SSI Shredding Systems, Inc. products

Normally, with simple nut and bolt tightening, the shredder cutters and spacers gradually loosen during operation. This traditional locking method requires frequent and tedious maintenance to prevent loosening, damage and poor performance.

All SSI shredders have a built in control feature that allows the machines to automatically reverse operational direction any time it’s required to re-orient the material and enhance the machine’s ability to grab and process it. In the event that the material cannot be processed by the shredder, SSI controls will automatically stop the shredder after a pre-set number of attempts and the shredder horn will sound, indicating the machine has stopped.

SSI’s cutting chamber design isolates system bearings and seals from processed material preventing seal damage and improving on-line reliability. SSI’s shredder designs incorporate splash plates, sometimes called false end plates, at each end of the cutting chamber. Splash plates isolate shredded material from the seal area. To enhance this separation, round (hookless) cutters adjacent to the splash plates ensure that no shredding occurs directly against the splash plate walls. Finally, a small radial clearance separates an oversized spacer from the splash plate opening.

For most shredder applications SSI`s standard cutter hardness is suitable. However, when certain applications require a harder, sharper edge, the cutters are hardfaced. This is done by welding alloys to the cutter edges. SSI uses proprietary alloys to hardface their cutters. The alloys are rated up to a hardness level of HRC 58-66, with 61 being average. The advantage of hardfacing is that the cutter keeps its edge longer. And it is ideal for making clean cuts of ductile but abrasive materials such as tires, carpet, and nylon.

SSI shredding equipment using low-speed technology offer a variety of benefits. When used in conjunction with SSI’s auto-reverse and shock-load protection features, these shredders process a wide range of materials, including ferrous metal.

SSI`s unique screen design not only efficiently controls particle size but also aids in the shredding action. Our shredder screens are concentrically aligned with the rotating cutter shafts, so as the cutters interact with the screen face, they are able to tear and pull cut material apart. For example, in tire shredding, this screen/cutter interaction liberates embedded metal bead and sidewall wire in preparation for crumbing.

Cleaning fingers prevent material from accumulating between cutters or wrapping around the a shredder’s shaft. They also provide extra shaft support in applications which experience shaft flexing. These flat steel plates attach to the side walls of a shredder’s cutting chamber. The semicircular fingers extend between the shredder’s cutters with finger notches fitting closely around the spacer.

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.