Profile: Whirltronics, Inc. supplies rotary lawnmower blades. We are accredited with ISO 9001:2000 certification. Our in-house manufacturing capabilities include blanking, milling, forming hot & cold, cold & hot form cells, austemper heat treat, straightening, balancing, painting and packaging. Our austempering is the isothermal heat treatment, when applied to ferrous metals will produce a stronger and tougher structure than the structures obtained from other conventional heat treat processes.