What the sketches show
Each sketch is a technical line drawing of the component. It is labelled with formula symbols only, so one drawing serves all three languages. Where your input changes the design, the sketch changes with it:
- Moment of inertia: seven geometries from solid cylinder to screw.
- Ball screw: four bearing arrangements. The nut sits in its least favourable position, the axial force pushes towards the fixed bearing.
- Bearing life: deep groove ball bearing or cylindrical roller bearing, each with a longitudinal section (upper half).
- Gear type selector: a symbol for the recommended gear type.
The matching symbol lights up
In every calculator with formula symbols, as soon as you click into an input field, hover over it or tap a result line, the sketch highlights the matching formula symbol in TEA orange; everything else fades back. In the ball screw calculator the whole screw lights up for speed n; in the gear geometry calculator module and number of teeth z₁ point to the pitch circle d.
On a phone, the sketch appears as a small card directly above the field you are typing in – no more scrolling back up.
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See all calculatorsFollowing the rules of technical drawing
Line types and sections follow DIN EN ISO 128. The gears in the gear geometry calculator have true involute flanks, standard teeth with the basic rack profile to DIN 867. Threads are right-handed and drawn with the matching direction of rotation. In the rack-and-pinion drive the feed per revolution s_U is drawn to scale: exactly π · d₀.
The sketches have been reviewed technically. Please let us know about any errors.
In all engineering calculators
The sketches appear in all twelve engineering calculators: torque, gearbox ratio, efficiency, moment of inertia, gear geometry, gear type, rack and pinion, ball screw, screw jack, linear guide, bearing life and magnetic coupling. As always free of charge and without registration.