The Z446-750-A30 is an 8-position 30 mL tube insert for the Hermle Z446-750-BUK round bucket on the Z446-750-AC 4-place swing-out rotor (Z446 / Z446-K chassis) — sold as a 2-pack. Each insert holds 8 × 30 mL tubes; the 4-bucket rotor configuration takes 2 packs (4 inserts) for full symmetric loading, delivering 32 × 30 mL tubes per cycle in swing-out geometry. The 30 mL format sits in the intermediate volume range — useful for bioprocess intermediates, mid-volume aliquot prep, and clinical-research workflows specifying 30 mL working volume; 32 parallel preps per cycle delivers institutional intermediate-volume throughput on the swing-out platform.
Key Specifications
| SKU | Z446-750-A30 |
| Type | Tube insert — 8 × 30 mL |
| Pack quantity | 2 inserts per SKU (full 4-bucket configuration takes 2 units = 4 inserts) |
| Per-insert capacity | 8 × 30 mL tubes |
| Per-cycle throughput (full configuration) | 32 × 30 mL per cycle |
| Tube format | 30 mL conical or round (26 mm OD, 75–100 mm length range) |
| Compatible bucket | Z446-750-BUK (round bucket; with Z446-750-LID PC-Screw cap for sealable mode) |
| Compatible rotor | Z446-750-AC (4-place swing-out rotor body) |
| Compatible chassis | Z446, Z446-K (refrigerated), and -E voltage variants |
| Max. operating speed (with insert + tubes) | Per Z446-750-AC spec — 4,000/4,500 rpm at 3,434–4,346 × g maximum |
| Max. radius | 19.2 cm (0.3 cm radius correction with this insert) |
| Temperature at max speed (refrigerated chassis) | 4 °C |
| Geometry | Swing-out (0–90°) — flat sediment surface |
| List price | $572 (2-pack) |
Compatibility & When to Order This SKU
Insert pairing — Z446-750-BUK round bucket only. Order this SKU when:
- Adding 30 mL tube workflow to an existing Z446 / Z446-K + Z446-750 install — order 2 units for full 4-bucket symmetric loading (32 tubes/cycle).
- Bioprocess intermediate prep at 30 mL at scale — vaccine-development and bioprocess workflows that batch 30 mL tubes for intermediate concentration steps at institutional throughput.
- Cold-chain 30 mL workflows on the Z446-K refrigerated chassis at 4 °C max-speed temperature.
- Optional BSL-2 + workflow with the Z446-750-LID engaged.
- Replacement inserts if a current set is damaged or worn.
Application Profile
4-bucket symmetric loading. All 4 buckets must use matching A30 inserts for symmetric balance.
Per-insert symmetric loading. Within each insert, the 8 tubes should be balanced symmetrically — pair tubes by mass.
30 mL intermediate-volume range. The 30 mL format sits between 15 mL conical and 50 mL conical workflows; useful when the protocol specifies the 30 mL working volume for bioprocess intermediates, certain clinical-research aliquots, or chemical-prep workflows.
Optional hermetic seal via LID. When combined with the Z446-750-LID, the bucket creates a hermetic envelope for BSL-2 + 30 mL workflows.
Speed mode toggle. The Z446-750 rotor supports two speed modes (4,000 rpm / 4,500 rpm) selectable per chassis power configuration.
Design Architecture
Cold-chain 30 mL bioprocess intermediate prep at scale — vaccine-development and bioprocess workflows that batch 32 × 30 mL tubes per cycle at refrigerated temperature.
Mid-volume cell harvest in 30 mL at scale — when cell-culture workflows batch 30 mL suspension cultures at institutional throughput.
Cold-chain 30 mL protein-prep workflows — TCA, ammonium-sulfate, organic-precipitation in 30 mL working volume on the high-throughput swing-out platform.
Mid-volume aliquot prep at scale — pooled patient sample workflows or bioassay intermediate workflows in 30 mL at institutional throughput.
Environmental and analytical sample prep at 30 mL — when sample-prep workflows batch 30 mL tubes at institutional volume.
Cross-format Z446-K core facilities — labs running 30 mL alongside other Z446-750 insert formats benefit from the cross-format insert family.
Ordering & Configuration
4-bucket symmetric loading. All 4 buckets must use matching A30 inserts. Mixed-bucket configurations produce mass asymmetry.
Tube cap confirmation. All 30 mL tubes must be securely capped before spinning at 4,500 rpm.
Optional hermetic-seal engagement. When using the Z446-750-LID for biosafety workflows, confirm the lid is fully threaded onto each bucket before each spin.
Z446-750-A30 ships as 2 inserts. 30 mL tubes are operator-supplied (commodity 30 mL conical or round-bottom formats from major commercial suppliers). The Z446-750-BUK bucket and (optional) Z446-750-LID are sold separately.
Confirm at quote: bucket pairing (Z446-750-BUK in inventory; Z446-750-LID if biosafety required), chassis pairing (Z446 or Z446-K) and power configuration, tube format (30 mL conical or round, 26 mm OD), pack count (2 packs for full 4-bucket configuration = 32 tubes/cycle), and lead time.
Warranty: 5-Year Hermle warranty (3 years full + 2 years drivetrain) on the inserts.
Z446-750 intermediate-volume insert family (Z446-750-AC swing-out rotor):
- Z446-750-A30 (this product) — 8 × 30 mL (32/cycle)
- Z446-750-A50R — 7 × 50 mL round (28/cycle)
- Z446-750-A15R — 18 × 15 mL (72/cycle)
Match the insert to the workflow's intermediate-volume tube format. The 30 mL insert is the right pick when 30 mL is the workflow's specific working volume.
