In accordance with scientific and engineering citation standards, we provide a complete bibliography of the reference publications, metrology standards, and industrial codes backing our calculation engines.
1. Metrology and Unit Conversion Standards
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National Institute of Standards and Technology (NIST) Special Publication 811
"Guide for the Use of the International System of Units (SI)" (2008 Edition). Appendix B contains the verified conversion factors for force, length, and torque metrics.
Visit NIST SP 811 โบ -
ISO 80000-4:2006
"Quantities and units โ Part 4: Mechanics". Establishes global standard symbols, definitions, and equations for mechanical quantities including torque, work, and power. -
Federal Standard H28
"Screw-Thread Standards for Federal Services". Defines thread forms and nominal diameters for mechanical fasteners.
2. Bolted Joints and Fastener Torque Physics
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VDI Guideline 2230
"Systematic calculation of highly stressed bolted joints โ Joints with round extra-tensile steel bolts". The standard reference for the torque-tension relationship and friction losses. -
ASME B18.2.1
"Square, Hex, Heavy Hex, and Askew Head Bolts and Hex Cap Screws". Specifies mechanical standards for fasteners. -
SAE J429
"Mechanical and Material Requirements for Externally Threaded Fasteners". Outlines grading systems (Grade 2, 5, 8) and proof loads.
3. Automotive Gearing and Power Mechanics
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SAE J1349
"Engine Power and Torque Rating Code โ Spark Ignition and Compression Ignition โ Net Power Rating". The standard governing engine horsepower and torque metrics. -
"Race Car Vehicle Dynamics" by William F. Milliken and Douglas L. Milliken.
Provides the academic basis for gearing ratios, tractive force equations, and tire radius calculations.