en

number of revolutions per unit of time

1

Terminological databases

EKI terminibaas Esterm

ID 700648 Last modified 08.03.2026
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Domain general mechanics - behaviour of solid bodiesmachine tools
rotational speed preferred
velocity of rotation
number of revolutions per unit of time
revolutions per unit of time
rotational frequency
  • pöörleva keha pöörete arv ajaühikus. Rahvusv. mõõtühikute süsteemis (SI) on p-e ühik pöördsekund (s-¹); kasut. ka mittesüsteemseid ühikuid pööre minutis (p/min) ja pööre sekundis (p/s).
  • a quantity proportional to the angular velocity and measured in revolutions per unit of time (generally: per minute, i.e.rev/min, r.p.m.)
  • grandeur proportionnelle a la vitesse angulaire et mesurée en tours par unité de temps (en général: par minute, tr/mn)
pöörlemissagedus
Usage examples
  • Töövahendi pöörlemissageduse muutumisest lähtuvad ohud Kui seade on ette nähtud töötamiseks erinevatel töörežiimidel (näiteks erinevatel kiirustel või võimsustel), peab selle projekteerima ja valmistama nii, et režiimide valik ja muutmine oleks ohutu ja usaldusväärne.
rotational speed preferred
Usage examples
  • Risks relating to variations in the rotational speed of tools. When the machine is designed to perform operations under different conditions of use (e.g. different speeds or energy supply), it must be designed and constructed in such a way that selection and adjustment of these conditions can be carried out safely and reliably.
velocity of rotation
number of revolutions per unit of time
revolutions per unit of time
rotational frequency
Drehzahl

Metroloogia terminibaas

ID 572673 Last modified 26.11.2025
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Domain Standardisation - Metrology
pöörlemissagedus preferred
pöörete arv former
pöörlemiskiirus deprecated
rotational frequency preferred
rate of rotation
speed frequency
revolutions per unit of time
number of revolutions per unit of time
rotation speed former
speed of rotation former
  • täispöörete arv ajaühiku jooksul
  • nurkkiirus ω jagatud nurgaga 2π, mille tulemusena n = |ω|/2π
  • magnitude of the angular velocity ω divided by the angle 2π, thus n = |ω|/2π
pöörlemissagedus preferred
Usage examples
  • Pöörlemissagedust saab formuleerida ka pöörete arvu N hetkelise muutumise kiirusena aja suhtes, t: n = dN/dt (vastavalt rahvusvahelisele suuruste süsteemile).
Good to know
  • Sarnaselt tavalisele perioodile on pöörlemissageduse vastastikune väärtus pöörlemisperiood, T = ν−1 = n−1 , aja mõõtmega (SI ühik sekund).
pöörete arv former
pöörlemiskiirus deprecated
Good to know
  • Sagedus ei ole kiirus.
rotational frequency preferred
Usage examples
  • Rotational frequency can also be formulated as the instantaneous rate of change of the number of rotations, N, with respect to time, t: n = dN/dt (as per International System of Quantities).
Good to know
  • Similar to ordinary period, the reciprocal of rotational frequency is the rotation period or period of rotation, T = ν−1 = n−1 , with dimension of time (SI unit seconds).
rate of rotation
speed frequency
revolutions per unit of time
number of revolutions per unit of time
rotation speed former
speed of rotation former
velocity of rotation former

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