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When grinding a workpiece between centres, what method of feeding is typically used?

  1. Hand feed

  2. Gravity feed

  3. Carriage feed

  4. Centrifugal feed

The correct answer is: Carriage feed

When grinding a workpiece between centres, the carriage feed method is typically employed. This approach involves using the machine's carriage to move the workpiece back and forth during the grinding process. The carriage feed is advantageous as it allows for a controlled and consistent feed rate, which is crucial for achieving an even finish and precise dimensions on the workpiece. In grinding operations, especially when dealing with precision components, accuracy in the feeding mechanism is paramount. The carriage feed provides a reliable means of maintaining that accuracy throughout the grinding cycle. This method also facilitates better operator control and can easily accommodate different workpiece sizes and shapes, making it highly versatile in millwright applications. Other feeding methods, such as hand feed, may introduce inconsistencies that can lead to uneven grinding and affect the quality of the finished workpiece. Gravity and centrifugal feed systems are generally not applicable in this precise context, as they do not offer the control and accuracy required in grinding operations between centres.