to avoid a large reach of the chuck, the chuck terminating cover
having a centering mount can be replaced with one having a short
cover for corresponding direct mounting on the spindle nose as
per DIN 55027 or Camlock (DIN 55029). Of course, this also applies
to a conversion of the chuck from one direct mount to another, in
which case attention must be paid to the inner and outer O-ring
for static sealing.