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Spur Gears: These are the most common type of gear, with teeth that are straight and parallel to the gear's axis. They transmit motion between parallel shafts and are used in many machine tool applications.
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Helical Gears: Helical gears have teeth that are angled rather than straight, which allows for smoother and quieter operation compared to spur gears. They are often used in applications where high speeds and precision are required.
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Bevel Gears: Bevel gears have cone-shaped teeth and are used to transmit motion between shafts that are intersecting at an angle. They are common in machines like milling machines and drills.
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Worm Gears: Worm gears consist of a worm (a screw-like gear) meshing with a worm wheel. They provide a high reduction ratio and are used in applications where large speed reductions and high torque are needed.
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Gear Racks: These are straight toothed bars that mesh with a spur gear. They are used in applications where linear motion needs to be converted into rotational motion or vice versa.
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Internal Gears: Internal gears have teeth cut on the inside surface rather than the outside. They are used in applications where space constraints or specific mechanical requirements dictate the use of an internal gear.
These are just a few examples of the types of gears used in machine tools. Each type of gear serves a specific purpose and is chosen based on factors such as the required speed, torque, precision, and space constraints of the machine tool application.