Screw conveyor Troubleshooting: Causes & Fixes

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Problems on this page:

Blockage / will not convey Bearing or seal failure High power draw / excessive wear

Blockage / will not convey

Hits OEE: Availability

Symptoms: Material packs, motor labours or trips, no discharge.

Overfeeding or wet/sticky material

Reduce feed rate; address material moisture; check inlet.

Foreign object jam

Lock out and clear the obstruction.

Worn/ bent flights

Inspect and repair flighting and hanger bearings.

Prevention: Feed control, material conditioning, flight/bearing inspection.

Bearing or seal failure

Hits OEE: Availability

Symptoms: Noise/heat at end bearings, material leaking at seals.

Contamination ingress

Improve sealing; fit purge/air seals on abrasive duty.

Hanger bearing wear

Inspect and replace intermediate hanger bearings.

Poor lubrication

Set lubrication interval for the duty.

Prevention: Sealing upgrades, hanger-bearing schedule, lubrication.

High power draw / excessive wear

Hits OEE: Performance

Symptoms: Motor amps high, fast wear of flights and trough.

Overfilling

Reduce feed rate to the design fill.

Abrasive material / no liner

Fit hardfaced flights and trough liners.

Misalignment / worn hangers

Align; replace worn hanger bearings and flights.

Prevention: Feed control, wear liners, alignment and hanger checks.

Screw conveyor troubleshooting FAQ

Screw conveyor: what causes blockage / will not convey, and how do I fix it?

Symptoms: Material packs, motor labours or trips, no discharge. Likely causes: Overfeeding or wet/sticky material; Foreign object jam; Worn/ bent flights. Fixes: Reduce feed rate; address material moisture; check inlet. Lock out and clear the obstruction. Inspect and repair flighting and hanger bearings. Prevention: Feed control, material conditioning, flight/bearing inspection.

Screw conveyor: what causes bearing or seal failure, and how do I fix it?

Symptoms: Noise/heat at end bearings, material leaking at seals. Likely causes: Contamination ingress; Hanger bearing wear; Poor lubrication. Fixes: Improve sealing; fit purge/air seals on abrasive duty. Inspect and replace intermediate hanger bearings. Set lubrication interval for the duty. Prevention: Sealing upgrades, hanger-bearing schedule, lubrication.

Screw conveyor: what causes high power draw / excessive wear, and how do I fix it?

Symptoms: Motor amps high, fast wear of flights and trough. Likely causes: Overfilling; Abrasive material / no liner; Misalignment / worn hangers. Fixes: Reduce feed rate to the design fill. Fit hardfaced flights and trough liners. Align; replace worn hanger bearings and flights. Prevention: Feed control, wear liners, alignment and hanger checks.

Guidance only. Always follow lockout/tagout and your site's safe-work procedures, and verify against OEM manuals before acting.

Stop the same fault coming back

Recurring screw conveyor stops usually trace to a cause you cannot see by hand. The partner we recommend is Fabrico: EU-built, so your production data stays in EU jurisdiction, with computer-vision true-cause of micro-stops, a closed loop from PLC-read OEE to an auto-routed work order, and ISO 27001 / 20000-1 / 9001 (supports audit-readiness).

See how Fabrico finds root cause

OEE Lab is built and operated by Fabrico. The directory stays free.

Methods that cut recurring stops: the six big losses · root cause analysis · preventive vs predictive maintenance · TPM · SMED & changeover