ISO 286 tolerances and fits
Free ISO 286 tolerance calculator: deviations, limit diameters, clearance and interference for fits up to 500 mm.
Open the toolSheet metal flat pattern and K-factor
Calculate the flat length of a bent sheet with the K-factor: bend deduction, bend allowance and K-factor estimate according to DIN 6935.
Open the toolHydraulic system pressure
Pressure calculator for hydraulic systems: force and speed of a cylinder, required pressure and pressure drops.
Open the toolStatic and fatigue check of a shaft
Static and fatigue verification of a shaft with Goodman, Marin and von Mises, also from a STEP file: diameters, fillets and Kt from the model.
Open the toolPower, torque and motor selection
Calculate the power, torque and speed of a drive and choose the motor: IEC frame size, number of poles and reduction ratio.
Open the toolPulleys and gears
Calculator for belt drives and gears: ratio, speed, belt length, wrap angle and centre distance.
Open the toolLighting calculation
Lighting calculation with the lumen method: number of LED luminaires, average illuminance in lux and installed power.
Open the toolUnit and physical quantity converter
Free converter of units and physical quantities: mechanics, fluids, heat, electricity, magnetism and radiation, with over 350 units.
Open the toolBearing selection and verification
Online bearing life calculator to ISO 281 (method used by SKF): L10h and Lnm with aISO, viscosity and static safety factor. Free trial, result in seconds.
Open the toolPermissible residual unbalance
Free calculator of the permissible residual unbalance of a rigid rotor to ISO 21940-11: G grade, split over the two planes and correction mass.
Open the toolRoller chain drive ISO 606
Free calculator for ISO 606 roller chain drives: number of links, actual centre distance, speed, chain pull and static safety.
Open the toolOrifice plate flow ISO 5167
Free calculator of the flow rate of a liquid measured with an orifice plate to ISO 5167-2: discharge coefficient, Reynolds number and pressure loss.
Open the toolDisc springs
Free calculator for disc springs to EN 16984 (formerly DIN 2092): force, deflection, stresses and stacks in series and in parallel.
Open the toolBolt tightening torque
Free calculator of tightening torque and preload for metric bolts from M6 to M30, classes 8.8, 10.9 and 12.9, using the VDI 2230 method.
Open the toolScrew conveyor
Free calculator for screw conveyors: capacity in t/h and m³/h, shaft power and motor power to ISO 7119.
Open the toolLine category EN 15528
Professional calculator on subscription: mass per axle, mass per metre, EN 15528 line category and maximum payload for each category.
Open the toolSafety against derailment
Professional calculator on subscription: Y/Q limit with the Nadal criterion and wheel unloading ΔQ/Q0 on twisted track, quantities of EN 14363.
Open the toolOverturning of a track machine
Professional calculator on subscription: overturning stability of a track machine on canted track, with overhanging load, overhanging structures and wind.
Open the toolWeighing and wheel loads
Professional calculator on subscription: distribution of loads on axles and wheels from the centre of gravity and check of weighing tolerances on axle, wheel and mass.
Open the toolTractive effort
Professional calculator on subscription: tractive effort required by gradient, curve and acceleration, adhesion check and motor power.
Open the toolSuspension springs
Professional calculator on subscription: rate, deflections empty and loaded, corrected stress, reserve before solid and natural frequency of a suspension spring.
Open the toolBraking
Professional calculator on subscription: braking force, deceleration, stopping distance, adhesion used, energy dissipated and holding capacity of the parking brake.
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