Belt Pulley

Belt Pulleys

Belt pulleys are the essential gears of the belt drive systems, responsible for transferring power from the crankshaft to vital components like the alternator, water pump, and cooling fan. The timing belt provides smooth and reliable power transmission between the timing pulleys. We stock parts fit for leading brands, like Caterpillar (CAT), Komatsu, Deutz, Volvo, Yanmar, John Deere, CASE, New Holland, Massey Ferguson, Bobcat, BMW, Toyota, Maserati, Ford...

Common Pulley Materials

The material a pulley is made from is chosen based on its intended application, balancing strength, weight, and durability.

• Stamped Steel: It’s common and budget-friendly, used for most idler and tensioner pulleys. Tough, durable, and great value for money.
• Cast Iron: High in strength and heavy in weight, it’s a go-to for crankshaft pulleys and vibration dampers on heavy-duty equipment. Its heft helps absorb engine vibrations effectively.
• Aluminum Alloy: Lightweight, it reduces rotational load and boosts efficiency. Widely used in automotive, marine, and high-performance applications.
• Composite Polymers (High-Strength Plastic): Now used for many idler and tensioner pulleys. It runs quieter, has low friction, and resists rust and corrosion really well.

How to Choose the Right Pulley

Use these steps to ensure you find the right fit:

• Match the Part Number: The most reliable method is to match the OEM part number stamped on your old pulley.
• Identify by Application: Use your machine's make, model, year, and engine specifications to filter your search.
• Verify Physical Dimensions: If a part number is unavailable, carefully measure the outside diameter, the bore (center hole) diameter, the width, and the belt profile (e.g., number of V-grooves or serpentine ribs).
• Confirm the Function: Ensure you are selecting a pulley for the correct component, whether it's an alternator, a tensioner, or a crankshaft.

Trouble with a belt pulley isn’t just a noisy problem; it may be your engine’s about to have a breakdown. Replace the pulley in time, and you’ll stop the belt from coming off or your engine accessories from failing. Find the tough, durable belt pulleys you need in our stock, and order yours right now!