12 × 5 mL Angle Rotor

The Z326-1205 is a 12-position fixed-angle rotor for 5 mL tubes in the Hermle Z326 / Z216 cross-compatible accessory catalog. Engineered around the 5 mL Vacutainer-style clinical-research tube format, this rotor fits into the workflow gap between microcentrifuge rotors (1.5/2.0 mL) and 15 mL clinical rotors. At 14,500 rpm / 19,978 × g, the Z326-1205 delivers high-RCF pelleting in 5 mL format — appropriate for clinical-research workflows that batch 5 mL Vacutainer samples, microfluidic-prep workflows in 5 mL aliquots, and any 5 mL workflow that benefits from 12-tube parallel throughput.

Key Specifications

Compatibility & Configuration

Chassis compatibility — Z326 family (and Z216 cross-compatible). The Z326-1205 SKU is cross-listed in the Z216 brochure under the Z216-1205 designation — Hermle's accessory-table convention for rotors that fit multiple chassis bodies in the benchtop family. The chassis's RFID rotor-identification reads the rotor at insertion and applies the rotor-rated speed cap.

12-position 5 mL layout. The rotor body has 12 dedicated positions arranged radially. The 8.5 cm max radius and 45° (typical angle for this rotor class) geometry are tuned to the 5 mL tube inertial profile.

Tube format compatibility. Standard 5 mL clinical and research tubes fit the 12.6 mm OD position; Vacutainer-style 5 mL tubes (13.5 mm OD typical) fit with the standard adapter geometry. Confirm tube OD against the rotor's position spec at order if your workflow uses non-standard 5 mL formats.

Application Profile

Clinical-research 5 mL Vacutainer batch processing. The 12-position throughput supports clinical-research labs that batch 5 mL primary samples — small enough to be the workflow's "primary" rotor for 5 mL work, large enough to handle a typical phlebotomy-batch within 1–2 cycles.

5 mL serum/plasma preparation at high RCF. The 19,978 × g ceiling is meaningfully higher than typical low-speed clinical centrifuges deliver — useful for protocols specifying extended high-RCF separation for clean serum/plasma boundaries.

Microfluidic-prep workflows in 5 mL aliquots. When the upstream workflow produces 5 mL aliquots that need high-RCF clarification before downstream microfluidic injection, the Z326-1205 covers it at 12-tube throughput.

Cell-pellet recovery at small volume. 5 mL cell-suspension pelleting (mammalian, bacterial, yeast) at high RCF — the angle geometry produces compact pellets in the 5 mL tube wall.

Method development comparing 5 mL vs 1.5/2.0 mL workflow scaling. When a workflow is being characterized at 1.5/2.0 mL microtube scale and then scaled to 5 mL for downstream processing, the Z326-1205 provides the 5 mL high-RCF capability for the scale-up validation.

Educational and teaching laboratories running 5 mL clinical-research protocols where 12-tube parallel processing matches batch sizes.

Loading & Balance

12-tube symmetric loading. Opposite-pair distribution (positions 1+7, 2+8, etc.); pre-balance pairs by weight before insertion. At 14,500 rpm with 12 positions, balance precision matters — small mass excursions translate to substantial inertial asymmetry.

Tube fit verification. Confirm 5 mL tube OD against the rotor's position spec — Vacutainer 5 mL (13.5 mm) and clinical-research 5 mL formats typically fit; non-standard 5 mL tube formats may require adapters or may not fit at all.

Selectable accel/decel. Chassis's 10 profiles apply; the unbraked decel (320 sec extended profile) supports loose-pellet preservation for cell-suspension workflows.

Ordering & Configuration

Z326-1205 ships as the rotor body alone. Specialty tube adapters are sold separately if needed for non-standard 5 mL formats.

Confirm at quote: chassis pairing (Z326 family — Z216 cross-compatibility may apply per Hermle accessory-catalog conventions; verify at order), tube format (confirm 5 mL OD against rotor position spec), training, and lead time.

Warranty: 5-Year Hermle warranty (3 years full + 2 years drivetrain) on the rotor body. Balance validation through the Hermle service network.

5 mL rotor selection within the Hermle catalog: the Z326-1205 (this product, 12 × 5 mL at 19,978 × g) is the dedicated 5 mL workflow rotor. For mixed-format workflows that need both 5 mL and other tube formats on the same rotor body, the deep adapter libraries on the Z327-200 swing-out (with Z327-200-A57 / -A5F 5 mL adapters) or Z306-100 swing-out provide flexibility at the cost of fewer 5 mL-dedicated positions per cycle.