LMT introduces hob cutters with Nanosphere coating

LMT will present hob cutters with Nanosphere coating at AMB in Stuttgart.

These hob cutters last longer than standard cutters and also reduce downtime and cycle times.

The Nanosphere coating system enables the cutters to be repeatedly reconditioned to original manufacturer quality throughout their life cycle.

The hob cutters' nanostructure and the multilayer composition of the coating are tailored to dealing with the extreme stresses of hob cutting and were developed specially for rotary tools.

The growing use of dry hobbing and discontinuous cutting gives rise to cracks in the coating of conventional hob cutters, significantly reducing tool life.

The multilayer structure of the Nanosphere coating prevents microcracks running into the substrate unhindered, which ensures the cutting edges remain stable.

The Nanosphere coating's sandwich structure provides better heat insulation, meaning it takes longer for the steel tool to be heated by the high temperatures of the hobbing process.

This helps prevent the egg shell effect.

If the tool's hot base material loses stability at temperatures of more than 500C and then gives way (a process that occurs on a microscopic scale), the flexible multilayer coating also moves with it.

This prevents the coating separating from the substrate and flaking off.

The result is longer tool life.

Nanosphere hob cutters are available from the AMB fair.

The range includes HSS and carbide hob cutters for the mass production of gearwheels in the automotive industry.

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