Efficient Chip Evacuation and Anti Stick Rainbow U Type End Mill
Product Specifications
| Type | End Mill, Convex Mill, Face milling, 2 flute straight bit wood
router bits, Face Mill |
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| Material | Carbide |
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| Coating | TiB₂/DLC/ZrN |
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| Diameter | 1-20mm |
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| Overall length | 50-75mm or other |
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| Product name | AMG Rainbow U Type End Mill |
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| Transport | Air, TNT, DHL, EMS, Express |
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| OEM | OEM is Hot Welcome |
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Product Description
In aluminum alloy processing, cutting efficiency and surface
smoothness are critical factors. The AMG Rainbow U-Type End Mill
features an optimized U-shaped groove design and special colorful
coating, specifically engineered for high-speed precision machining
of aluminum alloys and high thermal conductivity lightweight
metals. This tool delivers superior smoothness, efficient chip
evacuation, and exceptional wear resistance.
Technical Specifications
| Model | Cutting Diameter (mm) | Flute Length (mm) | Shank Diameter (mm) | Overall Length (mm) | Number of Flutes | Coating | Material |
|---|
| AMG-AL-U060 | 6 | 15 | 6 | 50 | 2 | Rainbow Coating | Carbide |
| AMG-AL-U080 | 8 | 20 | 8 | 60 | 2 | Rainbow Coating | Carbide |
| AMG-AL-U100 | 10 | 25 | 10 | 75 | 2 | Rainbow Coating | Carbide |

Working Principle
The Rainbow U-Type End Mill features a large U-shaped deep groove
structure that efficiently evacuates chips from the cutting area,
preventing aluminum chip accumulation or recutting. The specialized
rainbow coating (such as TiB2) significantly reduces tool-material
adhesion, eliminating "tool sticking" while enhancing tool life and
surface finish quality.
Performance Advantages
- Superior chip evacuation: U-shaped groove design quickly removes aluminum chips without
accumulation or tool clogging
- Anti-stick properties: Rainbow coating's low friction coefficient prevents aluminum
adhesion
- Precision cutting: Specially designed blade geometry ensures smooth cutting with
minimal vibration
- Easy identification: Color-coded appearance simplifies tool management and selection

Frequently Asked Questions
Q: Why use specialized cutting tools for aluminum processing?
A: Aluminum's high toughness makes it prone to sticking on cutting
tools. Standard tools often cause chip accumulation and rough
surfaces, while specialized aluminum cutting tools effectively
solve these issues.
Q: How does rainbow coating differ from standard coatings?
A: Rainbow coatings like TiB2 feature lower friction coefficients
and superior anti-adhesion properties, specifically engineered for
high-speed aluminum alloy machining with improved heat dissipation.
Q: Can this tool be used for copper or other non-ferrous metals?
A: While compatible, optimal performance is achieved with aluminum
alloys including 6061, 7075, and 5052 series.