qt-tools-carbide-cutting-tools-logo
ProductsSolid Carbide 3 Flute End Mill for Aluminum | U-Shape High Polished CNC Router Bit
solid-carbide-3-flute-end-mill-for-aluminum-u-shape
solid-carbide-3-flute-end-mill-for-aluminum-u-shape
solid-carbide-3-flute-end-mill-high-polished-detail
3-flute-end-mill-dimensions-drawing-schematic
3-Flute End Mills for Aluminum In-StockPopularRecommended

Solid Carbide 3 Flute End Mill for Aluminum | U-Shape High Polished CNC Router Bit

Boost your aluminum machining with our U-Shape 3 Flute Solid Carbide End Mills. Featuring a high-polished "U" design for superior chip evacuation and mirror finishes. Available in standard, long, and extra-long sizes (1mm-16mm). Factory direct pricing & free samples available!

Contact Us

Product Function

Designed specifically for non-ferrous materials, this 3 Flute Tungsten Carbide End Mill is the ultimate tool for high-speed machining of Aluminum Alloys (6061, 7075), Copper, Brass, and Plastics.
The unique geometry serves three main functions:
  1. High-Volume Slotting & Profiling: Capable of aggressive material removal rates (MRR) without clogging.
  1. Fine Finishing: The polished cutting edge produces a mirror-like surface finish on the workpiece, often eliminating the need for secondary polishing.
  1. Chip Management: The specialized U-Shape gullet ensures aluminum chips curl and evacuate immediately, preventing chip re-cutting and tool breakage.

Product Features

  • Material: Premium Micro-Grain Tungsten Carbide (HRC55) for exceptional wear resistance and tool life.
  • Geometry: U-Shape Design with a high helix angle (typically 45° or 55°). This deep valley design maximizes chip evacuation space.
  • Surface Treatment: High Polished / Bright Finish. We grind the flutes to a mirror finish to reduce friction and prevent "Built-Up Edge" (aluminum sticking to the tool).
  • Precision: Shank tolerance h6, ensuring tight run-out control for high-speed spindles (20,000+ RPM).
  • Versatility: Suitable for Side Milling, End Milling, Slotting, and Ramp Milling.

Specifications

Below is our standard stock list ranging from micro-diameters to heavy-duty sizes, including standard, long, and extra-long reach options.
Cutter Dia (mm)
Shank Dia (mm)
Length of Cut (mm)
OAL (mm)
Standard Length Series



1.0
4
1 / 2 / 3
50
1.5
4
2 / 3 / 4.5
50
2.0
4
2 / 3 / 4 / 6
50
2.5
4
3 / 4 / 5 / 7.5
50
3.0
3 / 4 / 6
3 / 4 / 6 / 9
50
4.0
4 / 6
4 / 6 / 8 / 12
50
5.0
5 / 6
15 / 20
50 / 60
6.0
6
6 / 8 / 10 / 12 / 18
50
6.0
6
20
60
6.5
8
19.5
60
7.0
8
21
60
7.5
8
22.5
60
8.0
8
8 / 10 / 12 / 14 / 24
50
10.0
10
10 / 12 / 14 / 16 / 18 / 20
60
10.0
10
30
75
11.0
12
33
75
12.0
12
12 / 14 / 16 / 18 / 20
60
12.0
12
36
75
Long & Extra Long Series



1.0
4
3
75 / 100
1.5
4
4.5
75 / 100
2.0
4
6
75 / 100
2.5
4
7.5
75 / 100
3.0
3 / 4
9
75 / 100
4.0
4
14 / 16
75
4.0
4
20 / 25 / 30
100
5.0
6
25
75
5.0
6
30
100
6.0
6
25 / 30
75
6.0
6
25 / 40
100
6.0
6
45
150
8.0
8
32
75
8.0
8
35 / 40
100
8.0
8
50
150
10.0
10
40
100
10.0
10
55
150
12.0
12
45
100
12.0
12
60
150
16.0
16
45
100
16.0
16
70
150
16.0
16
90
200

RPM/Feed Reference (General Aluminum Machining)

Note: These parameters are for reference. Adjust based on machine rigidity, cooling, and depth of cut.
Diameter (mm)
RPM (Speed)
Feed Rate (mm/min)
1.0 - 2.0
15,000 - 24,000
300 - 600
3.0 - 4.0
10,000 - 18,000
800 - 1500
5.0 - 6.0
8,000 - 12,000
1200 - 2500
8.0 - 10.0
6,000 - 10,000
2000 - 3500
12.0+
4,000 - 8,000
2500 - 4500

Promotion Policy

We value our partnership and offer exclusive incentives for new and loyal customers:
  1. Free Sample: Free sample can be provided, if clients agree to pay for shipping cost.
  1. First Order Coupon: New clients can enjoy USD50 discount coupon for first order, if the total order amount is more than USD500.
  1. Big Order Discount: Clients can enjoy 2%~5% discount, if the total order amount is more than USD5000.

Clients Benefits

Why choose our Tungsten Carbide Tools?
  • Factory Direct: No middleman. You get the best price-to-performance ratio in the market.
  • Consistency: Our CNC grinding machines (Anca/Walter) ensure every batch meets the same strict tolerance.
  • Inventory: We stock standard sizes (as listed above) for immediate shipment.
  • Customization: Need a non-standard length or specific coating (like DLC)? We offer OEM/ODM services with low MOQs.

FAQ

Q1: Is this end mill suitable for steel? A: No. This 3-flute U-shape design is optimized for Aluminum and Non-ferrous metals. For Steel, we recommend our 4-flute AlTiN coated series.
Q2: What is the advantage of the "U Shape"? A: The U-shape flute provides a larger space for chip evacuation. Aluminum chips are sticky and voluminous; the U-shape prevents chips from packing inside the flute, which causes tool breakage.
Q3: Do you offer DLC (Diamond-Like Carbon) coating? A: Yes! The standard version is Uncoated/Bright Finish (Polished), which is excellent for aluminum. However, for extended tool life in high-production environments, we can apply DLC coating upon request.
Q4: What is the shipping time? A: Stock items ship within 24-48 hours. Large orders or custom specs typically take 7-10 days.
Q5: Can I mix sizes to reach the $500 coupon threshold? A: Absolutely. You can mix any diameters or series (Standard/Long) to meet the promotion requirement.