Description
Screw conveyor wear liners protect the trough and high-wear transition areas while preserving the running envelope required by the screw. EB China supplies replaceable liner plates and cast wear components to customer-approved drawings for mining, cement, aggregate, coal, ash and other abrasive bulk-material duties.
Send a screw conveyor trough or liner drawing
For a useful quotation, include trough inside radius or diameter, liner arc and length, thickness, hole pattern, material handled, throughput, operating temperature, quantity and photographs of the worn area. If available, also mark the screw outside diameter and the equipment designer’s approved running clearance.
What EB China supplies
Our scope is the wear component, not the complete conveyor design. Depending on the approved drawing and duty, the supply can include curved trough liner segments, flat or formed side liners, inlet and discharge wear plates, transition liners, backing plates, countersunk or through-hole fixing details, and replacement sets identified by position. Parts can be manufactured as cut-and-formed wear plate or as alloy castings where geometry, section thickness and foundry feasibility support that route.
We review the drawing for manufacturability and can report dimensional and material inspection results. The conveyor owner, OEM or responsible engineer retains approval of the screw diameter, shaft position, deflection allowance, operating clearance, capacity, drive load, guarding and all machine-safety requirements.
Map the actual wear zone before selecting a liner
A screw conveyor does not wear uniformly. Material loading, fill level, particle size, moisture, speed and alignment change the contact pattern. A quotation based only on overall conveyor length may therefore replace too much material in low-wear areas and still under-protect the critical zone.
| Observed zone | Typical evidence | What to record on the RFQ |
|---|---|---|
| Inlet or feed impact area | Local dents, chipped edges or rapid thickness loss below the feed | Drop height, feed direction, lump size, feed opening and worn-area photograph |
| Trough bottom | Polished band, longitudinal grooving or a thin strip following the screw path | Trough radius, worn-band width, remaining thickness and flight-to-trough relationship |
| Sidewall or upper trough | Asymmetric polishing, build-up or wear concentrated on one side | Fill level, direction of rotation, alignment observations and side-specific panel marks |
| Discharge and transition | Accelerated sliding wear, local turbulence or material packing | Discharge geometry, outlet restriction, material condition and replaceable-panel boundary |
| Joints and fasteners | Raised edges, loosened bolts, packed joints or cracks around holes | Fastener type, access side, hole details, joint orientation and maintenance history |
Material routes for screw conveyor wear liners
The best material is the one that matches the dominant failure mode and can be manufactured and installed without compromising the conveyor envelope. Hardness alone is not a complete specification. Impact, corrosion, temperature, attachment method, section size and allowable repair method must also be considered.
| Material route | Where it may fit | Important limitation to review |
|---|---|---|
| Quenched-and-tempered wear plate | Formed trough segments and replaceable plates where toughness, consistent thickness and fabrication are important | Confirm grade, forming radius, heat input, hole-edge distance and the steel producer’s fabrication guidance |
| High-chromium white cast iron | Severe sliding abrasion with limited impact, especially for shaped cast segments | Brittle behavior, casting section transitions and fixing design require review; do not assume it can be welded like structural steel |
| Alloy cast steel | Complex shapes or duties needing a different toughness/abrasion balance from white iron | Chemistry and heat treatment must be specified together with required mechanical or hardness evidence |
| Composite or ceramic-lined system | Selected fine-abrasion duties where the owner has compatible attachment and impact conditions | Review impact, thermal cycling, bonding or fixing, repair method and fragment-contamination risk |
Generic trade names should not replace a project specification. State the requested standard or grade if one is mandatory; otherwise provide operating evidence so the material route can be compared. Our broader chute liner materials guide explains how abrasion, impact and fabrication requirements change the shortlist.
Dimensions that control fit and clearance
A screw conveyor liner is close to rotating equipment, so a small dimensional error can matter. The manufacturing drawing should define the liner independently of assumptions made from a photograph. At minimum, identify:
- trough inside radius or diameter and the reference datum;
- liner arc angle, developed width, axial length and nominal thickness;
- panel position, orientation and match marks for segmented sets;
- all hole diameters, countersinks, slots, spacing and edge distances;
- joint gaps, overlaps or staggered seams where required;
- inlet, discharge, inspection-door and transition cut-outs;
- any backing, shims or existing shell thickness included in the dimension chain;
- screw flight outside diameter, shaft centreline and the final clearance approved by the OEM or responsible engineer.
Do not reduce running clearance simply to install a thicker liner. Flight wear, shaft deflection, thermal effects, build-up and installation tolerance can all consume the available envelope. Before commissioning, the owner should verify free rotation, alignment, fastener security and guarding under the applicable site procedure.
Panel layout and fixing choices
Segmentation can reduce the weight of each replacement piece and allow the most damaged zone to be changed without relining the full trough. It also creates more joints and fasteners. The drawing should therefore balance maintainability with the risk of raised edges, trapped material and hardware exposure.
Where possible, locate joints outside the most severe local wear band and orient leading edges so the material stream is not driven underneath a panel. Select bolt heads, counterbores or protected studs from the access and wear conditions. For cast liners, avoid sharp section changes and insufficient material around holes. For formed plate, confirm that the requested radius is practical for the chosen grade and thickness.
Quality evidence for a replacement set
A commercial offer is easier to compare when the documentation is defined before ordering. Depending on the material and contract, a practical inspection package may include a material certificate or chemistry report, heat-treatment record where relevant, hardness results with test locations, key dimensional inspection, hole-pattern checks, visual inspection and packing identification by liner position. Additional nondestructive examination should be stated on the RFQ rather than assumed.
What to send for a drawing-based quotation
| RFQ item | Preferred information | Why it matters |
|---|---|---|
| Drawing | PDF plus DWG/DXF/STEP where available; revision clearly identified | Controls geometry, datums, holes and cut-outs |
| Material handled | Mineral or product, maximum lump size, moisture and temperature | Helps distinguish sliding abrasion, impact, build-up and corrosion factors |
| Operating data | Throughput, speed, hours per day, feed arrangement and rotation direction | Provides context for wear-zone mapping |
| Failure evidence | Photos, remaining-thickness map, service interval and failed-part location | Prevents selection from being based on nominal hardness alone |
| Commercial scope | Quantity, required delivery point, documentation and inspection requirements | Defines a comparable quotation |
If the existing liner wears unevenly, mark each photograph and measurement to the same panel-position drawing. This gives the supplier a usable connection between operating evidence and part geometry. See also our guide on reducing wear in bulk material handling systems and the liner thickness selection guide.
Request screw conveyor wear liners
Send the latest liner or trough drawing, operating conditions, worn-part photographs and quantity. EB China will review the wear-component manufacturing route and return a drawing-based quotation or clarification list.
Reviews
There are no reviews yet.