COMPONENTS
Screw Shafts
From modern day splined shafts to older style keyed shafts across 30+ OEM manufacturers, CPM Extrusion Group offers the industry’s widest selection of twin-screw replacement screw shafts.
We have placed high priority on the development of advanced construction materials and the continuous improvement of our manufacturing process. Due to this and our emphasis on maintaining low costs and competitive lead times, there is no better source for your critical replacement screw shafts.
Shaft Components
In addition to our shafts, we offer and stock a wide range of shaft components which serve or add various functions.
These include:
Seal bushings for sealing between process section and extruder lantern
Coupling assemblies to mount screw shafts to gearbox output shafts
Tips and tip bolts of various designs
Replacement drive splines and nuts for three-piece shafts
Cleaning tools to remove product from shaft splines
Cold Forming Advantage
CPM Extrusion Group exclusively uses the cold-forming process to produce splined extruder shafts. The cold-forming process displaces (“hammers”) the steel splines instead of removing it through machining (“cutting”). This “hammering” process increases the steel strength by rearranging the grain structure over the entire tooth profile. This is preferable to “cut” splines due to the significantly higher strength capability of the finished product. In addition to increasing strength, cold-formed shafts have an improved surface finish which increases fatigue life. Dimensional stability with respect to required tolerances is greatly enhanced and materials in compression will not crack, whereas materials in tension will elongate and fail.
Cold Forming Process
Steps:
- Impacted by rollers
- Indexed (turned)
- Axially advanced
- Repeated (very fast)
Converts tensile stress in wrought steel to compressive stress which strengthens shaft
Metallurgy Overview
Having operations in three separate continents provides global leverage to source the widest range of materials of construction in the industry. This graphic illustrates an overview of our most popular metallurgies and their respective wear and corrosion rating.
