Beckman Coulter JA-20.1 Fixed Angle Centrifuge Rotor

The JA-17 from Beckman Coulter is a high-performance fixed-angle rotor designed for centrifuges in the J2, J6 and Avanti J series.
– Maximum speed: 20,000 rpm
– Capacity: it holds up to 32 x 15 mL tubes, arranged in two concentric rows at a 23-degree angle, for a total volume of 480 mL per cycle.
– Material: the robust anodised aluminium rotor guarantees reliability, safety and compatibility with a wide range of tubes and vials. It is perfectly suited to cell biology, microbiology or biochemistry applications requiring powerful and homogeneous centrifugation.
– Weight loaded: 7,5 kg.

Technical details
• 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:
o At rmax (115 mm): 51,500 × g
o At rmax with adapter 342327 (107 mm): 47,900 × g
o At rmin (64 mm): 28,700 × g
• Relative Centrifugal Field at Maximum Speed Inner Row of Tubes:
o At rmax (98 mm): 43,900 × g
o At rmax with adapter 342327 (90 mm): 40,300 × g
o At rmin (47 mm): 21,100 × g
• K Factors at Maximum Speed:
o Outer Row of Tubes: 371
o Outer Row of Tubes with Adapter 342327: 325
o Inner Row of Tubes: 465
o 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