Kennametal has unveiled a boring system that boasts the most effective anti-chatter mechanism ever developed by the company.

In addition, the system offers an extensive range of indexable heads and shank sizes. However, according to Sam Eichelberger, product engineer for lathe systems engineering and part of the team that developed the internal dampening mechanism, “perhaps the most important thing to know about the new bar is that it’s plug and play. There is no need whatsoever for tuning or adjustments – you simply pull it out of the package, mount it in the turret, and get boring.”
The system includes a serrated bolt-on connection at the bar’s business end that clamps a variety of styles and sizes of indexable heads. Better yet, the heads feature a shorter length and lighter weight that provides greater stability. They are also coolant-fed, to direct a stream of high-pressure coolant where it is needed most.
Most important of all is the internal dampener. Says Eichelberger: “The bars are both vibration- and maintenance-free. Within the bar there is a mass that’s supported by a pair of elastic supports, inside of which sits dampening fluid. This mass vibrates at a predetermined frequency during machining, attenuating the natural frequency of the bar around it to suppress vibration. There are no wear components to worry about.”
According to Kennametal, the vibration-free system offers superior performance in boring applications up to 10xD, much deeper than solid carbide or heavy metal boring bars can manage. Internal and customer test results show surface finishes as good, or in most cases better, than competitor systems, with significantly more aggressive cutting parameters possible across the board. The portfolio starts at 25 mm and goes to 100 mm.
For further information www.kennametal.com

NTK Cutting Tools is releasing its Stick Duo Splash cartridge insert line for the turning of small parts. Stick Duo Splash inserts direct high-pressure coolant at the cutting edge, helping to overcome the issues of poor swarf clearance when machining small parts that require internal turning and threading operations.

The Stick Duo Splash is available in two variants that offer either a single coolant outlet directed to the tip of the insert or, alternatively, a two-outlet holder which delivers cutting fluid to both the front and rear side of the tool insert. Stick Duo Splash inserts with two coolant outlets have been designed for evacuating chips during the processing of blind holes, while the single coolant outlet tool is suitable for the machining of through-holes and bores.
NTK’s Stick Duo Splash tool-holder cartridge has been developed for use with machine tools that have both standard and through-coolant delivery configurations. However, the flexibility of the Stick Duo Splash allows end users to attach the coolant hose to either a screw hole at the rear end of the cartridge, or via a connection point located at the front end. NTK has developed the Stick Duo Splash with two coolant inlet options to meet the various tooling configurations and set-ups of small turning centres and sliding-head machines with compact work envelopes.
Stick Duo Splash is available with a variety of cartridge dimensions that meet the specifications of all modern turning machines. Available diameters include 16, 19.05, 20, 22, 25 and 25.4 mm, with an overall length of 90, 110, 120 and 125 mm.
For further information www.ntkcuttingtools.co.uk

ElectroMill diamond and CBN electroplated grinding solutions from Engis are designed to replace expensive, complex, tungsten carbide or PCD milling cutters in the production of high-quality, flat milled surfaces in high-volume applications – even those with an interrupted cut or where multiple materials must be machined simultaneously.

Designed for use on a variety of machining centre types, in fact any system with high pressure coolant and 10,000+ rpm spindle, ElectroMill improves surface finish and flatness, while extending tool life and reducing cost per part, says the company.
ElectroMill solutions are offered either as an integral unit, providing increased rigidity and internal balance, or as a multi-part (shell) design, offering more flexible options and adaptability for legacy tool-holding situations. A number of standard taper options are also available.
The major benefits of the Engis ElectroMill include reduced numbers of operations, set-ups and inspections, along with high stock removal rates and low heat build-up (providing stress-free, cool cutting action). Engis says that ElectroMill extends tool life compared with conventional milling cutters because the diamond stays sharp with constant controlled micro-fracturing and no dressing cycles required. In addition, the ElectroMill solution is environmentally friendly, being usable with water-soluble or synthetic coolants.
The ElectroMill is aimed at sectors that include marine, automotive, aerospace and defence – and at a wide variety of components in ferrous, non-ferrous and exotic materials.
For further information www.engis.com