6 × 50 mL Round Rotor (High Speed)

The Z326-0650-HS is a 6-position fixed-angle High Speed rotor for 50 mL round-bottom tubes in the Hermle Z326 / Z32-HK rotor catalog. The "HS" suffix denotes the High Speed designation — at 16,000 rpm / 24,039 × g per the shared accessory brochure, this rotor sits in the higher-RCF tier of the Z326 50 mL rotor family. Round-bottom 50 mL tubes are the format target; conical 50 mL fits via the Z326-50-A15R adapter (with a noted constraint that the conical configuration runs without rotor lid). For workflows that need high-RCF pelleting in 50 mL round-bottom format at 6-tube throughput per cycle, this is the Z326-family pick.

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 16,000 rpm cap automatically at insertion.

50 mL round-bottom direct fit. Standard 50 mL round-bottom tubes (Falcon-style and other 29 mm OD round-bottom formats) fit the rotor's 29 mm tube ø directly without adapter.

Adapter library for non-standard tube formats:

• Z326-50-A30 — 1 × 30 mL adapter; 25 mm tube ø
• Z326-50-B15R — 1 × 15 mL round-bottom; 17 mm tube ø
• Z326-50-A15R — 1 × 15 mL conical (asterisked in brochure: *only without rotor lid* — when using this conical adapter, the rotor must run without its lid attached)

Speed-spec discrepancy note. The 2026 universe description for this SKU says "6 x 50ml Round rotor (12,000 rpm)" — but the Z032-HK shared accessory brochure spec for Z326-0650-HS lists Max speed 16,000 rpm and Max RCF 24,039 × g. The brochure is authoritative; the 12,000 rpm in the universe description may be a sales-data entry artifact or may reference an older variant. Confirm at order against the customer's expected RCF target.

Application Profile

6 × 50 mL high-RCF round-bottom workflows at 24,039 × g — bacterial cell-pellet recovery from 50 mL fermentation aliquots, post-lysis debris clarification, environmental sample particulate clearance.

High-throughput protein precipitation. 6-tube parallel TCA / acetone / ammonium-sulfate precipitations at 24,000 × g in 50 mL round-bottom format.

Cold-chain protein pelleting on refrigerated chassis — when paired with Z326-K or Z032-HK, the rotor's 1 °C temperature-at-max-speed spec supports 4 °C cold-chain protein workflows.

6 × 30 mL workflows via Z326-50-A30 adapter — when the workflow is 30 mL aliquots and 6-tube throughput at high RCF is the target.

6 × 15 mL workflows via Z326-50-B15R or Z326-50-A15R adapters — small-volume high-RCF work; note the conical-adapter no-rotor-lid constraint.

Method development. Adjustable accel/decel including unbraked (1,087 sec extended profile) supports loose-pellet preservation and density-gradient work.

Loading & Balance

6-tube symmetric loading. Opposite pairs (1+4, 2+5, 3+6); pre-balance each pair by weight before insertion.

Adapter consistency across all 6 positions when using adapters.

Rotor lid constraint — when using the Z326-50-A15R conical adapter, the rotor must run without its lid attached per the brochure asterisk. Other tube formats run with the lid on for chamber sealing.

Selectable accel/decel. Chassis's 10 profiles apply; 1,087 sec extended decel is available for loose-pellet preservation.

Ordering & Configuration

Z326-0650-HS 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), expected operating RCF (resolves the 12,000 vs 16,000 rpm spec question against your workflow target), adapter inventory needed, and whether the conical-adapter no-lid constraint is workflow-compatible.

Warranty: 5-Year Hermle warranty (3 years full + 2 years drivetrain) on the rotor body. Includes balance validation through the Hermle service network — recommended at install plus annually.

Z326-0650-HS vs other Z326 50 mL rotors: the HS (High Speed) variant (this product) delivers maximum RCF for the 50 mL workflow at 6-tube throughput. For lower-speed work where the high RCF isn't needed, the Z326-0650-LS (Low Speed variant) is the lower-cost alternative. For 6 × 85 mL high-RCF work at one volume class up, see Z326-0685 or Z326-0685-25.