UNIVERSAL DRILLS

Solid Carbide Universal Drills for High-Feed Drilling.

D2400-Series

Universal Drill Design Highlights

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

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Universal Drill Types

3×D Universal Drills

Suitable for general drilling of shallow holes and high-speed machining with higher rigidity.

P: Steel
H: Hardened Steel
K: Cast Iron
M: Stainless Steel
4 Flutes
3×D
Internal Coolant Design
Oerlikon HELICA Coating
DIN 6535-HA
Drilling
Straight Shank
Right-Hand Cutting
140° Point Angle
Solid Carbide Construction
M7

5×D Universal Drills

Well-suited for deep hole drilling with stable chip evacuation.

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

8×D Universal Drills

Suitable for machining deeper holes with consistent accuracy.

P: Steel
H: Hardened Steel
K: Cast Iron
M: Stainless Steel
4 Flutes
8×D
Internal Coolant Design
Oerlikon HELICA Coating
DIN 6535-HA
Drilling
Straight Shank
Right-Hand Cutting
140° Point Angle
Solid Carbide Construction
M7

D2400-Series

Why Choose Our Universal Drill Bits?

JINOO keeps upgrading universal drill bits for metal to enhance their cutting performance and improve their features.

Higher-versatility of D2400-Series Universal Drills

Solid Carbide Construction

Our universal drill bits are manufactured from ultra-fine grain substrates with a grain size of 0.4μm.

Improved-cutting-stability of D2400-Series Universal Drills

Oerlikon Coating Technology

To enhance the drilling performance of our universal drills, Oerlikon HELICA high-performance coatings can be applied.

Efficient-chip-removal of D2400-Series Universal Drills

140° Point Angle Design

Our universal drills are designed with a 140° point angle to promote continuous cutting.

Superior-hole-quality of D2400-Series Universal Drills

Cutting Edge Preparation

Special cutting-edge treatment, such as edge honing, is used in the cutting-edge design of universal drills, enabling micro-honed cutting edges.

Higher-dimensional-accuracy of D2400-Series Universal Drills

Four-Flute Geometry

Our high-feed universal drills feature 4 helical flutes, which are optimized with smoother chip flow channels.

Extended-tool-life of D2400-Series Universal Drills

Reinforced Web Core

Our universal drills are engineered with a thicker core, which is reinforced with high tool rigidity.

Universal Drill Geometry Breakdown

1.0.4μm Solid Carbide Construction for Wear Resistance

0.4 μm carbide substrates can enhance the cutting-edge strength of universal drills, improving their wear resistance.

2.Oerlikon Coating for Longer Tool Life

Oerlikon HELICA high-performance coatings can reduce tool friction and extend the tool life.

3.140° Point Angle for Less Vibration

The angle design can decrease the axial thrust force and burr formation, which can reduce the spindle load vibration.

4.Honed Cutting Edges for Less Breakage

Honed cutting edges are optimized to ensure more stability at entry and superior hole wall quality with reduced edge chipping risk.

5.Helical Flute Geometry for Efficient Chip Flow

4 helical flutes are optimized with smoother chip flow channels to achieve improved vibration control.

6.Reinforced Core for Higher Strength

The reinforced core greatly increases the torsional strength and machining stability, especially in 5D depth drilling.

Geometry Breakdown of D2400-Series Universal Drills

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	2
Overall Length	50 / 60 / 75 / 100 / 150 / 200mm / Customised Length
Shank Diameter	4 / 6 / 8 / 10 / 12 / 14 / 16/ 18 / 20mm / Customised Diameter

D2400-Series

Universal Drill Specifications

Standard Universal Drill Size Range
Carbide Substrate
Cutting Parameters
Quick Selection Guide

External Coolant	Internal Coolant	Diameter (mm)	Fraction Size	Diameter (in)	Shank Diameter (in)	Overal Length OAL (in)	Flute Length (in)	Max Cutting Depth (in)	Shank Length (in)
D2403-NHA-D03175	D2403-CHA-D03175	3.175	1/8	0.125	6	62	20	14	36
D2403-NHA-D03571	D2403-CHA-D03571	3.571	9/64	0.1406	6	62	20	14	36
D2403-NHA-D03970	D2403-CHA-D03970	3.97	5/32	0.1563	6	66	24	17	36
D2403-NHA-D04366	D2403-CHA-D04366	4.366	11/64	0.1719	6	66	24	17	36
D2403-NHA-D04763	D2403-CHA-D04763	4.763	3/16	0.1875	6	66	28	20	36
D2403-NHA-D05159	D2403-CHA-D05159	5.159	13/64	0.2031	6	66	28	20	36
D2403-NHA-D05558	D2403-CHA-D05558	5.558	7/32	0.2188	6	66	28	20	36
D2403-NHA-D05949	D2403-CHA-D05949	5.949	15/64	0.2344	6	66	28	20	36
D2403-NHA-D06350	D2403-CHA-D06350	6.35	1/4	0.25	8	79	34	24	36
D2403-NHA-D06746	D2403-CHA-D06746	6.746	17/64	0.2656	8	79	34	24	36
D2403-NHA-D07145	D2403-CHA-D07145	7.145	9/32	0.2813	8	79	41	29	36
D2403-NHA-D07541	D2403-CHA-D07541	7.541	19/64	0.2969	8	79	41	29	36
D2403-NHA-D07938	D2403-CHA-D07938	7.938	5/16	0.3125	8	79	41	29	36
D2403-NHA-D08344	D2403-CHA-D08344	8.334	21/64	0.3281	10	89	47	35	40
D2403-NHA-D08733	D2403-CHA-D08733	8.733	11/32	0.3438	10	89	47	35	40
D2403-NHA-D09129	D2403-CHA-D09129	9.129	23/64	0.3594	10	89	47	35	40
D2403-NHA-D09525	D2403-CHA-D09525	9.525	3/8	0.375	10	89	47	35	40
D2403-NHA-D09921	D2403-CHA-D09921	9.921	25/64	0.3906	10	89	47	35	40
D2403-NHA-D10320	D2403-CHA-D10320	10.32	13/32	0.4063	12	102	55	40	45
D2403-NHA-D10716	D2403-CHA-D10716	10.716	27/64	0.4219	12	102	55	40	45
D2403-NHA-D11111	D2403-CHA-D11111	11.111	7/16	0.4375	12	102	55	40	45
D2403-NHA-D11509	D2403-CHA-D11509	11.509	29/64	0.4531	12	102	55	40	45
D2403-NHA-D11908	D2403-CHA-D11908	11.908	15/32	0.4688	12	102	55	40	45
D2403-NHA-D12300	D2403-CHA-D12300	12.3	31/64	0.4843	14	107	60	43	45
D2403-NHA-D12700	D2403-CHA-D12700	12.7	1/2	0.5	14	107	60	43	45
D2403-NHA-D13100	D2403-CHA-D13100	13.1	33/64	0.5157	14	107	60	43	45
D2403-NHA-D13891	D2403-CHA-D13891	13.891	35/64	0.5469	14	107	60	43	45
D2403-NHA-D14288	D2403-CHA-D14288	14.288	9/16	0.5625	16	115	65	45	48
D2403-NHA-D14684	D2403-CHA-D14684	14.684	37/64	0.5781	16	115	65	45	48
D2403-NHA-D15083	D2403-CHA-D15083	15.083	19/32	0.5938	16	115	65	45	48
D2403-NHA-D15479	D2403-CHA-D15479	15.479	39/64	0.6094	16	115	65	45	48
D2403-NHA-D15875	D2403-CHA-D15875	15.875	5/8	0.625	16	115	65	45	48
D2403-NHA-D17463	D2403-CHA-D17463	17.463	11/16	0.6875	18	123	73	51	48
D2403-NHA-D19050	D2403-CHA-D19050	19.05	3/4	0.75	20	131	79	55	50

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	Brinell Hardness	Rockwell Hardness	Cutting Speed Vc (m/min)		Feed Per Revolution fn (mm/rev)
Materials			Brinell Hardness	Rockwell Hardness	Coolant Type		Drill Bits Diameter d
ISO			HB	HRC	External Coolant	Internal Coolant	3	4	6	8	10	12	14	16	18	20
P	P1	Free-Cutting Steel	<125		90	100	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		90	100	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	85	100	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	85	100	0.07	0.1	0.13	0.16	0.18	0.2	0.22	0.25	0.28	0.3
	P11	Ferritic Stainless Steel, Martensitic Stainless Steel	250-450	38-50	–	60	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	60	0.07	0.1	0.12	0.14	0.16	0.18	0.2	0.22	0.24	0.26
H	H12	Hardened Stainless Steel		33-50	–	45	0.05	0.06	0.08	0.11	0.13	0.15	0.17	0.18	0.19	0.2
M	M1	Austenitic Stainless Steel	<150		–	60	0.07	0.1	0.12	0.14	0.15	0.18	0.2	0.22	0.24	0.26
	M2	High-Strength Austenitic Stainless Steel	150-230		–	55	0.07	0.1	0.12	0.14	0.15	0.18	0.2	0.22	0.24	0.26
	M4	Duplex Stainless Steel	135-275		–	45	0.05	0.06	0.08	0.11	0.13	0.15	0.17	0.18	0.19	0.2
K	K1	Gray Cast Iron	120-290	<32	90	100	0.07	0.1	0.13	0.16	0.18	0.2	0.22	0.25	0.28	0.3
	K2	Compacted Graphite Iron（CGI）	120-290	<32	90	100	0.07	0.1	0.13	0.16	0.18	0.2	0.22	0.25	0.28	0.3
	K3	Malleable Cast Iron	130-260	<28	90	100	0.07	0.1	0.13	0.16	0.18	0.2	0.22	0.25	0.28	0.3
	K4	Ductile Cast Iron	180-350	<43	70	80	0.07	0.1	0.13	0.16	0.18	0.2	0.22	0.25	0.28	0.3

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

Universal Drill Application Cases

88% Decreased Cycle Time in Valve Body Machining

Background

A precision-machining supplier performs the medium-volume manufacturing of stainless steel valve bodies, which require precision through holes with high hole accuracy and excellent hole surfaces.

Challenge

Workpiece: Hydraulic Valve Body
Material: SUS304 Austenitic Stainless Steel
Hardness: 190–210 HB
Hole Type: Through Hole
Hole Depth: 3×D
Requirement: Maintain smooth chip evacuation with excellent hole quality, reducing tool changes with high production efficiency.

Solution

Tool Used: Ø10 mm Solid Carbide Universal Drill
Coolant Type: Internal Coolant
Machine Tool: Vertical CNC Machining Center
Spindle Speed: 3,200 rpm
Feed Rate: 0.22 mm/rev (≈704 mm/min)

Results

After using our optimized universal drills, over 1,2000 valve bodies can be machined in manufacturing. The tool life can be greatly enhanced by nearly 66% with less tooling costs.

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Real Case of D2400-Series Universal Drill

How JINOO Manufactures Universal Drills?

Precision CNC Grinding Machines

These world-class 5-axis devices can deliver tight dimensional tolerances and concentricity of universal drills, enabling their excellent roundness and straightness.
- WALTER Helitronic Power 400L
- WALTER Helitronic Vision 400L
- WALTER Helitronic Micro 400L
- Rollomatic NP5
- ANCA MX5
- ANCA MX7
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These world-class 5-axis devices can deliver tight dimensional tolerances and concentricity of universal drills, enabling their excellent roundness and straightness.
- WALTER Helitronic Power 400L
- WALTER Helitronic Vision 400L
- WALTER Helitronic Micro 400L
- Rollomatic NP5
- ANCA MX5
- ANCA MX7
Get instant Quote
These world-class 5-axis devices can deliver tight dimensional tolerances and concentricity of universal drills, enabling their excellent roundness and straightness.
- WALTER Helitronic Power 400L
- WALTER Helitronic Vision 400L
- WALTER Helitronic Micro 400L
- Rollomatic NP5
- ANCA MX5
- ANCA MX7
Get instant Quote
These world-class 5-axis devices can deliver tight dimensional tolerances and concentricity of universal drills, enabling their excellent roundness and straightness.
- WALTER Helitronic Power 400L
- WALTER Helitronic Vision 400L
- WALTER Helitronic Micro 400L
- Rollomatic NP5
- ANCA MX5
- ANCA MX7
Get instant Quote
These world-class 5-axis devices can deliver tight dimensional tolerances and concentricity of universal drills, enabling their excellent roundness and straightness.
- WALTER Helitronic Power 400L
- WALTER Helitronic Vision 400L
- WALTER Helitronic Micro 400L
- Rollomatic NP5
- ANCA MX5
- ANCA MX7
Get instant Quote
These world-class 5-axis devices can deliver tight dimensional tolerances and concentricity of universal drills, enabling their excellent roundness and straightness.
- WALTER Helitronic Power 400L
- WALTER Helitronic Vision 400L
- WALTER Helitronic Micro 400L
- Rollomatic NP5
- ANCA MX5
- ANCA MX7
Get instant Quote

Advanced Quality Inspection System

The advanced quality inspection system is utilized to ensure tool integrity and the geometry design, ensuring consistent quality control.

1. ZOLLER G3 Tool Measurement: Used to verify the universal drill geometry and dimensional parameters like point angle and concentricity with measurement accuracy within ±2 μm.

2. PG1000 Optical Inspection: After verifying drill dimensions, microscopic optical inspection is utilized to examine edge preparation and surface integrity to identify edge defects under magnification up to 200×.

3. Parlec Tool Presetting: Before final shipment, the Parlec system is used to inspect tool length, runout, and positioning accuracy to ensure machine compatibility and runout control within 3 μm.

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The advanced quality inspection system is utilized to ensure tool integrity and the geometry design, ensuring consistent quality control.

1. ZOLLER G3 Tool Measurement: Used to verify the universal drill geometry and dimensional parameters like point angle and concentricity with measurement accuracy within ±2 μm.

2. PG1000 Optical Inspection: After verifying drill dimensions, microscopic optical inspection is utilized to examine edge preparation and surface integrity to identify edge defects under magnification up to 200×.

3. Parlec Tool Presetting: Before final shipment, the Parlec system is used to inspect tool length, runout, and positioning accuracy to ensure machine compatibility and runout control within 3 μm.
Get instant Quote
The advanced quality inspection system is utilized to ensure tool integrity and the geometry design, ensuring consistent quality control.

1. ZOLLER G3 Tool Measurement: Used to verify the universal drill geometry and dimensional parameters like point angle and concentricity with measurement accuracy within ±2 μm.

2. PG1000 Optical Inspection: After verifying drill dimensions, microscopic optical inspection is utilized to examine edge preparation and surface integrity to identify edge defects under magnification up to 200×.

3. Parlec Tool Presetting: Before final shipment, the Parlec system is used to inspect tool length, runout, and positioning accuracy to ensure machine compatibility and runout control within 3 μm.
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 rigid carbide substrates can deliver excellent heat and wear resistance due to their high density.

3. We can ensure the cobalt content in our tungsten carbide ranges from 10% to 12.

4. The universal drill bit life can be increased by over 1.5 times.
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Virgin Carbide Instead of Recycled Carbide

Virgin tungsten carbide we use in our universal drills:
- Fine and uniform grains
- No impurities
- Longer tool life
- Superior structural stability
- High density
Recycled carbide used in manufacturing poor-quality drills:
- Mixed grain size
- Unevenly distributed cobalt phase
- Porous with impurities
- Many defects contained
- Prone to breakage
- Short lifespan
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Reliable Coating Partners

1. JINOO uses high-quality HELICA coatings from Oerlikon Balzers to improve the cutting performance of universal drills.

2. JINOO can customize universal drills with different coating options.

3. Advanced coatings can deliver high durability and wear resistance.

4. They can attain less tool friction in high-speed machining to maintain drilling stability and a longer lifespan.
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High-performance Coating vs. Poor-quality Coating

High-quality coatings used in our universal drills:
- Strong adhesion
- Uniform thickness
- Dense structure without pores
- High density and wear resistance
- Smooth surfaces and uniform color
Poor-quality coatings used in low-grade drill bits:
- Weak adhesion
- Uneven thickness
- Loose structure with pores
- Poor density
- Rough surfaces with color difference
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ISO 9001 Quality Management System

As a professional universal drill manufacturer, we can ensure the unmatched tool quality based on our quality management system and continuous quality assurance training.
- 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
Get instant Quote
As a professional universal drill manufacturer, we can ensure the unmatched tool quality based on our quality management system and continuous quality assurance training.
- 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
Get instant Quote
As a professional universal drill manufacturer, we can ensure the unmatched tool quality based on our quality management system and continuous quality assurance training.
- 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
Get instant Quote
As a professional universal drill manufacturer, we can ensure the unmatched tool quality based on our quality management system and continuous quality assurance training.
- 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
Get instant Quote
As a professional universal drill manufacturer, we can ensure the unmatched tool quality based on our quality management system and continuous quality assurance training.
- 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
Get instant Quote
As a professional universal drill manufacturer, we can ensure the unmatched tool quality based on our quality management system and continuous quality assurance training.
- 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
Get instant Quote
As a professional universal drill manufacturer, we can ensure the unmatched tool quality based on our quality management system and continuous quality assurance training.
- 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
Get instant Quote
As a professional universal drill manufacturer, we can ensure the unmatched tool quality based on our quality management system and continuous quality assurance training.
- 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
Get instant Quote
As a professional universal drill manufacturer, we can ensure the unmatched tool quality based on our quality management system and continuous quality assurance training.
- 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
Get instant Quote

Technical Support & Tool Optimization

1. We can provide you with a versatile tool selection with a flexible MOQ.

2. Our engineering team will provide you with after-sales technical support based on continuous training on tool optimization.

3. Regrinding and resharpening services are available to maintain edge consistency and accuracy.
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Testimonials

“We initially used the D2100-Series General Purpose Drill Bits, and we have achieved relatively satisfying results. After switching to the D2400 series, we really found out that it significantly improved machining stability and tool service life. We could enhance spindle speeds with less burr formation to limit tool wear. The D2400-Series Universal Drills are precision carbide drilling tools, which really helped us decrease tool changes and increase machining consistency in steel machining. JINOO is the reliable carbide drill supplier that you can trust.”
Ella Tsu
Production Manager

FAQ about Universal Drills

What is the lead time of universal drills for production?

Our production times for the D2400-Series Universal Drills will normally be between 7 and 15 days because of the premium carbide bar stocks, which should be shipped from Germany. As for the lead time, we work with world-famous postal companies such as DHL, FedEx and UPS to ensure delivery of our industrial carbide drill bits.

Do you provide customized services of universal drills?

Of course! We can provide you with non-standard customization beyond standard sizes to suit your personal requirements of carbide drills for a machining center. Factors such as materials, tool diameter, flute length, and coating selection of JINOO’s Universal Drills can all be modified to meet your exacting needs. We will provide you with advanced tooling solutions to offer you an exceptional user experience.

What is your MOQ (Minimum Order Quantity) of universal drills?

For the standard size of Universal Drills and solid carbide drills for steel, 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 for universal drills do you accept?

The payment method of our D2400-Series Universal Drills can be flexible. We usually accept bank transfer, credit card, and PayPal. If you have other requirements about the payment method, we can modify it according to your order.

Why choose universal drills instead of indexable drills for precision hole machining?

Indexable drills can achieve high cost-effectiveness when machining larger-diameter holes. However, universal drills can achieve higher dimensional accuracy and surface finishes in precision-hole machining of steel parts, especially suitable for applications where hole tolerances count.

What are the three types of drill bits?

In modern CNC machining, drill bits are commonly classified into three types: twist drills, step drills, and center drills. All of them serve different roles in accurate and efficient drilling.

For general-purpose drilling operations, twist drills are extensively used for machining aluminium, steel, and cast iron.

Step drills are typically used for machining thin materials, such as thin sheet metal, to create larger holes.

Center drills are commonly designed for machining high-precision starting holes and centering points used for subsequent drilling or turning.

What materials can universal carbide drills effectively machine?

D2400 universal drill bits are suitable for machining a wide variety of materials, like steel and cast iron. Their optimized tool geometry helps keep a balance between improved tool rigidity and stable chip evacuation. However, their cutting performance will be determined by the specific tool geometry and coating selection. When it comes to harder materials such as titanium alloys, specialized drill bits should be chosen to deliver more effectiveness.

What point angle is commonly used in universal drill bits?

Universal drill bits are commonly designed with point angles from 135° to 140° to deliver stable cutting performance and decreased thrust forces. D2400-Series Universal Drills adopt the 140° point angle to enhance centering accuracy and evenly distribute cutting loads. Larger point angles are typically designed for general drilling of steel and cast iron.

How does flute geometry affect universal drill performance?

Carbide universal drill bits for CNC machining should be designed with a unique flute design to ensure smooth chip evacuation in general-purpose machining. The proper flute design of high-rigidity carbide drills can decrease the risk of chip congestion and manage heat generation, which is crucial in 3D or 5D deep hole drilling.

What drilling depth is typically recommended for universal drills?

Most universal drills for stainless steel or alloy steel feature standard drilling depth ratios like 3×D and 5×D. 3D universal drill bits always demonstrate improved tool rigidity and cutting stability, which is well-suited for machining shallow holes with higher efficiency. 5D universal drill bits feature higher drilling depth, making them suitable for drilling deep holes with stable chip evacuation. Choosing proper drill bit lengths largely depends on hole depth and machine stability.

How can drilling stability be improved when using universal drill bits?

When you use universal carbide drills for steel, you should first ensure firm tool clamping and proper spindle speeds and feeds to improve the drilling stability. Moreover, using the coolants and lubrication properly is beneficial for dissipating heat and improving chip flow. Choosing the proper drill bit geometry and maintaining sufficient machine rigidity can also promote consistent hole quality.

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ABOUT US

JINOO Tools Group is a “National High-Tech Enterprise”, which was founded in 2006 and is committed to the development and manufacturing of solid carbide cutting tools. Our cutting tools are widely used in the automotive, aerospace, and equipment manufacturing industries.