Kennametal digital boring system eBore
eBore Tool types from left to right: eBore Universal, eBore Fine Boring, eBore Bridge Tool. eBore Twin Cutter.

Digital-ready boring tools enable precision adjustment as easy as 1, 2, 3. Kennametal has introduced a new line of digital-ready fine boring tools that make precision adjustment easy, enabling more productive, predictable, and accurate boring. The eBore Fine Boring System consists of cutting units to cover a diameter range from 6 to 1020 mm (0.236 in. to 40.157 in.) and an optional digital display that makes precision adjustments as simple as turning a screw—and costly mistakes a thing of the past.

“For many workpieces, the boring operation is often the final step, and a simple mistake can lead to scrapped parts. The Kennametal eBore fine boring system does away with the traditional ‘count the graduations’ approach to boring and reduces costly mistakes,” said Global Product Manager Marcus Paul. “We’ve found there’s tremendous operator acceptance due to its simplicity and ease-of-use. And because the same eBore digital device can be used across multiple types of tools and on various machines, it’s easy on the tooling budget as well.”

Kennametal digital boring system eBore
Offering no-mistake adjustments and accuracy to within 2 microns, Kennametal´s eBore digital device is an optional—though extremely useful—part of the Kennametal Digital Boring System


With Kennametal’s digital eBore digital device, dialing in a tight bore and losing count of how far the adjustment screw was turned is a thing of the past. With an adjustment accuracy of 0.002 mm (0.00008 in.), the chip and coolant-resistant device contains a glass-scale that keeps track of boring bar movement. Simply snap it in place, turn the boring head’s adjustment screw by the desired amount, and the tool is ready for the next boring operation. With eBore, there is no need to remove the boring head from the spindle for adjustment nor to count graduations or take notes. Concerns over backlash and movement due to overtightening of the boring head’s locking screw are a thing of the past, as are endless test cuts and “sneaking up on the bore”. The result is less scrap, less downtime, and faster setups. The device shuts off automatically after 30 seconds and provides more than 5,000 adjustments between battery changes. And if you forget to remove the boring head before turning on the spindle, a ball and spring clamping mechanism releases the display automatically at 500 RPM, preventing potential injuries.

Boring Small and Very Large Diameters

The eBore product line consists of 4 types of tools, all of them feature through the tool coolant, covering the following diameter range:

  • eBore Universal Tool – 6-152 mm (0.236 in.-5.984 in.)
  • eBore Fine Boring Tool – 20-205 mm (0.787 in.-8.071 in.)
  • eBore Bridge Finishing Tool – 200-1020 mm (7.874 in.-40.157 in.)
  • eBore Twin Cutter Roughing Tool – 19.5-1020 mm (7.677 in.-40.157 in.)

Built on simplicity, the eBore system comes with Kennametal’s KM quick-change interface and can be easily adapted to HSK, PSC, KM4X, and steep taper spindles.

Kennametal digital boring system eBore
The newest member of the KenTIP FS family, the FEG insert eliminates the need for drilling and end milling flat bottom holes, instead completing the part in a single operation.

Flat Bottom Geometry for KenTIP FS New replaceable drill tip saves tooling costs and eliminates process steps Kennametal has expanded its replaceable drill offering for KenTIP FS modular drill series with the new FEG insert for flat bottom hole applications. Applicable in steel, cast iron, and stainless steels, the FEG insert eliminates end milling operations and completes a task in a single operation, saving time and tooling costs.

Drilling flat-bottom holes is a challenge. So is drilling on inclined or curved surfaces, drilling into cross holes, drilling stacked plates, and drilling into cross holes, stacked plates and castings and other rough surfaces. Not anymore. Leveraging the success of its KenTIP FS modular drill, Kennametal has developed a unique insert geometry (FEG) that streamlines many of these types of applications and simplifies the drilling of counterbores and pilot holes as well.

“The FEG insert is so versatile, you can use it for nearly all your drilling applications”, says Georg Roth, Kennametal’s Global Product Manager of Holemaking for Modular Drilling Tools.

Get to The Point

Conceptually, the FEG geometry design is simple. It features a 180° cutting edge, and a conical center point, which acts as a pilot to provide exceptional hole position and straightness. Corner chamfers serve to protect the cutting edges and reduce exits burrs. Four margin lands provide stability when breaking into interrupted cuts and cross-holes. And Kennametal’s KCP15A grade uses a nano-structured AlTiN coating and fine grain carbide substrate, providing both toughness and wear resistance when drilling steel, stainless steel, and cast iron.

The diameter range covers 6.0 – 26.0 mm (0.236 – 1.024 in.) and drilling depth of up to 12xD is possible depending on the KenTIP FS modular drill body.

About Kennametal

With over 80 years as an industrial technology leader, Kennametal Inc. delivers productivity to customers through materials science, tooling and wear-resistant solutions. Customers across aerospace, earthworks, energy, general engineering and transportation turn to Kennametal to help them manufacture with precision and efficiency. Every day approximately 10,000 employees are helping customers in more than 60 countries stay competitive. Kennametal generated nearly $2.4 billion in revenues in fiscal 2019.

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