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A centrifuge is a lab device that spins samples at high speed to separate materials by density. Denser material moves toward the outside or bottom of the tube, while lighter material stays closer to the top. Clinical and research labs use centrifuges for blood, urine, cell, and chemical samples. The exact settings depend on the sample type, tube, rotor, and test being performed.
read more about centrifuge ...A centrifuge uses rapid rotation to create relative centrifugal force, also called RCF or g-force. That force pulls heavier particles away from lighter liquid or suspended material. Speed, time, temperature, rotor type, and tube angle can change the result. Labs should follow the test method and equipment manual rather than guessing settings.
Centrifuges are used to separate blood components, prepare urine sediment, collect cells, clarify liquids, and process lab specimens. A blood sample can be spun to separate plasma or serum from blood cells. Research labs also use centrifuges to separate proteins, DNA, bacteria, or cell fragments. The sample container must match the speed, chemical exposure, and temperature of the run.
Opposite tubes should be balanced by mass before the run starts. An unbalanced load can cause vibration, noise, sample spills, tube breakage, or rotor damage. The lid should stay closed until the rotor has completely stopped. If a tube breaks, the lab should follow its spill and decontamination procedure before reopening or cleaning the unit.
Operators should inspect tubes, caps, rotors, buckets, and seals before use. Cracked tubes, worn rotor parts, or loose caps can create leaks or aerosols. The chamber should be cleaned after spills and kept free of broken glass or sample residue. Rotors also need routine inspection and retirement based on the manufacturer's limits.
Balanced tubes keep the rotor spinning evenly. Poor balance can cause vibration, damage the machine, break tubes, or create a sample spill.
No. The lid should stay closed until the rotor has fully stopped. Opening the unit too early can expose you to moving parts, broken tubes, or aerosols.
RPM means revolutions per minute, or how fast the rotor spins. RCF measures the force applied to the sample, which also depends on the rotor radius.
Tubes can break from poor balance, overfilling, wrong tube type, high speed, aging plastic, or a damaged rotor. Always match the tube to the sample, rotor, and run settings.
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Swinging Bucket Centrifuge Safety Scenario. Centers for Disease Control and Prevention. https://reach.cdc.gov/sites/default/files/job-aids-resources/Centrifuge-SwingingBucket-Text-Version-UPDATED.pdf. Date Accessed May 26, 2026.
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