6D125 Used Camshaft 6150 - 41 - 1120 For Excavator PC400 - 5 PC 450 - 7 - 8
|Item name||Engine Camshaft|
|Application||Engineering Machinery Engine|
|Camshaft code||6151 - 41 - 1112|
|Car model||PC400 - 7 PC400 - 8|
Roller LiftersThere are two major types of camshafts: Flat Tappet and Roller Cams.
Lifters are not actually flat on the contact surface. They do have a slight curve, but it's hard to see. Roller Cams use a lifter with a roller on it. The roller cam looks like the flat tappet cam, but the cam lobes are very different. Roller cams have fatter lobes because of the way the cam lobe contacts the lifter. Roller lifters reduce friction, increase RPM potential and allow higher valve spring pressures to be used. Flat tappet camshafts can only withstand so much valve spring pressure pushing the lifter against the cam lobe.
Cam Lobe Profilesm as you increase valve spring pressure on a flat tappet cam, you increase wear on the cam lobe and the cam contact face of the lifter. This is a limiting factor when compared to a roller setup. To build big horsepower you need to have a cam with a lot of lift to open those valves wide. A lot of cam lift will require a higher pressure valve spring, giving the roller cam/lifter the advantage over flat tappet cams for building higher horsepower engines.
What are performance camshafts?
Camshafts are the most critical part of your engine's performance. Camshafts use a combination of separation angles, lift, duration and lobe acceleration/ramp rates to create what is called a cam profile . The profile you choose determines where your maximum horsepower and torque will occur.
What does duration of camshaft mean?
Camshaft duration is the period of time, measured in degrees of crankshaft rotation, that a valve is open. “Advertised duration” measures duration from the point where the cam manufacturer believes the lobe starts raising the lifter. This is called the checking height and it varies from manufacturer to manufacturer.
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