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Camshafts and Crankshafts: What Do They Do & How Do They Work?

Camshafts and crankshafts are terms you've probably heard if you've discussed internal combustion engines with your mechanic (or fellow car enthusiasts). But what is a camshaft or a crankshaft, and what do they do?

Content：	Industry Technology
Date：	2026-04-07
Editor：	NewCams

Camshaft vs Crankshaft – Difference

One notable difference between a Camshaft vs crankshaft is that the camshaft assists to actuate the inlet and exhaust valves, whereas the crankshaft helps to transform the reciprocating action of the piston into rotational motion.

Content：	Industry Technology
Date：	2026-04-02
Editor：	NewCams

Valve Overlap: Definition, Diagram, Purpose, Advantages, Disadvantages

Without valve overlap, a small amount of exhaust gases will remain in the combustion chamber which will affect the engine's performance and exhaust. Valve overlap promotes better scavenging of the gases in the engine.

Content：	Industry Technology
Date：	2026-03-31
Editor：	NewCams

Camshaft: Functions, Types, Parts, Diagram, Working

In four-stroke engines, the camshaft is responsible for the timely operation of the valves, helping to perform different processes during the engine cycle. It is driven by the engine crankshaft and sits on top of the engine.

Content：	Industry Technology
Date：	2026-03-28
Editor：	NewCams

What Are Dual Overhead Cams?

Generally, engines with dual overhead camshafts (DOHC) are higher performance engines, they produce more power, and can run at higher speeds.

Content：	Industry Technology
Date：	2026-03-26
Editor：	NewCams

Camshaft

camshaft, in internal-combustion engines, a rotating shaft with attached disks of irregular shape (the cams), which actuate the intake and exhaust valves of a piston and cylinder.

Content：	Industry Technology
Date：	2026-01-04
Editor：	NewCams

Understanding Camshafts

In scientific terms, it's all about the area under the curve. Just like that calculus class you wished you didn't have to take (or avoided altogether), the camshaft in your engine is largely based on the same mathematical rules.

Content：	Industry Technology
Date：	2025-12-26
Editor：	NewCams

How Camshafts Work

The camshaft is critical to the basic function of an engine. Comprised of two distinct parts, the cams and the shaft, the camshaft is the element that enables valves to open. As the shaft rotates, the egg-shaped cams (or "lobes") push the valves open in sync with the crankshaft gear.

Content：	Industry Technology
Date：	2025-11-11
Editor：	NewCams

What is Camshaft Lobe Separation?

The Lobe Separation Angle (LSA) is the distance between the centerlines of the intake and exhaust lobes on the camshaft. It is measured in degrees of camshaft rotation.

Content：	Industry Technology
Date：	2025-10-23
Editor：	NewCams

Why would a camshaft wear out or break?

The camshaft itself is rarely to blame when it fails.

Content：	Industry Technology
Date：	2025-09-03
Editor：	NewCams

Advancing / Retarding a Camshaft

To advance or retard a camshaft is to change the alignment between the camshaft and the crankshaft.

Content：	Industry Technology
Date：	2025-08-11
Editor：	NewCams

How do I install a new camshaft?

Installing and adjusting (or "degreeing") the camshaft can be tricky.

Content：	Industry Technology
Date：	2025-07-29
Editor：	NewCams

What is camshaft end play?

End play is how far the camshaft moves in the engine block, from back to front. It is sometimes referred to as how far the cam will "walk."

Content：	Industry Technology
Date：	2025-06-09
Editor：	NewCams

What is the difference between a flat tappet and a roller camshaft?

Camshafts are classified by the type of lifter they use. The lobes on the cam are machined differently based on the intended lifter. Lifters are sometimes called a "follower" or "tappet." They contact the cam lobe with either a flat surface or a wheel.

Content：	Industry Technology
Date：	2025-05-15
Editor：	NewCams

How do I break in my roller camshaft and lifters?

Breaking in an enigne with a roller camshaft is important. Metal particles are created during break-in. This is the biggest issue for the bearings in the roller lifter.

Content：	Industry Technology
Date：	2024-12-21
Editor：	NewCams

How do I break in my flat tappet camshaft and lifters?

Breaking in an engine with a flat tappet camshaft is critical to its performance and long life. This mates the lifters to the cam lobes.

Content：	Industry Technology
Date：	2024-11-18
Editor：	NewCams

O que faz um eixo de cames?

Ao converter o movimento rotacional em movimento linear, o eixo de cames garante que a entrada de combustível e a expulsão do escape ocorram nos momentos certos. Através da compreensão da função do eixo de cames, ganha-se uma visão sobre a notável engenharia que alimenta veículos em todo o mundo...

Content：	Industry Technology
Date：	2023-01-13
Editor：	NewCams

O que é um Eixo de cames? | Como funciona um Eixo de cames?

O eixo de cames é uma das partes mais importantes do motor de combustão interna que regula a abertura e o fechamento das válvulas de entrada e escape...

Content：	Industry Technology
Date：	2023-01-19
Editor：	NewCams

O que é um eixo de equilíbrio

Na engenharia de motores de pistão, um eixo de equilíbrio é um eixo ponderado excêntrico que compensa vibrações em projetos de motores que não são inerentemente balanceados...

Content：	Industry Technology
Date：	2024-09-13
Editor：	NewCams

O que um eixo de equilíbrio faz: Melhorando a suavidade e o desempenho do motor

um componente que se mostra um ator significativo no refinamento do motor é o eixo de equilíbrio. Este engenhoso dispositivo serve para amortecer as vibrações produzidas por um motor durante o seu funcionamento...