It's a Sorvall rotor, haven't got the model number handy yet, and the serial number is not read-able.  It's possible to make out where it was, and we hope to visualize it somehow with an etchant, but the bottom is so scarred and scored and scraped that it might be hopeless.

The chunk thrown by the rotor shows a large area of aged oxidation, indicating that there was a sizable fissure within the rotor for some time before it broke away completely.

The top part of the motor and spindle.  An undamaged replacement piece sits in front of the damaged connection piece to show what it’s supposed to look like.  This is fairly solid stainless steel, showing the effects caused by the rotor becomingsuddenly severely unbalanced at high speed.  Before the spindle broke away completely.

Damage to the bin where the rotor spins.

Damage to the lid of the centrifuge.

The rotor log has no entries after June 25.  The person using the rotor that failed reports that the incident occurred on Sunday July 6, and that he didn't make an entry because it was his habit to make the entry as the run got going, which it never did.

Different rotor, not involved in this, was apparently spun in the centrifuge with the CDC decontamination sticker still attached, which is astonishingly unsafe, and evidence of

  • gross misconduct, and/or
  • severe lack of supervision, and/or
  • severe lack of training.

The presence of the decon sticker did, however, provide unequivocal evidence that the centrifuge was opened while spinning and some sort of manual braking applied, another profoundly unsafe act and further evidence of gross misconduct, and/or....