Hardinge’s Swiss-style collets are designed for precision machining of small parts suitable for the medical and aerospace industries. They are burr-free and finish-ground to provide a smooth and concentric gripping area (order hole) for barstock and workpieces.
According to the company, keeping barstock unmarked, holding a small diameter on center, holding a thin-wall part, ejecting parts and working with extruded bar shapes are common gripping dilemmas for the Swiss-turning industry. To remedy these issues, the company says it can provide order holes with accuracy measuring 0.0005" or better for holding strict tolerances, as well as microinch finish-order holes. It manufactures collets and guide bushings for D-shaped and other extruded stock shapes, along with pickoff collets with a built-in spring ejector that pushes the part into a basket or conveyor to automate the process. Other Swiss-application collets include stepped, tapered, chamfered, radius and off-center order holes, and over-the-shoulder collets.