CARBIDE DRILL BITS FOR STEEL

Solid Carbide Drill Bits for Stable Drilling of Steel.

D2300-Series

Carbide Drill Bit for Steel Design Highlights

Solid Carbide Construction
Oerlikon AITiN Nano Coating
140° Point Angle Design
Cutting Edge Preparation
Optimized Flute Geometry
Reinforced Web Core

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Carbide Drill Bit for Steel Types

3D-D2300-Series-Carbide-Drill-Bits-for-Steel

3×D Straight Shank Twist Drill

Suitable for general drilling with unmatched tool rigidity and chip evacuation.

P: Steel
K: Cast Iron
H: Hardened Steel
2 Flutes
3×D
Internal coolant design
External coolant design
Oerlikon AITiN nano Coating
DIN 6535-HA
Straight Shank
Drilling
Right-Hand Cutting
140° Point Angle
Solid Carbide Construction
M7

5D-D2300-Series-Carbide-Drill-Bits-for-Steel

5×D Straight Shank Twist Drill

Ideal for drilling deeper holes with balanced tool rigidity and stability.

P: Steel
K: Cast Iron
H: Hardened Steel
2 Flutes
5×D
Internal Coolant Design
External Coolant Design
Oerlikon AITiN nano Coating
DIN 6535-HA
Straight Shank
Drilling
Right-Hand Cutting
140° Point Angle
Solid Carbide Construction
M7

8D-D2300-Series-Carbide-Drill-Bits-for-Steel

8×D Internal Coolant Drill

Suitable for deep-hole drilling with superior tool stability and internal coolant channels.

P: Steel
K: Cast Iron
H: Hardened Steel
2 Flutes
8×D
Internal Coolant Design
Oerlikon AITiN nano coating
DIN 6535-HA
Straight Shank
Drilling
Right-Hand Cutting
140° Point Angle
Solid Carbide Construction
M7

D2300-Series

Why Choose Our Carbide Drill Bits for Steel?

JINOO’s D2300-Series Carbide Drill Bits for Steel have excellent features to demonstrate their outstanding cutting performance.

Fine-Grain Carbide Substrate

Our drill bits for steel are manufactured from high-purity tungsten carbide with 0.4 μm grain structures.

Oerlikon AITiN Nano Coating

JINOO’s carbide drill bits for steel feature AITiN nano coatings with even thickness and heat resistance.

140° Point Angle Design

Our drill bits for steel are designed with a 140° point angle, which features a precisely ground point design.

Cutting Edge Preparation

Micro-honed cutting edges of drill bits for steel are achieved with controlled edge preparation.

Optimized Flute Geometry

Our carbide drill bits for steel feature polished flutes with precision-ground profiles and internal surface finishes.

Reinforced Web Core

Carbide drill bits for steel are engineered with a reinforced core that features higher thickness and a cross-sectional geometry with high stability.

Drill Bits for Steel Geometry Breakdown

1.Fine-Grain Carbide Substrate for Longer Tool Life

Our Carbide Drill Bits for Steel can last longer with the use of 0.4 μm fine-grain carbide substrates, which balance the hardness and fracture toughness.

2.AITiN Nano Coating for Higher Heat Resistance

Combined with durable coatings, carbide drill bits for steel can maintain high stability under extremely high temperatures of nearly 1000°C.

3.140° Split Point Design for Stable Positioning

The 140° split point design evenly distributes cutting forces with minimal drill walking and improved positioning stability.

4.Cutting Edge Preparation for Minimal Micro-Chipping

Honed cutting edges with a uniform edge radius can balance strength and sharpness of the cutting lip, decreasing stress concentration with less edge chipping.

5.Polished Flutes for Efficient Chip Flow

Mirror-polished flutes can deliver less tool friction with 60% increased machining efficiency.

6.Reinforced Web Core for Higher Rigidity

The reinforced core with higher core thickness can improve torsional stiffness and bending resistance, minimizing the tool deflection.

7.30° Helix Angle for Superior Chip Control

The 30° helix angle promotes the chip evacuation and delivers higher tool rigidity.

8.Optimized Chisel Edge for Less Thrust Force

The shortened chisel edge reduces the center area to improve centering accuracy and decrease thrust forces.

9.Balanced Relief Angle for Less Friction

The balanced relief angle can greatly reduce the tool friction while maintaining edge strength and heat generation to maintain the hole consistency.

Geometry Breakdown of D2300-Series Carbide Drill Bits for Steel

Technical Data

Ultra-fine Grain Substrate	0.4μm
Tolerance	M7
Coating	AlTiN + TiSiN / TiAlSiN-X / AlTiN / TiAlN / TiAlSiN / DLC / AlCrN / AlCrSiN / AlTiSiN / TiSiXN / Customized Available
Flute Number	2
Overall Length	50 / 60 / 75 / 100 / 150 / 200mm / Customized Length
Shank Diameter	4 / 6 / 8 / 10 / 12 / 14 / 16/ 18 / 20mm / Customized Diameter

D2300-Series

Carbide Drill Bits for Steel Specifications

Metric carbide drill sizes between 3 mm and 20 mm with 3xD, 5xD, 8xD and 12xD drilling depths are available.

Standard Drill Bits for Steel Size Range
Carbide Substrate
Quick Selection Guide
Recommended Cutting Parameters

Code		Diameter (mm)	Diameter (in)	Shank Diameter (in)	Overal Length OAL(in)	Flute Length (in)
External Coolant	Internal Coolant	Diameter (mm)	Diameter (in)	Shank Diameter (in)	Overal Length OAL(in)	Flute Length (in)
D2303-NHA-D03175	D2303-CHA-D03175	3.175	0.125	6	62	20
D2303-NHA-D03571	D2303-CHA-D03571	3.571	0.1406	6	62	20
D2303-NHA-D03970	D2303-CHA-D03970	3.97	0.1563	6	66	24
D2303-NHA-D04366	D2303-CHA-D04366	4.366	0.1719	6	66	24
D2303-NHA-D04763	D2303-CHA-D04763	4.763	0.1875	6	66	28
D2303-NHA-D05159	D2303-CHA-D05159	5.159	0.2031	6	66	28
D2303-NHA-D05558	D2303-CHA-D05558	5.558	0.2188	6	66	28
D2303-NHA-D05949	D2303-CHA-D05949	5.949	0.2344	6	66	28
D2303-NHA-D06350	D2303-CHA-D06350	6.35	0.25	8	79	34
D2303-NHA-D06746	D2303-CHA-D06746	6.746	0.2656	8	79	34
D2303-NHA-D07145	D2303-CHA-D07145	7.145	0.2813	8	79	41
D2303-NHA-D07541	D2303-CHA-D07541	7.541	0.2969	8	79	41
D2303-NHA-D07938	D2303-CHA-D07938	7.938	0.3125	8	79	41
D2303-NHA-D08344	D2303-CHA-D08344	8.334	0.3281	10	89	47
D2303-NHA-D08733	D2303-CHA-D08733	8.733	0.3438	10	89	47
D2303-NHA-D09129	D2303-CHA-D09129	9.129	0.3594	10	89	47
D2303-NHA-D09525	D2303-CHA-D09525	9.525	0.375	10	89	47
D2303-NHA-D09921	D2303-CHA-D09921	9.921	0.3906	10	89	47
D2303-NHA-D10320	D2303-CHA-D10320	10.32	0.4063	12	102	55
D2303-NHA-D10716	D2303-CHA-D10716	10.716	0.4219	12	102	55
D2303-NHA-D11111	D2303-CHA-D11111	11.111	0.4375	12	102	55
D2303-NHA-D11509	D2303-CHA-D11509	11.509	0.4531	12	102	55
D2303-NHA-D11908	D2303-CHA-D11908	11.908	0.4688	12	102	55
D2303-NHA-D12300	D2303-CHA-D12300	12.3	0.4843	14	107	60
D2303-NHA-D12700	D2303-CHA-D12700	12.7	0.5	14	107	60
D2303-NHA-D13100	D2303-CHA-D13100	13.1	0.5157	14	107	60
D2303-NHA-D13891	D2303-CHA-D13891	13.891	0.5469	14	107	60
D2303-NHA-D14288	D2303-CHA-D14288	14.288	0.5625	16	115	65
D2303-NHA-D14684	D2303-CHA-D14684	14.684	0.5781	16	115	65
D2303-NHA-D15083	D2303-CHA-D15083	15.083	0.5938	16	115	65
D2303-NHA-D15479	D2303-CHA-D15479	15.479	0.6094	16	115	65
D2303-NHA-D15875	D2303-CHA-D15875	15.875	0.625	16	115	65
D2303-NHA-D17463	D2303-CHA-D17463	17.463	0.6875	18	123	73
D2303-NHA-D19050	D2303-CHA-D19050	19.05	0.75	20	131	79


Code		Diameter (mm)	Diameter (in)	Shank Diameter (in)	Overal Length OAL(in)	Flute Length (in)
External Coolant	Internal Coolant	Diameter (mm)	Diameter (in)	Shank Diameter (in)	Overal Length OAL(in)	Flute Length (in)
D2305-NHA-D03175	D2305-CHA-D03175	3.175	0.125	6	62	28
D2305-NHA-D03571	D2305-CHA-D03571	3.571	0.1406	6	66	28
D2305-NHA-D03970	D2305-CHA-D03970	3.97	0.1563	6	74	36
D2305-NHA-D04366	D2305-CHA-D04366	4.366	0.1719	6	74	36
D2305-NHA-D04763	D2305-CHA-D04763	4.763	0.1875	6	82	44
D2305-NHA-D05159	D2305-CHA-D05159	5.159	0.2031	6	82	44
D2305-NHA-D05558	D2305-CHA-D05558	5.558	0.2188	6	82	44
D2305-NHA-D05949	D2305-CHA-D05949	5.949	0.2342	6	82	44
D2305-NHA-D06350	D2305-CHA-D06350	6.35	0.25	8	91	53
D2305-NHA-D06746	D2305-CHA-D06746	6.746	0.2656	8	91	53
D2305-NHA-D07145	D2305-CHA-D07145	7.145	0.2813	8	91	53
D2305-NHA-D07541	D2305-CHA-D07541	7.541	0.2969	8	91	53
D2305-NHA-D07938	D2305-CHA-D07938	7.938	0.3125	8	91	53
D2305-NHA-D08344	D2305-CHA-D08344	8.344	0.3281	10	103	61
D2305-NHA-D08733	D2305-CHA-D08733	8.733	0.3438	10	103	61
D2305-NHA-D09129	D2305-CHA-D09129	9.129	0.3594	10	103	61
D2305-NHA-D09525	D2305-CHA-D09525	9.525	0.375	10	103	61
D2305-NHA-D09921	D2305-CHA-D09921	9.921	0.3906	10	103	61
D2305-NHA-D10320	D2305-CHA-D10320	10.32	0.4063	12	118	71
D2305-NHA-D10716	D2305-CHA-D10716	10.716	0.4219	12	118	71
D2305-NHA-D11111	D2305-CHA-D11111	11.111	0.4374	12	118	71
D2305-NHA-D11509	D2305-CHA-D11509	11.509	0.4531	12	118	71
D2305-NHA-D11908	D2305-CHA-D11908	11.908	0.4688	12	118	71
D2305-NHA-D12300	D2305-CHA-D12300	12.3	0.4843	14	124	77
D2305-NHA-D12700	D2305-CHA-D12700	12.7	0.5	14	124	77
D2305-NHA-D13100	D2305-CHA-D13100	13.1	0.5157	14	124	77
D2305-NHA-D13891	D2305-CHA-D13891	13.891	0.5469	14	124	77
D2305-NHA-D14288	D2305-CHA-D14288	14.288	0.5625	16	133	83
D2305-NHA-D14684	D2305-CHA-D14684	14.684	0.5781	16	133	83
D2305-NHA-D15083	D2305-CHA-D15083	15.083	0.5938	16	133	83
D2305-NHA-D15479	D2305-CHA-D15479	15.479	0.6094	16	133	83
D2305-NHA-D15875	D2305-CHA-D15875	15.875	0.625	16	133	83
D2305-NHA-D17463	D2305-CHA-D17463	17.463	0.6875	18	143	93
D2305-NHA-D19050	D2305-CHA-D19050	19.05	0.75	20	153	101

Code		Diameter (mm)	Diameter (in)	Shank Diameter (in)	Overal Length OAL(in)	Flute Length (in)
Internal Coolant		Diameter (mm)	Diameter (in)	Shank Diameter (in)	Overal Length OAL(in)	Flute Length (in)
D2308-CHA-D03175		3.175	0.125	6	90	50
D2308-CHA-D03571		3.571	0.1406	6	90	50
D2308-CHA-D03970		3.97	0.1563	6	102	64
D2308-CHA-D04366		4.366	0.1719	6	102	64
D2308-CHA-D04763		4.763	0.1875	6	102	64
D2308-CHA-D05159		5.159	0.2031	6	116	78
D2308-CHA-D05558		5.558	0.2188	6	116	78
D2308-CHA-D05949		5.949	0.2344	6	116	78
D2308-CHA-D06350		6.35	0.25	8	146	108
D2308-CHA-D06746		6.746	0.2656	8	146	108
D2308-CHA-D07145		7.145	0.2813	8	146	108
D2308-CHA-D07541		7.541	0.2969	8	146	108
D2308-CHA-D07938		7.938	0.3125	8	146	108
D2308-CHA-D08344		8.334	0.3281	10	162	120
D2308-CHA-D08733		8.733	0.3438	10	162	120
D2308-CHA-D09129		9.129	0.3594	10	162	120
D2308-CHA-D09525		9.525	0.375	10	162	120
D2308-CHA-D09921		9.921	0.3906	10	162	120
D2308-CHA-D10320		10.32	0.4063	12	204	156
D2308-CHA-D10716		10.716	0.4219	12	204	156
D2308-CHA-D11111		11.111	0.4375	12	204	156
D2308-CHA-D11509		11.509	0.4531	12	204	156
D2308-CHA-D11908		11.908	0.4688	12	204	156
D2308-CHA-D12300		12.3	0.4843	14	230	182
D2308-CHA-D12700		12.7	0.5	14	230	182
D2308-CHA-D13100		13.1	0.5157	14	230	182
D2308-CHA-D13891		13.891	0.5469	14	230	182
D2308-CHA-D14288		14.288	0.5625	16	260	208
D2308-CHA-D14684		14.684	0.5781	16	260	208
D2308-CHA-D15083		15.083	0.5938	16	260	208
D2308-CHA-D15479		15.479	0.6094	16	260	208
D2308-CHA-D15875		15.875	0.625	16	260	208
D2312-CHA-D17463		17.463	0.6875	18	285	234
D2312-CHA-D19050		19.05	0.75	20	310	258

Grain size	Feature	Suitable materials	Advantage
0.2μ	Ultra-fine grain, extremely high hardness, very sharp cutting edge	Hardened steel (HRC60+), stainless steel, titanium alloys, micro-diameter tools	Excellent wear resistance & edge sharpness, ideal for high-precision finishing, but lower toughness
0.4μ	Ultrafine grain, excellent hardness-toughness balance	hardness-toughness balance Hardened steel, stainless steel, alloy steel, precision mold steel	High wear resistance with good edge stability, suitable for finishing & semi-finishing
0.6μ	Fine grain, balanced performance	Carbon steel, alloy steel, stainless steel, cast iron (general conditions)	Good balance of wear resistance and toughness, versatile general-purpose grade
0.7μ	Medium-fine grain, improved toughness	General steel, low-alloy steel, interrupted cutting conditions	Better resistance to chipping, suitable for semi-roughing and unstable cutting
0.8μ	Medium grain, high toughness	Low carbon steel, rough machining, heavy interrupted cutting	Strong impact resistance, suitable for roughing and demanding cutting stability

Materials		Workpiece Materials	Type
ISO		Workpiece Materials	Type
P	P1	Free-Cutting Steel	D2100 / D2200 / D2300 / D2400 / D2600 / D3000 / D5200 / D9100
	P2	Low Carbon Steel（C<0.25%）
	P4	Medium Carbon Steel(0.25%<C<0.60%), Low Alloy Steel
	P5	Alloy Steel, Quenched and Tempered Steel
	P6	High Carbon Steel（C>0.6%）
	P11	Ferritic Stainless Steel, Martensitic Stainless Steel
H	H5	Quenched and Tempered Steel	D2100 / D2200 / D2300 / D2400 / D2600 / D3000
	H7	Bearing Steel
	H8	Tool Steel, High Speed Steel
	H12	Hardened Stainless Steel
	H21	Zinc-Plated Steel
M	M1	Austenitic Stainless Steel	D2100 / D2200 / D2400 / D2600 / D3000 / D5200 / D9100
	M2	High-Strength Austenitic Stainless Steel
	M4	Duplex Stainless Steel
S	S1	Iron-Based Superalloy	D2600 / D9100
	S2	Cobalt-Based Superalloy
	S3	Nickel-Based Superalloy
	S11	Titanium Alloy (Low Alloy)
	S13	Titanium Alloy (High Alloy)
K	K1	Gray Cast Iron	D2100 / D2200 / D2300 / D2400 / D3000 / D5200 / D7200 / D9100
	K2	Compacted Graphite Iron（CGI）
	K3	Malleable Cast Iron
	K4	Ductile Cast Iron
N	N1	Aluminum-Silicon Alloy,Silicon content<9%	D2500 / D2600 / D5200 / D7200 / D9100
	N2	Silicon-Aluminum Alloy,9%<Silicon content<16%
	N3	Silicon-Aluminum Alloy,Silicon content>16%
	N4	Cast Aluminum Alloy
	N5	Wrought Aluminum Alloy
	N10	Copper
	N11	Copper Alloy

Materials		Workpiece Materials	Brinell Hardness	Rockwell Hardness	Cutting Speed Vc (m/min)	Feed Per Revolution fn (mm/rev)
ISO		Workpiece Materials	HB	HRC	External Coolant	3	4	6	8	10	12	14	16	18	20
P	P1	Free-Cutting Steel	<125		80	0.07	0.1	0.13	0.16	0.18	0.2	0.22	0.25	0.28	0.3
	P2	Low Carbon Steel（C<0.25%）	<125		80	0.07	0.1	0.13	0.16	0.18	0.2	0.22	0.25	0.28	0.3
	P4	Medium Carbon Steel(0.25%<C<0.60%), Low Alloy Steel	<220	<25	80	0.07	0.1	0.13	0.16	0.18	0.2	0.22	0.25	0.28	0.3
	P5	Alloy Steel, Quenched and Tempered Steel	330	28-35	70	0.07	0.1	0.13	0.16	0.18	0.2	0.22	0.25	0.28	0.3
	P6	High Carbon Steel（C>0.6%）	370-750	45-65
	P11	Ferritic Stainless Steel, Martensitic Stainless Steel	250-450	38-50	45	0.07	0.1	0.12	0.14	0.16	0.18	0.2	0.22	0.24	0.26
H	H5	Quenched and Tempered Steel		35-40	45	0.07	0.1	0.12	0.14	0.16	0.18	0.2	0.22	0.24	0.26
	H7	Bearing Steel		66-64	45	0.05	0.06	0.08	0.11	0.13	0.15	0.17	0.18	0.19	0.2
	H8	Tool Steel, High Speed Steel		38-84	45	0.05	0.06	0.08	0.11	0.13	0.15	0.17	0.18	0.19	0.2
	H12	Hardened Stainless Steel		33-50	35	0.05	0.06	0.08	0.11	0.13	0.15	0.17	0.18	0.19	0.2
	H21	Zinc-Plated Steel		35-64	45	0.05	0.06	0.08	0.11	0.13	0.15	0.17	0.18	0.19	0.2
K	K1	Compacted Graphite Iron（CGI）	120-290	<32	90	0.13	0.15	0.18	0.2	0.22	0.25	0.28	0.3	0.32	0.35
	K2	Malleable Cast Iron	120-290	<32	80	0.11	0.11	0.15	0.18	0.2	0.22	0.25	0.28	0.3	0.32
	K3	Ductile Cast Iron	130-260	<28	80	0.11	0.11	0.15	0.18	0.2	0.22	0.25	0.28	0.3	0.32
	K⁴	Aluminum-Silicon Alloy,Silicon content<9%	180-350	<43	70	0.11	0.09	0.13	0.16	0.18	0.2	0.22	0.25	0.28	0.3

Drill Bit for Steel Application Cases

26% Longer Tool Life in 40Cr Steel Machining

Background

The automotive differential housing is used to achieve different speeds of the left and right drive wheels. It is made of 40Cr alloy steel with hardness from HB220 to 300, which determines its high wear resistance.

Challenge

Workpiece: 40Cr steel differential housings
Hardness: HB220–300
Hole Type: Through hole of Ø16.5 mm
Hole Depth: 55 mm
Requirement: Longer drill bit lifespan with higher hole consistency

Solution

Tool Used: D2300 5×D external coolant carbide drill bits for steel
Spindle Speed: 1,600 rpm
Feed Rate: 400 mm/min
Cooling: External coolant

Results

Each carbide drill bit for steel can machine 126 components with stable hole quality and less tool replacement, which delivers higher machining efficiency with 26% longer tool lifespan.

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Real Case of D2300-Series Carbide Drill Bits for Steel

Reliable Blind-Hole Drilling for C70 Connecting Rod Machining

Background

The CAM50 automotive engine connecting rods are used to link the piston and the crankshaft. They are manufactured from C70 medium-carbon steel with a hardness of HB240–280, which means they feature high hardness and toughness.

Challenge

Workpiece: C70 connecting rod
Hardness: HB240–280
Hole Type: Blind hole
Hole Depth: 50.2 mm
Requirement: Higher hole accuracy and extended tool life in heavy-duty machining

Solution

Tool Used: D2300 carbide drill with Super S coating
Diameter: Ø14.6 mm
Point Angle: 140°
Coolant: Internal coolant
Machine: ALFING Connecting Rod Machining Center
Spindle Speed: 1,750 rpm
Feed Rate: 350-600 mm/min

Results

Our drill bits for steel can drill 550 blind holes in connecting rods with 55 m drilling lengths, while drilling 850 connecting rods in Ø13.35 mm bottom-hole machining. They can last longer than Kennametal’s drill by over 50 components.

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How JINOO Manufactures Drill Bits for Steel?

Precision CNC Grinding Machines

- WALTER Helitronic Power 400L
- WALTER Helitronic Vision 400L
- WALTER Helitronic Micro 400L
- Rollomatic NP5
- ANCA MX5
- ANCA MX7
These advanced devices are engineered for machining and refining precision tools with tight concentricity and tolerances, ensuring their profile accuracy and superior geometry consistency.
Get instant Quote
- WALTER Helitronic Power 400L
- WALTER Helitronic Vision 400L
- WALTER Helitronic Micro 400L
- Rollomatic NP5
- ANCA MX5
- ANCA MX7
These advanced devices are engineered for machining and refining precision tools with tight concentricity and tolerances, ensuring their profile accuracy and superior geometry consistency.
Get instant Quote
- WALTER Helitronic Power 400L
- WALTER Helitronic Vision 400L
- WALTER Helitronic Micro 400L
- Rollomatic NP5
- ANCA MX5
- ANCA MX7
These advanced devices are engineered for machining and refining precision tools with tight concentricity and tolerances, ensuring their profile accuracy and superior geometry consistency.
Get instant Quote
- WALTER Helitronic Power 400L
- WALTER Helitronic Vision 400L
- WALTER Helitronic Micro 400L
- Rollomatic NP5
- ANCA MX5
- ANCA MX7
These advanced devices are engineered for machining and refining precision tools with tight concentricity and tolerances, ensuring their profile accuracy and superior geometry consistency.
Get instant Quote
- WALTER Helitronic Power 400L
- WALTER Helitronic Vision 400L
- WALTER Helitronic Micro 400L
- Rollomatic NP5
- ANCA MX5
- ANCA MX7
These advanced devices are engineered for machining and refining precision tools with tight concentricity and tolerances, ensuring their profile accuracy and superior geometry consistency.
Get instant Quote
- WALTER Helitronic Power 400L
- WALTER Helitronic Vision 400L
- WALTER Helitronic Micro 400L
- Rollomatic NP5
- ANCA MX5
- ANCA MX7
These advanced devices are engineered for machining and refining precision tools with tight concentricity and tolerances, ensuring their profile accuracy and superior geometry consistency.
Get instant Quote

Advanced Quality Inspection System

1.ZOLLER G3 Tool Measurement: Applied to verify the geometry and dimensions of carbide drill bits for steel with measurement accuracy controlled within ±2 μm.

2.PG1000 Optical Inspection: Used after dimensional verification to analyze edge preparation and surface integrity to avoid edge defects.

3.Parlec Tool Presetting: Utilized to inspect the tool length and control the runout within 3 μm.

Precision tool positioning can also be ensured with outstanding clamping positioning accuracy. JINOO insists on a comprehensive tool inspection to ensure the tool consistency and high-dimensional accuracy.
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1.ZOLLER G3 Tool Measurement: Applied to verify the geometry and dimensions of carbide drill bits for steel with measurement accuracy controlled within ±2 μm.

2.PG1000 Optical Inspection: Used after dimensional verification to analyze edge preparation and surface integrity to avoid edge defects.

3.Parlec Tool Presetting: Utilized to inspect the tool length and control the runout within 3 μm.

Precision tool positioning can also be ensured with outstanding clamping positioning accuracy. JINOO insists on a comprehensive tool inspection to ensure the tool consistency and high-dimensional accuracy.
Get instant Quote
1.ZOLLER G3 Tool Measurement: Applied to verify the geometry and dimensions of carbide drill bits for steel with measurement accuracy controlled within ±2 μm.

2.PG1000 Optical Inspection: Used after dimensional verification to analyze edge preparation and surface integrity to avoid edge defects.

3.Parlec Tool Presetting: Utilized to inspect the tool length and control the runout within 3 μm.

Precision tool positioning can also be ensured with outstanding clamping positioning accuracy. JINOO insists on a comprehensive tool inspection to ensure the tool consistency and high-dimensional accuracy.
Get instant Quote

Fine-grain Carbide Tool Material

1.Our carbide drill bits for steel are manufactured from fine-grain tool carbide, which is sourced from GESAC, Kennametal, Sandvik, Gühring, and CB Ceratizit.

2.These durable carbide substrates feature high hardness and wear resistance without impurities.

3.They can last longer to decrease the tool change frequency.

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Virgin Carbide Instead of Recycled Carbide

JINOO’s virgin tungsten carbide used in our carbide drill bits for steel:
- Fine-grain size
- High density
- Longer tool lifespan
- Superior stability
- Pure structure
Competitor’s inferior recycled carbide used in poor-quality drill bits:
- Uneven grain size
- Many impurities
- Loose structure
- Prone to edge chipping
- Limited tool life
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Reliable Coating Partners

1.JINOO applies advanced coating technology from Oerlikon Balzers.

2.A wide range of coating selections is provided to improve the cutting performance of carbide drill bits for steel.

3.All the durable coatings feature excellent heat and wear resistance.

4.They can minimize cutting friction to maintain stable machining even under higher cutting speeds.
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High-performance Coating vs. Poor-quality Coating

High-quality coatings used in our carbide drill bits for steel:
- Strong adhesion
- Even thickness
- Uniform interlayer transition
- Stable wear-resistance
- Smooth chip removal
Competitor’s poor-quality coatings used in low-grade drill bits:
- Weak adhesion
- Uneven thickness
- Loose structure with pores
- Poor density
- Prone to tool failure
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ISO 9001 Quality Management System

- ISO9001:2008 Certified
- ISO9001:2015 Certified
- SGS Qualified Manufacturer
- TÜV Rheinland Qualified Manufacturer
- Alibaba.com Verified Supplier
- Made-in-China Verified Supplier
- 1688 platforms Verified Supplier
- National High-tech Enterprise
- Changzhou High-Tech Product Certification
The production of carbide drill bits for steel has been verified with the quality management system, enabling stable tool optimization. JINOO also features reliable manufacturing capabilities and quality standards, providing reliable tooling solutions for worldwide customers.
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- ISO9001:2008 Certified
- ISO9001:2015 Certified
- SGS Qualified Manufacturer
- TÜV Rheinland Qualified Manufacturer
- Alibaba.com Verified Supplier
- Made-in-China Verified Supplier
- 1688 platforms Verified Supplier
- National High-tech Enterprise
- Changzhou High-Tech Product Certification
The production of carbide drill bits for steel has been verified with the quality management system, enabling stable tool optimization. JINOO also features reliable manufacturing capabilities and quality standards, providing reliable tooling solutions for worldwide customers.
Get instant Quote
- ISO9001:2008 Certified
- ISO9001:2015 Certified
- SGS Qualified Manufacturer
- TÜV Rheinland Qualified Manufacturer
- Alibaba.com Verified Supplier
- Made-in-China Verified Supplier
- 1688 platforms Verified Supplier
- National High-tech Enterprise
- Changzhou High-Tech Product Certification
The production of carbide drill bits for steel has been verified with the quality management system, enabling stable tool optimization. JINOO also features reliable manufacturing capabilities and quality standards, providing reliable tooling solutions for worldwide customers.
Get instant Quote
- ISO9001:2008 Certified
- ISO9001:2015 Certified
- SGS Qualified Manufacturer
- TÜV Rheinland Qualified Manufacturer
- Alibaba.com Verified Supplier
- Made-in-China Verified Supplier
- 1688 platforms Verified Supplier
- National High-tech Enterprise
- Changzhou High-Tech Product Certification
The production of carbide drill bits for steel has been verified with the quality management system, enabling stable tool optimization. JINOO also features reliable manufacturing capabilities and quality standards, providing reliable tooling solutions for worldwide customers.
Get instant Quote
- ISO9001:2008 Certified
- ISO9001:2015 Certified
- SGS Qualified Manufacturer
- TÜV Rheinland Qualified Manufacturer
- Alibaba.com Verified Supplier
- Made-in-China Verified Supplier
- 1688 platforms Verified Supplier
- National High-tech Enterprise
- Changzhou High-Tech Product Certification
The production of carbide drill bits for steel has been verified with the quality management system, enabling stable tool optimization. JINOO also features reliable manufacturing capabilities and quality standards, providing reliable tooling solutions for worldwide customers.
Get instant Quote
- ISO9001:2008 Certified
- ISO9001:2015 Certified
- SGS Qualified Manufacturer
- TÜV Rheinland Qualified Manufacturer
- Alibaba.com Verified Supplier
- Made-in-China Verified Supplier
- 1688 platforms Verified Supplier
- National High-tech Enterprise
- Changzhou High-Tech Product Certification
The production of carbide drill bits for steel has been verified with the quality management system, enabling stable tool optimization. JINOO also features reliable manufacturing capabilities and quality standards, providing reliable tooling solutions for worldwide customers.
Get instant Quote
- ISO9001:2008 Certified
- ISO9001:2015 Certified
- SGS Qualified Manufacturer
- TÜV Rheinland Qualified Manufacturer
- Alibaba.com Verified Supplier
- Made-in-China Verified Supplier
- 1688 platforms Verified Supplier
- National High-tech Enterprise
- Changzhou High-Tech Product Certification
The production of carbide drill bits for steel has been verified with the quality management system, enabling stable tool optimization. JINOO also features reliable manufacturing capabilities and quality standards, providing reliable tooling solutions for worldwide customers.
Get instant Quote
- ISO9001:2008 Certified
- ISO9001:2015 Certified
- SGS Qualified Manufacturer
- TÜV Rheinland Qualified Manufacturer
- Alibaba.com Verified Supplier
- Made-in-China Verified Supplier
- 1688 platforms Verified Supplier
- National High-tech Enterprise
- Changzhou High-Tech Product Certification
The production of carbide drill bits for steel has been verified with the quality management system, enabling stable tool optimization. JINOO also features reliable manufacturing capabilities and quality standards, providing reliable tooling solutions for worldwide customers.
Get instant Quote
- ISO9001:2008 Certified
- ISO9001:2015 Certified
- SGS Qualified Manufacturer
- TÜV Rheinland Qualified Manufacturer
- Alibaba.com Verified Supplier
- Made-in-China Verified Supplier
- 1688 platforms Verified Supplier
- National High-tech Enterprise
- Changzhou High-Tech Product Certification
The production of carbide drill bits for steel has been verified with the quality management system, enabling stable tool optimization. JINOO also features reliable manufacturing capabilities and quality standards, providing reliable tooling solutions for worldwide customers.
Get instant Quote

Technical Support & Tool Optimization

1.Professional regrinding services are also available, and over 38% tooling costs can be saved after 3 times regrinding.

2.We can ensure you dimensional accuracy and edge consistency of the sharpened tools.

3.JINOO’ s technical team can provide you with comprehensive technical support and reliable after-sales services for your carbide drill bits for steel.
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Testimonials

“JINOO’s D2300-series Carbide Drill Bits for Steel are so amazing. I have bought over 5000 pieces of these carbide straight shank drills to machine steel parts, carbon steel, and stainless steel. Their cutting efficiency was relatively high, helping me drill perfect holes with brilliant surface finishes without burr formation. Carbide Drill Bits for Steel feature the tool structure with high rigidity, so there’s no break even under high-intensity machining scenarios. I will continue to trust and choose JINOO, which is a reliable carbide drill bit manufacturer!”

Anderson James
Head of Production

FAQ about Carbide Drill Bits for Steel

Do you provide customised Carbide Drill Bit for Steel services?

Of course! JINOO is willing to provide you with versatile customized options depending on the parameters of the Carbide Drill Bit for Steel. Please contact our professional sales team for more details.

How long does delivery usually take for JINOO’s Carbide Drill Bit for Steel?

If you want to buy the standard ones in stock, the delivery time will typically be within 3-5 business days, while the delivery time of a customised Carbide Drill Bit for Steel should be finalised according to your tool parameters.

Which payment methods does JINOO accept?

There are various payment methods for you to choose from, including T/T, credit card payments and other payment methods. You can contact our sales team with your requirements.

What specifications are available for Carbide Drill Bits for Steel?

To meet the various demands of our clients, JINOO has offered you carbide drill bits for steel with a full range of parameters that you can choose from.

Our D2300-Series Carbide Drill Bits for Steel offer 3xD, 5xD, 8xD, and 12xD with cutting diameters ranging from 3mm to 20mm. 8xD and 12xD carbide drill bits for steel can be combined with internal coolant channels. Moreover, we have also set both internal coolant and external coolant channels available for 3xD and 5xD to ensure machining efficiency with significant heat dissipation capacity.

We have also applied the AITiN Nano-layer coating to increase wear resistance and extend the lifespan of these carbide drills.

When should we choose external or internal coolant drills?

When using D2300-series drill bits to machine deep holes, internal coolant drills can not only prevent them from entanglement and clogging, but also quickly reduce the tip temperature and thermal wear.

For shallow holes, when the machine tool is equipped with a high-pressure external coolant device, external coolant drills are easier to produce due to their simplified structure at a lower cost.

For short-hole machining with small batches and frequent tool changes, an external coolant tool can ensure sufficient chip removal and production flexibility.

What are common mistakes when drilling hardened steel?

Common mistakes in drilling hardened steel include using drill bits unsuitable for hardened steel, using excessive spindle speeds, and applying insufficient coolants. You should avoid applying excessive feed pressure and use solid carbide drill bits for drilling harder materials instead of high-speed steel drill bits. Otherwise, these common mistakes will result in overheating, premature tool wear, and tool breakage.

We recommend you use solid carbide drill bits for hardened steel to achieve optimal machining results. Combined with proper cutting speeds, stable feed rates, and cutting fluid, superior hole accuracy and extended tool life can be achieved as well.

Is HSS better than carbide for steel?

Although HSS drill bits are more affordable for drilling soft metals, solid carbide drill bits are superior for high-speed drilling for steel with higher hardness, improved heat resistance, and extended tool life.

Solid carbide cutting tools can achieve three to five times higher cutting speeds than HSS tools. Moreover, they can deliver high-precision hole drilling even under hardened steel machining. As a result, HSS drills are cheaper for light machining, while carbide twist drills are more suitable for machining steel parts with stable drilling performance and wear resistance.

Contact our sales team or sign in to find out about all your pricing options.

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ABOUT US

JINOO Tools Group is a “National High-Tech Enterprise”, which was founded in 2006 and specializes in manufacturing high-precision solid carbide cutting tools with over 25,000㎡ manufacturing bases. Our cutting tools are widely used in the automotive, aerospace, and equipment manufacturing industries. We have accumulated over 50 national patents and passed the ISO:9001 certification, devoted to creating high-quality carbide drill bits for steel for our customers.