The Importance of Internal Collar Plug Welding for Screws
Conveyor screws are designed to handle torque. If plug welds between the center pipe and internal collar fail, the screw will fail causing an interruption to production. KWS provides four plug welds per bushing, with two plug welds located on each side at 180-degrees apart. Plug welds provided on KWS screws are permanent and guaranteed for life.
Video Transcript
What is the Importance of Internal Collar Plug Welding for Screws?
CEMA standard screws utilize a center pipe with internal collars (or bushings) welded into each end. Together, the center pipe of the screw and internal collars are designed to handle torque as an integral welded assembly. If the welds between the center pipe and internal collar collapse, the complete screw section will fail causing an interruption to production.
Industry standard provides two plug welds per end. KWS provides four plug welds per bushing, two plug welds are located on each side 180-degrees apart. Using a MIG welder, the drilled holes are filled with weld material, penetrating the internal collar and securing the center pipe. The process is repeated for all four plug weld holes. Plug welds provided on KWS screws are permanent and will not break loose.
As part of our commitment to Customer satisfaction, KWS always supplies CEMA standard screws with a minimum of four plug welds per bushing that are guaranteed for the life of the screw.
Pronunciations:
CEMA = See-ma
