Resources

Essential drilling and machining reference charts including melting points, hardness scales, thread sizes, torque conversions, and drill dimensions.

Melting Points of Common Metals Chart (in Fahrenheit)

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Knoop Hardness Scale: Material Hardness Comparison Chart

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American Standard and ISO Metric Thread Sizes and Tap Drills Chart

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Standard NPT Tap Drill Sizes and Decimal Equivalents

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Torque Conversion Chart: Foot Pounds (ft-lbs) to Newton Meters (N-m)

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Recommended Tool Speed Chart

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Taper Length Drill Dimensions

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Jobber Length Drill Dimensions

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Screw Machine Length “Drill Bit” Dimensions

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