**USB Projection Calculator**- CB created this tool which can be used to calculate the settings you will need to use with the knife jigs for a given angle on a knife blade.**Projection Calculator**- use to calculate the projection needed on the knife jigs for a given angle on a knife blade. (If you care, the math behind this is documented in this link.)**Fly Cutter Projection Calculator**- use to calculate the projection needed for a given nose angle on a fly cutter for the Rose Engine lathe. Use with the fly cutter adapter for the SVD-185/186 jig.**Turning Formulas Calculator**- use to convert RPM to SFM, IPR, etc. (and vice versa)**Machinist's Calculators**- use for the lathe, drill, and milling machine. I have found three variations, so you can use the one you prefer :- Little Machine Shop's Machinist's Calculator (I like working with these guys, so I generally use this one.)
- I-logic Machinist's Calculator
- Theoretical Machinist's Calculator
**Engineers' Edge**has some useful tables and calculators. A few are listed below- Brinell and Rockwell hardness conversion.
- Comparative Hardness Scales for Steel Table.
- Mechanical Design, Manufacturing, and Engineering Calculators and Equations - a WHOLE LOT of web-based calculators.
**Calculator Edge**- Calculators for about everything