Starrag has demonstrated over the years that the nonexhaustive list of applications performed on its model Bumotec s191FTLR 7-axis turn/mill machine is an evidence of Starrag's expertise in manufacturing complex parts in a single setup whatever raw materials used. Whether for producing parts in the micro-mechanics, aerospace, medtech or luxury goods sectors, Bumotec machining centers dedicated to small workpieces turn out to be a major asset to achieve your production goals and overcome the current market challenges. In the medical field, requiring high level of precision and repeatability, the company's technology is often used to obtain the cost-effective solution for producing implants combining grinding, milling, turning, drilling and polishing processes without interruption.

The requirement to manufacture complex micro size parts is in high demand - particularly hard materials used in medtech industry. One such example is the "femoral head" made out of chrome cobalt. The company's approach to this manufacturing challenge is to start with a plain bar and finish the femoral head in one single setup. The Bumotec s191FTLR machine model (turning, milling, linear motor, retaking) is able to perform six-sided machining, including the grinding of the spheric shape (sphericity 2.5 μm) with such precision and the accurate polishing operation (roughness RA 0.05) without interruption of the cycle, which takes about 12 minutes to complete. Once the bar are loaded, the machine takes very little supervision.

The requirement to produce a precise femoral head is accomplished by using the machine's dynamic correction capabilities and Renishaw's contactless part probing techniques. With its uniquely designed full-size subspindle, the FANUC linear motor driven Bumotec s-191FTLR is able to precisely turn, mill, grind, surface finish and f5-axis machine medical femoral head from high mix small batches to large-volume serial production.

The advantage of machining such complex shapes in a single cycle is realized through: quick change over, higher productivity, lower cycle times, less floor space and the sharp reduction in part handling. These benefits yield a more accurate and reproducible part at a lower manufacturing cost than traditional machining methods requiring numerous setups over various machines.