Mold component products feature self-lubricating aluminum bronze 
bushings ideally suited for running with the MP line of Guide Posts.
 These self-lubricating bushings contain graphite plugs which are 
impregnated with oil. When the bushings reach 80-90°F as a result 
of friction between the bushing and guide post, oil is drawn from the 
plug thus lubricating the wear surface. A dark smear pattern is created on the wear surface as the oil and graphite are imbedded into 
the bronze or steel grain. This provides the lubrication necessary for 
continuous performance of the tool.