Forward Shreading judders

If you shredder is like our Ativa DX200D I have a pretty good idea what the problem is. Our shredder had the same identical issue, it was out of warranty so opened it up to see if there was debris in the teeth that could not been seen from the outside. To my surprise one of the steel gears (a 3" diameter one, very heavy too), had 5 teeth worn down, and after testing I determined that the judder happened when the shredder ran with any kind of a load and the gear came around to the side with the worn teeth.

You may need to find a replacement gear, or just buy a new shredder.

Good luck!