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Gear and Gear Unit Design: Theory and Practice

Gear and Gear Unit Design: Theory and Practice. Instructor: Prof. Rathindranath Maiti, Department of Mechanical Engineering, IIT Kharagpur. Over and above the outline of gear design that are taught in undergraduate and postgraduate levels through the basic course of design of Machine Elements or specialized course Mechanical Drives, detail aspects of practical design in industries will be focused. The course would help to fill the gap the knowledge at graduation and step into producing the detail design and drawing of gear units in Industries. The course is developed based on long time research, teaching and working in industries in this area. (from nptel.ac.in)

Lecture 10 - Crossed Helical Gear (cont.), Worm Gear

A Workout Example of 90 degree Crossed Axes Helical Gear (Continued from earlier Lecture), Choice of Initial Helix Angle of Gear - Limitations, Transformation of 90O Crossed Axes Helical Gear to Worm Gear, Similarities and differences in 90O Crossed Axes Helical Gear and Worm Gear, Strength Basis Design of Crossed Axes Helical Gear and Worm Gear.


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Lecture 01 - Introduction
Lecture 02 - Laws of Gearing, Kinematics and Geometry
Lecture 03 - Laws of Gearing, Kinematics and Geometry (cont.)
Lecture 04 - Involute Toothed Gear Properties and Terminology
Lecture 05 - Tutorial: Fundamentals of Involute Toothed Gearing
Lecture 06 - Involute Straight Tooth Spur Gear
Lecture 07 - Helical Tooth Spur Gear and Loads on Gear Shaft
Lecture 08 - Design of Bevel Gear
Lecture 09 - Crossed Helical Gear
Lecture 10 - Crossed Helical Gear (cont.), Worm Gear
Lecture 11 - Gear Unit Design - Selection of Stage Ratios, Pinion and Gear Teeth Numbers
Lecture 12 - Gear Unit Design - First Stage Pinion and Gear Design (Beam Strength Basis)
Lecture 13 - Gear Unit Design - Failure of Gear Tooth (Probable Dynamic Load and Wear Load Capacity)
Lecture 14 - Gear Unit Design - First Stage Pinion and Gear Design (Probable Dynamic Load and Wear Load Capacity)
Lecture 15 - Gear Unit Design - First Layout (After Gear Design)
Lecture 16 - Bearing Arrangement - Gear Box Shafts
Lecture 17 - Bearing Load Calculation - Intermediate Shaft
Lecture 18 - Bearing Selection and Introduction to Shaft Design Verification
Lecture 19 - Design Verification of Gear Box Shafts
Lecture 20 - Development (Layout) of Intermediate Shaft
Lecture 21 - Development (Layout) of Input Shaft and Integral Pinion
Lecture 22 - Development (Layout) of Output Shaft and 2nd Stage (Output) Gear
Lecture 23 - Development (Layout) of Output Shaft (cont.), Loads on Shaft and Bearings
Lecture 24 - Output Shaft-Bearings Lives
Lecture 25 - Design Verification of Output Shaft
Lecture 26 - Design Verification of Input Shaft (Including Bearing Life Estimation)
Lecture 27 - Finalizing Design Including the Sizes of the Keys
Lecture 28 - Development of Plan and Elevation of Gear Reduction Unit
Lecture 29 - Development of Plan and Elevation of Gear Reduction Unit (cont.)
Lecture 30 - Development of Plan and Elevation of Gear Reduction Unit (cont.)
Lecture 31 - Detail Drawing of Intermediate Shaft and First Stage Gear
Lecture 32 - Concluding Remarks on Conventional Gear and Gear Unit Design
Lecture 33 - Involute Spur Gear Tooth Correction
Lecture 34 - Involute Spur Gear Tooth Correction (cont.)
Lecture 35 - Involute Spur Gear Tooth Correction (cont.)
Lecture 36 - Involute Spur Gear Tooth Correction: Tutorial
Lecture 37 - Involute Spur Gear Tooth Correction: Tutorial (cont.)
Lecture 38 - Tooth Tip Interference, Avoidance and Contact Ratio in Involute Internal Gearing
Lecture 39 - Gear Train, Internal and Epicyclic Gearing
Lecture 40 - Harmonic Drive Gear
Lecture 41 - Reverted Gearing and Differential Gearing
Lecture 42 - Machine Tools Speed Change Gear Unit
Lecture 43 - Machine Tools Speed Change Gear Unit (cont.)
Lecture 44 - Machine Tools Speed Change Gear Unit (cont.)