P = T · ω
Torque, power & speed
Calculate one unknown from two values, with explicit units.
Open tool ↗YOUR DIGITAL WORKBENCH
The engineeringtoolkit.
From fit to drive. A direct answer, with the calculation alongside it.
i = n₁ / n₂
Transmission ratio
Output speed and torque with adjustable efficiency.
Open tool ↗ISO 286
Fits
Preferred fits H/JS/G/F/D up to Ø 3150 mm, with clearance and interference per band.
Open tool ↗ISO 2768
General tolerances
Title-block default for linear and angular tolerances: f/m/c/v and H/K/L.
Open tool ↗DIN 6885
Keyway tolerances
Key size and groove depth t₁/t₂ per shaft diameter, with width tolerance.
Open tool ↗SKF · ISO 286
Bearing fits
Deep groove ball bearings: fixed/floating side, SKF classes up to Ø 50 mm.
Open tool ↗DIN 471 / 472
Circlip groove
Groove diameter, width and depth on shaft or in bore, up to Ø 100 mm.
Open tool ↗ISO 273 · VDI 2230
Fasteners
M3–M24: clearance holes, wrench sizes and tightening torque 8.8 / 10.9 / 12.9.
Open tool ↗ISO 3601-1 sizes · gland estimate
O-ring groove
ISO cords 1.80–7.00 mm: groove depth and width, radial and axial.
Open tool ↗Plaatwerk
Sheet metal edge guidelines
Bend radius, minimum flange length, die width and Z-bend for sheet metal.
Open tool ↗SI · imperial
Units
Inch ↔ mm, °C ↔ K, dm³ ↔ L, lbf ↔ N, psi ↔ bar.
Open tool ↗P = F·v
Motor sizing
Roller conveyor, belt, incline or hoist: speed, force, torque, power and IEC step.
Open tool ↗ISO 15552 · 6432
Pneumatic cylinder
F = p·A, double-acting. Determine the ISO bore for a load at 6 bar.
Open tool ↗Euler
Buckling calculation
Euler buckling of a slender column: F_cr, critical stress and slenderness λ.
Open tool ↗F_KR · F_S,max
Bolt load and clamp force
Simplified model: residual clamp force F_KR and maximum bolt force F_S,max. Not a complete VDI 2230 verification.
Open tool ↗ISO 281
Bearing life (L10 / L10h)
Basic rating life L10/L10h, reliability factor a1, and static safety S0 = C0/P0.
Open tool ↗Puntlast · UDL
Beam deflection
Deflection of a beam under a point load or uniformly distributed load: simply supported or cantilever.
Open tool ↗τ = 16T/(πd³)
Shaft diameter under torsion
Minimum shaft diameter from torque and allowable shear stress; optionally check a chosen diameter.
Open tool ↗Bronnen
CAD libraries
3D models, components, sheet metal and reference resources.
Open tool ↗SolidWorks · Inventor
Macro library
Copy-ready VBA macros: STEP export, batch save, show properties.
Open tool ↗Favorites stay in this browser. Search and filters are shareable via the URL. Also see the reference tables ↗