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A camshaft is responsible for opening the valves. A camshaft has several cams along with the length, two cams for each cylinder, one to move the inlet valve and the other to operate the exhaust valve.
A camshaft is only a shaft on which cams are installed. The camshaft is mounted on bearing in the lower part of the cylinder block, most in-line engines. In some engines, it is placed on the cylinder head.
1. Cam Bearing Journals
The cam is a rotating component that provides reciprocating or oscillating motion to the follower by direct contact. This is typically used to change the movement from the rotary to linear.
2. Bearing Shell
The bearing shell is part that is mounted on the cam bearing journals. It helps to protect the camshaft from breaking the engine block in case of engine failure. Bearing shells keep the camshaft in a smooth rotation.
3. Lobes
During the rotation of the camshaft, the lobes work with the motion of the piston. The purpose of lobes is to open and close the valves for intake and exhaust gases. Its speed usually depends on the engine speed.
4. Thrust Plate
When using a roller cam you will need to provide some means to support the cam at the rear of the engine. The thrust plate is attached between the cam and timing gear and mounted on the front cover for proper end play.
5. Chain Sprocket
A chain sprocket is attached to the camshaft end of the engine to retain the timing belt. This sprocket is attached to a chain. These sprockets are capable of turning at the same speed even if they do not touch.
6. Woodruff Key
The woodruff key is also the main part of the camshaft of the engine that is used to retain the cams at the right time.
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