Machine Design
A sliding bearing which can support steady loads without any relative motion between the journal and the bearing, is called

Boundary lubricated bearing
Hydrostatic lubricated bearing
Hydrodynamic lubricated bearing
Zero film bearing

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Machine Design
Machine screws are

Similar to small size tap bolts except that a greater variety of shapes of heads are available
Used to prevent relative motion between two parts
Slotted for a screw driver and generally used with a nut
Similar to stud

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