At the cam nose the radius of the cam is necessarily small, this being counter- productive to lubricant film generation. in addition the mean entraining velocity is _ modest. The relative constancy of these two quantities over the region of the nose explains why the film thickness varies little in this locality. It is instructive’ to develop the consideration of film thickness generation a little further by presenting the results of some straightforward calculations. The case considered is detailed in Appendix 1 with an operating dynamic viscosity of the lubricant of 0.01 Ns/m2. Two camshaft rotational frequencies will be taken - 1200rpm (2OHz) and 3000rpm (5OHz). The cam nose radius will be taken as 6mm and the film thickness also calculated on the flanks where the radius is at its maximum value of about 120mm. According to the line contact elastohydrodynamic lubrication theory the minimum lubricant film thickness predictions are shown in Table 1. At the camshaft frequency of ‘l200rpm the load transmitted between cam and follower was 54ON at both the nose and flank locations whilst at 3000rpm the respective values were 275N and ZOOON. A sample calculation is presented in Appendix 2.