At the end of this module, you will be able to:
- Define gear trains and ratios
- Identify gearboxes and performance specifications
- Differentiate between gear types, including spur, helical, bevel, worm, rack and pinion, and crown gears
- Identify additional gear types, including herringbone, spiral hypoid, and planetary
- Define clearance and backlash
- Describe the role of right angle drives
- Differentiate between worm drives, double enveloping worms, and double lead worms
- Describe the complications of noise, wear, and friction loss
The following key questions are answered in this module:
What are the four types of gear trains?
The four types of gear trains are: simple, compound, reverted, and epicyclic.
What is the gear ratio?
The term gear ratio refers to the rates at which the last and first gears rotate. To figure this ratio, the number of teeth of the driven gear is divided by the mating teeth of the driving gear.
What are the most common gear types?
The most common gear types are spur, helical, bevel, worm, rack and pinion, crown, herringbone, spiral hypoid, and planetary.
What are typical problems that can occur with gears?
A number of problems can occur with gears, including noise, wear, and friction loss.
Below is a transcript of the video sample provided for this module:
Although all gears work similarly, they do come in different shapes, and configurations, and have different applications. The most common types of gears include spur, helical, bevel, worm, rack and pinion, crown, herringbone, spiral hypoid, and planetary.
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