... butadiene rubber that efficiently protects the bearing against the entry of contaminants and retains the lubricant in the bearing. SKF ... , rocker arm pivots , pumps , compressors, transmissions , etc.Detailed data of SKF bearing NA4926 is below:Inner diameter : 130 mmOuter diameter ... knWeight: 3.9 kgsBearing running speed: 2600 r/minPart stock list of SKF needle roller bearings : Bearing P/N.d(mm)D ...