AMXT inserts with a choice of seven substrate grades and three chip-breaker geometries have been developed by Sumitomo Electric Hardmetal to meet specific demands where lower powered machines or less stable application conditions are encountered. Each insert has a high rake featuring a curved wave form to the cutting edge. With greater insert width, this design creates a more stable seating to support the cutting action.

The seven grades: ACP100, 200 and 300; ACK200 and 300; and ACM 200 and 300, can cut to depths of up to 5 mm. ACP100 has the latest Sumitomo ‘FF’ CVD coating, giving wear and thermal resistance in the high-speed and light cutting of steel. Sumitomo’s ACP200 uses the company’s ‘Super ZX’ PVD coating on a carbide substrate, which is said to enable milling 1.5 times faster than conventional inserts. ACP300 also has Super ZX coating and is designed for use under more arduous roughing applications.
ACK200 grade with its ‘Super FF’ CVD coating is for use in general machining tasks (including interrupted cuts) involving grey and ductile cast irons. ACK300, which is coated with Super ZX, provides a solution able to generate even greater levels of productivity.
Sumitomo’s ACM200 is coated with Super FF to provide high orders of wear resistance when machining PH stainless steels, while ACM300 is first choice (with its Super ZX coating) when balanced wear and fracture resistance is required.
The AXMT inserts can be paired with Sumitomo’s new WEX Type 1000 cutter bodies for 90º shoulder-milling applications. In fact, pocketing, helical boring, slotting, shoulder milling and ramping cycles can be carried out with the same tool, says the company.
For further information www.sumitomotool.com

The AH8000 insert series, which has been developed as part of the TungTurn line from Tungaloy, is said to demonstrate high performance levels when machining heat-resistant alloys. Extended tool life is credited to the composition of the grade, which incorporates newly developed substrates, a multi-layered nano AlTiN coating with a high Al content and Tungaloy’s proprietary PremiumTec surface technology.

Tungaloy says that these characteristics result in an insert grade that is at least 20% harder than alternate grades. In addition, the bonding of the substrate prevents notch wear and further extends performance parameters when machining heat-resistant alloys. Under test conditions on a variety of Inconel, titanium and other aerospace alloys, Tungaloy reports that the AH8000 more than quadrupled tool life while reducing machining times.
Included in the AH8000 series is the AH8005 grade for continuous machining at higher spindle speeds, and the AH8015 grade, which is said to be extremely hard and durable for interrupted cutting applications. As well as the two grade options, Tungaloy has developed its HRM chip-breaker for finish to medium cutting, and the HRF breaker for finish-turning operations. Adding to these negative insert chip breakers, Tungaloy has also launched a positive insert line with PSF, PSS and PS chip breakers.
The AH8000 series includes a 35, 55 and 80° rhombic insert, a square, triangular and trigon insert (90, 60 and 80°), and a round insert range.
For further information www.tungaloy.com/uk