Dois-je utiliser les bras longs ou courts pour mon malaxeur à action forcée de 300 l ?

You should measure the height from the bottom of the drum to the top of the top disc:

  • an older machine: approx. 42 cm to the top disc = long arms and shaft
  • a new machine: approx. 39 cm to the top disc / 41 cm incl. the top disc / the top disc is levelled with the drum edge = short arms and shaft