Sandvik Coromant is upgrading its range of tools for steel tapping operations with two updates to its solid round tools range. The company says that its next-generation CoroTap T200 and T300 spiral tapping tools for ISO P materials deliver improved process security, longer tool life and a reduced cost per component.

CoroTap T200 and T300 are suitable for ISO P1 and P2 steel workpiece materials, and can therefore help improve the machining of parts such as crankshafts, steering knuckles and general engineering components like housings and flanges.

The CoroTap T200 has a spiral point, with the T300 featuring a spiral flute. While the spiral point of the T200 is suited to the machining of through holes – where chips are pushed forward – the T300 caters for blind holes, where there is no exit hole and chips must be pulled backwards. As part of the upgrade, both tools have a new surface treatment, as well as improved edge rounding for better finishing inside the machined hole. An enhanced flute form also aids better overall performance.

As a result of these upgrades, Sandvik Coromant reports that manufacturers will benefit from improved process security with an increased resistance to edge chipping, leading to fewer tool breakages and enhanced thread quality. In addition, the cutting-speed capability is higher than with previous versions of the tool, subsequently leading to an overall reduction in the cost per part.

Another major difference compared with previous versions of the CoroTap range is that customers can benefit from Sandvik Coromant’s ‘Tailor Made’ web assortment. This service gives customers the freedom to specify their own dimensions, without paying for a specialist tool.

For further information
www.sandvik.coromant.com

Vargus UK has introduced the new ST-Cut line of cutting tools for small part machining. Developed specifically for the turning of small components on Swiss-type sliding-head turning machines, the ST-Cut line presents a solution for virtually every small part turning application.

The ST-Cut series features a novel insert replacement system that provides fast and easy changeovers of tips from both sides of the tool. This capability is particularly suitable for manufacturers running sliding-head turning centres where space is often limited inside the working envelope.

Furthermore, the clamping system demonstrates high repeatability and rigidity for manufacturers aiming to part-off a maximum diameter of 17 mm.

The ST-Cut series incorporates both left- and right-hand inserts with a cutting width from 0.5 to 2 mm, with a range of cutting depths, geometries and insert grades. Similarly, the square grooving/turn and round grooving line offers left- and right-hand variants with insert widths from 0.5 to 3 mm, while the round groove inserts provide a choice of radii from 0.2, 0.5, 0.75, 1, 1.25 and 1.5 mm. From a threading perspective, the left and right-hand inserts are available with a 55° and 60° profile option, offering a maximum insert width of up to 3.2 mm.

ST-Cut inserts are available in two grades, including the AlTiN PVD coated VPG grade for achieving medium to high cutting speeds on alloy steel, stainless and titanium alloys. The uncoated VS020 sub-micro grade is suitable for medium to low cutting speeds. This grade is uncoated to ensure a sharper cutting edge that is crucial for very small components where accuracy is paramount.

For further information
www.vargusuk.co.uk

Guhring has expanded its hole-making and threading range with the arrival of the MTMH3-Z. An expansion of the Drifter series of thread mills, the new MTMH3-Z Drifter helical-drilling thread mill demonstrates high performance levels when processing materials up to 66 HRc.

Combining core drilling and threading in a single operation, the MTMH3-Z Drifter helical-drilling thread mill offers process reliability when wet- or dry-cutting all material types. With two oil grooves on the shaft to provide optimum cooling with cutting fluid or air, the range also has a left-hand cutting geometry that stabilises performance during climb milling. A fine-grained carbide composition characterised by its high hardness complements this geometry and makes the tool suitable for hard machining.

Guhring’s temperature-resistant TiSiN coating prolongs tool life and performance. Furthermore, the MTMH3-Z Drifter incorporates a special face geometry with hollow grinding that makes process-safe core-hole drilling and thread milling possible in almost all material types.

With a shank diameter from 3 to 12 mm and a neck relief from 5 to 40 mm, the new thread milling series is suitable for creating threads from M2 to M16 on a material range that includes all steels and stainless steel, cast and graphite iron, aluminium, and titanium alloys. Suitable for drilling and threading holes up to 2.5xD in a single operation, the MTMH3-Z Drifter can reduce set-ups, cycle times, tool inventory and costs.

CNC Guhro thread-mill software enables users to specify the thread data by selecting from all current thread standards and then inputting the material requiring machining. At this stage, the software provides the optimal parameters.

For further information
www.guhring.co.uk

The Ceratizit Fullmax universal solid-carbide reamer is now available in a short version. Offering even greater stability, the Fullmax short variant allows for higher cutting speeds, with the added advantage of long service life and a lower price.

With its reduced length, the Fullmax solid-carbide reamer offers numerous advantages. Firstly, the tool is very stable and characterised by low vibration, resulting in up to 10% higher cutting speeds in the main application areas of steel and cast iron. Secondly, feed rates can increase by 10-20%.

This combination delivers machining times up to 20% faster.

In addition, there are better reaming results in terms of surface finish and dimensional accuracy, reports Ceratizit.

Like the universal standard Fullmax reamers, the short versions are characterised by their specialised coating and cutting edge pitch, which help to reduce chatter marks and improve chip formation. In detail, the unequal division, with cutting edges facing each other in pairs, leads to reduced deviations in circularity and cylinder shapes. The increased angle differences reduce the tendency for the tool to oscillate and form chatter marks.

Thanks to the flute-shape opening angle adapted to the new pitch, there is sufficient space for optimised chip removal, even on long-chipping materials. The targeted coolant supply provides further assistance. Although the Fullmax short-version reamer is suitable for deployment on all CNC milling and turning centres, its reduced dimensions make it particularly attractive for use on sliding-head lathes.

The short series Fullmax is available from stock in H7 tolerance and 1/100 mm increments. Dimensions are individually configurable in the diameter range from 2.96 to 20.05 mm.

For further information
www.ceratizit.com

Walter has expanded its D4120 drilling line to introduce 2xD, 3xD, 4xD and 5xD dimensions, therefore superseding the B4000 Series Xtra.tec insert drills.

Regarded as a flexible all-rounder, the extended D4120 indexable insert solid drill line is available in a range of diameters that span from 13.5 to 59 mm. The product expansion now incorporates the D4120-02 2xD and D4120-03 3xD drills for creating holes from 13.5 to 41.3 mm diameter, as well as the D4120-04 and D4120-05 4xD and 5xD drills for holes from 17 to 59 mm diameter.

The drills feature outer and centre inserts that ensure precision balancing of the cutting forces to maximise productivity. To this end, the centre insert is slightly larger than the outer indexable inserts, which are equipped with a corner protection chamfer. As well as providing greater process reliability, this design plays a crucial part in increasing precision levels, stability and reducing drilling noise. Adding to process reliability is a hardened and polished drill body design that offers increased protection against friction in operation, and an improved coolant channel design that allows the flow of 25% more coolant than previous drills.

Walter is also now offering inserts with a wiper edge for high-quality surface finishes. The drill body features two through coolant channels and a measuring collar for easy drill identification, even when assembled. Polished flutes and a hardened surface further optimise chip evacuation and wear resistance.

The combination of the D4120 drill body and the four-edged indexable inserts offers users cost-efficiency advantages and high levels of flexibility thanks to a co-ordinated system.

For further information
www.walter-tools.com