Metal pin of the so-called. Predetermined breaking point breaks too early and too fast

The metal pin (hex) of the continuous Schnitzer wing breaks already at a very low blockade through the clippings. In my case it was a piece of carrot, which stalled at the cutting edge.
That would not be so bad if there were, for example, the individual metal pin in stores individually or equal to several in the same pack as a spare part. After the installation of the metal pin in the driver blade would be very easy!
Instead, man / woman forced equal to the cpl. Durchlaufschnitzerfügel for buying an average of 10-12. Real rip off!
All my research, even with Bosch itself, with regard to a metal pin order / procurement failed because they simply are not buying.
This detracts from the very positive overall impression and the handling of the Bosch kitchen appliance unfortunately immense. Because the food processor itself and the associated ancillaries are impeccable.