these links are provided for information only

Technical Tools and Technical Links




Design Tools

ACME Thread Designer Program
Type in the nominal size and threads per inch for your ACME thread and get all the needed min and max diameters for your machine drawing.
Conversion Factors for Selected Units
A table containing your most often used units conversion factors.  You'll also find a printable wall-chart here!
Drill size chart
Gives the decimal value for standard drill sizes
NPT tap size chart
Recommended drill sizes for National Pipe Threads
O-ring Data Page
Check out this script that gives all of the relevant data for standard oring sizes: OD/ID/cross-section/volume/metric for AS-568A uniform dash numbers
Sheet and wire gage chart
Gives the decimal value for standard sheet and wire gages.  Now gives values for SWG, AWG, BWG and Manufacturer's standard.
 
Screw Data Page
Check out this script that gives all of the relevant data for sockethead capscrews, panhead machine screws, hexhead capscrews and flathead machine screws..  Simulates the TAD-type slide-card.
Spring Designer Program - Compression
Designing a compression spring?  Here's a tool that allows you iteratively calculate a compression sping's characteristics by entering a few simple inputs. 
Spring Designer Program - Torsion
Designing a torsion spring?  Here's a tool that allows you iteratively calculate a torsion sping's characteristics by entering a few simple inputs. 
Standard Tap size chart
Gives the recommended drill size for American standard and ISO metric threads
Surface Roughness
A chart showing what surface roughness ranges are typical for a number fabrication processes


 • More Design Interesting Links
A Dictionary of Measures, Units and Conversions
Calculates conversions for various units
Interactive Mohr's Circle Calculator from UC-Davis:  Online Interactive Calculation of Principal Stresses, Maximum Shear Stresses, and Safety Factors for a Three Dimensional Stress System
physics.nist.gov
Great source for physical constants
webcom.com
Another units conversion site



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