6 × 50 mL Low Speed Angle Rotor

The Z326-0650-LS is the Low Speed 6-position angle rotor for 50 mL tubes in the Hermle Z326 / Z32-HK rotor catalog — sister to the High Speed Z326-0650-HS variant. The "LS" suffix denotes the Low Speed designation: at 4,500 rpm / 2,716 × g, this rotor sits at the lower end of the Z326 50 mL rotor family RCF range. For workflows where high RCF isn't required (routine cell-pellet recovery, primary clinical separation, low-speed serum/plasma work), the LS variant is the cost-effective choice — $1,434 less than the HS variant ($1,610 vs $3,044) for the same 50 mL conical capacity at 6-tube throughput.

Key Specifications

Compatibility & Configuration

Chassis compatibility — Z326 family + cross-compatible Z32-HK per the shared Hermle accessory catalog. RFID-tagged; chassis applies the rotor's rated 4,500 rpm cap automatically at insertion — operators cannot accidentally over-spin the LS rotor on a chassis whose maximum exceeds the LS rotor's rating.

50 mL conical direct fit. Standard 50 mL Falcon-style conical tubes fit the rotor directly. Round-bottom 50 mL also fits (29 mm OD typical). The 63 mm max loading height accommodates standard tube depth in the bucket position.

310 g max loading weight per position. Sufficient for 50 mL aqueous samples (≤50 g sample + ~10 g tube + adapter) — well within margin for routine clinical and research workflows.

Adapter library for smaller-volume workflows (sold separately):

• Z206-50-A15 — 15 mL format adapter
• Z206-50-A57 — 5/7 mL Vacutainer adapter base
• Z206-50-A5C — 5 mL tube cushion (6/pk) — nests inside Z206-50-A57 to step down 7 mL adapter to 5 mL tube envelope

The Z206-prefix in the adapters indicates cross-rotor adapter compatibility with the older Z206-A clinical centrifuge family.

Application Profile

Routine 6 × 50 mL clinical separation — serum/plasma separation from 50 mL primary blood-collection tubes at 1,800–2,716 × g. Standard clinical-laboratory workflow that doesn't need the higher RCF of the HS variant.

Cell-pellet recovery from 50 mL conical — mammalian, bacterial, and yeast cell-suspension pelleting at routine clinical RCF. The 2,716 × g ceiling covers most cell-pelleting protocols (mammalian cells pellet at 300–500 × g; bacteria at 1,500–3,000 × g; both within range).

Microbiology batch culture handling — 50 mL bacterial-culture aliquots for sub-culturing or downstream extraction prep at 6-tube parallel throughput.

Educational and teaching labs where 50 mL workflow throughput at 6 tubes per cycle is the requirement and the lower price point matters for budget-constrained programs.

Low-speed protocol matching. Some published clinical and research protocols specify maximum speed below 5,000 rpm — the LS rotor naturally matches these specs without requiring operators to under-spin a high-speed rotor.

5/7 mL Vacutainer batch processing via Z206-50-A57 adapter — when the workflow extends to clinical Vacutainer formats, the same rotor body covers it.

Loading & Balance

6-tube symmetric loading. Pair opposite tubes by weight (positions 1+4, 2+5, 3+6); pre-balance pairs before insertion.

Adapter consistency across all 6 positions when using adapters.

Selectable accel/decel. The chassis's 10 profiles apply; the unbraked decel (490 sec extended profile) supports loose-pellet preservation for cell-suspension workflows where braked deceleration would disturb settled cells.

Ordering & Configuration

Z326-0650-LS ships as the rotor body alone. Adapters and any specialty tube formats are sold separately.

Confirm at quote: chassis pairing (Z326 family or Z032-HK), adapter inventory needed for smaller-volume tube formats, 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.

Z326-0650-LS vs Z326-0650-HS selection: the Z326-0650-LS (this product, 4,500 rpm / 2,716 × g) is the lower-cost alternative for routine clinical and cell-pelleting workflows that don't need the HS variant's higher RCF. The Z326-0650-HS (16,000 rpm / 24,039 × g) is the high-RCF alternative for protein-pelleting and high-RCF clarification work — meaningfully higher RCF at $1,434 higher price. Don't over-spec to HS when the workflow is routine clinical-grade — the LS variant covers it.