KMODDL Tour

Kinematic models for design

The KMODDL team at Cornell University maintains an excellent digital library of kinematic models with animations.  Access their site at the link:

http://kmoddl.library.cornell.edu/

KMODDL Logo

KMODDL Logo

Fasteners

Machine screw dimensions

According to Shigley and Mischke’s Mechanical Engineering Design (McGraw-Hill 1989) experiments show that the tensile stress supported by a threaded rod equals that of a rod with diameter that is the mean of pitch and minor diameters of the threads.  Thus, the tensile stress area of a threaded fastener is computed from the average of its pitch and minor diameters.

  • Little machine shop provides downloadable lists for tap and clearance holes:  tapdrillsizes.pdf
  • And large listing of fasteners can be found at SmithFast.

 

Spherical Car Door

Spherical eight-bar linkage for a car door

This spherical eight-bar linkage was designed by GimSong Soh to guide a car door from the side to the top of the vehicle. This animation shows the versatility of movement provided by these linkages. (UCI Robotics and Automation Lab)