FOUR-FLUTE DRILL BITS

High Feed Four-Flute Drills for CNC Machining.

video section cover of D3000 deep hole drills

D4000-Series

Four-Flute Drill Design Highlights

Solid Carbide Construction
Oerlikon AITiN nano Coating
130° Point Angle Design
Cutting Edge Preparation
Four-Flute Geometry
The Reinforced Core

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Four-Flute Drill Bit Types

3×D Four-Flute Drill Bits

Suitable for drilling shallow holes with superior tool rigidity and higher machining stability.

P: Steel
M: Stainless Steel
K: Cast Iron
N: Non-ferrous
S: Superalloy
4 Flutes
3×D
Oerlikon AITiN nano coating
External Coolant Design
Internal Coolant Design
DIN 6535-HA
Drilling
Straight Shank
Right-Hand Cutting
140° Point Angle
Solid Carbide Construction
M7

5×D Four-Flute Drill Bits

Suitable for drilling deep holes with improved compatibility.

P: Steel
M: Stainless Steel
K: Cast Iron
N: Non-ferrous
S: Superalloy
4 Flutes
5×D
Oerlikon AITiN nano coating
External coolant design
Internal Coolant Design
DIN 6535-HA
Drilling
Straight Shank
Right-Hand Cutting
140° Point Angle
Solid Carbide Construction
M7

8×D Four-Flute Drill Bits

Ideal for deep-hole drilling with high feed rates.

P: Steel
M: Stainless Steel
K: Cast Iron
N: Non-ferrous
S: Superalloy
4 Flutes
8×D
Oerlikon AITiN nano coating
External Coolant Design
Internal Coolant Design
DIN 6535-HA
Straight Shank
Right-Hand Cutting
140° Point Angle
Solid Carbide Construction
Drilling
M7

D4000-Series

Why Choose Our Four-Flute Drill Bits?

For our D4000 series four-flute solid carbide drill bits, JINOO has introduced advanced features for the latest geometry design to achieve high-efficiency drilling.

Solid Carbide Construction

Our 4-flute drill bits are all manufactured from 0.4 μm ultra-fine carbide substrates with uniform grain structures.

Oerlikon AITiN Nano Coating

Four-flute drill bits are designed with Oerlikon AITiN nano coatings with uniform thickness and surface adhesion.

130° Point Angle Design

Designed with a 130° drill point angle, the drill tip structure is optimized with higher accuracy.

Cutting Edge Preparation

Cutting edges of 4-flute drills are precisely honed to minimize microscopic ridges.

Four-Flute Geometry

Our four-flute drill bits are designed with four flutes, featuring a balanced structure.

The Reinforced Core

JINOO’s 4-flute drills are designed with a thicker core to maintain the stable tool structure.

Four-Flute Drill Geometry Breakdown

1.Solid Carbide Construction for Higher Wear Resistance

The 0.4 μm ultra-fine carbide substrates enable higher wear resistance and minimal edge deformation with a hardness of HV 1900-2000.

2.AITiN Nano Coating for Longer Tool Life

Oerlikon AITiN nano coatings enable drills to resist oxidation under 900°C with the aluminum oxide dense layer to decrease flank wear and extend drill bit life.

3.130° Point Angle for Accurate Positioning

Featuring the 130° point angle design, thrust forces can be decreased by 15% with minimal drill walking to enhance positioning accuracy.

4.Honed Cutting Edges for Minimal Edge Chipping

Controlled edge preparation enhances the cutting edge rigidity and promotes drilling performance up to 5×D with minimal edge chipping.

5.Optimized Flute Geometry for Smooth Chip Flow

Cross-sectional volume and optimized chip flow channels can decrease chip clogging and heat buildup.

6.Reinforced Core for Higher Rigidity

The reinforced core can enhance the torsional stiffness of the tool body and resist bending to decrease tool vibration.

7.30° Helix Angle for Less Cutting Forces

The 30° helix angle is optimized to balance sharpness and edge strength with less cutting force.

8.Short Chisel Edge for Less Hole Wandering

Short chisel edge minimizes the extrusion zone to decrease thrust force, increasing centering accuracy with less hole wandering.

9.Optimized Relief Angle for Less Friction

Precisely designed relief angle minimizes flank contact with the workpiece and delivers sedge support, decreasing cutting friction to improve hole quality.

Geometry Breakdown of D4000-Series 4-Flute Drill Bits

Technical Data

Ultra-fine Grain Substrate	0.4μm
Cutting Diameter Tolerance	M7
Coating	AITiN +TiISiN/TIAISIN-X/ATIN/TAIN/TIAISIiN/DLC/AICrN/AICrSIN/AITiSIN/TiSiXN /Customized Available
Flute Number	4
Overall Length	50 / 60 / 75 / 100 / 150 / 200mm / Customised Length
Shank Diameter	4 / 6 / 8 / 10 / 12 / 14 / 16/ 18 / 20mm / Customised Diameter

D4000-Series

Four-Flute Drill Bit Specifications

4 flute carbide drill sizes with 3xD and 5xD drilling depths are available.

Standard Four-Flute Drill 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)
D4003-NHA-D03175	D4003-CHA-D03175	3.175	0.125	6	62	20
D4003-NHA-D03571	D4003-CHA-D03571	3.571	0.1406	6	62	20
D4003-NHA-D03970	D4003-CHA-D03970	3.97	0.1563	6	66	24
D4003-NHA-D04366	D4003-CHA-D04366	4.366	0.1719	6	66	24
D4003-NHA-D04763	D4003-CHA-D04763	4.763	0.1875	6	66	28
D4003-NHA-D05159	D4003-CHA-D05159	5.159	0.2031	6	66	28
D4003-NHA-D05558	D4003-CHA-D05558	5.558	0.2188	6	66	28
D4003-NHA-D05949	D4003-CHA-D05949	5.949	0.2344	6	66	28
D4003-NHA-D06350	D4003-CHA-D06350	6.35	0.25	8	79	34
D4003-NHA-D06746	D4003-CHA-D06746	6.746	0.2656	8	79	34
D4003-NHA-D07145	D4003-CHA-D07145	7.145	0.2813	8	79	41
D4003-NHA-D07541	D4003-CHA-D07541	7.541	0.2969	8	79	41
D4003-NHA-D07938	D4003-CHA-D07938	7.938	0.3125	8	79	41
D4003-NHA-D08344	D4003-CHA-D08344	8.334	0.3281	10	89	47
D4003-NHA-D08733	D4003-CHA-D08733	8.733	0.3438	10	89	47
D4003-NHA-D09129	D4003-CHA-D09129	9.129	0.3594	10	89	47
D4003-NHA-D09525	D4003-CHA-D09525	9.525	0.375	10	89	47
D4003-NHA-D09921	D4003-CHA-D09921	9.921	0.3906	10	89	47
D4003-NHA-D10320	D4003-CHA-D10320	10.32	0.4063	12	102	55
D4003-NHA-D10716	D4003-CHA-D10716	10.716	0.4219	12	102	55
D4003-NHA-D11111	D4003-CHA-D11111	11.111	0.4375	12	102	55
D4003-NHA-D11509	D4003-CHA-D11509	11.509	0.4531	12	102	55
D4003-NHA-D11908	D4003-CHA-D11908	11.908	0.4688	12	102	55
D4003-NHA-D12300	D4003-CHA-D12300	12.3	0.4843	14	107	60
D4003-NHA-D12700	D4003-CHA-D12700	12.7	0.5	14	107	60
D4003-NHA-D13100	D4003-CHA-D13100	13.1	0.5157	14	107	60
D4003-NHA-D13891	D4003-CHA-D13891	13.891	0.5469	14	107	60
D4003-NHA-D14288	D4003-CHA-D14288	14.288	0.5625	16	115	65
D4003-NHA-D14684	D4003-CHA-D14684	14.684	0.5781	16	115	65
D4003-NHA-D15083	D4003-CHA-D15083	15.083	0.5938	16	115	65
D4003-NHA-D15479	D4003-CHA-D15479	15.479	0.6094	16	115	65
D4003-NHA-D15875	D4003-CHA-D15875	15.875	0.625	16	115	65
D4003-NHA-D17463	D4003-CHA-D17463	17.463	0.6875	18	123	73
D4003-NHA-D19050	D4003-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)
D4005-NHA-D03175	D4005-CHA-D03175	3.175	0.125	6	62	28
D4005-NHA-D03571	D4005-CHA-D03571	3.571	0.1406	6	66	28
D4005-NHA-D03970	D4005-CHA-D03970	3.97	0.1563	6	74	36
D4005-NHA-D04366	D4005-CHA-D04366	4.366	0.1719	6	74	36
D4005-NHA-D04763	D4005-CHA-D04763	4.763	0.1875	6	82	44
D4005-NHA-D05159	D4005-CHA-D05159	5.159	0.2031	6	82	44
D4005-NHA-D05558	D4005-CHA-D05558	5.558	0.2188	6	82	44
D4005-NHA-D05949	D4005-CHA-D05949	5.949	0.2342	6	82	44
D4005-NHA-D06350	D4005-CHA-D06350	6.35	0.25	8	91	53
D4005-NHA-D06746	D4005-CHA-D06746	6.746	0.2656	8	91	53
D4005-NHA-D07145	D4005-CHA-D07145	7.145	0.2813	8	91	53
D4005-NHA-D07541	D4005-CHA-D07541	7.541	0.2969	8	91	53
D4005-NHA-D07938	D4005-CHA-D07938	7.938	0.3125	8	91	53
D4005-NHA-D08344	D4005-CHA-D08344	8.344	0.3281	10	103	61
D4005-NHA-D08733	D4005-CHA-D08733	8.733	0.3438	10	103	61
D4005-NHA-D09129	D4005-CHA-D09129	9.129	0.3594	10	103	61
D4005-NHA-D09525	D4005-CHA-D09525	9.525	0.375	10	103	61
D4005-NHA-D09921	D4005-CHA-D09921	9.921	0.3906	10	103	61
D4005-NHA-D10320	D4005-CHA-D10320	10.32	0.4063	12	118	71
D4005-NHA-D10716	D4005-CHA-D10716	10.716	0.4219	12	118	71
D4005-NHA-D11111	D4005-CHA-D11111	11.111	0.4374	12	118	71
D4005-NHA-D11509	D4005-CHA-D11509	11.509	0.4531	12	118	71
D4005-NHA-D11908	D4005-CHA-D11908	11.908	0.4688	12	118	71
D4005-NHA-D12300	D4005-CHA-D12300	12.3	0.4843	14	124	77
D4005-NHA-D12700	D4005-CHA-D12700	12.7	0.5	14	124	77
D4005-NHA-D13100	D4005-CHA-D13100	13.1	0.5157	14	124	77
D4005-NHA-D13891	D4005-CHA-D13891	13.891	0.5469	14	124	77
D4005-NHA-D14288	D4005-CHA-D14288	14.288	0.5625	16	133	83
D4005-NHA-D14684	D4005-CHA-D14684	14.684	0.5781	16	133	83
D4005-NHA-D15083	D4005-CHA-D15083	15.083	0.5938	16	133	83
D4005-NHA-D15479	D4005-CHA-D15479	15.479	0.6094	16	133	83
D4005-NHA-D15875	D4005-CHA-D15875	15.875	0.625	16	133	83
D4005-NHA-D17463	D4005-CHA-D17463	17.463	0.6875	18	143	93
D4005-NHA-D19050	D4005-CHA-D19050	19.05	0.75	20	153	101

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

	Material to be machined	Tensile Strength Example [N/mm²]	Cutting speed V. [m/min]	feed f [mm/rev]
P	Alloy Steels.Cast Steels	<600 N/mm² S137.C22.GS38	120-140	0.3	0.4	0.6	0.7	0.8	0.8
		<700 Nmm² St52,C35,GS52	100-120	0.3	0.4	0.6	0.7	0.8	0.8
		>700 N/mm² S:52.C35.GS52	80-100	0.3	0.4	0.6	0.7	0.8	0.8
	Alloyed Steel	<900 Nmm² St52.C35,GS52	80-95	3	0.4	6	0.7	0.8	8
		<1000 N/mm² 90MnCrV8.100Cr6	65-80	0.3	0.4	0.6	0.7	0.8	0.8
		>1000 Nmm² 90MnCN8,100Cr6	45-65	24	0.3	0.4	0.5	0.6	0.7
K	Grey CastIron Alloy	<200 HB GG20 GG25,GTS45	120-140	0.3	0.4	6	7	0.8	0.8
	Grey CastIron Alloy	<250 HB GG30.GTW40	100-120	0.3	0.4	0.6	0.7	0.8	0.8
	SpheroidalGraphite Castiron,CGI	>250 HB GG40.GTS70	100-120	0.3	4	0.6	0.7	0.8	8
		<600 N/mm² GGG40.GGG50	100-120	0.3	4	0.6	0.7	0.8	0.8
		>60O N/mm² GGG60.GGV(CGD	80-100	0.3	0.4	6	0.7	0.8	8

Four-Flute Drill Application Cases

Ductile Iron Steering Parts Drilling

Background

An agricultural equipment supplier manufactures steering linkage parts, which are made from ductile cast iron. In manufacturing operations, thousands of high-precision holes are required without burr formation.

Challenge

Workpiece: Steering Column Link Arm
Material: Ductile Cast Iron (GGG50)
Hardness: 180–220 HB
Hole Type: Through Hole
Hole Depth: 3×D (82.5 mm)
Requirement: Higher feed rates with longer tool life and excellent hole quality.

Solution

Tool Used: Ø34.9 mm Four-Flute High Feed Drill
Coolant Type: External Coolant
Machine Tool: Horizontal CNC Machining Center
Spindle Speed: 950 rpm
Feed Rate: 0.152 mm/rev (145 mm/min)

Results

Burr formation could be avoided to eliminate deburring, decreasing over 84% tooling costs. The machined holes were increased from about 300 holes to 600 holes, and the cycle time was decreased from 37s to 34s.

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How JINOO Manufactures Four-Flute Drill Bits?

Precision CNC Grinding Machines

- WALTER Helitronic Power 400L
- WALTER Helitronic Vision 400L
- WALTER Helitronic Micro 400L
- Rollomatic NP5
- ANCA MX5
- ANCA MX7
These high-precision 5-axis grinding machines are used to optimize the production of four-flute drill bits with superior dimensional accuracy, enabling their extended tool life and cutting performance.
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These high-precision 5-axis grinding machines are used to optimize the production of four-flute drill bits with superior dimensional accuracy, enabling their extended tool life and cutting performance.
- WALTER Helitronic Power 400L
- WALTER Helitronic Vision 400L
- WALTER Helitronic Micro 400L
- Rollomatic NP5
- ANCA MX5
- ANCA MX7
These high-precision 5-axis grinding machines are used to optimize the production of four-flute drill bits with superior dimensional accuracy, enabling their extended tool life and cutting performance.
Get instant Quote
- WALTER Helitronic Power 400L
- WALTER Helitronic Vision 400L
- WALTER Helitronic Micro 400L
- Rollomatic NP5
- ANCA MX5
- ANCA MX7
These high-precision 5-axis grinding machines are used to optimize the production of four-flute drill bits with superior dimensional accuracy, enabling their extended tool life and cutting performance.
Get instant Quote
- WALTER Helitronic Power 400L
- WALTER Helitronic Vision 400L
- WALTER Helitronic Micro 400L
- Rollomatic NP5
- ANCA MX5
- ANCA MX7
These high-precision 5-axis grinding machines are used to optimize the production of four-flute drill bits with superior dimensional accuracy, enabling their extended tool life and cutting performance.
Get instant Quote
- WALTER Helitronic Power 400L
- WALTER Helitronic Vision 400L
- WALTER Helitronic Micro 400L
- Rollomatic NP5
- ANCA MX5
- ANCA MX7
These high-precision 5-axis grinding machines are used to optimize the production of four-flute drill bits with superior dimensional accuracy, enabling their extended tool life and cutting performance.
Get instant Quote
- WALTER Helitronic Power 400L
- WALTER Helitronic Vision 400L
- WALTER Helitronic Micro 400L
- Rollomatic NP5
- ANCA MX5
- ANCA MX7
These high-precision 5-axis grinding machines are used to optimize the production of four-flute drill bits with superior dimensional accuracy, enabling their extended tool life and cutting performance.
Get instant Quote

Advanced Quality Inspection System

1.ZOLLER G3 Tool Measurement: Applied for verifying the geometry and specifications of four-flute drill bits with measurement tolerances within ±2 μm.
2.PG1000 Optical Inspection: Used to inspect 4-flute drill bits with microscopic analysis of cutting-edge treatment, coating and surfaces under magnification.
3.Parlec Tool Presetting: Utilized to inspect the 4-flute drill bit length, clamping centering precision and runout to ensure machine compatibility.

You can trust our tool quality based on the advanced quality inspection system we utilize, ensuring our strict quality control and tool consistency.
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1.ZOLLER G3 Tool Measurement: Applied for verifying the geometry and specifications of four-flute drill bits with measurement tolerances within ±2 μm.
2.PG1000 Optical Inspection: Used to inspect 4-flute drill bits with microscopic analysis of cutting-edge treatment, coating and surfaces under magnification.
3.Parlec Tool Presetting: Utilized to inspect the 4-flute drill bit length, clamping centering precision and runout to ensure machine compatibility.

You can trust our tool quality based on the advanced quality inspection system we utilize, ensuring our strict quality control and tool consistency.
Get instant Quote
1.ZOLLER G3 Tool Measurement: Applied for verifying the geometry and specifications of four-flute drill bits with measurement tolerances within ±2 μm.
2.PG1000 Optical Inspection: Used to inspect 4-flute drill bits with microscopic analysis of cutting-edge treatment, coating and surfaces under magnification.
3.Parlec Tool Presetting: Utilized to inspect the 4-flute drill bit length, clamping centering precision and runout to ensure machine compatibility.

You can trust our tool quality based on the advanced quality inspection system we utilize, ensuring our strict quality control and tool consistency.
Get instant Quote

Fine-grain Carbide Tool Material

1.Our high-quality carbide bar stocks are sourced from GESAC, Kennametal, Sandvik, Gühring, and CB Ceratizit.

2.The ultra-fine carbide substrates feature high density and durability.

3.The cobalt content in our tungsten carbide typically ranges from 10% to 12%.

4.The tool life of four-flute drill bits can be increased by over 1.5 times with high wear resistance.
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Virgin Carbide Instead of Recycled Carbide

Virgin tungsten carbide we use in our four-flute drill bits:
- Small and uniform grain sizes
- Extended tool life
- High stability
- High density
- Pure structure
Recycled carbide used in poor-quality drills:
- Mixed grain size
- Many impurities
- Lower density
- Many defects
- Possible tool breakage
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Reliable Coating Partners

1.We apply premium AITiN nano coatings from Oerlikon Balzers.

2.JINOO’s 4-flute drill bits can be customized with advanced coating technology to improve their cutting performance.

3.Premium coatings feature enhanced heat and wear resistance.

4.Coatings can promote the tool service life, enabling their smooth cutting.
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High-performance Coating vs. Poor-quality Coating

High-quality coatings used in our four-flute drill bits:
- No peeling
- Tight tolerances
- Uniform thickness
- Stable wear resistance
- Smooth surfaces
Competitor’s poor-quality coatings used in low-grade drill bits:
- Prone to edge chipping
- Uneven thickness
- Obvious pores
- Rapid wear
- Significant color difference
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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
As a professional four-flute drill bit manufacturer, we keep optimizing our quality management system and manufacturing capabilities to deliver unmatched tool quality.
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
As a professional four-flute drill bit manufacturer, we keep optimizing our quality management system and manufacturing capabilities to deliver unmatched tool quality.
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
As a professional four-flute drill bit manufacturer, we keep optimizing our quality management system and manufacturing capabilities to deliver unmatched tool quality.
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
As a professional four-flute drill bit manufacturer, we keep optimizing our quality management system and manufacturing capabilities to deliver unmatched tool quality.
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
As a professional four-flute drill bit manufacturer, we keep optimizing our quality management system and manufacturing capabilities to deliver unmatched tool quality.
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
As a professional four-flute drill bit manufacturer, we keep optimizing our quality management system and manufacturing capabilities to deliver unmatched tool quality.
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
As a professional four-flute drill bit manufacturer, we keep optimizing our quality management system and manufacturing capabilities to deliver unmatched tool quality.
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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
As a professional four-flute drill bit manufacturer, we keep optimizing our quality management system and manufacturing capabilities to deliver unmatched tool quality.
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
As a professional four-flute drill bit manufacturer, we keep optimizing our quality management system and manufacturing capabilities to deliver unmatched tool quality.
Get instant Quote

Technical Support & Tool Optimization

1.JINOO can provide you with OEM and ODM cutting tool solutions.

2.Flexible tool selection is available with professional technical support.

3.We are committed to tool optimization with continuous professional training.

4.We also offer you precise tool grinding, and you can save over 38% tooling costs after regrinding for 3 times.
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Testimonials

“We keep searching for high-feed carbide drills for steel machining, and the D4000 four-flute drill bits can achieve stable machining with higher working efficiency. They have superior hole-making stability and maintain a balance between hole quality and feed rates. Compared with standard solid carbide drill bits, the tool life of our solid carbide four-flute drill bits is greatly extended. ”
Sean Miller
Production Engineer

FAQ about Four-Flute Drill Bits

What is the lead time of four-flute drill bits for production?

Our production times for the four-flute drill bits will normally be between 7 and 15 days because of the premium carbide bar stocks, which need to be shipped from Germany. As for the lead time, we work with world-famous postal companies such as DHL, FedEx and UPS to secure the time of delivery.

Do you provide customized services of four-flute drill bits?

Of course! We furnish non-standard customization beyond standard sizes according to your personalized needs. Factors such as materials, diameter, flute length, and coating selection of JINOO’s Four-Flute Drill Bits can all be modified to meet your exacting requirements. We will provide you with cutting-edge solutions to ensure an exceptional user experience.

What is your MOQ (Minimum Order Quantity) of 4-flute drill bits?

For our standard size of solid carbide four-flute drill bits, we have a minimum order quantity of 5 pieces. Beyond that, if you want JINOO to customize tools for you, there’s generally no minimum order quantity for non-standard tools, and even a small order can be accepted.

What payment methods do you accept for solid carbide four-flute drill bits?

The payment method for our four-flute drill bits can be flexible. We usually accept bank transfer, credit card, and PayPal. If you have other requirements about the payment method, we can modify the payment method based on your order.

Is a 2-flute or 3-flute drill better for aluminum?

For most aluminum machining, 2-flute drill bits for aluminum are always better. Drilling aluminum will generate long and continuous chips as it is soft and ductile. 2-flute solid carbide drill bits feature larger flute space for efficient chip evacuation and less chip clogging. This is beneficial to high-speed drilling of aluminum parts.

However, 3- flute solid carbide drill bits can achieve superior feed rates and higher hole quality with properly controlled chip evacuation.

Why choose a four-flute carbide drill bit instead of a standard two-flute drill bit?

Compared with conventional two-flute solid carbide drill bits, four-flute solid carbide drill bits feature higher tool rigidity and can deliver higher feed rates. Their feed rates can be improved by 40% to 80% with the maintenance of hole accuracy and machining efficiency.

What drilling depths are available for the D4000 four-flute carbide drill bits?

The D4000 series four-flute carbide drill bits are available in 3D and 5D drilling depths, enabling them suitable for machining shallow to medium-depth holes. 3D four-flute carbide drill bits can deliver higher tool rigidity, while 5D four-flute drill bits can provide improved deep hole machining flexibility in steel and stainless steel machining.

What machines are suitable for the D4000 solid carbide four-flute drills?

The D4000 four-flute carbide drill bits are designed for being used on CNC machining centers, drilling machines, and milling machines. Featuring the standard cylindrical shank, our four-flute drill bits can be combined with ER collet chucks and hydraulic holders to achieve efficient drilling operations.

How can I improve drilling performance with a four-flute carbide drill?

We recommend you combine high-performance four-flute drill bits with proper cutting parameters and sufficient coolants. You should ensure effective chip evacuation with minimal tool runout to greatly enhance hole surface finishes and tool life.

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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 4-flute drill bits 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-value cutting solutions for our customers.