Turbo Point HSS Cobalt Drill Bit for Stainless Steel

SUBORUI Industrial M35 Cobalt HSS Turbo Point Drill Bit — Specialized for Stainless Steel & High-Tensile Alloy Drilling

Overview

Elevate your machining efficiency with the SUBORUI Turbo Point M35 Cobalt Drill Bit. Engineered for the most demanding industrial applications, these bits are forged from 5% Cobalt-enriched High-Speed Steel (HSS-Co 5%). The defining feature is our proprietary 135° Turbo Point geometry, which provides unrivaled precision, faster penetration, and superior heat management compared to standard split-point drills. It is the definitive choice for high-volume drilling in stainless steel, titanium, and hardened alloys.

Key Selling Points

Proprietary 135° Turbo Point: The advanced “Turbo” geometry significantly reduces the required thrust force and minimizes heat buildup at the tip. It ensures instant self-centering without “walking,” even on curved surfaces.
M35 High-Speed Steel (5% Cobalt): Specifically formulated for “red-hardness.” These bits maintain their cutting edge and structural integrity at temperatures that would cause standard HSS to fail.
Enhanced Type N Flute (30° Helix): Optimized 30-degree helix angle ensures rapid chip evacuation, preventing clogging and overheating during deep-hole drilling in gummy or tough materials.
Premium Amber Finish: The specialized amber treatment provides an additional layer of heat resistance and lubricity, reducing friction and extending the tool’s service life by up to 400%.
Industrial Versatility: Features a standard round shank compatible with all major CNC machines, drill presses, and high-performance handheld drills.

Target Applications & Materials

Stainless Steel: Series 200, 300 (SS304/SS316), and 400.
Aviation Alloys: Titanium, Inconel, and high-tensile nickel alloys.
Heavy Construction: Cast iron, spring steel, and tool steel.
Marine & Oil/Gas: High-corrosion-resistant metals.

B2B Service & Support

Wholesale & Bulk Supply: Competitive tiered pricing for high-volume distributors and industrial users.
OEM & Custom Branding: Private label laser-marking and custom packaging options available to match your brand identity.
Fast Lead Times: Optimized supply chain with significant stock levels to ensure your production lines never stop.
Global Shipping: DDP/FOB shipping terms supported for global delivery.

Application
HSS Grade	Iron	Aluminum	Carbon Steel	Tile	Plastic	Stainless Steel
4241	YES	YES	NO	NO	YES	NO
4341	YES	YES	YES	NO	YES	YES
6542(M2)	YES	YES	YES	NO	YES	GOOD
M35 (Co 5%)	YES	YES	YES	NO	YES	VERY GOOD

DESCRIPTION OF HSS	C	W	Mo	Cr	V	Co	Si	Mn	P	S
	%	%	%	%	%	%	%	%	%	%
W4Mo3Cr4V(4341)	0.88-0.98	3.5-4.5	2.5-3.5	3.8-4.4	1.2-1.8		0.5-1.2	0.2-0.4	<=0.03	<=0.03
W6Mo5Cr4V2(M2)	0.8-0.9	5.5-6.75	4.5-5.5	3.8-4.4	1.75-2.2	–	0.2-0.4	0.2-0.4	<=0.03	<=0.03
W6Mo5Cr4V2Co5(M35)	0.9-0.95	5.5-6.5	4.5-5.5	3.8-4.4	1.75-2.2	4.5-5.5	0.2-0.4	0.2-0.4	<=0.03	<=0.03
W2Mo9Cr4V2Co8(M42)	1.05-1.15	1.15-1.85	9.0-10.0	3.5-4.25	0.95-1.25	7.75-8.75	0.15-0.65	0.15-0.4	<=0.02	<=0.025

Metric size

DIA.(mm)	OVERALL LENGTH(mm)	WORKING LENGTH(mm)
1	34	12
1.5	43	20
2	49	24
2.5	57	30
3	61	33
3.5	70	39
4	75	43
4.5	80	47
5	86	52
5.5	93	57
6	93	57
6.5	101	63
7	109	69
7.5	109	69
8	117	75
8.5	117	75
9	125	81
9.5	125	81
10	133	87
10.5	133	87
11	142	94
11.5	142	94
12	151	101
12.5	151	101
13	151	101
13.5	160	108
14	160	108
14.5	169	114
15	169	114
15.5	178	120
16	178	120
16.5	184	125
17	184	125
17.5	191	130
18	191	130
18.5	198	135
19	198	135
19.5	205	140
20	205	140

Imperial size

DIA.	OVERALL LENGTH (INCH)	WORKING LENGTH (INCH)	DIA.	OVERALL	WORKING LENGTH (INCH)	DIA.	OVERALL	WORKING LENGTH (INCH)
1/64″	3/4″	3/16″	15#	3-3/8″	2-3/16″	61#	1-/5/8″	11/16″
1/32″	1-3/8″	1/2″	16#	3-3/8″	2-3/16″	62#	1-1/2″	5/8″
3/64″	1-3/4″	3/4″	17#	3-3/8″	2-3/16″	63#	1-1/2″	5/8″
1/16″	1-7/8″	7/8″	18#	3-1/4″	2-1/8″	64#	1-1/2″	5/8″
5/64″	2″	1″	19#	3-1/4″	2-1/8″	65#	1-1/2″	5/8″
3/32″	2-1/4″	1-1/4″	20#	3-1/4″	2-1/8″	66#	1-3/8″	1/2″
7/64″	2-5/8″	1-1/2″	21#	3-1/4″	2-1/8″	67#	1-3/8″	1/2″
1/8″	2-3/4″	1-5/8″	22#	3-1/8″	2″	68#	1-3/8″	1/2″
9/64″	2-7/8″	1-3/4″	23#	3-1/8″	2”	69#	1-3/8″	1/2″
5/32″	3-1/8″	2″	24#	3-1/8″	2″	70#	1-1/4″	3/8″
11/64″	3-1/4″	2-1/8″	25#	3″	1-7/8”	71#	1-1/4″	3/8″
3/16″	3-1/2″	2-5/16″	26#	3″	1-7/8″	72#	1-1/8″	5/16″
13/64″	3-5/8″	2-7/16″	27#	3”	1-7/8″	73#	1-1/8″	5/16″
7/32″	3-3/4″	2-1/2″	28#	2-7/8″	1-3/4″	74#	1″	1/4″
15/64″	3-7/8″	2-5/8″	29#	2-7/8″	1-3/4″	75#	1″	1/4″
1/4″	4″	2-3/4″	30#	2-3/4″	1-5/8″	76#	7/8″	3/16″
17/64″	4-1/8″	2-7/8″	31#	2-3/4″	1-5/8″	77#	7/8″	3/16″
9/32″	4-1/4″	2-15/16″	32#	2-3/4″	1-5/8″	78#	7/8″	3/16″
19/64″	4-3/8″	3-1/16″	33#	2-5/8″	1-1/2″	79#	3/4″	1/8″
5/16″	4-1/2″	3-3/16″	34#	2-5/8″	1-1/2″	80#	3/4″	1/8″
21/64″	4-5/8″	3-5/16″	35#	2-5/8″	1-1/2″	A	3-/7/8″	2-5/8″
11/32″	4-3/4″	3-7/16″	36#	2-1/2″	1-7/16″	B	4″	2-3/4″
23/64″	4-7/8″	3-1/2″	37#	2-1/2″	1-7/16″	C	4″	2-3/4″
3/8″	5″	3-5/8″	38#	2-1/2″	1-7/16″	D	4″	2-3/4″
25/64″	5-1/8″	3-3/4″	39#	2-3/8″	1-3/8”	E	4″	2-3/4″
13/32″	5-1/4″	3-7/8″	40#	2-3/8″	1-3/8″	F	4-/1/8″	2-7/8″
27/64″	5-3/8″	3-15/16″	41#	2-3/8″	1-3/8″	G	4-/1/8″	2-7/8″
7/16″	5-1/2″	4-1/16″	42#	2-1/4″	1-1/4″	H	4-/1/8″	2-7/8″
29/64″	5-5/8″	4-3/16″	43#	2-1/4″	1-1/4″	I	4-1/8”	2-7/8″
15/32″	5-3/4″	4-5/16″	44#	2-1/8″	1-1/8″	J	4-/1/8″	2-7/8″
31/64″	5-7/8″	4-3/8″	45#	2-1/8″	1-1/8″	K	4-/1/4″	2-15/16″
1/2″	6″	4-1/2″	46#	2-1/8″	1-1/8″	L	4-/1/4″	2-15/16″
1#	3-7/8″	2-5/8″	47#	2″	1″	M	4-3/8″	3-1/16″
2#	3-7/8″	2-5/8″	48#	2″	1″	N	4-3/8″	3-1/16″
3#	3-3/4″	2-1/2″	49#	2″	1″	O	4-1/2″	3-3/16″
4#	3-3/4″	2-1/2″	50#	2″	1″	P	4-5/8″	3-5/16″
5#	3-3/4″	2-1/2″	51#	2″	1″	Q	4-3/4″	3-7/16″
6#	3-3/4″	2-1/2″	52#	1-7/8″	7/8″	R	4-3/4″	3-7/16″
7#	3-5/8″	2-7/16″	53#	1-7/8″	7/8″	S	4-7/8″	3-1/2″
8#	3-5/8″	2-7/16″	54#	1-7/8″	7/8″	T	4-7/8″	3-1/2″
9#	3-5/8″	2-7/16″	55#	1-7/8″	7/8″	U	5″	3-5/8″
10#	3-5/8″	2-7/16″	56#	1-3/4″	3/4″	V	5″	3-5/8″
11#	3-1/2″	2-5/16″	57#	1-3/4″	3/4″	W	5-1/8″	3-3/4″
12#	3-1/2″	2-5/16″	58#	1-5/8″	11/16″	X	5-1/8″	3-3/4″
13#	3-1/2″	2-5/16″	59#	1-5/8″	11/16″	Y	5-1/4″	3-7/8″
14#	3-3/8″	2-3/16″	60#	1-5/8″	11/16″	Z	5-1/4″	3-7/8″