Sources for engineering data on parts and materials.

## Timing belt theory

ThomasNet provides a link to a useful white paper on Timing Belt Theory by Gates-Mectrol:

http://www.thomasnet.com/white-papers/abstract/101106/timing-belt-theory.html

http://www.gatesmectrol.com/

## Gear geometry

Gear geometry data is available from PIC Design Inc. which is now part of RBC Bearings at the link:

http://pic-designcatalog.com/Images/pdfcat/section_12.pdf

RBC Bearings Logo

Stock Drive Products provides an on-line Handbook of Gears at the website:

http://www.sdp-si.com/products/Gears/Index.php

Stock Drive Products Logo

The Gleason Gear has a lot of useful information:

http://www.gleason.com

The American Gear Manufacturers Association provides standards for sale on-line at the site:

https://www.agma.org/standards/.

AGMA Logo

## Mechanisms videos at Colorado State

Prof. David Alciatore has a large number of videos illustrating machines, physics principles and billiards, including high speed videos.  Video demonstrations of mechanisms can be found at the following site as well as links to much more:

http://video_demos.colostate.edu/mechanisms/index.html

## 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.

## Diesel Engine Animations

This are two animation of the operation of a diesel engine.  The first focuses on the four stroke cycle. The second start with the turbo-charger, and makes its way through the engine.

## Engine Animation

This YouTube animation shows the animated assembly of a solid model of a four-cylinder engine.  It interesting just to see the number of fasteners, but it is worth waiting for the animation of the four-stroke cycle that occurs about two-thirds through.