1. High precision involute gear for mining machinery 2. Precision can reach DIN 4/ AGMA 13 3. ... teethmore than 12Heat treatmentQuenching and tempering, gear teeth induction quenching, nitriding, carburizationApplicationWind turbine, locomotive, feeding machinery, metallurgy machinery, mining machineryOut diameter300mm min ... width600mm max.Weight15 tons max.x coal mining excavator machinery gear parts