Cobalt Drill Bit Set (6 PCS) - Multi-Purpose HSS Co Thread Tap & Countersink Bit Set with 1/4 Inch Quick Change Hex Shank for Metal Drilling

Name: Cobalt Drill Bit Set (6 PCS) - Multi-Purpose HSS Co Thread Tap & Countersink Bit Set with 1/4 Inch Quick Change Hex Shank for Metal Drilling
Brand: wyx01
SKU: NC02732607283998-6PCS锯齿钻3+4+5+6+6.5+8mm
Price: 29.99 USD
Availability: InStock

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QTY - 1 Set (6 pcs)

1 Set (6 pcs) 2 Set (12 pcs) 3 Set (18 pcs) 5 Set (30 pcs)

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Cobalt Drill Bit Set (6 PCS) - Multi-Purpose HSS Co Thread Tap & Countersink Bit Set with 1/4 Inch Quick Change Hex Shank for Metal Drilling

$29.99

SAVE Sold out

Industrial Grade Tooling

Cobalt Drill Bit Set (6 PCS)

M35 Cobalt High-Speed Steel All-in-One Combination Drill & Tap Bits. Engineered for ultra-fast drilling, precise thread tapping, and smooth countersinking on hard metals.

⚡

Cobalt HSS-Co

Heat & Wear Resistant

🌀

Spiral Flute

Rapid Chip Clearance

🔩

1/4" Hex Shank

Anti-Slip Quick Change

🎯

3-in-1 Action

Drill, Tap & Deburr

M35 Cobalt Alloy Construction

Infused with 5% Cobalt high-speed steel to significantly boost thermal resistance and surface hardness. Maintains a razor-sharp cutting edge even when drilling through high-temperature, tough materials.

Superior heat endurance prevents bit burnout
Up to 5X longer service life compared to standard HSS
Effortlessly cuts through stainless steel & hard metal plates

3-in-1 Time-Saving Efficiency

Combines hole drilling, thread tapping, and edge deburring/countersinking into a single pass. Eliminates tool changes and drastically increases job site productivity.

Completes drilling, tapping, and deburring simultaneously
135° Split point prevents "wandering" or skidding on contact
Creates clean, precise, burr-free threaded holes

1/4" Universal Quick-Change Hex Shank

Engineered with a standard 1/4-inch hex shank that locks securely into hand drills, impact drivers, and bench presses, eliminating bit slipping under heavy torque.

Compatible with power drivers and tap chucks
Deep spiral flutes evacuate metal shavings instantly
Prevents jamming and heat buildup during deep holes

Why Choose Our Cobalt Set?

Feature	Our 6-PCS Cobalt Set	Standard HSS Bits
Material Grade	M35 Cobalt High-Speed Steel	Carbon Steel / Standard HSS
Heat Resistance	Extreme (Up to 600°C+)	Low (Dulls easily at high temp)
Work Efficiency	✓ 3-in-1 (Drill + Tap + Deburr)	✗ Single Function Only
Stainless Steel Ready	✓ Yes (Smooth Cutting)	✗ No (Prone to snap/dull)
Shank Stability	1/4" Hex Shank (Anti-Slip)	Round Shank (Slips easily)

Multi-Material Compatibility

Stainless Steel

Ideal for 304/316 sheet metal & pipes

Iron & Carbon Steel

Heavy-duty drilling & thread tapping

Aluminum & Copper

Fast, smooth cuts without chip clogging

Wood & Hard Plastics

Clean, splinter-free precision holes

6-Piece Size Specifications

Size	Thread Diameter	Pitch	Drill Length	Shank Size
M3	3.0 mm	0.5 mm	54 mm	1/4" Hex
M4	4.0 mm	0.7 mm	54 mm	1/4" Hex
M5	5.0 mm	0.8 mm	57 mm	1/4" Hex
M6	6.0 mm	1.0 mm	57 mm	1/4" Hex
M8	6.5 mm	1.25 mm	58 mm	1/4" Hex
M10	8 mm	1.5 mm	58 mm	1/4" Hex

💡 Pro Tips for Maximum Tool Life:

Controlled RPM: Use low speeds (200-500 RPM) when drilling hard metals like stainless steel.
Use Lubricant: Apply cutting oil or coolant during drilling to extend bit sharp life.
Keep Vertical Alignment: Maintain a 90-degree angle to ensure accurate thread tapping and prevent bit breakage.