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ProductsSolid Carbide Spot Drill Bit for Aluminum - Mirror Finish & Uncoated 60° 90° 120° - CNC Tools
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Solid Carbide Spot Drill Bit for Aluminum - Mirror Finish & Uncoated 60° 90° 120° - CNC Tools

Prevent built-up edge with our Mirror Finish Solid Carbide Spot Drill Bits for Aluminum. Sharp cutting edges and polished flutes ensure smooth chip evacuation. Available in 60°, 90°, and 120°. Factory direct price. Get a free sample now!

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Product Function

The Solid Carbide Spot Drill Bit for Aluminum is specifically engineered to machine non-ferrous materials (Aluminum, Copper, Brass, Plastics). Unlike standard drills, this tool focuses on:
  • Preventing Built-Up Edge (BUE): Aluminum is "sticky." Our high-polish flute design prevents the material from welding to the cutter, which is the #1 cause of tool failure in aluminum.
  • High-Speed Centering: Designed to operate at high RPMs typical of aluminum machining, ensuring precise hole location accuracy.
  • Superior Surface Finish: The sharp, ground cutting edge leaves a burr-free, mirror-like finish on the chamfer or spotted hole.

Product Features

  • Material: Premium Ultra-Fine Micro Grain Carbide (K10/K20 grade), optimized for toughness to withstand high-speed shock.
  • Surface Treatment: Mirror Polished / Uncoated. (Optional DLC - Diamond-Like Carbon coating available upon request for extreme durability). Note: We do not use AlTiN coating on this model to avoid chemical affinity with aluminum.
  • Sharp Geometry: Features a sharper rake angle and larger chip gullets compared to steel drills, allowing for aggressive shearing of soft materials.
  • Versatility: Excellent for Aluminum (6061, 7075), Brass, Copper, Bronze, Gold, Silver, and Engineering Plastics (Acrylic, Nylon).
  • Wide Size Range: Micro-spotting from 0.3mm up to 12mm standard sizes.

Specifications

60° Aluminum Spot Drill Dimensions

Cutter Diameter (mm)
Angle
Length of Cut (L2)
Shank Diameter (h6)
Overall Length (L1)
1.0
60°
3
4
50
1.5
60°
4.5
4
50
2.0
60°
6
4
50
2.5
60°
7.5
4
50
3.0
60°
9
3
50
3.0
60°
9
4
50
4.0
60°
12
4
50
5.0
60°
15
5
50
6.0
60°
18
6
50
8.0
60°
24
8
60
10.0
60°
30
10
75
12.0
60°
36
12
75

90° Aluminum Spot Drill Dimensions

Cutter Diameter (mm)
Angle
Length of Cut (L2)
Shank Diameter (h6)
Overall Length (L1)
0.3
90°
0.9
4
50
0.4
90°
1.2
4
50
0.5
90°
1.5
4
50
0.6
90°
1.8
4
50
0.7
90°
2.1
4
50
0.8
90°
2.4
4
50
0.9
90°
2.7
4
50
1.0 - 2.9 (0.1 Incr.)
90°
3 x Dia
4
50
3.0
90°
9
3
50
3.0
90°
9
4
50
3.1 - 3.9 (0.1 Incr.)
90°
3 x Dia
4
50
4.0
90°
12
4
50
4.0 (Long)
90°
12
4
75 / 100
4.5
90°
13.5
6
50
5.0
90°
15
5
50 / 100
5.5
90°
16.5
6
50
6.0
90°
18
6
50 / 100
6.5
90°
19.5
8
60
7.0
90°
21
8
60
8.0
90°
24
8
60 / 100
10.0
90°
30
10
75 / 100
12.0
90°
36
12
75 / 100

120° Aluminum Spot Drill Dimensions

Cutter Diameter (mm)
Angle
Length of Cut (L2)
Shank Diameter (h6)
Overall Length (L1)
1.0
120°
3
4
50
1.5
120°
4.5
4
50
2.0
120°
6
4
50
2.5
120°
7.5
4
50
3.0
120°
9
3
50
4.0
120°
12
4
50
5.0
120°
15
5
50
6.0
120°
18
6
50
8.0
120°
24
8
60
10.0
120°
30
10
75
12.0
120°
36
12
75

RPM/Feed Reference (For Aluminum)

Material: Aluminum Alloys (6061, 7075) / Brass / Copper Note: Aluminum allows for much higher cutting speeds (Vc) than steel.
Diameter (mm)
Cutting Speed (Vc m/min)
RPM (rev/min)
Feed (f mm/rev)
3.0
120 - 250
12,000 - 20,000*
0.05 - 0.10
4.0
120 - 250
9,500 - 19,000*
0.08 - 0.15
6.0
150 - 300
8,000 - 15,000
0.10 - 0.20
8.0
150 - 300
6,000 - 11,000
0.15 - 0.25
10.0
150 - 300
4,800 - 9,500
0.20 - 0.35
12.0
150 - 300
4,000 - 8,000
0.25 - 0.40
*Max RPM depends on your machine spindle limit. For spotting, a short dwell time is recommended.

Promotion Policy

Boost your aluminum machining efficiency with our special offers:
  1. Free Sample: Test the "No-Stick" performance! Free sample provided (shipping cost paid by client).
  1. First Order Coupon: **
    50USDOFF∗∗fornewclientsonfirstorder>50 USD OFF** for new clients on first order >
    
    500 USD.
  1. Big Order Discount: Automatic 2%~5% discount applied for orders > $5000 USD.

Client Benefits

  • Eliminate Scrap: The mirror finish prevents chips from sticking to the tool, reducing the risk of snapping the drill or scarring the workpiece.
  • High Efficiency: Capable of running at high RPMs, significantly reducing cycle time compared to HSS or coated steel drills.
  • Burr-Free Results: The sharp cutting geometry ensures clean hole entry, often eliminating the need for a secondary deburring step.
  • Fast Delivery: Huge stock of metric and micro sizes ready to ship globally.

FAQ

Q1: Why is this drill uncoated (silver color)? A: Standard coatings like AlTiN (Aluminum Titanium Nitride) contain aluminum. When cutting aluminum, the material sticks to the coating (chemical affinity). Our Uncoated, Mirror-Polished carbide is the best standard solution to prevent this sticking.
Q2: Can I use this on Steel? A: It is not recommended. While the carbide is hard enough, the sharp edge geometry designed for soft aluminum may chip when hitting hard steel. For steel, please buy our AlTiN coated "Steel Series."
Q3: Do you offer DLC (Diamond-Like Carbon) coating? A: Yes! For high-volume production, we can upgrade this tool with DLC coating. DLC has an extremely low coefficient of friction and high hardness. Contact us for a custom quote.
Q4: What is the point angle tolerance? A: Our spot drills are ground to a tolerance of +/- 1°, ensuring consistent chamfer depths and accurate centering.