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Questions and Answers
What type of reduction gearing is commonly used in high-torque, lightweight starter motors?
What type of reduction gearing is commonly used in high-torque, lightweight starter motors?
- Spur gearset
- Worm gearset
- Crown and pinion gearset
- Planetary gearset (correct)
What is a characteristic of the gearset used in a Delco-Remy 39 MT starter motor?
What is a characteristic of the gearset used in a Delco-Remy 39 MT starter motor?
- Compact and lightweight (correct)
- Heavy and bulky
- High-speed and low-torque
- Low-ratio and high-slippage
What is the primary purpose of reduction gearing in a starter motor?
What is the primary purpose of reduction gearing in a starter motor?
- To decrease the torque of the motor
- To increase the speed of the motor
- To reduce the weight of the motor
- To transform high-speed, low-torque into low-speed, high-torque (correct)
What is NOT a characteristic of a planetary gearset?
What is NOT a characteristic of a planetary gearset?
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What is an advantage of using a planetary gearset in a starter motor?
What is an advantage of using a planetary gearset in a starter motor?
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Study Notes
Starter Motor Gear Reduction
- In high-torque, lightweight starter motors, such as the Delco-Remy 39 MT, a specific type of gear reduction is used.
- The correct type of reduction gearing is a planetary gearset.
- Planetary gearset is used to achieve high torque and light weight in starter motors.
Other Options
- Crown and pinion gearset is not used in high-torque, lightweight starter motors like Delco-Remy 39 MT.
- Aluminum gear teeth is not a type of gear reduction.
- Viscous drive is not a type of gear reduction used in starter motors.
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