How a Helicoid Screw is Manufactured
Helicoid screws have a manufacturing process unique to this type of flighting, offering a robust and cost-effective solution. Watch the detailed process in this KWS video.
Video Transcript
How is a Helicoid Screw Manufactured?
A helicoid screw is manufactured by mounting or welding helicoid flighting to a center pipe.
Helicoid flighting is formed as a continuous helix using a special rolling machine. During the rolling process, the inside diameter of the flighting is larger than the finished diameter of the pipe, allowing the flighting to easily slip over the pipe during the mounting process. Once the flighting is slipped over the pipe, one end is secured with a stitch weld. The helicoid flighting is then stretched from the opposite end until the inside diameter of the flighting matches the outside diameter of the center pipe. Dimensions are verified to meet CEMA tolerances. The flighting is then welded to the center pipe with either stitch welds or continuous welds on one or both sides of the flight. End lugs are added to both ends to provide additional support.
After completing the welding process, the screw is drilled on both ends for CEMA standard 2 or 3-bolt couplings. The final steps are to clean up and remove weld spatter, straighten the screw to industry tolerances and paint the screw with industrial gray enamel paint.
KWS helicoid screws are manufactured to Conveyor Equipment Manufacturer’s Association standard dimensions and tolerances.
