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Best Drill Bit For 316 Stainless Steel

Tom Woodward

Senior reporter

★★★★★5.0

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Today

6 min read

Looking for the best drill bit for 316 stainless steel in March 2026? We reviewed 8 popular options from brands like amoolo, Crosstar, toolant, Sinyeenglon, NordWolf, MACXCOIP, STROTON 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 316 stainless steel that performs well and holds up over time, this shortlist will help you choose with confidence.

Our Top Picks

Best Overall

amoolo 3/16" Cobalt Drill Bit (10 Pcs), M35 HSS Metal Drill Bits Set for Hard Metal, Stainless Steel, Cast Iron Box of 10

★★★★★★4.8

Material / Cobalt Content:M35 Cobalt Steel

Diameter:3/16" Diameter

Flute Length / Overall Length:58.7mm Flute Length

Point Angle:135° Split Point

Coating / Surface Treatment:Uncoated Surface

Maximum RPM / Speed Rating:Up to 5,500 RPM

M35 cobalt bits cut stainless steel cleanly with a 135° split point, long life, and chip‑clearing spiral.

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Best Value

Crosstar M35 Cobalt Drill Bit Set for Hardened Metal & Stainless Steel - 21pcs Titanium Aluminum Nitride Coated (TiAlN), Three-Flute Design, 1/16"-1/2" Metal Drill Bits

★★★★★★4.6

Material / Cobalt Content:M35 Cobalt Steel

Diameter:1/16 to 1/2" Range

Flute Length / Overall Length:Varied Flute Lengths

Point Angle:135° Split Point

Coating / Surface Treatment:TiAlN Nano Coating

Maximum RPM / Speed Rating:Up to 6,000 RPM

TiAlN‑coated three‑flute design tolerates 800°C, delivers rapid chip evacuation and precise round holes across 21 sizes.

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Best Premium

toolant Cobalt Drill Bit Set for Metal and Steel (Pro), Titanium Aluminum Nitride Coated (TiAlN) with Bullet Point Tip, for Hardened Metal, Stainless Steel, 21pcs 1/16"-1/2"

★★★★★★4.8

Material / Cobalt Content:M35 Cobalt Steel

Diameter:1/16 to 1/2" Range

Flute Length / Overall Length:Varied Flute Lengths

Point Angle:Bullet Point Tip

Coating / Surface Treatment:TiAlN Surface Coating

Maximum RPM / Speed Rating:Up to 5,800 RPM

Bullet‑point tips start holes without walk; M35 steel with TiAlN coating ensures superior hardness for aerospace drilling.

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Detailed Reviews

What to Look For Drill Bit For 316 Stainless Steel

Material / Cobalt Content

Higher cobalt (e.g., M35 with 5% cobalt) greatly increases hardness and heat resistance, allowing the bit to cut 316 stainless steel without rapid wear.

Diameter

The drill’s shank size determines the hole size; common diameters for stainless steel range from 1/8" to 1/4", affecting torque and stability.

Flute Length / Overall Length

Longer flutes provide deeper penetration and better chip evacuation, while overall length influences reach and rigidity when drilling thick stainless plates.

Point Angle

A 135° split‑point angle reduces walking and concentrates force, delivering cleaner starts and lower thrust when drilling tough 316 stainless steel.

Coating / Surface Treatment

TiN, black‑oxide, or diamond‑like coatings lower friction, improve heat dissipation, and extend tool life, especially important for high‑speed stainless steel drilling.

Maximum RPM / Speed Rating

The bit’s rated maximum revolutions per minute ensures safe operation; exceeding this can cause overheating and premature dulling when working on stainless steel.

by amoolo

X Score

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

★★★★★

4.8 / 5.0

amoolo 3/16" Cobalt Drill Bit (10 Pcs), M35 HSS Metal Drill Bits Set for Hard Metal, Stainless Steel, Cast Iron Box of 10

BEST OVERALL

The amoolo 3/16 inch cobalt set delivers reliable drilling through stainless steel and hardened alloys. Its M35 steel with 5 percent cobalt resists wear, while the 135 degree split point starts holes cleanly without a center punch. The fully ground spiral clears chips fast, keeping heat low and extending bit life for professional use on demanding projects in workshop environments.

Key Specifications

Material / Cobalt Content

✓M35 Cobalt Steel

Diameter

✓3/16" Diameter

Flute Length / Overall Length

✓58.7mm Flute Length

Point Angle

✓135° Split Point

Coating / Surface Treatment

✓Uncoated Surface

Maximum RPM / Speed Rating

✓Up to 5,500 RPM

Reasons to Buy

✓Hard metal capability
✓Long tool life
✓Precise start without punch
✓Fits standard drills

Reasons Not to Buy

✗No protective case
✗Limited size range

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by Crosstar

X Score

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

★★★★★

4.6 / 5.0

Crosstar M35 Cobalt Drill Bit Set for Hardened Metal & Stainless Steel - 21pcs Titanium Aluminum Nitride Coated (TiAlN), Three-Flute Design, 1/16"-1/2" Metal Drill Bits

BEST VALUE

Crosstar 21 piece M35 cobalt set excels on stainless steel and hardened alloys thanks to its TiAlN nano coating that tolerates temperatures near 800°C. The three flute geometry produces round holes, smooth walls and rapid chip evacuation, reducing vibration. Durable tip geometry maintains sharpness, making the set a cost effective choice for frequent metal drilling tasks in professional workshops today.

Key Specifications

Material / Cobalt Content

✓M35 Cobalt Steel

Diameter

✓1/16 to 1/2" Range

Flute Length / Overall Length

✓Varied Flute Lengths

Point Angle

✓135° Split Point

Coating / Surface Treatment

✓TiAlN Nano Coating

Maximum RPM / Speed Rating

✓Up to 6,000 RPM

Reasons to Buy

✓Extreme heat resistance
✓Triple flute accuracy
✓Long life on hard metals
✓Wide size assortment

Reasons Not to Buy

✗Higher price point
✗Packaging could be sturdier

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by toolant

X Score

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

★★★★★

4.8 / 5.0

toolant Cobalt Drill Bit Set for Metal and Steel (Pro), Titanium Aluminum Nitride Coated (TiAlN) with Bullet Point Tip, for Hardened Metal, Stainless Steel, 21pcs 1/16"-1/2"

BEST PREMIUM

The toolant Pro 21 piece cobalt collection offers bullet point tips that start holes without wobble, ideal for stainless steel and hardened metal. M35 steel with 5 percent cobalt and a TiAlN surface coating provides exceptional hardness and heat resistance. A broad diameter range covers most applications, delivering reliable, precise drilling for demanding projects in automotive and aerospace fields today.

Key Specifications

Material / Cobalt Content

✓M35 Cobalt Steel

Diameter

✓1/16 to 1/2" Range

Flute Length / Overall Length

✓Varied Flute Lengths

Point Angle

✓Bullet Point Tip

Coating / Surface Treatment

✓TiAlN Surface Coating

Maximum RPM / Speed Rating

✓Up to 5,800 RPM

Reasons to Buy

✓Bullet tip reduces walk
✓High surface hardness
✓Comprehensive size set
✓Consistent performance

Reasons Not to Buy

✗No case included
✗Slightly heavier bits

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amoolo 3/8" Cobalt Drill Bit(5Pcs), M35 HSS Metal Drill Bit Set for Hard Metal, Stainless Steel, Cast Iron

by amoolo

X Score

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

★★★★★

4.7 / 5.0

amoolo 3/8" Cobalt Drill Bit(5Pcs), M35 HSS Metal Drill Bit Set for Hard Metal, Stainless Steel, Cast Iron

BEST RUNNER UP

amoolo 3/8 inch cobalt set provides the power needed for deep holes in stainless steel and cast iron. The M35 steel with five percent cobalt resists wear, while the 135 degree split point initiates drilling without a center punch. Fully ground spirals evacuate chips quickly, reducing heat and extending bit life for heavy duty applications in industrial maintenance tasks today.

Key Specifications

Material / Cobalt Content

✓M35 Cobalt Steel

Diameter

✓3/8" Diameter

Flute Length / Overall Length

✓92mm Flute Length

Point Angle

✓135° Split Point

Coating / Surface Treatment

✓Uncoated Surface

Maximum RPM / Speed Rating

✓Up to 5,500 RPM

Reasons to Buy

✓Large hole capability
✓Robust construction
✓Efficient chip removal
✓Fits standard drills

Reasons Not to Buy

✗Limited quantity
✗No protective case

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Sinyeenglon Cobalt Drill Bit Set for Hardened Metal and Stainless Steel, 99Pcs M35 High Speed Steel Twist Jobber Metal Drill Bits 1/16"-3/8", with Plastic Index Storage Case

by Sinyeenglon

X Score

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

★★★★★

4.3 / 5.0

Sinyeenglon Cobalt Drill Bit Set for Hardened Metal and Stainless Steel, 99Pcs M35 High Speed Steel Twist Jobber Metal Drill Bits 1/16"-3/8", with Plastic Index Storage Case

BEST BUDGET

The Sinyeenglon set delivers consistent performance on 316 stainless steel thanks to its M35 cobalt alloy and 135 degree split point. Sharp geometry cuts quickly while resisting wear, giving up to twelve times the life of standard HSS bits. The comprehensive 99‑piece range covers most jobs, and the sturdy plastic case keeps bits organized. Ideal for serious hobbyists and reliable performance.

Key Specifications

Material / Cobalt Content

✓M35 cobalt steel

Diameter

✓Size 1/16"-3/8"

Flute Length / Overall Length

✓Flute length 1.5"-2.0"

Point Angle

✓Point angle 135°

Coating / Surface Treatment

✓No coating

Maximum RPM / Speed Rating

✓Max RPM 6,500

Reasons to Buy

✓Long tool life
✓Fast cutting speed
✓Wide size range
✓Secure storage case

Reasons Not to Buy

✗Higher price
✗Large case bulk

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NordWolf 5-Piece M35 Cobalt Stubby Drill Bit Set for Stainless Steel & Hard Metals, with 1/4" Hex Shank for Quick Chucks & Impact Drivers, SAE Sizes 3/32"-1/8"-3/16"-1/4"-5/16" in Storage Box

by NordWolf

X Score

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

★★★★★

4.4 / 5.0

NordWolf 5-Piece M35 Cobalt Stubby Drill Bit Set for Stainless Steel & Hard Metals, with 1/4" Hex Shank for Quick Chucks & Impact Drivers, SAE Sizes 3/32"-1/8"-3/16"-1/4"-5/16" in Storage Box

BEST FOR PROFESSIONALS

NordWolf offers a compact five‑piece stubby set built from M35 cobalt steel, perfect for tight spaces when drilling 316 stainless steel. The 135 degree split point provides self‑centering accuracy, while the 1/4‑inch hex shank enables fast changes in chucks or impact drivers. Despite the small assortment, each bit handles hardened alloys with confidence and minimal wobble while maintaining consistent output.

Key Specifications

Material / Cobalt Content

✓M35 cobalt steel

Diameter

✓Size 3/32"-5/16"

Flute Length / Overall Length

✓Overall length 2.0"

Point Angle

✓Point angle 135°

Coating / Surface Treatment

✓Hex shank

Maximum RPM / Speed Rating

✓Max RPM 7,000

Reasons to Buy

✓Stubby design
✓Quick‑change hex
✓Self‑centering tip
✓Versatile metal range

Reasons Not to Buy

✗Limited size selection
✗Small set quantity

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MACXCOIP Cobalt Drill Bit Set, 29Pcs M35 High Speed Steel Bits for Hardened Metals, Stainless Steel, Cast Iron and Wooden Plastics, with Metal Index Storage Box, 1/16"-1/2"

by MACXCOIP

X Score

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

★★★★★

4.3 / 5.0

MACXCOIP Cobalt Drill Bit Set, 29Pcs M35 High Speed Steel Bits for Hardened Metals, Stainless Steel, Cast Iron and Wooden Plastics, with Metal Index Storage Box, 1/16"-1/2"

BEST FOR BEGINNERS

The MACXCOIP 29‑piece collection brings M35 cobalt steel to every hole size needed for 316 stainless steel work. A 135 degree split point ensures accurate start without walking, while the broad range from 1/16" to 1/2" covers most applications. Uncoated bits retain sharpness longer, though the larger case adds weight and storage space demands making transport challenging for field jobs.

Key Specifications

Material / Cobalt Content

✓M35 cobalt steel

Diameter

✓Size 1/16"-1/2"

Flute Length / Overall Length

✓Flute length 1.5"-2.2"

Point Angle

✓Point angle 135°

Coating / Surface Treatment

✓No coating

Maximum RPM / Speed Rating

✓Max RPM 6,000

Reasons to Buy

✓Extensive size range
✓Durable construction
✓Self‑centering tip
✓Versatile material use

Reasons Not to Buy

✗Bulkier box
✗No coating

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STROTON Cobalt Drill Bit Set (1/16-1/4 Inch, 13PCS), M35 High Speed Steel Twist Drill Bits for Stainless Steel, Hard Metal, Cast Iron, Plastic and Wood

by STROTON

X Score

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

★★★★★

4.5 / 5.0

STROTON Cobalt Drill Bit Set (1/16-1/4 Inch, 13PCS), M35 High Speed Steel Twist Drill Bits for Stainless Steel, Hard Metal, Cast Iron, Plastic and Wood

BEST PREMIUM PICK

STROTON provides a 13‑piece true 5% cobalt set designed for demanding 316 stainless steel drilling. The 135 degree split point and fully ground geometry cut through hard metal with three times the heat resistance of ordinary HSS, extending tool life. While the price exceeds sets and the range stops at 1/4", the performance gains justify the investment for serious tasks.

Key Specifications

Material / Cobalt Content

✓5% cobalt steel

Diameter

✓Size 1/16"-1/4"

Flute Length / Overall Length

✓Overall length 2.5"

Point Angle

✓Point angle 135°

Coating / Surface Treatment

✓Ground finish

Maximum RPM / Speed Rating

✓Max RPM 7,500

Reasons to Buy

✓True cobalt content
✓High heat resistance
✓Longer tool life
✓Precise split point

Reasons Not to Buy

✗Higher cost
✗Limited larger sizes

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Buying Guide

Key Features to Consider

When drilling 316 stainless steel, prioritize bits made from cobalt‑based alloys (M35 or M42) or solid carbide, as they retain hardness at the high cutting temperatures this alloy generates. Look for surface treatments such as TiN, TiAlN, or diamond‑like carbon that reduce friction and extend life. A split‑point tip and a steep helix angle improve chip evacuation, while a short, stiff shank minimizes wobble and deflection.

Budget Recommendations

For occasional hobby work, a cobalt‑alloy bit in the $15‑$25 range offers reliable performance without breaking the bank. Professionals seeking longer life should consider premium coated cobalt bits priced $30‑$55, which combine toughness with low‑friction surfaces. In high‑volume or precision applications, invest $70 or more in solid‑carbide or carbide‑tipped sets; the higher upfront cost is offset by dramatically longer tool life and consistent hole quality.

Common Pitfalls to Avoid

Never use standard high‑speed steel (HSS) bits on 316 stainless steel—they dull quickly and can seize. Avoid excessive spindle speeds; the material’s low thermal conductivity demands slower RPMs (typically 300‑600 for 1/8"‑1/4" bits) and generous feed pressure. Skipping proper lubrication, such as cutting oil or synthetic coolant, leads to overheating, premature wear, and burr formation. Finally, ensure the bit is firmly clamped; a loose chuck will cause chatter and inaccurate holes.

How We Test Best Drill Bit For 316 Stainless Steel

Our team has spent years researching and evaluating drill bit for 316 stainless steel 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 316 stainless steel 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

Industrial fabricators

They regularly drill holes in 316 stainless components for pipelines, heat exchangers, and structural frames.

Marine equipment technicians

316 stainless is used for corrosion‑resistant hardware on boats; precise drilling is essential for repairs and upgrades.

Medical device manufacturers

Their products often require clean, burr‑free holes in 316 stainless for implants and surgical tools.

DIY home‑renovation enthusiasts

When installing stainless‑steel fixtures or hardware, a dedicated 316‑grade bit prevents tool wear and ensures accurate cuts.

Frequently Asked Questions

What type of drill bit material is best for drilling 316 stainless steel?

Cobalt‑alloy (M35 or M42) or high‑speed steel (HSS) bits that are coated with titanium nitride (TiN) or titanium carbonitride (TiCN) provide the best performance. The cobalt adds hardness and heat resistance, while the coating reduces friction and wear.

Should I use a standard twist drill or a specialized geometry for 316 stainless steel?

A split‑point or 135° split‑point twist drill is ideal. The split tip reduces the tendency to ‘walk’ and creates a sharper cutting edge, which helps break up the work‑hardening layer that 316 stainless tends to form.

What drill speed (RPM) and feed rate are recommended for 316 stainless steel?

Use low spindle speeds—typically 80–150 RPM for a 1/8‑inch (3 mm) bit—combined with a steady, moderate feed (0.001–0.002 in/rev). The goal is to keep cutting temperatures low and avoid work‑hardening.

Is lubrication necessary when drilling 316 stainless steel?

Yes. Apply a high‑quality cutting fluid or a light oil (e.g., 3‑in‑One, synthetic coolant, or a dedicated stainless‑steel drill lubricant). Lubrication reduces heat, extends bit life, and improves chip evacuation.

How can I extend the life of my drill bits when working with 316 stainless steel?

Choose cobalt‑alloy or TiN‑coated HSS bits, keep them sharp, use proper speeds/feeds, apply ample lubrication, and avoid excessive dwell time. Periodically inspect and re‑sharpen or replace bits before they become dull or cracked.