The Z216-4420 is the highest-position-count microtube rotor in the Z216 catalog — 44 × 1.5/2.0 mL microtubes per cycle, engineered specifically for the Hermle Z216 chassis family. At 14,000 rpm / 18,624 × g, this rotor delivers production-scale batch throughput on the Z216-M and Z216-MK chassis where 44-tube parallel processing significantly compresses per-batch time. Per the Z216 catalog, this rotor is "for Z216 series only" — not interchangeable with the similarly named Z326-4420 (Z326-chassis-engineered).
Key Specifications
| SKU | Z216-4420 |
| Type | Fixed-angle rotor — 44 position |
| Tube capacity | 1.5 / 2.0 mL microtubes |
| Tube count | 44 |
| Angle | 45° |
| Compatible chassis | Z216 series only (Z216-M, Z216-MK, and -E voltage variants) |
| Max. operating speed | 14,000 rpm |
| Max. RCF at operating speed | 18,624 × g |
Compatibility & Configuration
Chassis compatibility — Z216 series only. This rotor is engineered for the Z216-M and Z216-MK chassis spindle and chamber geometry. Not interchangeable with Z326-4420 (which fits the Z326 chassis at higher RPM/RCF), or with Z207, Z287, Z167, or other Hermle chassis families.
RFID-tagged. Chassis applies the rotor's rated 14,000 rpm cap automatically at insertion.
44-position layout. Standard Eppendorf-style 11 mm OD microtubes fit the rotor's position layout. The 45° angle and dense position layout are engineered for batch microtube workflows where per-cycle throughput is the operative spec.
Z216-4420 vs Z326-4420. Both SKUs share the "4420" suffix indicating "44 × 1.5/2.0 mL" rotor type, but they are different physical rotors for different chassis. Z216-4420 caps at 14,000 rpm / 18,624 × g (Z216 chassis-rated). Z326-4420 caps at 15,000 rpm / 21,379 × g (Z326 chassis-rated). Don't cross-order — confirm chassis at order.
Application Profile
Production-scale batch microtube prep on the Z216 chassis — 44-sample-per-cycle pelleting for nucleic-acid prep, NGS library QC, microbiome workflows, and protein-precipitation batches.
Cold-chain microtube workflows on Z216-MK — combines 44-tube parallel throughput with refrigerated chamber temperature control.
High-throughput protein precipitation at 18,624 × g across 44 aliquots per cycle — TCA, acetone, and ammonium-sulfate workflows.
Multi-user shared cores running batch microtube prep where individual cycle throughput matters for shared-bench scheduling.
Educational labs running batch student-sample prep at high per-cycle counts.
Ordering & Configuration
44-tube symmetric loading. Distribute tubes symmetrically; chassis's RFID-aware imbalance shut-off catches asymmetric loads. With 44 positions, balance precision matters significantly — small mass excursions translate to substantial inertial asymmetry.
Z216-4420 ships as the rotor body alone. Smaller-volume adapters sold separately if supported by the rotor configuration.
Confirm Z216 chassis pairing, training, lead time at quote.
Warranty: 5-Year Hermle warranty (3 years full + 2 years drivetrain) on the rotor body.
Z216 microtube rotor selection by throughput: the Z216-4420 (this product, 44 positions) is the maximum-throughput pick on the Z216 chassis. For smaller batch sizes, the Z216-2420 (24 positions) and Z216-2420H (24 positions hermetically sealed) are the lower-throughput alternatives. For multi-format workflows combining microtubes and PCR strips, the Z216-2420S COMBI-Rotor handles both formats simultaneously.
