2″
C	2-3/4″	4″	P	4-5/8″	4-5/8″
D	2-3/4″	4″	Q	4-3/4″	4-3/4″
E	2-3/4″	4″	R	4-3/4″	4-3/4″
F	2-7/8″	4-1/8″	S	4-7/8″	4-7/8″
G	2-7/8″	4-1/8″	T	4-7/8″	4-7/8″
H	2-7/8″	4-1/8″	U	5″	5″
I	2-7/8″	4-1/8″	V	3-5/8″	5″
J	2-7/8″	4-1/8″	W	3-3/4″	5-1/8″
K	2-15/16″	4-1/4″	X	3-3/4″	5-1/8″
L	2-15/16″	4-1/4″	Y	3-7/8″	5-1/4″
M	3-1/16″	4-3/8″	Z	3-7/8″	5-1/4″
* Custom-tailor would be available against customers’ requirements

Hss twist drill bits, black and gold surface provide a protection to prevent rusty. Drilling accurate without a center punch tool, it can drill in general metal drilling. 135 degree split point eliminate drill walking on work-pieces. High quality guarantee hss twist drill bits!

Material: M2 HSS 6542
Surface: Black & Gold
Use: Metal Drilling

Hss twist drill bits for drilling on copper, stainless steel, iron and other materials.

Hss twist Drill Bits use long life, Factory price.