Screw Conveyor Corporation Preventative Maintenance ... Presentation 2019 (2).pdf · Screw Conveyor...

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!