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Mikron Group
CrazyMill Cool

CrazyMill Cool

Product catalog summary

Overview of CrazyMill Cool Endmills

CrazyMill Cool is a carbide endmill series featuring integrated through-coolant channels designed to improve cooling efficiency and chip evacuation, especially for difficult-to-machine materials such as stainless steel, titanium, and superalloys.

Key Features

Integrated Coolant Channels: Coolant flows internally through the carbide shaft, exiting near cutting edges to reduce temperature and flush chips, enabling higher cutting speeds and better surface finish.
Solid Carbide Construction: Special carbide grade optimized for chip removal in tough materials.
Cutting Geometry: Robust diameter, radial relief, and edge preparation for stability and quality milling.
Coating: eXedur SL coating provides wear and heat resistance, preventing material build-up.
Robust Shaft: Carbide shaft ensures vibration-free milling with high precision.

Applications and Benefits

Ideal for machining stainless steels, acid-resistant steels, titanium alloys, chrome-cobalt alloys, and nickel-based superalloys. Benefits include:

Extended tool life due to reduced heat and chip interference.
Superior surface finish comparable to grinding.
High chip removal rates with deep cuts and high speeds, achieving 10-20x efficiency over standard tools.

Product Variants

Type A: Max machining depth 1.5 × tool diameter (d).
Type B: Max depth 3.0 × d.
Type C: Max depth 5.0 × d.

Diameter range: 0.3 mm to 6 mm (0.0118" to 0.236"), unique integrated through-cooling in this size range.

Technical Specifications

Detailed dimensions for Types A and B include tool diameter (d), shank diameter (D), flute length (l1), overall length (L), and corner radius (r). Various sizes are stocked with specific article numbers.

Recommended Cutting Data

Cutting parameters are provided for a broad range of materials: non-alloy steels, alloy steels, tool steels, stainless steels (ferritic, martensitic, austenitic), aluminum alloys, copper, brass, bronze, titanium, nickel alloys, and chrome-cobalt alloys.

Parameters include cutting speed (Vc) and feed per tooth (fz) tailored by tool diameter and material group.
Data assume machining with cutting oil at 70 bar coolant pressure; cutting speeds should be reduced if coolant pressure is lower.

Cooling and Lubrication Recommendations

Use cutting oil or emulsions with integrated through coolant channels.
No special filter needed due to large lubricant channels.
Recommended coolant pressure: minimum 15 bar for speeds below 10,000 rpm, 30 bar above 10,000 rpm.
Flow rates vary by tool diameter, from 0.05 l/min (0.3 mm tools) up to 12-18 l/min (6 mm tools).

Machining Techniques and Best Practices

Ramp angles for circular ramping vary by material group: steels (5°–15°), stainless steels (5°–10°), aluminum (10°–30°), titanium and Ni-Co superalloys (2°–8°).
Feed correction factors apply based on ramp angle, reducing feed speed as angle increases.
Recommended clamping: hydraulic expansion chucks, shrink-fit chucks, or high-precision collets for minimal runout and high surface quality, especially at high speeds.
Choose CrazyMill Cool type according to required machining depth.

Application Example

Machining stainless steel 904L (material no. 1.4539) with CrazyMill Cool Type B (3 mm diameter):

Cutting speed: ~200–220 m/min
Spindle speed: ~21,000–23,000 rpm
Depth of cut (ap): 3 mm
Width of cut (ae): 0.9–3 mm
Feed per tooth (fz): ~0.040–0.042 mm
Surface roughness (Ra): 0.056–0.08 µm

This demonstrates high-efficiency milling with excellent surface finish and chip evacuation.

General Recommendations and Limitations

Cutting data optimized for cutting oil and high coolant pressure; adjust parameters if conditions differ.
Tool diameters should be at least 1.3 times the minimum diameter for certain operations.
Tools feature cutting edges with 45° protection phase or corner radius to enhance tool life.
Applications span dental, machine building, jewelry, aerospace, conveyor technology, medical, food industry, watches, and petrochemistry sectors.

Additional Resources and Contact

A video demonstration is available on the Mikron Group YouTube channel showcasing CrazyMill Cool performance.

Contact information for Mikron Tool SA (Switzerland), Mikron GmbH (Germany), and Mikron Corp. (USA) is provided for sales, production, and technical support.

Summary: This document comprehensively details the CrazyMill Cool endmill series, covering tool specifications, machining parameters, cooling requirements, and best practices to achieve high performance and superior surface quality across a wide range of challenging materials.

Catalog excerpts

Crazy Mill Cool Cool milling to new horizons Through coolant, carbide Endmills

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CrazyMill Cool Revolutionary in the minute detail Integrated coolant channels Cooling channels are integrated into the carbide shaft. Coolant ports are at the end of the shaft taper where they produce a steady and massive cooling effect of the cutting edges which facilitates in turn high cutting speeds. A targeted ushing of the chips is thus also assured and gives best surface quality. Shaft A robust carbide shaft helps to achieve stable and non vibrating milling. Highest precision and surface quality are achieved. Solid carbide A special carbide has been developed for the CrazyMill Cool product...

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CrazyMill Cool Always top performing A small Endmill lives up to highest expectations - cooled. Machining of difficult materials With difficult materials such as stainless and acid resistant steels, titanium chrome-cobalt alloys as well as superalloys, milling tools are exposed to considerable wear. With high temperatures and reduced heat conductivity of the material, the heat transfers usually to the cutting edges, which subsequently reduces much of the tool life expectancy. External cooling is often not enough to control sufficiently the temperature of the tool. The integrated through coolant...

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CrazyMill Cool Type A Article available from stock

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Material group Non-alloy steels Alloy steels Stainless steel - ferritic Stainless steel -martensitic 2.1020 Bronze high-strength, Ampco Titanium pure P High alloy steels, tool steels M Stainless steel -austenitic Aluminum alloy wrought Aluminum alloy cast Copper Brass, Bronze < 200 HB Titanium alloys Nickel alloys Cr -Co alloys Material group Non-alloy steels Alloy steels 2.1020 Bronze high-strength, Ampco Titanium pure P High alloy steels, tool steels Stainless steel - ferritic Stainless steel -martensitic M Stainless steel -austenitic Aluminum alloy wrought Aluminum alloy cast Titanium alloys...

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CrazyMill Cool Type B 3,0 x d D Article available from stock

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Material group Non-alloy steels Alloy steels Stainless steel - ferritic Stainless steel -martensitic 2.1020 Bronze high-strength, Ampco Titanium pure P High alloy steels, tool steels M Stainless steel -austenitic Aluminum alloy wrought Aluminum alloy cast Copper Brass, Bronze < 200 HB Titanium alloys Nickel alloys *1 Cr -Co alloys *1 WMaterial group Non-alloy steels Alloy steels 2.1020 Bronze high-strength, Ampco Titanium pure P High alloy steels, tool steels Stainless steel - ferritic Stainless steel -martensitic M Stainless steel -austenitic Aluminum alloy wrought Aluminum alloy cast Titanium...

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CrazyMill Cool Type C 5xd D Article available from stock

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CrazyMill Cool Technical information Clamping equipment Cooling lubricant / lter • Hydraulic expansion chuck: For a “smooth” cut with a minimal run out (T.I.R.) and very high surface quality. Direct clamping for shank diameter 4, 6 and 8 mm. Clamping with intermediate sleeve for shank diameter 3 mm. For optimum results Mikron Tool recommends the use of cutting oil as a coolant. Alternatively emulsion can also be used. No specic lter is necessary. Large lubricant channels enable to use standard lter. Pressure and quantity • Shrink-t chucks: Guarantee minimal run out (T.I.R.) with secure frictiontype...

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CrazyMill Cool New horizons in machining Application example Material: 904L; X1NiCrMoCu 25-20-5; 1.4539 Tool: CrazyMill Cool Type B; diameter 3 mm High efciency milling of a slot (1), a pocket (2) and a rib (3). Machine building Conveyor Technique Food industry Chip removal rate Q [cm /min] Through coolant Endmill Cutting edges with protection phase of 45°. Ideal for stainless steel, titanium and nickel based steels. Machining of non ferrous materials and all carbon steels in general is also possible. Possible machining direction Cutting edges with a corner radius For perfect surface quality...

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Your contacts Headquarter and Production: Mikron Tool SA Agno PO Box 340 6934 Bioggio Switzerland Phone +41 91 610 40 00 Fax +41 91 610 40 10 [email protected] Production for Germany and Regrinding for EU: Mikron GmbH Rottweil Abteilung Werkzeuge Berner Feld 71 78628 Rottweil Germany Phone +49 741 5380 450 Fax +49 741 5380 480 [email protected] North and South America Sales Mikron Corp. Monroe P.O. Box 268 200 Main Street Monroe, CT 06468 USA Phone +1 203 261 3100 Fax +1 203 268 4752 [email protected] www.youtube.com/mikrongroup www.mikron.com/tool Information and technical data are liable to changes...

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