Ultrasonic Inspection: Gearboxes

Types of Gearboxes

• Spur - A combination of a small and large wheel that lie parallel to the shaft axes.
• Rack & Pinion - A straight rack translates rectilinearly and may be regarded as part of a wheel of infinite diameter.
• Helical - Like spur, helical gears connect parallel shafts but the teeth lie along helices to the axes rather than parallel to the shaft axes.
• Straight Bevel - Bevel gears are used for shafts whose axes intersect.
• Worm - The worm gears are used for shafts that are perpendicular. It provides a large speed ratio but has significant sliding.
• Hypoid - Hypoid gears are used for offset shafts.

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