Rotor JA-20.1 - Good

JA-20.1 Fixed Angle Rotor – Precision and Power for Advanced Centrifugation

The Beckman Coulter JA-20.1 Fixed Angle Rotor is a high-performance centrifugation tool designed to reach speeds of up to 20,000 rpm. This rotor is specifically engineered to process up to thirty-two 15 mL tubes arranged in two concentric rows at a 23-degree angle, providing an effective solution for separating subcellular particles, bacteria, algae, chloroplasts, and for short-column banding of viruses and subcellular particles. With a maximum capacity of 480 mL, it allows for centrifugation of large gradients and samples, making it a versatile choice for research and clinical applications.

The JA-20.1's design optimizes centrifugation efficiency through uniform centrifugal force distribution. At a maximum speed of 20,000 rpm, it generates an impressive relative centrifugal field of up to 51,500 × g in the outer row of tubes. For samples in the inner row, the centrifugal field reaches up to 43,900 × g. These features enable rapid and efficient separation of particles and cells while ensuring reliable results.

The rotor is constructed from anodized aluminum, providing exceptional resistance to corrosion and wear, ensuring a long lifespan even in demanding environments. Anodized aluminum also ensures ease of cleaning and maintenance. The rotor is equipped with Buna N rubber O-rings in both the lid and the body, which maintain atmospheric pressure inside the rotor during centrifugation, preserving sample integrity. These O-rings must be properly lubricated to ensure an airtight seal and optimal operation.

The JA-20.1 incorporates advanced safety features, including two pins in the rotor drive hole that prevent slippage by mating with grooves in the centrifuge drive hub. Whether used with older or newer centrifuge models, this mechanism ensures the rotor stays securely in place during acceleration and deceleration, reducing the risk of failure.

The functionality of the JA-20.1 is enhanced by the option to use a hold-down knob (354456) to secure the rotor to the centrifuge without the need for the rotor lid. This practical option simplifies usage and improves flexibility during operations.

This rotor is compatible with Beckman Coulter J2, J6, and Avanti J series centrifuges, offering seamless integration with these systems. The approximate acceleration time to reach maximum speed is 1 ½ minutes when fully loaded, and deceleration takes about 2 ½ minutes, ensuring a swift and efficient centrifugation process.

In summary, the Beckman Coulter JA-20.1 rotor provides a robust and high-performing solution for advanced centrifugation applications. Its combination of speed, safety, and durability makes it an indispensable tool for laboratories requiring exceptional precision and reliability.

Maximum Speed: 20,000 rpm

Critical Speed Range: 600 to 800 rpm

Density Rating at Maximum Speed: 1.2 g/mL

Maximum Allowable Imbalance of Opposing Loads: 2 grams

Relative Centrifugal Field at Maximum Speed Outer Row of Tubes:

• At rmax (115 mm): 51,500 × g
• At rmax with adapter 342327 (107 mm): 47,900 × g
• At rmin (64 mm): 28,700 × g

Relative Centrifugal Field at Maximum Speed Inner Row of Tubes:

• At rmax (98 mm): 43,900 × g
• At rmax with adapter 342327 (90 mm): 40,300 × g
• At rmin (47 mm): 21,100 × g

K Factors at Maximum Speed:

• Outer Row of Tubes: 371
• Outer Row of Tubes with Adapter 342327: 325
• Inner Row of Tubes: 465
• Inner Row of Tubes with Adapter 342327: 411

Number of Tube Cavities: 32

Nominal Tube Dimensions (Largest Tube): 18 × 99 mm

Nominal Tube Capacity (Largest Tube): 15 mL

Nominal Rotor Capacity: 480 mL

Approximate Acceleration Time to Maximum Speed (Fully Loaded): 1 ½ minutes

Approximate Deceleration Time from Maximum Speed (Fully Loaded): 2 ½ minutes

Weight of Fully Loaded Rotor: 7.5 kg (16.5 lb)

Rotor Material: Aluminum (anodized for corrosion resistance)

O-Ring Material: Buna N rubber for maintaining atmospheric pressure during centrifugation