Helpful little calculators and formulas for many machining projects. Choose from the various calculators and then provide input from your specific project.

• Speeds & Feeds - Find the correct cutting speed and feed rate.
• Bolt Circle Layout - Find the locations of holes on a bolt circle.
• Bolt Circle Diameter - Find the diameter of an existing bolt circle.
• Sine Bar & Sine Vise - Find the height of spacer blocks to use.
• Tap, Drill & Die - Find tap drills, closest drills, and die threading guidance
• Knurling - Find the workpiece diameter that’s best for the knurl you are using
• Threading/Change Gears - Find change gear options based on your lathe setup