L16 Pinion Shaft for FMC Bean Series (SKU:P555821) Precision-forged from ZG35CrMoA alloy steel with quenching & tempering (HRC30-35) and nitriding surface treatment, tensile strength ≥950MPa. API 7K compliant for mud pump power ends, gear surface hardness HRC58-62, 40% enhanced fatigue life. Full interchangeability with FMC L1614/L1615/L1616 models.
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