Carbide Micro Drills

Application

Specifications

Diameter tolerance is (+0/-0.0002") Call for specific diameters

Two Flute - Four Facet Point

Item No.	Outside Diameter	Flute Length	Specification
CBMD1	0.0015"	.020”	DRILL N/R.020"FL 90PT
CBMD2	0.0020"	.015”	DRILL 015FL 90PT (50)
CBMD3	0.0020"	.020”	DRILL 020FL 90PT (50)
CBMD4	0.0020"	.045’	DRILL 045FL 90PT (50)
CBMD5	0.0021"	.032”	DRILL 032FL 90PT (50)
CBMD6	0.0022"	.015”	DRILL N/S .015"FL 90PT
CBMD7	0.0022"	.020”	DRILL N/R .020"FL 90PT
CBMD8	0.0022"	.020”	DRILL 020FL 90PT (50)
CBMD9	0.0022"	.025”	DRILL N/R .025"FL 90PT
CBMD10	0.0022"	.025”	DRILL 025FL 90PT (50)
CBMD11	0.0022"	.045”	DRILL 045FL 90PT (50)
CBMD12	0.0025"	.017”	DRILL .017"FL 90PT N/S
CBMD13	0.0025"	.017”	DRILL 017FL 90PT
CBMD14	0.0025"	.030”	DRILL N/S .030"FL 90PT
CBMD15	0.0026"	.020”	DRILL 020FL 130PT
CBMD16	0.0029"	.035”	DRILL .035"FL 118PT
CBMD17	0.0029"	.035”	DRILL .035"FL 90PT
CBMD18	0.0031"	.015”	DRILL N/S .015"FL 90PT

Advantages

High Precision: Allows for the creation of highly accurate and consistent micro-sized holes.
Customizability: Available in various sizes and with optional specialized coatings to suit specific application needs.
Innovative Design: Features unique flute designs for improved chip removal and coolant flow, reducing heat buildup.
Versatility: Compatible with a wide range of drilling machines, including CNC systems and high-speed drilling stations.
Reduced Tool Wear: Advanced geometries and materials reduce the frequency of tool replacements, lowering operational costs.
High-Speed Performance: Capable of operating at high speeds without compromising precision or tool integrity.
Minimized Drill Breakage: Robust construction significantly reduces the risk of breakage, even under intense operational conditions.
Optimal Chip Evacuation: Efficient chip evacuation maintains clean cutting areas, improving the overall drilling process and outcome.
Precision Cooling: Optimized coolant paths ensure effective heat dissipation, crucial for maintaining the longevity and performance of both the drill and the workpiece.
Low Maintenance: Designed for easy maintenance and cleaning, which is essential for maintaining performance in high-throughput environments.

About Carbide Micro Drills

SMART CUT® Carbide Micro Drills, precision-engineered for optimal performance in demanding drilling applications. Produced from high-grade carbide, renowned for its exceptional hardness and resistance to wear. This ensures that SMART CUT® Carbide Micro Drills not only last longer but also perform consistently under rigorous conditions.

SMART CUT® Carbide Micro Drills are available in a variety of sizes, starting from micro-scale diameters, which are perfect for industries that require tight tolerances and superior finishes. These drills are especially useful in fields such as electronics, medical device manufacturing, and precision engineering, where minute and precise holes are crucial.

SMART CUT® Carbide Micro Drills are available with a variety of point geometries, each suited to different materials and drilling techniques. From standard twist drills to specialized tip geometries designed to minimize entry and exit burrs, each drill is a product of extensive research and development.

The drills can be customized to meet specific requirements, offering flexibility in length, diameter, and even specialized coatings. These coatings, which include options like Titanium Nitride and Diamond-like Carbon, further enhance the drill's performance by reducing friction and increasing efficiency when cutting through hard or abrasive materials.

SMART CUT® Carbide Micro Drills are compatible with a range of precision drilling machines, including CNC equipment and high-speed drilling stations. This versatility ensures that they can be integrated seamlessly into any production line, enhancing existing setups with minimal adjustment.

What are coatings?

Coatings are thin layers of materials applied to the surfaces of cutting tools, such as carbide micro drills, using techniques like Chemical Vapor Deposition (CVD) or Physical Vapor Deposition (PVD). These coatings, which are usually just a few microns thick, serve to enhance the performance, durability, and functionality of the tools.

Why use coatings?

One of the main advantages of applying coatings to carbide micro drills is the significant increase in hardness and wear resistance they provide. Coatings like Titanium Nitride (TiN), Titanium Carbonitride (TiCN), and Diamond-like Carbon (DLC) enhance the surface hardness of the drills, making them more resistant to wear and abrasion. This allows the tools to last longer, maintain their sharpness, and require less frequent replacement, thus reducing downtime and the costs associated with tool changes.

Additionally, some coatings such as Titanium Aluminum Nitride (TiAlN) can withstand high temperatures, which is crucial for high-speed drilling operations that generate significant heat. These coatings act as thermal barriers, protecting the carbide substrate from the heat that could lead to softening or structural failure, and allowing for faster drilling speeds and prolonged tool life.

Coatings also improve lubricity and reduce friction. For example, DLC coatings have low friction coefficients, which minimize the amount of heat generated due to friction and prevent material from sticking to the drill. This reduces galling and welding of the work material to the drill, leading to smoother operations, finer finishes, and more precise holes.

Furthermore, coatings like Chromium Nitride (CrN) and nickel-based options provide excellent resistance to oxidation and corrosion. This is particularly important when drilling materials that are corrosive or when working in corrosive environments, thereby extending tool life and maintaining performance integrity.

Improved cutting efficiency is another benefit of using coatings. By reducing the energy and force required for cutting, some coatings enable more efficient material removal. This leads to better overall machining performance, including higher speeds, lower power consumption, and reduced wear on both the tool and the machine.

Coatings Available – Table of Comparison

Coating Type	Hardness (HV)	Heat Resistance (°C)	Key Properties	Typical Applications	Materials Used On	Features of Coating
Diamond-like Carbon (DLC)	2000 - 5000	Up to 400	Low friction, high hardness	Precision tools, automotive parts	Steel, alloys, ceramics	Reduces adhesive wear, minimal friction, enhances durability
Titanium Nitride (TiN)	1800 - 2300	Up to 500	Reduces wear, thermal stability	General machining, cutting tools	Steel, titanium, aluminum	Increases surface hardness, extends tool life
Titanium Aluminum Nitride (TiAlN)	2800 - 3500	Up to 800	High hardness, thermal resistance	High-speed and high-temperature applications	High-alloy steels, titanium	Excellent for high-temperature applications, resists oxidation
Titanium Carbonitride (TiCN)	3000 - 4000	Up to 400	Higher toughness, abrasive wear resistance	Hard material cutting, milling tools	Steel, hard metals	Greater hardness than TiN, superior wear resistance
Chromium Nitride (CrN)	1600 - 2000	Up to 700	Corrosion resistance, hardness	Corrosive environments, food processing	Stainless steel, aluminum	Good toughness, excellent against corrosion and oxidation
Nickel-based Coatings	400 - 700	Variable	Corrosion and wear resistance	Marine, oil and gas, chemical processing	Copper, brass, marine metals	Enhances bonding, protects against harsh environments
Ceramic Coatings	2500 - 4500	Over 1000	Chemical stability, heat resistance	Aerospace, high-performance cutting	Composites, hard superalloys	High thermal barrier, reduces thermal stresses
CVD Diamond Coating	8000 - 10000	Up to 600	Extreme hardness, wear resistance	Abrasive material cutting, advanced machining	Graphite, ceramics, metals	Superior abrasion resistance, suitable for very hard materials

Recommended RPM’s for SMART CUT® Carbide Micro Drills

Recommended RMP’s based on material type, hardness, drill diameter, cutting speed (Vc), and chip load per tooth:

Material Type	Hardness	Drill Diameter (mm)	Cutting Speed (Vc) m/min	Chip Load Per Tooth (Microns)
Low Carbon Steel, Magnetic Soft Steel, Leaded Steels	≤ 120	Ø < 1.0	50	80
		Ø < 1.5	30	45
		Ø < 2.0	35	52
		Ø < 2.5	40	60
		Ø < 3.0	46	68
Plain Carbon Steel Low, Medium Carbon	< 250	Ø < 1.0	25	60
		Ø < 1.5	25	40
		Ø < 2.0	29	46
		Ø < 2.5	33	53
		Ø < 3.0	38	61
Structural Steel, Case Carburizing Steel	< 200	Ø < 1.0	25	60
		Ø < 1.5	25	40
		Ø < 2.0	29	46
		Ø < 2.5	33	53
		Ø < 3.0	38	61
Alloyed Steel, Medium Carbon, Tool Steel, Wrought	< 250	Ø < 1.0	20	50
		Ø < 1.5	12	35
		Ø < 2.0	14	40
		Ø < 2.5	16	46
		Ø < 3.0	18	53
Alloyed Steel, Hardened and Tempered Steel, Tool Steel	> 250 ≤ 350	Ø < 1.0	15	35
		Ø < 1.5	10	25
		Ø < 2.0	12	29
		Ø < 2.5	13	33
		Ø < 3.0	15	38
Stainless Steel (Ferritic + Austenitic, Ferritic, Martensitic)	< 300	Ø < 1.0	23	53
		Ø < 1.5	5	25
		Ø < 2.0	6	29
		Ø < 2.5	7	33
		Ø < 3.0	8	38
Nickel Alloys (Nickel, Unalloyed, Nickel Alloys Nimonic 75, Monel 400)	< 150	Ø < 1.0	15	40
		Ø < 1.5	10	15
		Ø < 2.0	12	17
		Ø < 2.5	13	20
		Ø < 3.0	15	23
Titanium (Titanium Alloy, Cast)	< 270	Ø < 1.0	25	56
		Ø < 1.5	7	25
		Ø < 2.0	8	29
		Ø < 2.5	9	33
		Ø < 3.0	11	38
Cast Iron (Soft Gray Cast, Ferritic)	< 150	Ø < 1.0	30	80
		Ø < 1.5	20	50
		Ø < 2.0	23	58
		Ø < 2.5	26	66
		Ø < 3.0	30	76
Aluminum (Al Alloys, Si>5%)	-	Ø < 1.0	200	350
		Ø < 1.5	150	300
		Ø < 2.0	100	200
		Ø < 2.5	45	60
		Ø < 3.0	52	69
Copper - Brass Alloys (Copper Alloys, Wrought)	-	Ø < 1.0	100	225
		Ø < 1.5	25	40
		Ø < 2.0	29	46
		Ø < 2.5	33	53
		Ø < 3.0	38	61