Beckman Coulter Type 70 Ti Fixed-Angle Titanium Ultracentrifuge Rotor — 70,000 RPM, 8 × 39 mL, with Lid, OptiSeal/Quick-Seal Spacers & Spinkote (Cat #337922) — Used/Inspected

The Beckman Coulter Type 70 Ti is a flagship 8-place fixed-angle titanium ultracentrifuge rotor designed for high-throughput differential centrifugation of subcellular particles, virus pelleting, exosome isolation, lipoprotein fractionation, and sucrose-gradient purification of organelles. Each of the eight tube cavities is positioned at a 23° angle to the axis of rotation, optimizing both pellet compaction and gradient resolution at sample volumes up to 39 mL per tube — a total nominal capacity of 312 mL per run, the largest in its speed class.

Manufactured from solid titanium with a corrosion-resistant black polyurethane finish and an anodized aluminum lid, the Type 70 Ti is rated to 70,000 RPM and 504,000 × g, suitable for use in Beckman Coulter Optima and other H/R/S-classified preparative ultracentrifuges. The titanium construction provides chemical resistance against virtually all gradient media — including CsCl and sucrose — without speed derating up to specified solution densities.

This unit ships as a remarkably complete package, including the matched original rotor lid, factory overspeed disk installation tool, a fresh tube of Spinkote lubricant, the Beckman tube storage rack, the OEM blue storage drape, the original product carton, and a substantial bundle of OEM spacers for OptiSeal, Quick-Seal, and Bell-Top tube formats — accessories that frequently sell separately for hundreds of dollars and are time-consuming to source after the fact.

CONDITION

Used / Inspected. Rotor body, lid, and tube cavities show only light cosmetic wear consistent with normal laboratory use; threads, drive socket, and crown appear intact under visual inspection. Sold as-is, with no operational spin-test, no remaining cycle-count certification, and no rotor log book provided. Buyer is responsible for inspecting the rotor and confirming remaining service life with Beckman Coulter or a qualified rotor recertification service prior to ultracentrifuge use. Standard Beckman rotor de-rating and retirement policies apply.

TECHNICAL SPECIFICATIONS

• Brand / Manufacturer: Beckman Coulter
• Model: Type 70 Ti (Fixed-Angle Titanium Rotor)
• Catalog Number: 337922
• Serial Numbers: Body S/N 21U8130 | Lid S/N 21U8131
• Rotor Type: Fixed-angle, titanium, ultracentrifuge
• Material: Titanium body with anodized aluminum lid/handle; black polyurethane finish
• Maximum Speed: 70,000 RPM
• Maximum RCF: 504,000 × g
• Tube Capacity: 8 × 39 mL
• Nominal Rotor Capacity: 312 mL
• Tube Angle: 23° (fixed)
• k-Factor: 44
• r_max: 91.9 mm
• r_av: 65.7 mm
• r_min: 39.5 mm
• Compatible Tubes: 25 × 89 mm (Quick-Seal, OptiSeal, polycarbonate bottle assemblies, with appropriate adapters)
• Compatible Instruments: Beckman Coulter Optima-series ultracentrifuges; instruments classified H, R, S
• Major Applications: Differential centrifugation of subcellular particles, virus and lipoprotein pelleting, exosome isolation
• Country of Origin: USA

INCLUDED

• (1) Beckman Coulter Type 70 Ti Titanium Rotor body, S/N 21U8130
• (1) Matched anodized aluminum rotor lid / handle, S/N 21U8131
• (1) Original Beckman Type 70 Ti shipping carton
• (1) Beckman blue rotor storage drape / dust cover
• (1) Beckman tube storage rack (P/N 360538)
• (1) Overspeed Disk Installation Tool (factor Beckman service tool, sealed)
• (1) Tube of Spinkote Lubricant, 30 g
• (1) Sealed bag, O-ring for rotor handle, P/N 011757
• (1) Sealed bag, O-ring for rotor lid, P/N 870612 (qty 2)
• (1) Sealed bag, Overspeed Disks, Beckman P/N 335585 (Type 70, 70,000 rpm)
• (1) Sealed bag, Spacers, Bell-Top OptiSeal, P/N 361669 (set)
• (1) Sealed bag, Spacers, OptiSeal 5/8 in Aluminum, P/N 362202 (qty 12)
• (1) Sealed bag, Spacers, Quick-Seal Tube 1 inch (Red), P/N 342699 (qty 12)
• (1) Sealed bag, Spacers, Cell VTi 65.1 Rotor, P/N 349289 (qty 24)

LT782-X15