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Sun gear
Automatic transmission(AT) enables shift up & down without disengagement of clutch, and is operated by three kinds of gears. Sun gear is the transmission core parts located at the center of the three gears.
(*Currently, not produced.)
Comparison with Conventional method
Cold forging reduces cutting process, eliminates deep drilling, and improves productivity.
Cost comparison
Manufacturing cost reduction by approx. 30% with new manufacturing process.
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