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Which drive is also known as line shaft drive
Individual Drive
Motor Drive
Group Drive
None
Group Drive
Group drive, historically referred to as a line shaft drive, is a method where a single electric motor drives a long shaft, which in turn powers multiple machines through individual belts and pulleys. This configuration was common in early industrial workshops before individual motor drives became economically viable.
Group drive, historically referred to as a line shaft drive, is a method where a single electric motor drives a long shaft, which in turn powers multiple machines through individual belts and pulleys. This configuration was common in early industrial workshops before individual motor drives became economically viable.
PtotalтАЛ=тИСPmachinesтАЛ+PshaftlтАЛossesтАЛ тАФ Power required for the group drive including friction losses of the line shaft.
A single high-capacity electric motor is connected to a long horizontal 'line shaft' mounted on the ceiling or wall. This shaft rotates continuously. Various machines in the factory are coupled to this shaft using belts, pulleys, and clutches, allowing individual machines to be engaged or disengaged while the shaft remains operational.
Used in old industries where power was distributed via mechanical linkages.
The line shaft requires constant maintenance and lubrication to minimize mechanical friction losses.
Total failure of the line shaft results in the shutdown of all connected machines.
Flexibility in machine layout is extremely poor.
Lower initial cost due to a single large motor instead of multiple small ones.
Higher efficiency of a single large motor compared to several small fractional-horsepower motors.
High maintenance due to belts and shaft bearings.
Danger to operators due to exposed moving shafts and belts.
Inflexibility in the arrangement of factory machines.
Textile mills (historical)
Small machine shops with simple lathe or drill setups
| Feature | Line Shaft | Direct Motor |
|---|---|---|
Drive Type | Group Drive | Individual Drive |
Option A (Individual Drive) uses one motor per machine, which is the standard in modern industrial setups.
The term 'line shaft' refers specifically to the mechanical shafting system used in the group drive setup.
C is correct тАФ Group drive is the nomenclature for a setup where a single motor drives multiple loads via a mechanical line shaft.
In modern competitive exams, remember that individual drives have replaced group drives because they improve safety, energy efficiency, and operational flexibility.