A new gear grinding machine for composite materials has a first cost of p = $100,000 and can be used for a maximum of 6 years. its salvage value is estimated by the relation s = p(0.85) n , where n is the number of years after purchase. the operating cost will be $75,000 the first year and will increase by $10,000 per year.Aug 08, [imts preview] reishauer for new gear grinding machine. reishauer’s rz 260 has not only been increased in size, all relevant components have been adapted to handle higher loads and forces, which occur when grinding larger gears. gears with an outside diameter of 260 mm and modules up to 4 mm can be ground..