Depending on the use of the machine tool, the feed gearbox and the feed mechanism as a whole is required to process 1. A number of feed steps. 2. A range of feeds. 3. Absolute values of the rates of feed. 4. Type of feed series. 5. The nature of the feed motion. 6. Type of drive from spindle or form a separate electric motor. 7. Required accuracy of the feed rates. 8. Permissible accumulated error of certain transmissions. 9. Loads applied to the feed gearbox 10. Frequency with which the feeds are to be changed. Feed Gearbox Types of Speed Gear Boxes Tumbler Gears Standard Transmission Ratio Gear Drive System The Advantage of Cone Pulley Drive Central Drive system The Selection of a Motor
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