Gear Production

MAR 2014

Gear Production

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March 2014—27 Helical Broaches for Automatic Transmission Plants Mitsubishi Materials USA offers helical broaches designed to produce internal ring gears in automatic transmission plants. High-precision integrated and assembly-type designs are offered. Surface treatments including nitride oxidation, and TiN and VA coatings are available. Mitsubishi Materials USA Corp. | 800-486-2341 | mitsubishicarbide.com Forged Tooth Gears Available Presrite offers precision near-net forged tooth gears with integral teeth designed with a minimum stock allowance wrapped around the fnished gear-tooth profle. The company offers a variety of forged tool gear types, including spur with 0.040" minimum stock for a light hob cut; spur with 0.008" minimum stock for grinding; helical with 0.040" minimum stock for a light hob cut; spiral bevels with 0.020" minimum stock; and net spur gears and splines to fnish size. The near-net forged tooth gears are said to extend tool life, reduce cycle times, and reduce or eliminate rough hobbing. They are well-suited for use in the off-highway, truck, agriculture, automotive, military, railroad, aircraft, oil and mining industries. Presrite Corporation | 216-441-5990 | presrite.com Gear Grinding Machine for Production Line Installation Liebherr's LGG 180 machine for profle and generating grinding is said to provide short grinding times and consistent high quality for large-scale production. The machine is capable of grinding gear components such as those used for passenger vehicle transmissions, including planetary gears, sun gears, bore-type gears, and drive and pinion shafts ranging to 500 mm in length. Its compact size also enables installation within production lines. The grinder's one-table design also is said to provide reliability in fnish quality. The grinding head enables rotation speeds ranging to 10,000 rpm and offers 35 kW of spindle power. The machine is capable of high cutting speeds and feed rates, and undulations can be applied specifcally to gear wheel fanks for noise optimization. See the related feature article starting on p. 21. Liebherr Gear Technology Inc. | 734-429-7225 | liebherr.com Power Chuck for Gear Blanks The Rota NCR six-jaw power chuck from Schunk is designed for machining thin-walled, easily deformed workpieces. The chuck consists of a central chuck piston with master jaws oscillating in pairs for concentric clamping. Clamping is achieved by inserting the attachment bolt in the piston. The six-point contact enables even pre-machined parts to be clamped without deformation, the company says. A pendulum is connected to each set of two-case jaws arranged opposite one another so that the workpiece is centered between the six points of contact. The clamping forces align toward the center of the chuck, enabling maximum roundness of workpieces with conventional jaw clamping. For certain applications such as fnish machining or clamping pre-machined surfaces, the pendulums can be clamped in their center position. In this confguration, all six clamping jaws move simultaneously and concentrically. The chuck is available in 165-, 210-, 250- and 315-mm sizes. Schunk Inc. | 800-772-4865 | us.schunk.com 0314_MMS_Gear_Products.indd 27 2/13/2014 2:47:42 PM

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