Sandvik Coromant extends CoroMill 176 range of full profile hobs

CoroMill 176 was initially launched in modules 4-6 (module is the pitch diameter divided by the number of teeth). However, the series was soon expanded to incorporate modules 4-8, and now includes module 9. Available for roughing, semi-finishing and finishing operations, this novel assortment of tools offers a solution for both hobbing machines and multi-task machines/5-axis machining centres. Hobs can be supplied with standard carbide inserts for generating gear profiles in accordance with DIN3972-2, although Custom Made options are also available for specific profiles with, for example, addendum modification, protuberance, tip chamfer and tip relief. Insert grade GC1030 with multi-layer coating is offered for high levels of wear resistance and edge line toughness in ISO P (steel) gear milling operations. The hob is registered in accordance with DIN3968 class B, but generates a gear quality extremely close to what can be expected from a class A hob. Insert changing is quick and easy, and yet features modern wedge-clamping technology for positional repeatability and the groundbreaking iLock interface for high precision and stability First introduced 18 months ago, CoroMill 176 is an indexable insert hob that can halve cutting time, says Sandvik Coromant, largely through the application of cutting speeds up to four times higher than conventional high speed steel (HSS) cutters and a large number of effective inserts. The cutter offers a full-effective design compared to the half-effective designs on multi-segment hobs with tangentially mounted inserts.