Mechanical and Manufacturing Tools

Bolt Torque Calculator

Estimate tightening torque from preload, nominal diameter, and nut factor.

Shaft Power and Torque Calculator

Convert between shaft power and torque at a given rotational speed.

Gear Ratio Calculator

Compute gear ratio and output speed from driver and driven tooth counts.

Belt Length Calculator

Estimate open-belt length from pulley diameters and center distance.

Bearing Life Calculator

Calculate L10 bearing life in million revolutions and operating hours.

Machining Speed and Feed Calculator

Estimate spindle speed and feed rate from cutting speed and cutter data.

Tap Drill Size Calculator

Estimate metric tap drill size from major diameter, pitch, and engagement.

Thermal Expansion Calculator

Calculate linear thermal expansion from length, coefficient, and temperature change.

Spring Rate Calculator

Calculate helical compression spring rate from geometry and shear modulus.

Weld Size Calculator

Estimate fillet weld throat area and approximate capacity from allowable stress.

Tolerance Stackup Calculator

Compute total dimensional tolerance using worst-case or RSS method.

Press Fit Interference Calculator

Estimate diametral interference and contact pressure for press fits.

Center of Gravity 2D Calculator

Calculate 2D center of gravity from point masses for quick mechanical layout checks.

Plate Weight Calculator

Estimate plate mass and weight from dimensions and material density.

Anchor Bolt Pullout Estimator

Estimate anchor pullout capacity from diameter, embedment, and concrete strength.

GD&T Positional Tolerance Calculator

Calculate total positional tolerance with MMC bonus and virtual condition.

Fits and Tolerances ISO Helper

Estimate hole-shaft limits and resulting clearance/interference for common ISO fit classes.

Fatigue Life Estimator

Estimate fatigue life from simplified S-N curve inputs with mean stress correction.

Weld Distortion Estimator

Estimate weld shrinkage and angular distortion from heat input and section properties.

Sheet Metal Bend Allowance Calculator

Compute bend allowance, outside setback, and bend deduction for sheet-metal bending.

CNC Surface Speed Feed Optimizer

Suggest speed and feed from material presets with practical machine constraints.