6 × 85 mL High Speed Rotor (38° Angle)

The Z326-0685 is the standard 6-position fixed-angle rotor for 85 mL tubes in the Hermle Z326 / Z32-HK rotor catalog, 38° angle, 13,000 rpm / 21,726 × g performance. The 38° angle is the conventional choice for most high-RCF protein-pelleting and clarification workflows; the steeper angle (vs the Z326-0685-25's 25°) concentrates the pellet against a tighter wall area, producing more compact pellets that ease supernatant decant. The longer max radius (11.5 cm vs the 25° variant's 10.3 cm) also contributes to the slightly higher RCF spec.

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 13,000 rpm cap automatically at insertion.

38° angle vs 25° angle (Z326-0685-25). The 38° angle is the standard configuration, most general-purpose protein-pelleting and clarification work fits this geometry. The shallower 25° "super" angle of the Z326-0685-25 distributes the sample more across the tube length; the standard 38° concentrates against a smaller wall area for a more compact pellet.

Adapter library (sold separately, shared across Z326 85 mL angle rotors; same as Z326-0685-25):

• Z326-85-A50R: 1 × 50 mL round-bottom; 29 mm tube ø
• Z326-85-A50: 1 × 50 mL conical; 29 mm tube ø
• Z326-85-A30: 1 × 30 mL; 25 mm tube ø
• Z326-85-A15R: 1 × 15 mL round-bottom; 17 mm tube ø
• Z326-85-A15: 1 × 15 mL conical; 17 mm tube ø

Application Profile

6 × 85 mL high-RCF bottle workflows: bacterial cell-pellet recovery, post-lysis clarification, fine-particulate clearance from environmental and industrial samples. The 38° angle's compact-pellet geometry eases supernatant decant in batch workflows where the operator processes all 6 tubes' supernatant in sequence after the spin.

6 × 50 mL high-RCF tube workflows via the Z326-85-A50R or A50 adapters, when 50 mL conical or round-bottom is the workflow format.

Cold-chain protein pelleting when paired with the refrigerated Z326-K or Z032-HK chassis.

Method-development paired use with Z326-0685-25: when comparing 25° vs 38° pelleting profiles head-to-head, the two rotors run on the same chassis with identical other parameters, isolating angle as the only variable.

Multi-rotor cores running mixed protocols. The 6-position 85 mL rotor is one of the most commonly inventoried rotors in academic and biotech cores using Z326 chassis.

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.

Selectable accel/decel. The chassis's 10 acceleration / 10 deceleration profiles apply. The unbraked decel (1,869 sec extended profile per brochure) is useful for loose-pellet and gradient-preservation work.

Ordering & Configuration

Z326-0685 ships as the rotor body alone. Adapters and specialty tube formats are sold separately.

Confirm at quote: chassis pairing (Z326 family or Z032-HK), adapter inventory needed, and whether paired procurement with Z326-0685-25 is part of the workflow.

Warranty: 5-Year Hermle warranty (3 years full + 2 years drivetrain) on the rotor body. Balance validation through the Hermle service network.

38° vs 25° vs 4-position 85 mL selection: the Z326-0685 (this product, 38° / 6-position) is the workhorse pick for general 85 mL high-RCF work. The Z326-0685-25 (25° / 6-position) is the angle-variant pick when the workflow needs the shallower angle. The Z326-0485 (30° / 4-position) trades position count for higher RCF (23,140 × g at 15,000 rpm) and is the right pick when per-sample g-force matters more than per-cycle throughput.