Hex Shafts

Hex Shafts are still considered by many to be stronger than round/keyed shafts. If it weren't for the wear and maintenance problems caused by loose cutters slipping across the hex face, they would still be preferred by many users.

SSI solved the loose cutter problem with the ACLS (Advanced Cutter Locking System), which keeps cutters and spacers tight on the shaft, eliminating wobble. Now both round/keyed and hex shafts are available on SSI shredders.

Round/Keyed Shafts

Traditionally shredders were mounted with hex-shaped shafts, which were preferred for high torque applications. However, both hex shafts and cutters tend to wear down as the cutters become loose, and eventually the entire shaft and cutters would need to be replaced.

SSI's solution to this is the Round/Keyed Shaft. This type of shaft actually locks the cutters onto it and performs very well under high loads. A tremendous economic and maintenance advantage of the round/keyed shaft is that when it becomes worn, you only need to replace the key and not the entire shaft and its cutters.