©　2016,　Scibulcom　Ltd.　All　rights　reserved.　In　order　to　obtain　the　more　accurate　film　thickness　formula　to　assist　in　the　skidding　analysis　of　high-speed　and　light-load　roller　bearings　(HSLLRBs),　the　oil　film　characteristics　of　HSLLRBs　under　slip　conditions　were　analysed.　Moreover,　the　ellipse　is　adopted　to　be　the　whirl　orbits,　which　is　more　close　to　real　whirling　orbit　than　the　circular　orbit　in　practice.　Based　on　the　oil　film　thickness　modified　formula,　an　analytical　model　was　built　by　taking　bearing　whirl　with　elliptical　orbit　into　account,　and　the　skidding　mechanism　was　investigated　in　terms　of　various　factors　such　as　whirl　orbit,　radial　load,　lubricating　oil　viscosity　and　roller　diameter.　The　results　showed　that　whirl　often　exacerbates　skidding　failure　to　HSLLRBs,　and　the　degree　of　skidding　is　directly　correlated　with　the　whirl　radius,　especially　the　X-radius.　Effects　of　dif　ferent　oil　film　thickness　formulas　on　skidding　of　rolling　bearing　are　different,　Dowson　1977　modified　film　thickness　formula　is　more　fit　to　provide　assistance　in　the　skidding　analysis　of　HSLLRBs.　As　radial　load　increase　or　the　roller　diameter　decrease,　the　influence　of　whirling　on　bearing　skid　and　the　degree　of　skidding　decrease.　Therefore,　for　minishing　skid　so　as　to　improve　HSLLRBs　service　life　and　reliability,　the　whirl　radius　(especially　the　X-radius)　and　roller　diameter　should　be　decreased,　whereas　the　radial　load　should　be　increased　moderately.　The　final　purpose　of　this　study　is　to　support　the　failure　mechanism　and　vibration　analysis　of　HSLLRBs.