Spline Crankshaft for FMC Bean E04 Series (SKU:P509529) Forged alloy steel per API 7K (tensile strength ≥610MPa) with stress-relief treatment and dual-frequency induction hardening (surface hardness HRC58-62). SAE J495 Class 10 spline (Ra≤0.8μm flank finish), fatigue rated 10⁷ cycles for hydraulic motor mount compatibility. Direct replacement for post-2000 E04 mud pump power ends.
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