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ON MFG ON MFG AD&P; > February 2014 > On Mfg Superfnishing Smaller Crankshafts p The Thielenhaus Technologies CrankStar tape-based superfnishing machine was designed for crankshafts with minimal bearing clearances, supporting the proliferation of smaller engines. What: The CrankStar, a tape-based superfnishing machine for crankshafts with minimal bearing clearances Who: Thielenhaus Technologies (thielenhaus.us/en) Important to note: The CrankStar allows microfnishing of crankshafts with journal distances of just 33 mm. Crankshafts for three- to six-cylinder engines can be processed without changing the set-up. In addition to machining the usual main bearing, pin bearing, and thrust bearing surfaces, the front pivot pins can be machined in a single- or multi-step process. The machine deburrs fange boreholes as well (an option). The machine has a 200-m long tape, a frst for a vertical machine. A monitoring system checks things like tape end, breakage and other factors to keep uptime high. When a change is required, tape rolls are replaced from the front of the machine, reducing the strain on the operator. Pertinent data: Crankshafts made of cast iron or steel with a distance between center of 300 to 650 mm and a maximum swing diameter of 210 mm and a stroke of up to 110 mm can be fnished on the microfnishing / superfnishing machine in one or more steps. Cutter for More Efcient Profling, Shoulder Milling What: The Walter Blaxx F5138 helical fute cutter designed for profling and shoulder milling steel, cast iron, stainless steel, non-ferrous metals, or materials with difcult cutting properties Who: Walter USA (walter-tools.com/us) Important to note: The F5138 has four-edged, tangential indexable inserts designed to achieve profling and shoulder milling feedrates up to 30% higher per tooth than conventional cutters. These inserts are positioned to ensure there is a large mass of carbide in the direction of the cutting forces and a large material cross-section providing maximum rigidity. Vibration is reduced by the helically positioned cutting edges with free-cutting geometries and concentricity. Internal coolant supply to all cutting edges is available. Pertinent data: The F5138 has four available grades of Walter's "Tiger-tec Silver" cutting material: two for steel and cast iron (WKP25S and WKP35S) and two for stainless steel and difcult-to-cut materials (WSM35S and WSP45S). Diameters range from 1.5 to 3 in. with two diferent cutting lengths per diameter. p The Walter Blaxx F5138 cutters are designed for profling and shoulder milling various materials. T-Slot Milling Cutters What: The SD-SP15 family of narrow slotting and groove milling cutters Who: Iscar (iscar.com) Important to note: These slot milling cutters consist of interchangeable, solid carbide T-slot 1.25-in. diameter milling heads with eight teeth and cylindrical steel shanks assembled with a spline connection designed to withstand cutting forces during slot milling and bending forces caused by long overhangs. An adapter is available with the SP15-size spline connection on one side and a threaded connection on the other side, enabling the use of all MULTI-MASTER T12 standard shanks. Pertinent data: The SD-SP15 milling cutters have a width range of 0.125 to 0.250 in. for a maximum depth cut up to 0.315 in. p Iscar's SD-SP15 family of T-slot milling cutters have 1.25-in. diameter milling heads with eight teeth. 44