Coated-carbide Flat MultiDrills range extended

Posted on 08 Sep 2018 and read 929 times
Coated-carbide Flat MultiDrills range extendedFollowing Sumitomo Electric Hardmetal’s ( application success with its range of Flat MultiDrill series (MDF) high-rigidity coated-carbide drills, the range has now been extended.

The drills are used for spot-facing and counter-boring features on horizontal, curved or inclined surfaces of a component that would normally put uneven and excessive side loading on the tool and machine spindle.

The MDF series now includes length-to-diameter ratios up to 10:1, a long shank, external coolant supply (L2D) and through-coolant feed (H3D/H5D) variants.

With its 180deg point angle, true flat-bottoming can be achieved, while pre-tapped holes can be produced in thinner plate or sheet material; and with high length-to-diameter ratios, these tools can be used to access component features that are deep — within housings, for example.

Significant to the high-rigidity MDF tool series is Sumitomo’s ‘RS’ thinning development, which creates a “greater wall thickness at the tip of the drill”.

Swarf evacuation is very effective, due to wider pockets (that accommodate chips) with high levels of flute finishing and a specific shape applied to the rake face.

A special high-strength cutting edge helps to resist impact damage when interrupted cutting is involved; this also maximises the overall stability of the tool.

Due to the design, minimal burr formation is a further benefit.

The extended line-up of MDF drills can be used on general steels, stainless steels, alloy steels and hardened steels up to 50 HRC; grey and ductile cast irons and aluminium can also be drilled.

Standard tools can be used with pilot holes and are available in diameters between 3 and 20mm for a 2:1 depth-to-diameter ratio; with oil feed holes, depth-to-diameter ratios of 3:1 and 5:1 ratio in diameters between 3 and 16mm.

Recent MDF applications resulted in a 400% increase in tool life when producing counter-bores within a 34CrMo4 steel gear frame.

The MDF tool was run at 65m/min with a 0.1 mm/rev feed rate.

Meanwhile, on a C35 automotive component featuring a starting surface of 60deg, MDF significantly reduced cutting-edge damage and chipping compared to existing competitor tool methods. The MDF was run at 80m/min and 0.45mm/rev.

The latest additions to the MDF series further expand the higher-performance Sumitomo drill solution offering, where both the SumiDrill SDP and SDM Power Series enables higher-productivity drilling for holes between 3 and 16mm
diameter to depths of 7xD.

In addition, the Super MultiDrill XHGS and XHGA types are for deep-hole drilling applications up to 30:1 ratio and can be applied across the spectrum of materials from aluminium to steel.

Be seen in all the right places!

EMO 2019 TCT Show 2019 TOOLEX 2019 Northern Manufacturing 2019 Advanced Engineering 2019 Metalex 2019 Machine Tool Indonesia 2019 WIN Eurasia 2020 MACH 2020