50 mL Round Insert for Z326-0685 85 mL Rotor (2/pk)

The Z326-85-A50R is the 50 mL round-bottom tube insert for the Hermle Z326-0685 6 × 85 mL angle rotor on the Z326 / Z327 chassis family — sold as a 2-pack. Each insert holds 1 × 50 mL round-bottom tube; the 6-position rotor takes 3 packs (6 inserts) for full symmetric loading, delivering 6 × 50 mL round-bottom tubes per cycle (300 mL total) at the host rotor's high-RCF range (10,413 × g). Sister insert to the A50 (50 mL Falcon conical) — both serve the same 50 mL workflow envelope but for different tube geometries.

Key Specifications

Compatibility & When to Order This SKU

Insert pairing — Z326-0685 only. Order this SKU when:

1. Adding 50 mL round-bottom workflow to a Z326-0685 install — order 3 units for full 6-position symmetric loading.
2. High-RCF cold-chain 50 mL round-bottom prep — when the workflow needs the >10,000 × g range with cold-chain integrity in 50 mL round-bottom format.
3. Glass round-bottom 50 mL workflows — when the protocol requires glass for organic-solvent compatibility, repeated autoclave reuse, or precise volume measurement.
4. Replacement inserts if a current set is damaged or worn.

Conical vs Round 50 mL — Why Two Insert SKUs

The Z326-85 insert family includes three distinct 50 mL variants for different tube envelopes:

Match the insert to the workflow's tube envelope. Using the wrong-envelope insert risks tube fit problems and balance issues at the rotor's high RCF.

Application Profile

High-RCF cold-chain 50 mL round-bottom glass workflows — organic-extraction, chemical-prep, and precipitation workflows in 50 mL round-bottom glass at refrigerated temperature and >10,000 × g.

Glass-compatible cold-chain protein prep — TCA, ammonium-sulfate, organic-precipitation in 50 mL round-bottom glass on the refrigerated high-RCF chassis.

High-RCF cell-pellet recovery in 50 mL round-bottom — when cell-culture protocols specify round-bottom glass over conical for resuspension volume measurement or solvent-compatibility, with high-RCF tight pellet compaction.

Clinical and clinical-research 50 mL round-bottom workflows — when the workflow specifies round-bottom geometry over conical and the high-RCF cold-chain chassis is the appropriate platform.

Cross-format Z326-K / Z327-K core facilities — shared cores running both 50 mL conical (A50) and 50 mL round-bottom (this A50R) workflows on the same chassis benefit from stocking both insert variants.

Ordering & Configuration

6-position symmetric loading. All 6 positions must use matching A50R inserts for symmetric balance at 9,000 rpm.

Insert seat verification. Confirm each insert is fully seated in its 85 mL position before loading the 50 mL round-bottom tube.

Tube cap confirmation. All 50 mL round-bottom tubes must be securely capped before spinning at 9,000 rpm.

Z326-85-A50R ships as 2 inserts. 50 mL round-bottom tubes (glass or polypropylene) are operator-supplied.

Confirm at quote: host rotor (Z326-0685 in inventory), chassis pairing (Z326, Z326-K, Z327, Z327-K), tube format (50 mL round-bottom; 50 mL conical uses A50, self-standing conical uses A50SS), pack count (3 packs for full 6-position configuration), and lead time.

Warranty: 5-Year Hermle warranty (3 years full + 2 years drivetrain) on the inserts.

Z326-85 insert family — 50 mL variants (Z326-0685 6 × 85 mL angle rotor):

- Z326-85-A50R (this product) — 50 mL round-bottom

- Z326-85-A50 — 50 mL Falcon conical

- Z326-85-A50SS — 50 mL self-standing conical (skirted-base)

Match the insert to the 50 mL tube envelope.