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Screw Conveyor Corporation Preventative Maintenance
LOCKOUT / TAGOUTAlways refer to your safety and installation manuals.
Always Replace Safety Stickers….
Wear at Inlet/Feed Locations (Screw Flights and Pipe)
Screw Flight (Outer Edge)
Pipe Outer Surface
What can you do! Thicker flights, Abrasive resistant materials, Hard Surfacing
Wear at Hanger locations (Hanger bearings and shafts)
What do you do! Check the required Trough Loading (Not exceeding a 45% trough load)
Hanger Bearing
Coupling / Hanger end shaft
Hanger Frame
Screw Junctions (Flight incorrect mounting methods and excess
trough loading contributes to ware)
Flights at 180° (One flight to the other)
Designed Trough loading (No higher than 45% loaded) What do you do! Check the designed Trough Loading
(Not exceeding a 45% trough load) Rotate flights 180 degree
Screw Junctions (Cont.) (Trough Wear)
Ware at trough junctions (Before and after the flanges)
What do you do! Check the designed Trough Loading (Not exceeding a 45% trough load) Rotate flights 180 degree
Coupling Bolts (CEMA standard thread lengths and Torque
requirements)
Coupling bolt over tightening and pipe constrictions
Pipe breaking/ Cracks
Over torqued non standard bolts (Constriction of the pipe)
What to do! Use CEMA standard coupling bolts.
Over tightened coupling bolt Example
Big, no! no!
Non standard bolt using washers
Don’t be this guy…
Alignments issues
Alignment Issues
90% of breaks and damage problems are due to alignment issues.
Support systems adequately plum
Make sure the conveyor is installed correct and straight
How to tell a miss alignment issue
Good bearing (Centered and round)
Bad bearing (Wear to one side and egg sha
Extreme wear
Don’t let this happen. Fix the alignment issue!