Maximum Cooling for Maximum Cutting Efficiency with Cool Flash

Overheated cutting edges cause chip welding, tool chipping and ultimately decreased tool life. To compensate, operators frequently reduce spindle speeds or increase their consumption of cutting tools. Both options prove inefficient, as machining takes longer and the expense of constantly replacing dull tools can add up quickly. A better answer is to apply a coolant to the tool at the cutting edge, reducing the temperature and providing better performance.

Keeping It Cool
One popular coolant delivery method is through flexible hoses within the CNC enclosure. External nozzles, at first glance, appear to provide sufficient volume. However, they are often easily moved out of position and lack sufficient pressure to get coolant to the tool at higher RPMs. Another method is to buy cutting tools with holes for coolant built into them, but these are more expensive than standard tools and the holes can cause the metal to become brittle.

To overcome these problems, HAIMER designed the Cool Jet system with a unique design in the nose of the toolholder to evenly deliver coolant directly to the flute and edge of the tool. This aims the coolant directly where it is needed. The Cool Jet works with shrink fit chucks, Power ER collets, Weldon, Whistle-Notch and HG-Chucks.

Volume Vs. Velocity
Tools rotating at high RPM create their own miniature vortex that forms an air barrier around the spinning tip. Coolant aimed directly at the end of the tool runs right into this vortex, causing atomization that drastically reduces the volume of coolant actually reaching the cutting edge. The resulting heat buildup can cause chips to weld to the tool, leading to tool breakage and work piece damage.

Cool Flash
The HAIMER Cool Flash system, based on the existing Cool Jet system for shrink fit holders, was designed to guarantee optimized cooling right up to the cutting edge, even at the highest RPM. Instead of round holes at the bottom of the tool holder, it features a series of small T-slots situated 360° around a cap welded to the end of the tool holder. Coolant is diverted into channels that lead to each slot and exits at increased pressure, like when you put your thumb over the end of the garden hose. This concept works with centrifugal force to lead the coolant along the shank of the cutter and directly to the flutes at any speed. This method not only minimizes the temperature of the cutting edge but also eliminates welded balls of chips on the cutting tool, even with deep slotting applications. The result is optimized runout accuracy and extended tool life up to 100%!

In addition to these benefits, the new HAIMER Cool Flash system is easy to use. Additional sleeves or separate holders that might cause unbalance are unnecessary, offering a decisive advantage over systems that entail greater effort while offering less optimal cooling. You can also shrink and unshrink HAIMER Shrink Fit Chucks as usual while using the Cool Flash option— no additional steps are required. Furthermore, stability, rigidity and interference contour of the original HAIMER holder remain unchanged.

True to the slogan “make good things even better,” HAIMER developed the Cool Flash system to give you enhanced operational results. The acquisition cost is low, especially when compared to the time and expense of constantly changing tools due to clogged and damaged cutting edges. The Cool Flash system is available from shank diameter 6 mm up to 32 mm.