A cus­tomer case study

DEMM Engineering & Manufacturing - - PRODUCT WATCH -

An ex­am­ple of a real-world ap­pli­ca­tion comes with Dormer’s A553 High Speed Cobalt (HSS-E) drill, which has be­come a key com­po­nent for a Swedish man­u­fac­turer.

Larssons Me­chan­i­cal Work­shop, founded in 1951, man­u­fac­ture sub­con­tracted metal prod­ucts, as well as pro­cess­ing and assem­bly sup­port for a wide range of in­dus­tries. One par­tic­u­lar job in­volved the ma­chin­ing of thou­sands of holes in its pack­ag­ing ma­chine rollers made from 2346 and 2333 stain­less steel.

A 12mm di­am­e­ter A553 drill – which fea­tures a TiAlN Top coat­ing and in­ter­nal coolant – is used to drill thou­sands of holes to depths of up to 70mm, which equates to 70-75 me­ters of drilling. For Larssons, HSS is the pre­ferred op­tion as Gun­nar Wis­trand, CNC op­er­a­tor, said: “It is flex­i­ble drill that, un­like a car­bide drill, is more for­giv­ing if some­thing hap­pens. An­other safety ad­van­tage of the A553 is that we can leave the ma­chine with­out risk of fail­ure.”

In this re­spect, the ad­van­tages far out­weigh the dis­ad­van­tages as Gun­nar con­firms, “Util­is­ing the A553 it takes an ex­tra 30 sec­onds for each reel to be pro­duced. How­ever, the process is more pre­dictable and changeover time is greatly re­duced. The ex­tra time it would take to change tools would cost us far more. Not chang­ing the tool as fre­quently also elim­i­nates any safety con­cerns with tool changes.”

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