Crank and camshaft sprockets help to maintain synchronization between the crank and cam shafts to ensure your engine stays in top running condition. Eventually, though, sprockets can wear down or lose teeth. This can cause the timing chain to skip, which will wreak havoc on your engine. This is why it’s important to invest in a high-quality replacement.

In the past, cam cam sprocket were formed from sintered components, but these are expensive to manufacture. In order to lower the manufacturing costs, stamping has been used in recent years to fabricate cam sprockets. However, the sprockets have been difficult to fabricate because of their complicated shapes.

To solve this problem, the present invention provides a cam sprocket 4 that is fabricated by stamping. The sprocket is formed in the shape of a saucer-like portion having a cylindrical portion jutting out in one axial direction. The sprocket is also provided with a female threaded hole 8 a into which a bolt 9 is screwed. The sprocket is further provided with a key-shaped protrusion 8 b at a position close to the female threaded hole.

Understanding the Importance of Cam Sprockets in Engine Performance

This protrusion helps to ensure that the bolt is correctly inserted into the camshaft sprocket and is fixed to it in this way. The sprocket is furthermore provided with bolt holes at a plurality of locations in circumferential direction at a radially intermediate region between the marker hole and the external teeth, and the sprocket is fixed to the cam shaft by screwing bolts through these bolt holes into the flange of the cam shaft.