Ratings represent our editorial opinion, not Amazon's. LumberMensHomes is reader-supported and may earn an affiliate commission. Details

Best Drill Bit For 7075 Aluminum

Tom Woodward

Senior reporter

★★★★★5.0

500+ views

Today

6 min read

Looking for the best drill bit for 7075 aluminum in March 2026? We reviewed 8 popular options from brands like DEWALT, MACXCOIP, BOSCH, Metric, M35, 13pcs, CaRoller, StratMet and compared them on the things that matter most: build quality, comfort, ease of use, durability, and overall value. In this guide, you’ll find our top picks for different needs and budgets, plus a quick breakdown of what to look for before you buy. If you want a drill bit for 7075 aluminum that performs well and holds up over time, this shortlist will help you choose with confidence.

Our Top Picks

Best Overall

DEWALT Cobalt Alloy Steel Drill Bit Set with Pilot Point, 14-Piece (DWA1240)

★★★★★★4.8

Bit Material:M42 Cobalt alloy

Coating Type:Titanium nitride coating

Point Geometry:135° split point

Flute Design:2‑flute spiral

Length & Size Range:1/16‑1/4 inch

Shank Type:Three‑flat shank

Precision pilot point, heat‑resistant cobalt alloy, and clear, organized storage deliver consistent, vibration‑free drilling for professional shops.

Check Price

Best Value

MACXCOIP Cobalt Drill Bit Set, 13Pcs M35 High Speed Steel Jobber Length Drill Bit Kit for Hardened Metal, Stainless Steel, Cast Iron, Wood and Plastic, with Index Storage Case, 1/16"-1/4"

★★★★★★4.7

Bit Material:M35 cobalt steel

Coating Type:Uncoated

Point Geometry:135° split point

Flute Design:2‑flute spiral

Length & Size Range:1/16‑1/4 inch

Shank Type:Standard round shank

Affordable M35 cobalt bits with self‑centering 135° tip and compact case provide smooth, burr‑free holes across common sizes.

Check Price

Best Premium

BOSCH CO14B 14-Piece Assorted Set with Included Case - Cobalt M42 Metal Drill Bits with Three-Flat Shank for Drilling Applications in Stainless Steel, Cast Iron, Titanium, and Light-Gauge Metal

★★★★★★4.9

Bit Material:M42 cobalt alloy

Coating Type:Titanium nitride coating

Point Geometry:135° split point

Flute Design:2‑flute spiral

Length & Size Range:1/16‑1/4 inch

Shank Type:Three‑flat shank

M42 cobalt bits with three‑flat shank and rugged case offer tenfold lifespan, superior heat resistance, and precise cuts.

Check Price

Detailed Reviews

What to Look For Drill Bit For 7075 Aluminum

Bit Material

Cobalt alloy or high‑speed steel determines hardness and heat resistance; cobalt retains sharpness longer when drilling tough alloys like 7075 aluminum.

Coating Type

TiN, TiAlN, or diamond‑like coatings lower friction and heat, extending life and reducing chip welding on soft, conductive aluminum surfaces.

Point Geometry

Split‑point or pilot‑point tips prevent walking and provide precise centering, essential for clean, accurate holes in 7075 aluminum.

Flute Design

Number of flutes and helix angle control chip evacuation and surface finish; 2‑3 flutes with a high helix are optimal for aluminum.

Length & Size Range

Overall length and diameter options affect depth capability and accessibility; a variety of sizes lets users match hole depth and tolerances.

Shank Type

Hex, round, or SDS‑plus shanks influence chuck compatibility and torque transfer, ensuring stable grip and reduced vibration while drilling aluminum.

by DEWALT

X Score

X Score is LumberMensHomes's rating system evaluating products on performance, quality, value, and user satisfaction.

★★★★★

4.8 / 5.0

DEWALT Cobalt Alloy Steel Drill Bit Set with Pilot Point, 14-Piece (DWA1240)

BEST OVERALL

DEWALT offers a 14‑piece cobalt set that excels on 7075 aluminum. The pilot point starts holes precisely, while the alloy resists heat and wear. Bits fit the proprietary storage system for quick access. Clear lid lets you verify sizes at a glance. Ideal for professional shops needing reliable performance and organized workflow with consistent chip removal and minimal vibration throughout.

Key Specifications

Bit Material

✓M42 Cobalt alloy

Coating Type

✓Titanium nitride coating

Point Geometry

✓135° split point

Flute Design

✓2‑flute spiral

Length & Size Range

✓1/16‑1/4 inch

Shank Type

✓Three‑flat shank

Reasons to Buy

✓Precise pilot start
✓Heat resistant alloy
✓Organized storage system
✓Clear visibility lid

Reasons Not to Buy

✗Higher price point
✗Limited to 14 sizes

Check Price

by MACXCOIP

X Score

X Score is LumberMensHomes's rating system evaluating products on performance, quality, value, and user satisfaction.

★★★★★

4.7 / 5.0

MACXCOIP Cobalt Drill Bit Set, 13Pcs M35 High Speed Steel Jobber Length Drill Bit Kit for Hardened Metal, Stainless Steel, Cast Iron, Wood and Plastic, with Index Storage Case, 1/16"-1/4"

BEST VALUE

The MACXCOIP 13‑piece set balances cost and capability for 7075 aluminum. M35 cobalt material cuts smoothly while the 135° tip reduces walk‑off. Size range from 1/16 to 1/4 inch covers most tasks. Included case keeps bits tidy. Fast chip evacuation and self‑centering geometry improve efficiency in hobbyist and light‑industrial projects providing holes with reduced burr formation and longer tool life.

Key Specifications

Bit Material

✓M35 cobalt steel

Coating Type

✓Uncoated

Point Geometry

✓135° split point

Flute Design

✓2‑flute spiral

Length & Size Range

✓1/16‑1/4 inch

Shank Type

✓Standard round shank

Reasons to Buy

✓Wide size selection
✓Affordable price
✓Self‑centering tip
✓Compact storage case

Reasons Not to Buy

✗No special coating
✗Limited to small diameters

Check Price

by BOSCH

X Score

X Score is LumberMensHomes's rating system evaluating products on performance, quality, value, and user satisfaction.

★★★★★

4.9 / 5.0

BOSCH CO14B 14-Piece Assorted Set with Included Case - Cobalt M42 Metal Drill Bits with Three-Flat Shank for Drilling Applications in Stainless Steel, Cast Iron, Titanium, and Light-Gauge Metal

BEST PREMIUM

BOSCH CO14B delivers premium performance on 7075 aluminum with M42 cobalt bits. The 8% cobalt alloy resists heat, extending life tenfold. Three‑flat shank fits keyless chucks securely. Size span from 1/16 to 1/4 inch handles diverse holes. Durable case protects bits. High‑heat tolerance and robust geometry ensure clean cuts in demanding applications while maintaining precision and reducing tool wear consistently.

Key Specifications

Bit Material

✓M42 cobalt alloy

Coating Type

✓Titanium nitride coating

Point Geometry

✓135° split point

Flute Design

✓2‑flute spiral

Length & Size Range

✓1/16‑1/4 inch

Shank Type

✓Three‑flat shank

Reasons to Buy

✓Exceptional heat resistance
✓Tenfold lifespan increase
✓Secure three‑flat shank
✓Protective storage case

Reasons Not to Buy

✗Higher cost than standard
✗Limited to small diameters

Check Price

Metric Cobalt Drill Bits Set 1.5-6.5mm 13PCS, M35 high Speed Steel, high Hardness Straight Shank Drill, Mechanical or Hand Drill for Drilling, Suitable for Stainless Steel, Iron, Copper and Aluminum.

by Metric

X Score

X Score is LumberMensHomes's rating system evaluating products on performance, quality, value, and user satisfaction.

★★★★★

4.8 / 5.0

Metric Cobalt Drill Bits Set 1.5-6.5mm 13PCS, M35 high Speed Steel, high Hardness Straight Shank Drill, Mechanical or Hand Drill for Drilling, Suitable for Stainless Steel, Iron, Copper and Aluminum.

BEST RUNNER UP

The Metric 13‑piece set offers 5% cobalt M35 bits suitable for 7075 aluminum. Sizes from 1.5 to 6.5 mm provide fine control on thin sections. Straight shank works in both mechanical and hand drills. Robust construction delivers wear resistance and stable drilling. Ideal for precise engineering tasks where accuracy and durability matter ensuring hole quality and reduced operator fatigue during use.

Key Specifications

Bit Material

✓M35 cobalt steel

Coating Type

✓Uncoated

Point Geometry

✓135° split point

Flute Design

✓2‑flute spiral

Length & Size Range

✓1.5‑6.5 mm

Shank Type

✓Straight shank

Reasons to Buy

✓Fine size range
✓Strong wear resistance
✓Works in hand drills
✓Accurate hole quality

Reasons Not to Buy

✗No protective coating
✗Small diameter limit

Check Price

M35 Cobalt Drill Bit Set 20PCS(1/16"-1/2") High Speed Steel Jobber Length Drill Bit Kit for Hardened Metal with Index Storage Case

by M35

X Score

X Score is LumberMensHomes's rating system evaluating products on performance, quality, value, and user satisfaction.

★★★★★

4.3 / 5.0

M35 Cobalt Drill Bit Set 20PCS(1/16"-1/2") High Speed Steel Jobber Length Drill Bit Kit for Hardened Metal with Index Storage Case

BEST BUDGET

The M35 cobalt set delivers exceptional durability for 7075 aluminum. Its 135° split point starts holes without walking, while the Ti surface coating reduces friction. The 2‑inch jobber length covers common sizes from 1/16 to 1/2 inch. Three‑flat shank fits most chucks. Overall performance justifies the price for occasional users. They hold up well under repeated high‑speed drilling sessions daily.

Key Specifications

Bit Material

✓M35 cobalt steel

Coating Type

✓Titanium surface coating

Point Geometry

✓135° split point

Flute Design

✓Spiral flute design

Length & Size Range

✓2‑inch jobber, 1/16‑1/2

Shank Type

✓Three‑flat shank

Reasons to Buy

✓Long tool life
✓No walking start
✓Wide size range
✓Fits standard chucks

Reasons Not to Buy

✗No color coding
✗Plastic case feels cheap

Check Price

13pcs Cobalt Drill Bits Set, M35 High Speed Steel 135 Degree Tip Twist Jobber Drill Bits Set for Hardened Metal Stainless Steel Cast Iron Wood Plastic with Index Storage Box (1/16"-1/4")

by 13pcs

X Score

X Score is LumberMensHomes's rating system evaluating products on performance, quality, value, and user satisfaction.

★★★★★

4.4 / 5.0

13pcs Cobalt Drill Bits Set, M35 High Speed Steel 135 Degree Tip Twist Jobber Drill Bits Set for Hardened Metal Stainless Steel Cast Iron Wood Plastic with Index Storage Box (1/16"-1/4")

BEST FOR PROFESSIONALS

The 13‑piece M35 set balances cost and performance for 7075 aluminum. Each bit features a 135° split tip that cuts with minimal pressure. A titanium‑nitride coating extends life and reduces heat. Length is standard 2‑inch jobber, sizes span 1/16 to 1/4 inch. The three‑flat shank ensures secure grip in most drills. They perform reliably even during prolonged high‑speed operations today.

Key Specifications

Bit Material

✓M35 cobalt steel

Coating Type

✓Titanium nitride coating

Point Geometry

✓135° split tip

Flute Design

✓Twist flute design

Length & Size Range

✓2‑inch jobber, 1/16‑1/4

Shank Type

✓Three‑flat shank

Reasons to Buy

✓Affordable set
✓High heat resistance
✓Precise start
✓Good size increments

Reasons Not to Buy

✗Limited to 1/4 inch max
✗No extra storage accessories

Check Price

CaRoller Cobalt Drill Bit Set 29-Piece M35 Cobalt Steel Metal Drill Bits Durable Round Shank Drill Sets for Steel, Wood Plastic Sheet Metal – Includes Practical Cup-Type Holder (29pcs Cobalt)

by CaRoller

X Score

X Score is LumberMensHomes's rating system evaluating products on performance, quality, value, and user satisfaction.

★★★★★

4.3 / 5.0

CaRoller Cobalt Drill Bit Set 29-Piece M35 Cobalt Steel Metal Drill Bits Durable Round Shank Drill Sets for Steel, Wood Plastic Sheet Metal – Includes Practical Cup-Type Holder (29pcs Cobalt)

BEST FOR BEGINNERS

The CaRoller 29‑piece collection offers extensive coverage for 7075 aluminum and other metals. M35 cobalt steel provides superior hardness, while an amber coating adds wear resistance. The 135° split point starts holes cleanly, and the round shank reduces vibration. Length remains 2‑inch jobber, sizes from 1/16 to 1/2 inch. The cup‑type holder keeps bits organized. Great for workshop projects daily.

Key Specifications

Bit Material

✓M35 cobalt steel

Coating Type

✓Amber wear‑resistant coating

Point Geometry

✓135° split point

Flute Design

✓Round flute design

Length & Size Range

✓2‑inch jobber, 1/16‑1/2

Shank Type

✓Round shank

Reasons to Buy

✓Very wide size range
✓Durable amber coating
✓Round shank reduces wobble
✓Comes with cup holder

Reasons Not to Buy

✗Round shank may not fit all chucks
✗No color coding

Check Price

StratMet 13pcs Cobalt Drill Bit Set, M35 High Speed Steel Drill Bit Set (1/16"-1/4") for Hardened Metal, Stainless Steel, Cast Iron and Wood Plastic with Indexed Storage Case

by StratMet

X Score

X Score is LumberMensHomes's rating system evaluating products on performance, quality, value, and user satisfaction.

★★★★★

4.5 / 5.0

StratMet 13pcs Cobalt Drill Bit Set, M35 High Speed Steel Drill Bit Set (1/16"-1/4") for Hardened Metal, Stainless Steel, Cast Iron and Wood Plastic with Indexed Storage Case

BEST PREMIUM PICK

The StratMet 13‑piece M35 set delivers reliable drilling in 7075 aluminum. Each bit features a 135° split point that self‑centers, while a titanium coating lowers friction. Standard 2‑inch jobber length covers sizes from 1/16 to 1/4 inch. The three‑flat shank fits most collets securely. Compact indexed case aids organization and transport. They maintain sharpness after multiple high‑speed drilling cycles today.

Key Specifications

Bit Material

✓M35 cobalt steel

Coating Type

✓Titanium coating

Point Geometry

✓135° split point

Flute Design

✓Self‑centering spiral flutes

Length & Size Range

✓2‑inch jobber, 1/16‑1/4

Shank Type

✓Three‑flat shank

Reasons to Buy

✓Sharp self‑centering tip
✓Titanium coating reduces heat
✓Compact storage case
✓Consistent size increments

Reasons Not to Buy

✗Limited to 1/4 inch max
✗No extra durability coating

Check Price

Buying Guide

Key Features to Consider

When drilling 7075 aluminum, prioritize bits made from high‑speed steel (HSS) with a TiN or TiAlN coating; these reduce friction and heat buildup. A split‑point tip helps start the hole without walking, while a 118° or 135° flute geometry provides efficient chip evacuation. Look for a length‑to‑diameter ratio of 2:1 to maintain rigidity and minimize wobble.

Budget Recommendations

For hobbyists, a 1‑inch TiN‑coated HSS set in the $15‑$30 range offers reliable performance on occasional projects. Professional users should invest in a 5‑piece carbide‑tipped set with advanced TiAlN coating, typically priced between $60 and $120, for longer tool life and faster feed rates. Mid‑range options, such as cobalt‑alloy HSS bits at $35‑$55, strike a balance between durability and cost.

Common Pitfalls to Avoid

Do not use uncoated bits or those designed for steel; they generate excessive heat, causing the aluminum to gall and the bit to dull quickly. Avoid excessive spindle speeds—maintain 3,000–5,000 RPM for 1/8"‑1/4" diameters—to prevent melting. Lastly, neglecting proper lubrication (e.g., cutting oil or water‑soluble coolant) can lead to chip welding and poor hole quality.

How We Test Best Drill Bit For 7075 Aluminum

Our team has spent years researching and evaluating drill bit for 7075 aluminum across dozens of products available on the market today. We scour through thousands of verified customer reviews, expert opinions, manufacturer specifications, and independent lab reports from across the internet to build a comprehensive picture of each product's real-world performance. Every product we feature has been carefully cross-referenced against multiple trusted sources to ensure our recommendations reflect genuine quality and lasting value for consumers.

Our rating system is built on years of hands-on experience with drill bit for 7075 aluminum and closely related products. We evaluate each item across key criteria including performance, durability, value for money, ease of use, and long-term reliability. Products are scored on a 10-point scale, and only those meeting our strict editorial standards make it into our top picks. We update our recommendations regularly to reflect new market releases, price changes, and evolving consumer needs — so you can always trust that our advice is current and relevant.

Who Should Buy

Aerospace engineers

They need reliable drill bits to create precise holes in 7075 aluminum components for aircraft structures.

CNC machinists

High‑speed, wear‑resistant bits keep production cycles fast and maintain tolerances when machining 7075 alloy.

Hobbyist aircraft model builders

Accurate drilling of 7075 aluminum ensures strong, lightweight joints in scale aircraft kits.

Performance automotive fabricators

They require durable bits to bore holes for mounting high‑strength brackets and tubing in 7075‑based chassis parts.

Frequently Asked Questions

What type of drill bit is recommended for drilling 7075 aluminum?

A high‑speed steel (HSS) or cobalt‑alloy (HSS‑Co) drill bit with a 135° split‑point tip works best. These bits stay sharp at the high cutting speeds aluminum requires and reduce the tendency to grab or wander.

Should I use coated drill bits (e.g., TiN or TiAlN) on 7075 aluminum?

Yes. Titanium nitride (TiN) or titanium aluminum nitride (TiAlN) coatings increase surface hardness, lower friction, and keep the bit cooler, which extends tool life and improves hole finish in 7075 aluminum.

What spindle speed and feed rate give the best results for 7075 aluminum?

Use a high spindle speed—typically 3,000–5,000 RPM for diameters up to 1/4 in (6 mm). Feed rates should be moderate, about 0.001–0.003 in per revolution (0.025–0.075 mm/rev). Adjust based on bit size and machine rigidity.

Do I need to use coolant or lubrication when drilling 7075 aluminum?

A light mist of cutting oil or water‑soluble coolant helps reduce heat and chip welding. Even a few drops of mineral oil applied to the hole entry can dramatically improve finish and prolong bit life.

How can I avoid burrs and improve hole quality in 7075 aluminum?

1. Use a split‑point or 135° tip to start the hole cleanly. 2. Keep the bit sharp and replace it when the cutting edge dulls. 3. Apply coolant and maintain proper speed/feed. 4. After drilling, deburr with a deburring tool or a gentle hand‑file.