Machine Design
For same pulley diameters, center distance, belt speed and belt and pulley materials,

Open and crossed belt drives transmit same power
Power transmission does not depend upon open and crossed types of constructions
Open belt drive transmits more power than crossed belt drive
Crossed belt drive transmits more power than open belt drive

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Machine Design
The creep in the belt is due to

Material of belt
Unequal extensions in the belt due to tight and slack side tensions
Stresses beyond elastic limit of belt material
Effect of temperature on belt

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Machine Design
In hydrostatic bearings

The oil film is maintained by supplying oil under pressure
Grease is used for lubrication
The Oil film pressure is generated only by the rotation of the journal
Do not require external supply of lubricant

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