When machining high-precision sliding bearings (Fig. 1), our factory has strict requirements on coaxiality. We use the inner hole of the first fine car and the outer circle of the inner hole as the positioning reference. The liquid plastic mandrel is designed. The grease is used instead of the liquid plastic to avoid environmental pollution. The grease is semi-liquid at normal temperature. State, the pressure is evenly distributed. However, it should be noted that the dropping point of the grease must be above 10 °C above the working temperature. When using, turn the screw sleeve 5 (Fig. 2) by hand and push the sliding column 4 to make it run.
Red oak is a hardwood tree that fills wild in the United States and Canada. In the Southern and Northern United States, the tree flourishes in deciduous backwoods. It is the most productive homegrown lumber in Canada, representing practically 50% of all hardwood trees. Being the essential material for red oak hardwood floors, the bounty of the red oak tree is a piece of why this ground surface alternative is so famous.