Term
| Gears transmit power efficiently without? |
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Definition
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Term
| Mating gear teeth meet where? |
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Definition
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Term
| What are the basic types of gears? What is the most common? |
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Definition
Spur (most common)
Helical
Herringbone
Bevel
Worm |
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Term
| Which gears have zero end thrust and straight teeth? |
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Definition
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Term
| How many teeth fully in contact in mating spur gears? |
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Definition
| Only one tooth in contact at a time |
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Term
| What is a ring gear? And what direction will the mating gears be rotating? |
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Definition
| An internal gear. The mating gears will always rotate in the same direction |
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Term
| What type of gear turns rotary motion into a linear motion, or vise versa? |
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Definition
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Term
| What gear is stronger than a spur gear and has more than one tooth in contact at a time? |
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Definition
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Term
| What is a major concern with helical gears? What is fix to the issue caused by helical gears? |
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Definition
| End thrust or Axial Thrust. Can be overcome by introducing thrust bearings or make a double helical gear. |
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Term
| What is the helix angle range that can be found? What is the typical Helical Angle found? |
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Definition
7 Degrees- 23 Degrees
with 10-15 being the most typical |
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Term
| What is an advantage of herringbone gears and how are they created? |
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Definition
| No Axial thrust and they must be generated. |
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Term
| Gears that the shafts intersect at less than 90 Degrees are called? |
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Definition
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Term
| Miter gears are a type of gear that____. |
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Definition
| Have the same number of teeth and shafts intersect at 90 Degree (Type of bevel gear) |
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Term
| Zerol Gears are made up of a___ and a ___? |
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Definition
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Term
| What type of bevel gear has non intersecting shafts and non parallel shafts? |
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Definition
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Term
| What type of gear has crossing shafts and has slight thrust? |
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Definition
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Term
| For Diametral pitch, the size of a tooth is represented by a number which specifies? |
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Definition
| The number of teeth per inch of pitch diameter. |
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Term
| The higher the DP the ____ the tooth. |
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Definition
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Term
| On a DP cutter as the cutter number increases the ____ Increases. |
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Definition
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Term
| Module of a gear is equal to the ____? |
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Definition
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Term
| Gear teeth with 14.5 Degree pressure will have a ___ base and be ___ than a 20 Degree pressure angle. |
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Definition
| Narrower tooth Base and be weaker. |
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Term
| What is the minimum number of teeth for a 14.5 degree Pressure angle? what about a 20 degree pressure angle? |
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Definition
32 Teeth (14.5)
18 teeth (20) |
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Term
| What are the most common pressure angles used today? |
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Definition
| 14.5, 20 , and 25 Degree Pressure angles |
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Term
| For gears to run in mesh they must have the same: |
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Definition
DP or Module
Pressure Angle
Basic Type |
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Term
| When are worm gears used? |
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Definition
| When you need high ratio reduction in small spaces. |
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