Optimizing Gear Design for Screw Jacks

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SUMMARY

The discussion focuses on designing a gear train for a screw jack, starting with an initial RPM of 1500 and a final RPM of 100. The user specifies a power screw diameter of 0.04 m and seeks assistance in calculating the diameters for three additional gears. Key considerations include ensuring that no pinion has fewer than 12 teeth to prevent undercutting and avoiding tooth counts exceeding 100 due to cost implications. The user is advised to sketch the gear train and establish the gear tooth numbers (n1, n2, n3, n4) while calculating the train ratio.

PREREQUISITES
  • Understanding of gear train design principles
  • Familiarity with gear tooth count and its impact on performance
  • Knowledge of RPM calculations and gear ratios
  • Experience with CAD tools for sketching gear designs
NEXT STEPS
  • Research gear train ratio calculations and their applications
  • Learn about gear tooth design and manufacturing limitations
  • Explore CAD software options for designing mechanical components
  • Investigate the implications of gear diameter on torque and speed
USEFUL FOR

Mechanical engineers, gear designers, and students studying mechanical systems who are involved in optimizing gear design for applications such as screw jacks.

vassos_ael
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i have to design gears for a screw jack. i have initial rpm 1500 and final rpm 100. my gear at the point of the power screw is 0.04 m and i want to calculate the diameter for the other 3 gears. can you please help me thank you
 
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Sketch up the gear train you need to build, with gear tooth numbers n1, n2, n3, n4 and then write down the equation for the train ratio. Look at your given information to see what the train ratio has to be, and then start making some reasonable estimates for tooth numbers.

No pinion should have less than 12 teeth to avoid under cutting when the tooth is being formed. Typically you do not want to go to tooth numbers a whole lot more than 100 as they are more expensive to make.
 

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