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End Mills Add Vibration Damping Features

Iscar has added to the built-in asymmetry of its EC-H Chatterfree solid carbide end mills to increase speed and process security in slotting and shoulder milling of ferrous metals.

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Iscar has added to the built-in asymmetry of its EC-H Chatterfree solid carbide end mills to increase speed and process security in slotting and shoulder milling of ferrous metals. The end mills feature both variable-pitch flutes and varying helixes for vibration damping. Two flutes have a 35-degree helix angle, and the other two ascend at 37 degrees.
 
According to the company, the more asymmetry designed into a solid carbide tool, the greater its resistance to harmonic vibration and chatter. The variable helix is said to add an extra damping influence against harmonic vibrations, a principal cause of tool fracture in hard, but brittle, solid carbide end mills. It also minimizes chatter marks in the workpiece.
 
In addition, the EC-H Chatterfree end mills feature a free-cutting-edge geometry designed to improve chip evacuation and reduce cutting forces, making them well-suited for low-power machines with ISO 40 or BT40 adaptations, the company says. They can be safely used on slots as large as 2.5 × D in alloy and stainless steel.
 
The end mills are available in diameters ranging from 6 to 25 mm, with either Weldon (relieved) or cylindrical (straight) shanks. All have corner radii and are mode of IC900, a versatile PVD-coated grade. Three length and shank-type combinations are available: standard lengths with cylindrical shanks, standard lengths with relieved shanks, and extra-long 4 × D mills with cylindrical shanks. 

 

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