The AS18-5 Rotor: A Fixed-Angle Consumable for Two Benchtop Centrifuge Models

AS18-5 (round bottom)（19400073）

A rotor listing looks simple until it is read as a set of constraints. The AS18-5 holds eighteen 5 mL round-bottom tubes and is machined from aluminum alloy, a common choice where weight and heat transfer matter.

The stated maximum speed is 15,000 rpm, with a maximum relative centrifugal force of 21,380 × g. Those two figures describe the rotor’s envelope, not a recommended operating point for every sample.

Biosealing is listed as present, which matters when aerosols or biohazardous material are handled and containment depends on the rotor rather than the chamber alone.

The round-bottom format is a specific fit. Laboratories standardized on conical or skirted tubes will find this rotor answers a different tube inventory.

Compatibility is claimed for the D3024 and D1524R. Buyers should confirm that the machine in hand is the exact variant named, since centrifuge families often span several drive and lid configurations.

The listing carries a model number, 19400073, and little else. Rotor service life, derating after autoclaving, and the rotor-specific maximum for each tube type are not stated here and belong in the manufacturer’s documentation.

A rotor is only as useful as the paperwork that accompanies it, because the number on the machine is never the whole specification.

Why it matters:
Rotors are model-specific and cannot be substituted casually. Before ordering, verify the exact centrifuge variant, the tube geometry, and whether the stated g-force applies to the tubes actually in use.

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