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Inert Atmosphere Pit Furnace for Heat Treating Automotive Parts No. 1040 is a 2,200°F (1,204°C) inert atmosphere pit furnace from Grieve used for heat treating automotive parts in bas- kets at the customer's facility. Workspace dimensions of this furnace measure 36" wide × 36" deep × 48" high. 78 kW are installed in heavy gauge, high temperature Kanthal AF alloy wire heating elements of rod overbend design and powered through a low voltage transformer to heat the workload. This Grieve pit furnace has 11" thick insulated walls comprising 4 1 / 2 " thick 2,600°F firebrick, 2 1 / 2 " thick 2,300°F firebrick and 4" 1,900°F block insulation, as well as an insu- lated floor comprising 7" of castable refactory and 4" block insulation. Other features include a 1 / 4 " plate steel exterior re- inforced with structural steel and an air-operated, rear-hinged door. Inert atmosphere construction includes continuously welded outer shell, high temperature door gasket, sealed heater terminal boxes, inert atmosphere inlet, outlet, flowme- ter and manual gas valve. Controls on the No. 1040 include a digital indicating tem- perature controller, manual reset excess temperature control- ler with separate contactors and an SCR power controller. :: The Grieve Corp. 847-546-8225, grievecorp.com Vitrified cBN Wheels Offer Better Operator Safety Saint-Gobain Abrasives' CarbonForce, a lightweight line of vitrified cBN wheels for OD grinding, have high strength carbon fiber cores, are 75 percent lighter than heavier steel-hubbed wheels and pro- vide the safety and performance-enhancing benefits of a precision superabrasive wheel. With their lightweight carbon fiber core, these wheels reduce labor costs and strain on the operator and often eliminate the need for a crane because they meet most safe lifting weight limits. The wheels exhibit high strength versus centrifugal force and have been qualified to run at MOS of 31,496 fpm (160 m/s) for wheels with an OD >7.9" (200 mm). The low thermal expansion of the carbon fiber increases safety and performance. The perfect combination of a robust, thermally stable, lighter weight core with vibration dampening technologies and an advanced vitrified cBN bond system means CarbonForce wheels require less operator intervention to control part qual- ity. This dynamic combination reduces dressing frequency, while increasing wheel life. The wheels provide reduced cycle times by allowing the operator to mount four CarbonForce wheels versus one steel rim wheel onto a four-phase cam shaft for simultane- ous grinding of all four lobes in one operation. Cycle time, change-overs, dressing frequency and labor costs can all be reduced by up to 75 percent by changing out all four wheels. The lightweight design of the wheels extends bearing, spindle and overall machine life and reduces power draw and energy consumption for accel- eration and deceleration in linear and rotary movement, the company says. :: Norton Abrasives, Saint-Gobain Abrasives Inc. 800-446-1119, sgabrasives.com PRODUCTS 40 PRODUCTION MACHINING :: JUNE 2017