Products

DIAMOND VHM

Solid carbide end mills with Chemical Vapour Deposition (CVD) ’DIAMOND’ coating for machining abrasive materials like graphite. Diameter range from 3 mm up to 12 mm. DIAMOND product codes begin with JD and JM for MINI DIAMOND. Page 93. A complete range of ’Universal’ solid carbide end mills. Diameter range from 1 mm up to 32 mm. All VMH product codes begin with J. Page 107.The quality of a tool is dependent on the material, geometry and coating. The basic requirements for carbide and coating areexplained below.

Solid carbide:

The quality of a solid carbide tool is highly dependent on the quality of the cemented carbide. Jabro is in close cooperation with carbide suppliers to be able to guarantee the best possible carbide for the specific tool types. Carbide consists of Wolfram (WC) and Cobalt (Co). Carbide properties are mainly determined by the WC and Co ratio in combination with the WC grain size. Jabro determines the carbide used in new developments after research (together with the supplier) and by using results from laboratory and field tests.A homogenous structure is essential for carbide. Good quality carbide ensures longer tool life.

Coating:

A good coating is an important factor in the success of a carbide end mill.Jabro applies PVD and CVD coatings. The PVD coatings are: MEGA, MEGA-T, MEGA-64, TRIBON and HEMI. The CVD coatings are: DIAMOND and DURAThe coating protects the cutting edge of the tool against wear. During machining the temperature can reach 900°. Theinsulating properties of the coating protects the basic material. The hardness of the coating is higher than the hardness of thecarbide. Due to this the tool has higher resistance to wear with a longer tool life as a result. The coating also ensures reduced friction. Due to this, the wear develops less rapidly and the chip removal is optimized. DIAMOND coating is specially developed for machining graphite, a highly abrasive material. The very hard and homogeneous structure of the Dura coating makes the tool very resistant to the wear caused by machining composites.
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