The Z366-250-B15 is a direct-fit bucket dimensioned for 10 × 15 mL conical tubes, sized for the Hermle Z366-250-HC swing-out rotor on the Z366 / Z366-K chassis 4-place configuration, sold as a 2-pack. Distinct from the bucket-plus-insert approach (Z366-250 + Z366-250-A15 insert delivers 28 × 15 mL conical per cycle), the B15 direct-fit bucket on the HC rotor variant delivers 40 × 15 mL conical tubes per cycle, 43% higher throughput. The deep cold-chain capability of the Z366-K chassis (−2 °C at max speed) supports cold-stable 15 mL conical workflows at scale.
Key Specifications
| SKU | Z366-250-B15 |
| Type | Direct-fit bucket (10 × 15 mL conical) |
| Pack quantity | 2 buckets per SKU (full 4-bucket configuration takes 2 units = 4 buckets) |
| Per-bucket capacity | 10 × 15 mL conical tubes |
| Per-cycle throughput (full configuration) | 40 × 15 mL conical per cycle |
| Tube format | 15 mL conical Falcon-style (17 mm OD, 120 mm length) |
| Compatible rotor | Z366-250-HC swing-out rotor (HC = high-capacity variant of Z366-250) |
| Compatible chassis | Z366, Z366-K (refrigerated), and -E voltage variants |
| Max. operating speed | 4,500 rpm at 3,735 × g maximum |
| Max. radius | 16.5 cm (0.0 cm radius correction; full radius preserved) |
| Temperature at max speed (Z366-K refrigerated) | −2 °C |
| Geometry | Swing-out (0–90°): flat sediment surface |
| List price | $562 (2-pack) |
Direct-Fit Bucket vs Bucket-Plus-Insert: Configuration Choice
The Z366 chassis offers two paths for swing-out 15 mL conical workflows:
| Configuration | Per cycle | Approach |
| Z366-250-B15 (this SKU) | 40 × 15 mL conical | Direct-fit bucket on Z366-250-HC rotor (43% higher throughput, dedicated to 15 mL conical) |
| Z366-250 + Z366-250-A15 insert | 28 × 15 mL conical | Bucket + insert on Z366-250 rotor (bucket holds other inserts too) |
Pick the B15 when higher per-cycle 15 mL conical throughput matters and the lab's primary workflow is 15 mL conical clinical-research / biobank prep. Pick the bucket+insert path when the bucket needs to serve multiple tube/bottle formats.
Compatibility & When to Order This SKU
Bucket pairing: Z366-250-HC rotor only. Order this SKU when:
- Commissioning a Z366-250-HC for institutional 15 mL conical clinical-research workflow. Order 2 units for full 4-bucket configuration (40 tubes/cycle).
- Adding higher-throughput 15 mL conical capability to an existing Z366 / Z366-K install that currently uses the bucket+insert configuration on the Z366-250 rotor.
- Replacement buckets if a current set is damaged or worn.
Application Profile
Institutional 15 mL conical clinical-research and biobank prep at scale: patient sample fractionation, aliquot prep, freeze-storage workflows at 40 × 15 mL conical per cycle on the deep cold-chain swing-out chassis.
Cell-culture pellet recovery in 15 mL at scale, pelleting non-adherent cells from 40 parallel 15 mL suspension batches per cycle with deep cold-chain integrity.
Density-gradient prep in 15 mL at scale: Ficoll, Percoll, sucrose-gradient prep at 40 parallel preps per cycle on the cold-chain swing-out chassis.
Cold-chain protein prep in 15 mL conical at scale: TCA, ammonium-sulfate, organic-precipitation in 15 mL conical at 40 parallel preps with refrigeration.
High-throughput educational and graduate-level teaching. Molecular biology and clinical-tech curricula at institutional teaching scale.
Cross-format Z366-K / HC core facilities: labs running 15 mL conical at high throughput alongside other workflows benefit from the direct-fit bucket for the dominant 15 mL workflow plus the bucket+insert approach for occasional other formats.
Ordering & Configuration
4-bucket symmetric loading. All 4 buckets must be installed for symmetric balance at 4,500 rpm.
Per-bucket symmetric loading. Within each bucket, the 10 conical tubes should be balanced symmetrically. Pair tubes by mass.
Tube cap confirmation. All conical tubes must be securely capped before spinning at 4,500 rpm.
Z366-250-B15 ships as 2 buckets. 15 mL conical tubes are operator-supplied (commodity Falcon / Corning / equivalent formats).
Required for operation:
- Z366-250-HC rotor body (sold separately) or already in inventory
- For full 4-bucket configuration: order 2 units of this SKU
Confirm at quote: rotor pairing (Z366-250-HC in inventory), chassis pairing (Z366 or Z366-K), tube format (15 mL conical Falcon-style), pack count (2 packs for full 4-bucket configuration = 40 tubes/cycle), and lead time.
Warranty: 5-Year Hermle warranty (3 years full + 2 years drivetrain) on the buckets.
Z366-250 15 mL conical workflow paths (Z366 / Z366-K chassis):
- Z366-250-B15 (this product): 10 × 15 mL conical direct-fit bucket on Z366-250-HC (40/cycle, dedicated higher throughput)
- Z366-250-A15: 7 × 15 mL conical insert on Z366-250 (28/cycle, bucket-insert flexibility)
Pick B15 when 15 mL conical throughput is the dominant workflow driver; pick A15 for bucket-insert flexibility across multiple tube formats.
