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Heavy-Duty Crankshafts for Excavators & Machinery

The crankshaft is the structural backbone of the internal combustion engine. Its primary role is to convert the linear motion of the connecting rods into the rotational mechanical energy required to drive your equipment. We are known to provide high-quality crankshafts engineered to withstand the extreme torque and high-pressure loads characteristic of a heavy-duty diesel engine.

Our machinery engine parts are precision-machined to ensure perfect balance. By choosing premium-grade engine parts, you safeguard your machine against vibration-related fatigue, ensuring engine performance remains consistent even in the most grueling Australian operating conditions.

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21 products

Crankshaft 236-1005009-D2 for YaMZ-236 – MTZ Tractor

Crankshaft 236-1005009-D2 for YaMZ-236 – MTZ Tractor Engine Component

Regular price $314.00
Sale price $314.00 Regular price
Engine Crankshaft 364-2829 330-1736 for CAT C4.4 – Excavator

Engine Crankshaft 364-2829 330-1736 for CAT C4.4 – Excavator

Regular price $1,334.00
Sale price $1,334.00 Regular price

Collection: Crankshafts

Engineering for Maximum Engine Protection

In a heavy-duty diesel engine, the crankshaft operates under relentless stress. Any minor flaw in the forging can lead to catastrophic engine failure, such as snapped journals or cracked connecting rods. Utilizing quality engine parts from IMARA provides the protection necessary to prevent such engine damage during peak workloads.

A precision-balanced crankshaft also helps maintain the integrity of the combustion chambers. By ensuring the pistons reach the exact height required at the cylinder head, the crankshaft facilitates an optimal air-fuel mix. This precision enhances fuel economy and ensures the engine is fuel efficient, preventing the leakage of combustion gases that can lead to power drops.

Our Range of Precision-Forged Crankshafts

We supply crankshafts for major equipment brands, tailored to your specific engine model. Every unit is rigorously tested to ensure it meets or exceeds OEM tolerances for long-term reliability.

1. Forged Steel Crankshafts

Our forged steel crankshafts offer maximum strength and fatigue resistance. These are essential for high-performing internal combustion systems that operate under constant high-load cycles. The forging process ensures a superior grain structure, providing the durability needed to handle high-pressure combustion without the risk of fracture.

2. Precision-Ground Journals to Reduce Friction

The longevity of a crankshaft depends entirely on its lubrication. Our units feature precision-ground journals and polished oil ways to ensure that engine oil reaches the bearings without restriction. This design helps reduce friction and allows for a stable oil change interval, keeping your maintenance costs predictable.

3. Harmonic Balancing and Vibration Control

Excessive vibration is a leading cause of engine failure. Our crankshafts are balanced to eliminate the harmonics that can damage the cylinder head and mounting brackets. This balance ensures that engines running at high RPMs stay smooth, protecting the entire rotating assembly.

Optimizing Engine Performance and Lube Integrity

A perfectly balanced crankshaft is the key to achieving the highest fuel economy and power output. When the rotating assembly moves with minimal resistance, the engine consumes less fuel to generate the same amount of power.

  • Oil Viscosity Management: Proper journal clearances ensure that motor oils of varying oil viscosity can maintain a protective film, whether you use conventional oil or high-quality engine oil.
  • Clean Lubrication: Smooth oil passages ensure that your oil pump can maintain the correct pressure, while a high-grade oil filter keeps the journals free from scoring.
  • Preventing Oil Issues: By maintaining perfect alignment, our crankshafts prevent the uneven wear on oil control rings that causes an engine to start burning oil or suffer from excessive oil consumption.

Technical Support and OEM Fitment

Because the crankshaft is the core of the engine, precision is non-negotiable. Variations in stroke length or gear configuration can vary significantly between different engine models. We use your engine serial number to provide an exact match for your machine.

Our technical experts understand how the crankshaft interacts with pistons and liners to create a balanced, efficient power plant. By providing high-quality parts that fit perfectly the first time, we help you avoid "Machine Off Road" (MOR) delays and ensure your engine oil consumption remains within factory specs.

Rapid Logistics for Major Engine Overhauls

We understand that a crankshaft failure is a major event that halts production. We have optimized our supply chain for the rapid dispatch of heavy machinery engine parts across Australia. Whether you are performing a planned mid-life overhaul or an emergency repair, we deliver the quality engine parts you need to restore your engine's power fast.

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