Crank

💎 Downhole Drilling Mud Pump Crank shaft: Elephant BW-Series Power End

Forged Alloy Steel Crankshaft for Elephant BW- Series Mud Pumps – The Core of Power End Durability

The crankshaft in your Elephant BW- Series pump is the backbone of the power end, translating the input power into the precise reciprocating motion required for the 135 mm stroke. This component endures massive rotational, bending, and shear forces under continuous drilling operation. Our crankshafts are not cast—they are precision-forged from high-quality alloy steel, ensuring superior grain structure, strength, and fatigue resistance compared to standard replacements. Every crankshaft is fully heat-treated and meticulously balanced to minimize vibration and shock loading, which is essential for maximizing the lifespan of main bearings, connecting rods, and the entire power frame.

Key Features & Benefits:

Premium Forged Material: Manufactured from high-grade alloy steel (typically 40CrNiMoA or 42CrMo) for extreme strength and toughness.
Dynamic Balancing: Precisely machined and balanced to eliminate rotational vibration, protecting the main bearings and gear system from premature failure.
Heat Treated Journals: All critical journals (main bearings and crankpin) are subjected to advanced heat treatment and precision grinding to achieve high surface hardness and excellent dimensional accuracy.
Direct Fit for BW- Series: Designed to be a 100% dimensional and functional replacement for the Elephant BW- Series pump, ensuring a hassle-free and perfect installation.
Reliability for HDD: Built to withstand the harsh, continuous duty cycles common in Horizontal Directional Drilling (HDD) and small-to-medium drilling operations where the BW- Series is utilized.

Elephant BW-Series Crankshaft Specifications

Parameter	Detail	Note/Standard
Applicable Pump Model	Elephant (or equivalent) BW- Series	Fits the power end frame.
Stroke Length (eccentric throw)	135 mm	This dimension is set by the distance between the main axis and the crankpin axis.
Manufacturing Process	Forging (Integral Forged or Built-up Forged)	Superior to casting for high-stress components.
Material	High-Grade Alloy Steel	Commonly 40CrNiMoA, 42CrMo, or 34CrNiMo.
Heat Treatment	Quenching, Tempering, and Surface Hardening	Ensures core strength and hard, wear-resistant journals.
Crankpin Journal Diameter	Specific Dimension ± Tolerance	Receives the Connecting Rod Bearings.
Main Bearing Journal Diameter	Specific Dimension ± Tolerance	Supports the shaft in the power end frame.
Gear Connection	Splined or Keyed Shaft End	Connects to the main Herringbone/Pinion Gear.
Standard	API Spec 7K Compliant	Required quality assurance for drilling equipment.