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Values of RCF in units of times gravity (×g) for common microcentrifuge rotor radii appear in the following conversion table. As an example, centrifugation of a sample at 5,000 RPM in a microcentrifuge that has a rotor with a radius of 7 cm will deliver a centrifugal force of 1,957 ×g.
Conversion nomograph To find the RCF or RPM value, lay a straight-edge across the known value and rotor size and read the value at the axis crossing point. Printable graph (PDF, 1.15MB)
G-Force/RPM Centrifuge Conversion Calculator. G Force or Relative Centrifugal Force (RCF) is the amount of acceleration to be applied to the sample. It depends on the rotations per minute (RPM) and radius of the rotor, and is relative to the force of Earth’s gravity.
The calculator below will convert g force (RCF) from revolutions per minute (RPM) or vice versa to achieve more precise experimental and quality control results that require centrifugation. Find the g force by entering the RPM and centrifuge rotor radius.
25 cze 2019 · A simple calculation tool to convert centrifuge RPM (rotation speed) value into RCF (relative centrifugation force / g-force) and vice versa
To convert RPM into RCF and vice versa, the rotor radius is needed and is measured from the axis of rotation to the inner bottom of the swing-out cup. The relationship between RPM and RCF is as follows: g = (1.118 X 10-5) R S2 g: relative centrifugal force R: radius of the rotor in centimeters S: speed of the centrifuge in RPM
An average centrifuge rotor radius is 5 – 15 cm. For example, 1750 g requires 4400 rpm with an 8 cm rotor, 4000 rpm with a 10 cm rotor or 3200 rpm with a 15 cm rotor. Table 1: Centrifuge RPMs required given rotor length and the RCF (g) required. Rotor radius.
