Corundum is one of the most commonly used abrasive materials. Manufactured from aluminum oxide, the abrasive particles are hard and tough. What’s more, the properties of corundum can be modified by varying its metal oxide content, which also changes the color of the abrasive. Erwin Junker Maschinenfabrik GmbH is exhibiting an extended and comprehensive range of grinding machines at EMO Hannover 2017, including its new corundum series from the ZEMA brand. As a result, the world market leader for high-speed CBN grinding machines now also has efficient solutions for conventional grinding.
Junker claims that the ZEMA brand CNC grinding machines are incredibly versatile, robust and durable. The wide variety of potential applications includes the precise and reliable machining of flanges and journals on crankshafts, as well as transmission, turbocharger and drive shafts. The Junkers corundum range is made up of three series, each with different focal points. The Numerika series is aimed specifically at the series production of longer workpieces up to 3.5 meters. By contrast, the Kargo cylindrical grinding machine is particularly ideal for heavy workpieces such as shafts for generators or electric motors weighing up to six metric tons. Finally, the Flexa series can take care of three different machining tasks in one - internal grinding, external grinding and thread grinding. According to the manufacturer, the robust Flexa series also features a modular design that makes it ideal for medium-volume series production.