Palm oil as the minimum amount of lubricating base oil measured surface roughness value is the smallest, the best surface quality is obtained, followed by castor oil and cottonseed oil, also obtained a better surface quality.
Palm oil as a trace lubrication of the basic oil when measured surface roughness value of the minimum, get the best surface quality, castor oil and cottonseed oil, but also get a better surface quality.
When palm oil was used as micro lubricating base oil, the minimum surface roughness was obtained, and the best surface quality was obtained, followed by castor oil and cottonseed oil.<br>