We are independent & ad-supported. We may earn a commission for purchases made through our links.

Advertiser Disclosure

Our website is an independent, advertising-supported platform. We provide our content free of charge to our readers, and to keep it that way, we rely on revenue generated through advertisements and affiliate partnerships. This means that when you click on certain links on our site and make a purchase, we may earn a commission. Learn more.

How We Make Money

We sustain our operations through affiliate commissions and advertising. If you click on an affiliate link and make a purchase, we may receive a commission from the merchant at no additional cost to you. We also display advertisements on our website, which help generate revenue to support our work and keep our content free for readers. Our editorial team operates independently from our advertising and affiliate partnerships to ensure that our content remains unbiased and focused on providing you with the best information and recommendations based on thorough research and honest evaluations. To remain transparent, we’ve provided a list of our current affiliate partners here.

What is a Crankshaft?

By Jessica Reed
Updated Jan 27, 2024
Our promise to you
WikiMotors is dedicated to creating trustworthy, high-quality content that always prioritizes transparency, integrity, and inclusivity above all else. Our ensure that our content creation and review process includes rigorous fact-checking, evidence-based, and continual updates to ensure accuracy and reliability.

Our Promise to you

Founded in 2002, our company has been a trusted resource for readers seeking informative and engaging content. Our dedication to quality remains unwavering—and will never change. We follow a strict editorial policy, ensuring that our content is authored by highly qualified professionals and edited by subject matter experts. This guarantees that everything we publish is objective, accurate, and trustworthy.

Over the years, we've refined our approach to cover a wide range of topics, providing readers with reliable and practical advice to enhance their knowledge and skills. That's why millions of readers turn to us each year. Join us in celebrating the joy of learning, guided by standards you can trust.

Editorial Standards

At WikiMotors, we are committed to creating content that you can trust. Our editorial process is designed to ensure that every piece of content we publish is accurate, reliable, and informative.

Our team of experienced writers and editors follows a strict set of guidelines to ensure the highest quality content. We conduct thorough research, fact-check all information, and rely on credible sources to back up our claims. Our content is reviewed by subject matter experts to ensure accuracy and clarity.

We believe in transparency and maintain editorial independence from our advertisers. Our team does not receive direct compensation from advertisers, allowing us to create unbiased content that prioritizes your interests.

The crankshaft is located in the engine of a vehicle and converts the force created by the engine's pistons moving up and down into a force that moves the wheels in a circular motion so the car can go forward. Located inside the car's engine, it is connected to all the pistons in the engine and to the flywheel. To understand this shaft, it is important to understand how the pistons and the flywheel work.

A car engine produces motion by creating explosions inside it. The pistons, which are attached to the crankshaft in an engine, are moved down by the explosions inside the cylinders. When the pistons move down, the crankshaft rotates. The pistons are connected to the crankshaft to ensure it moves with them and keeps their movements regulated.

To help smooth out the jerky motions created by the moving pistons, the flywheel is attached to the end of the crankshaft. As the shaft moves, it turns the flywheel in a circular motion. Notches in the flywheel help smooth its motions and connect it to other car parts that turn the wheels. This turns the up and down motion created by the engine into a circular motion needed to move the car's wheels.

For the pistons to work properly, a piece of the engine called the camshaft must rotate and open the intake and outtake valves. These valves open and close to allow the flow of air, which is necessary to create an explosion, into the cylinder. The crankshaft is connected to the camshaft and causes the camshaft to rotate along with it. This ensures the two engine parts work together and are never out of sync.

Problems occur when the crankshaft is too long because it needs extra support to deal with the pressure from the cylinders in the engine. To solve this problem, engines are often made in a V-shape, with short shafts instead of using the straight shape with long ones. A V-shaped engine has two sets of cylinders, one on each side, while the straight engine has only one set of cylinders all in a row. A V8 engine, for example, would have four cylinders on each side instead of trying to place eight cylinders in a straight line.

WikiMotors is dedicated to providing accurate and trustworthy information. We carefully select reputable sources and employ a rigorous fact-checking process to maintain the highest standards. To learn more about our commitment to accuracy, read our editorial process.

Discussion Comments

By Anna32 — On Jun 03, 2011

For 10 years my husband has been trying to explain a crank shaft to me and now, after reading this article, I think I finally get it! One thing I do remember from my "lessons" with him, however, that may help some people is that the flywheel isn't always necessarily called the flywheel.

In a manual transmission it's a flywheel, but some people call them flex plates in an automatic because of the way they are bolted on. It's still the same basic operating principal, but I thought that might help if someone ever heard the term and wondered what it was.

WikiMotors, in your inbox

Our latest articles, guides, and more, delivered daily.

WikiMotors, in your inbox

Our latest articles, guides, and more, delivered daily.