TPT November 2008

C utting, S awing & P rofiling T echnology

Product advancement in one-way cold saw blades

Kanefusa Corporation, Japan, is a leading manufacturer of saw blades and industrial machine knives. With annual sales of over US$160 million and 4 per cent spent on R&D activities, the company has pioneered cold sawing technology using one-way saw blades. This technology is claimed to be superior to band and metal saws, leading to increasing popularity among manufacturers of automotive parts or machine elements (such as bearings). On average, it is claimed that a cold sawing machine can replace 3 band or metal saws. This is possible due to the cut cycle times of one-way saw blades, which are significantly faster. They are capable of outlasting band, metals and grind-able saw blades. One-way saw blades are tipped with very durable grades of cutting edge materials, such as cermets or coated tungsten carbides, which are difficult to grind. The tooth geometry of these saw blades allow them to perform better and cut cleaner. The geometry is so unique that they cannot be reground on conventional grinding machines.

It is even possible to run the saw blade until the teeth come off, without concern of damaging the saw blade. Another tremendous advantage of the one-way saw blades is their high process reliability. One-way cold saw blades cut solids and pipes made from low carbon, high carbon and stainless steel. Users often report a sharp drop in performance after grinding. In the case of one-way saw blades,

 The Ferro Max Tube saw blade from Kanefusa

performance is very consistent – blade-after-blade. Further advantages are the minimal amount of lubrication required and the thin kerf compared with grind-able cold saw blades. Kanefusa has recently released the Ferro Max series of cold saw blades, which has made rapid advances in the bearing industry. Ferro Max has set a new performance standard due to a newly developed coating, improved carbide grade and new blade design. The Ferro Max Tube is designed to cut thin walled tubes. In addition to a unique tooth shape and exclusive cutting edge material (available only to Kanefusa), the company has produced a tipped saw blade with a tooth pitch of 6.39mm. At a user in the UK, a regular HSS-saw blade (D = 300mm, 180 teeth) cut 2,000 pieces of ST37 (D = 35mm, wall thickness = 1.8mm, tensile strength = 800N/mm 2 , cutting speed = 120m/min), on a Bewo ECH108M machine, while Ferro Max Tube (D = 300mm, 150 teeth) cut over 20,000 pieces. Kanefusa Corporation – Japan Fax : +81 587 95 7226 Email : g-heubeck@kanefusa.co.jp • Website : www.kanefusa.net

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