FEATURE ON TOOLING

Hexalobe is a star for the medical industry

With star-shaped hexalobular bone screws (TORX) proving the design of choice in the medical industry, Floyd Automatic Tooling is introducing the UK market to CrazyDrill Hexalobe drills and CrazyMill Hexalobe end mills from Mikron Tool.

Medical screws for orthopaedic procedures are predominantly manufactured from titanium, stainless steel and cobalt-chrome. Machining these precision screws to impeccable surface finishes is a challenging task – that was until the arrival of the Mikron Hexalobe series. According to Floyd Automatic, machining hexalobe screws 50% faster with precision burr-free results is what makes this next-generation series the first choice for manufacturers in the medical sector.

These high-performance drills for generating pre-holes in TORX sockets are available in two variants: the pre-hole CrazyDrill Hexalobe TORX drill with a tip angle of 140°, and the CrazyDrill Hexalobe Flat drill with a tip angle of 180°. Both are available from 0.9 to 3.8 mm in diameter for producing T4 to T30 TORX sockets. Upon request, Floyd Automatic can provide the drills as a customised combination drill for streamlining operations. The CrazyDrill Hexalobe series combines two operations into one, as it simultaneously machines a flat pre-hole and a 120° chamfer.

The Mikron CrazyDrill Hexalobe from Floyd Automatic generates chamfer surface quality to a finish of Ra<0.3 µm while guaranteeing high profile accuracy and perpendicularity.

Completing the process is the CrazyMill Hexalobe micro end mill. Available from 0.2 to 1 mm diameter for T4 to T30 socket variants, the CrazyMill Hexalobe presents three- or four-flute variants with milling depths of 3.5xD and 5xD. The CrazyMill Hexalobe milling cutter demonstrates sufficient stiffness for machining with high feeds and stepover rates, while guaranteeing the necessary hex lobular profile accuracy.

More information www.floydautomatic.co.uk

Powering up productivity for EV manufacturer

As a machine tool builder that manufactures high-end four and five-axis machines for the global market, Heller UK has frequent involvement in turnkey projects for prestigious OEMs. On one of its more recent projects, the Redditch-based company enlisted the support of the cutting tool experts at Guhring.

There has been a wide spectrum of tools used on this project for a leading manufacturer of electric vehicles (EVs), including Guhring tool holders and tool vending technology. As part of the package of tool holders to accompany the cutting tools, the EV manufacturer has selected a vast range of standard heat-shrink, hydraulic and synchro-tapping chucks.

The cutting tools for the project included a huge range of standard products from Guhring’s portfolio of drills, taps and reamers. Although these accounted for a significant element of the system integration project, it was the bespoke PCD combination tools that demonstrated Guhring UK’s expertise as a one-stop solution provider and valued partner for turnkey projects.

With the PCD combination tools manufactured at Guhring UK’s Birmingham manufacturing facility and its main manufacturing plant in Germany, the bespoke tooling solutions were developed to achieve ‘one shot’ plunging. The bespoke tooling aimed to reduce cycle times and adhere to the high surface finishes required over the life of the tool.

“We delivered 22 four- and five-axis machines in this project, all built in the UK,” says Tad Forys, area sales manager at Heller Machine Tools UK. “Guhring has been with us for every step of the journey, clocking in tools and optimising speeds and feeds to make sure we have the most efficient process for the customer before delivery of the machines.”

More information www.guhring.co.uk

Mapal gains foothold at Kramer+Grebe

To stay competitive in mould and die making for the automotive industry, efficient production with a high degree of process reliability is vital for Krämer+Grebe of Biedenkopf-Wallau. Manufacturers such as Krämer+Grebe also judge cutting tool suppliers by their applications engineering. Mapal is earning trust in this respect with its reamers and high-feed milling cutters.

Machinery at Krämer+Grebe is all state of the art. The 16 machining centres are predominantly from DMG and Hermle. There is also a deep-hole drilling machine, two turning centre, three EDM machines and 3D printers. The company has 11,000 m²

of production space at its disposal, where the transition to electric mobility is well underway. Powertrain parts here include stator housings for the electric motor.

Co-operation between Mapal and Krämer+Grebe is reaching its five-year anniversary, a partnership which began with multi-bladed reamers. Mapal was the only manufacturer Krämer+Grebe could find that was able to produce these tools with the necessary quality and short lead times. Bores with H7 quality are needed to insert heating cartridges in low-pressure moulds.

Mapal’s application engineers left a lasting impression. They provided user training on site and helped commission the process on the machine. As part of process optimisation, Krämer+Grebe parted company with some of its former tool suppliers, of which there were many.

After such a good experience with the reamers, Krämer+Grebe began adopting Mapal’s high-feed milling cutters. The tools demonstrate long tool life and generate large chip volumes during roughing, thus reducing production times. The milling cutters are also extremely reliable to allow for multi-machine operation.

More information www.mapal.com

Raft of innovations on show from Horn

Paul Horn, the solid-carbide tooling, carbide insert and tool-holder manufacturer has supplied more than 200,000 special tooling solutions over the years and currently offers 25,000 standard products, including five that were introduced to the UK market at the recent MACH 2024 exhibition in Birmingham, UK.

For instance, an addition to the Horn Supermini boring, grooving and chamfering system was announced, namely a variant with a precision-ground rake face for producing ultra-fine bores. The ground cutting edge is free from notches at a magnification of x200 and the tool is suitable for machining components with an inside diameter from just 0.3 mm. Sharp insert geometry ensures process reliability, even with very small infeed and cutting feed rates. The special coating is suitable for stainless steels, non-ferrous metals and other metals.

Notably, the Supermini Type 105 system insert requires only one tool holder for well over 1000 insert variants, which applies equally to left-hand and right-hand versions. Carbide inserts are available coated or uncoated in various grades for a variety of applications, including hard machining up to 66 HRc. The patented, droplet-shape cross section has a vibration-damping effect and delivers high repeatability during insert exchange. Internal coolant supply to the insert increases tool life, enhances cutting performance and improves chip removal. Horn offers the tools with face clamping elements that allow easy changing of the insert without removing the holder from the machine.

Horn has also developed a new solid-carbide milling cutter range for machining stainless steels used widely in the watchmaking and other precision engineering industries. Due to their geometry and efficient chip breaking, the mills are also suitable for machining numerous other materials.

More information www.phorn.co.uk

Get smart with large-diameter boring

Precision hole-making system manufacturer Big Kaiser is launching its new bridge tool that comes complete with a smart damper holder. Available in the UK from cutting tool manufacturer Industrial Tooling Corporation (ITC), the product marks the advent of a new family of bridge tools.

The Big Kaiser bridge tool with smart damper features the CK connection for both rough and fine-boring operations. Notably, the new bridge tools incorporate the company’s patented smart damper that reduces vibration when machining large-diameter bores up to 320 mm.

Giampaolo Roccatello, chief sales and marketing officer for Europe at Big Kaiser, says: “Now, we can seamlessly merge multiple cutting-edge technologies. This system brings together the exceptional modularity of the CK connection, with the anti-chatter capabilities of our smart damper and our bridge tools. With the introduction of this new product family, we’re continuing to push the boundaries of innovation in solutions for large-diameter deep boring.”

The integrated smart damper enhances connection stability, leading to improved precision during boring operations. It creates a stiff system in comparison with using separate or modular components. Additionally, the tools offer the convenience of supporting coolant supply through a central hole. This design delivers cutting fluid directly to the cutting edge to prolong tool life and improve performance whilst simplifying the installation process.

Expected to serve a broad spectrum of industry sectors, the Big Kaiser bridge tools will prove valuable assets in applications within the energy, defence, aerospace and large-part manufacturing sectors.

More information www.itc-ltd.co.uk