M A T E R I A L S interchangeable and versatile. Machinists have the ability to keep the cutter (or tool holder) in place while easily switching the inserts with varying alternative grades more suited to machining different work-piece materials. Indexable cutting tools offer greater versatility in terms of performance than rotary tools, providing stable results even in adverse conditions and are able to perform multiple operations. For example, the operational versatility for milling inserts includes plunging, helical interpolation, profiling and enlarging a hole. Indexable cutting tools can also offer much larger diameter capability than round tools. Performance and versatility – rotary Although round tools generally involve a large initial investment compared to inserts, this investment can be spread over the long-term with the added possibility of regrinding. This is not an option with inserts. The geometry, substrate and coating of a round tool determine performance. Application specific tools have the potential to produce greater accuracy than general purpose tools. Also, the overall design allows the machine operator to achieve much smaller diameters. AusPress® Copper fittings and AS1432 tube in stock now! S&T Stainless now stocks a comprehensive range of AusPress® copper press fittings, AS1432 tube, and also offer one piece NZ3501 to Press Adapters. 26 February 2017 The four-facet split point geometry, for example, used on rotary drills, was originally developed for deep oil holes in automotive crankshafts. Today, it is used on many drill designs for a wide variety of hard and soft materials. It can be applied to a variety of drill point angles, the most common being 135 degrees. This highlights the evolution of round tools where key features, developed for specialist and unique applications have, in time, expanded for use in a wide number of applications and materials. A key benefit of the split point is easier and more precise self-centring and to prevent the tool from 'walking' before penetrating the work-piece. The web thinning or split point greatly reduces thrust and adds a positive rake cutting edge that extends to the centre of the drill. In many materials the point will also act as a chip breaker to produce small chips which can be ejected more efficiently through the flutes. This is a distinct advantage in most applications, but especially when portable drilling or in a drill press where bushings cannot be used. Each to their own Both round tools and indexable tools have their own distinct advantages based on material, operation and user requirements. Each one continues to see on-going developments and improvements, A Dormer milling cutter. including new geometries, coatings, substrates and manufacturing processes, such as edge preparations, surface finishing and other treatments. As cutting tools, they present a collective offer to end-users by providing an overlap in diameters and applications, so that tooling engineers can assess and advise where and when it is appropriate to apply each. One piece NZ 3501 to Press Adapters To find out more about our copper press fit range, please call: Ronel de Klerk, Business Development Manager, S&T Stainless, Auckland T 09 271 1790 | M 021 502 450 ENGMAR17 stainless.steelandtube.co.nz WaterMark & AS3688 Approved DN15 – DN50 Water Stocked DN65 – DN100 Ex Stock Adelaide Full range of Tools Available
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