Mechanical design 21
Fits and tolerances, beam deflection, sections and shaft strength, materials, threads, bolt torque and springs, motors, pneumatics, linear guides and GD&T for mechanical design
Measure parts from photos and turn them into 2D drawings and 3D models. Open and export DXF, DWG and STEP, assemble parts and plan toolpaths, all in the browser
Mechanical design 13
- Motor Sizing Calculator (Torque & Inertia)Load torque, inertia ratio, acceleration torque, RMS torque and required power for ball-screw, belt and rack drives and rotary tables, with a safety margin
- Pneumatic Cylinder Force & Air Consumption CalculatorPush and pull force from bore and pressure, load ratio, air consumption per stroke and per minute (Nl) and an estimated speed from the supply flow
- GD&T Symbols Explained (Geometric Tolerances)The 14 geometric tolerance symbols from straightness to runout, datum and material condition modifiers (MMC/LMC), tolerance zone pictures and how to read a feature control frame, with search
- Linear Guide & Ball Screw Life CalculatorRating life of ball and roller linear guides (km) and ball screws (revolutions) from the dynamic load rating and applied load, with load factors and conversion to hours from stroke and speed
- Bolt Torque CalculatorTightening torque, preload and ratio to yield from the bolt size, property class (4.6 to 12.9) and friction coefficient, by T = K·F·d and the simplified VDI 2230 method
- Thread Size Chart — pitch, pitch diameter, tap drillPitch, pitch diameter, minor diameter and tap drill size for ISO metric coarse and fine threads, UNC/UNF and pipe threads (G, R/Rc, NPT)
- Compression Spring CalculatorSpring rate, load, shear stress with the Wahl correction, solid height and buckling check from wire diameter, mean diameter, active coils and material
- Shrink Fit Temperature CalculatorHeating temperature for a shrink fit or cooling temperature for an expansion fit from the interference and the thermal expansion coefficients, plus size change by temperature
- Surface Roughness Chart — Ra, Rz, Rmax, N gradesConvert between Ra, Rz, Rmax, N grades and triangle finish marks, see typical roughness by machining process and how to write it on a drawing
- Beam Deflection CalculatorMaximum deflection, bending moment and bending stress of a simply supported, cantilever or fixed-fixed beam under a point or uniformly distributed load, with load, moment and deflection diagrams
- Section Properties CalculatorArea, second moment of area, section modulus and radius of gyration for rectangle, circle, pipe, I/H, channel and angle sections, with a dimension drawing; send the result to the beam and shaft calculators
- Shaft Strength CalculatorCombined bending and torsion stress (von Mises, maximum shear), required shaft diameter, angle of twist and safety factor against yield, with keyseat stress-concentration factors
- Engineering Materials TableTypical density, Young's modulus, yield and tensile strength and thermal expansion of steels, stainless steels, aluminium, copper alloys, cast iron, titanium and plastics; search, compare and send values to the other calculators
Other tools 8
- Tolerance Stack-Up CalculatorAdd up dimensions and tolerances to get worst-case and statistical (RSS) stack-up
- Bolt Circle Calculator (PCD)X and Y coordinates of each hole from the pitch circle diameter and number of holes
- Limits & Fits Calculator (ISO 286)Enter a basic size and tolerance class (H7, g6…) to get the limits and the type of fit
- Sheet Metal Gauge ChartGauge number to thickness in inches and mm for steel, galvanized, stainless and aluminum
- Scale CalculatorConvert between real size and drawing, map or model size at any scale, or find the scale from two lengths
- Gear Ratio CalculatorGear ratio, output speed and torque multiplication from tooth counts, plus spur gear dimensions from module
- Sheet Metal Bend Allowance CalculatorBend allowance, bend deduction and flat length from angle, inside radius, thickness and K-factor
- Bearing Size ChartBore, outside diameter and width of deep-groove ball bearings by number, and how to read a bearing number