·Understanding the Importance of Polishing Camshaft journals are the cylindrical surfaces on which the camshaft bearings play a vital role in transmitting motion from the camshaft to the valves Rough or unpolished journals can cause excessive friction leading to premature wear and performance issues Polishing these surfaces eliminates microscopic
·An accurately machined camshaft is essential to the successful operation of a model four stroke engine or a full size one come to think of it Harmonic Cams formed by grinding from a much magnified master cam profile are as good as you can get but our hobby abounds with many very successful model engine where the cam profile has been
1 ·About the Sherline CNC Cam Grinder When building a model engine one of the more difficult components to make is usually the camshaft There are ways to make a mechanical grinder to do the job and make built up cams but this is
·Ive seen a few threads on here about building a camshaft grinder I am kind of in the process of building one Let a guy with the nc grinder make whatever you want then put the time in on the dyno instead Or at the least buy Packard s From the description what you are planning to do will be crap Last edited Sep 15 2023
·Today Comp Cams eight Okuma GC 34 NH CNC camshaft grinding machines and single Landis 3L camshaft grinding machine use carbon fiber hub CBN wheels instead of steel hub CBN wheels Although these lightweight wheels are much costlier they offer improved vibration damping repeatability predictable performance and less frequent dressing
·The core of camshaft machining lies in shaping the cam lobes This involves using a specialized cam grinder to remove material and create the desired lobe profile The grinder s wheel is carefully shaped to match the lobe s geometry and the workpiece is precisely rotated and fed to ensure accurate lobe formation
·The camshaft is ground between centers with the centers rocking into the grinding wheel as controlled by a master As for material I have made steel and cast iron cam blanks I have never seen a forged camshaft
·The next way to make a cam is to build a cam grinding fixture Over the years several variations have been presented in different publications but their function was the same make a master lobe of the shape required and through a rocking follower grind that shape onto your shaft This is sofar the easiest way I have seen to make a camshaft
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