The Z326-4420 is the highest-position-count microcentrifuge rotor in the Hermle Z326 / Z32-HK rotor catalog — 44 × 1.5/2.0 mL microtubes per cycle at 15,000 rpm / 21,379 × g. Engineered with a compound 32°/55° angle geometry for efficient pelleting across the densely packed positions, this rotor delivers production-scale throughput for batch-format molecular biology, NGS prep, and microbiome workflows where 44-tube parallel processing significantly compresses per-batch processing time.
Key Specifications
| SKU | Z326-4420 |
| Type | Fixed-angle rotor — 44 position |
| Tube capacity | 1.5 / 2.0 mL microtubes (or 0.5 / 0.2 mL PCR via adapter) |
| Tube count | 44 |
| Angle | 32° / 55° compound geometry |
| Compatible chassis | Z326 family + cross-compatible Z32-HK |
| Max. operating speed | 15,000 rpm |
| Max. RCF at operating speed | 21,379 × g |
| Max. radius | 8.5 cm |
| Max. tube ø | 11 mm |
| Deceleration | 23 / 477 sec (standard / extended-unbraked) |
| Temperature at max. speed (refrigerated chassis) | −6 °C |
| Adapters (sold separately) | C1008-A5-6 (0.5 mL, 8 mm) / C1008-A2-6 (0.4/0.2 mL PCR, 6 mm) |
Compatibility & Configuration
Chassis compatibility — Z326 family + cross-compatible Z32-HK per shared accessory catalog. RFID-tagged; chassis applies the rotor's rated speed cap automatically.
Compound 32°/55° angle. The rotor uses a compound angle geometry — different angle facets across the 44 positions for optimal pelleting given the dense position layout. This is engineered for the throughput-vs-pelleting-quality trade-off: 44 positions in a single rotor body without sacrificing pelleting efficiency.
Direct fit for 1.5/2.0 mL microtubes. Standard Eppendorf-style 11 mm OD tubes fit directly. Smaller-volume work via the C1008-A5-6 (0.5 mL) and C1008-A2-6 (0.2 mL PCR) adapters.
Application Profile
Production-scale microbiome / 16S rRNA prep — 44-sample-per-cycle high-RCF pelleting accelerates batch microbiome workflows where the post-lysis prep step is the throughput bottleneck.
NGS library-prep batch QC — when batch-prepping 40+ libraries per QC cycle, the 44-position rotor handles the high-RCF cleanup steps in single cycles.
Cold-chain microtube workflows on Z326-K / Z032-HK — −6 °C temperature-at-max-speed for cold-stable protein and RNA workflows.
High-throughput protein precipitation at 21,379 × g across 44 aliquots per cycle.
Ordering & Configuration
44-tube symmetric loading. Distribute tubes symmetrically; the chassis's RFID-aware imbalance shut-off catches asymmetric loads. With 44 positions, balance precision matters.
Z326-4420 ships as the rotor body alone. Adapters sold separately.
Confirm chassis pairing, adapter quantity, training, lead time at quote.
Warranty: 5-Year Hermle warranty (3 years full + 2 years drivetrain) on the rotor body.
Z326 microcentrifuge rotor selection by throughput/RCF:
- Z326-2420H — 24 positions / 38,007 × g / hermetically sealed
- Z326-3020H — 30 positions / 30,368 × g / hermetically sealed
- Z326-4420 (this product) — 44 positions / 21,379 × g / open
Pick the throughput-vs-RCF combination that matches the workflow.
