Conveyor Transfer Point Liner Layout: 9 Design Checks

A useful conveyor transfer point liner layout is more than a list of materials and thicknesses. It is a position-controlled plan showing where impact, sliding abrasion, side loading and discharge wear occur; how panels are divided; which way joints face; and what information a fabricator needs to reproduce each replacement piece.

This checklist focuses on liner zoning and drawing layout. For broader material, thickness and fixing choices, read our mining transfer-point liner design guide. If you already have drawings and need replacement parts, go to conveyor transfer point wear liners.

Quick answer: the 9 checks on a liner-layout drawing

1. Fix a common datum and identify the direction of material flow.
2. Separate impact, acceleration, sliding, sidewall and discharge zones.
3. Map actual wear evidence to those zones.
4. Give every liner panel a unique position mark.
5. Place panel joints away from the most severe direct impact where practical.
6. Orient exposed edges so the stream is not driven behind the liner.
7. Show holes, seats, access direction and protected fastener details.
8. Check replaceable-panel size against access, lifting and maintenance constraints.
9. Issue one controlled RFQ package with drawing revision, duty data and inspection requirements.

1. Establish flow direction and one drawing datum

Start with a general arrangement showing the incoming belt or feeder, discharge point, receiving belt, chute walls and the expected material path. Mark the direction of flow. Choose a repeatable datum—such as a structural centreline, flange face or surveyed reference—and dimension the liner layout from it. Avoid chains of dimensions taken from worn plate edges because those edges may no longer represent the original geometry.

Photographs should use the same orientation as the drawing. Labels such as “left wall” and “right wall” are ambiguous unless they are tied to the direction of flow. A simple position convention—LW-01 for left wall, RW-01 for right wall, IB-01 for impact bed—can prevent reversed panels and make later thickness records usable.

2. Divide the transfer point by wear mechanism

A transfer chute often contains several different duties within a short distance. Dividing it into zones makes the panel layout and material decision auditable.

The zone boundaries are not universal dimensions. They should come from the equipment geometry and evidence: worn-liner photographs, thickness measurements, material trajectory observations and maintenance records. A polished line that crosses several panels is often more informative than the nominal chute label.

3. Build a position-based wear map

Record the remaining thickness of each panel at consistent points and place the values on the layout drawing. Add installation date, measurement date and operating-hours estimate where available. If a panel has failed, distinguish between uniform section loss, a loose fixing, a crack from an unsupported edge, and damage from oversized feed. These are different problems and may require different corrections.

A good minimum record is a photograph with the position mark visible, a sketch of measurement points, nominal and remaining thickness, and a short failure note. Do not average away left/right differences or a single fast-wearing strip. Those differences can reveal an off-centre feed or a local geometry problem.

4. Segment panels around replacement work

Panel size affects fabrication, lifting, installation time and the number of joints. Large panels reduce joint count but may be difficult to move through an access door. Very small panels can increase hardware, alignment work and the number of edges exposed to material. The practical layout is usually a compromise based on the replacement route and the wear map.

Before finalising panel boundaries, check the access opening, available lifting points, working space behind the chute, the safe mass allowed by the site’s maintenance method, and whether one failed panel can be removed without dismantling several healthy panels. Any lifting lugs or temporary handling features must be engineered and approved for the actual part and site procedure.

5. Control joint position, gap and orientation

Joints are frequent initiation points for material ingress, raised edges and local wear. Show the intended gap, overlap or butt-joint condition on the drawing instead of leaving it to installation interpretation. If the system uses directional laps, make the upstream/downstream relationship unmistakable.

Where practical, avoid placing a cross-joint directly under the first impact point. Stagger joints between adjacent rows if the support and installation plan permit. Check that tolerances do not accumulate until the final panel no longer fits. A final closure piece or defined adjustment method may be more reliable than expecting every field dimension to match a nominal CAD model.

6. Detail fasteners from both the wear side and access side

The layout must show more than hole centres. Define through holes, countersinks or counterbores, bolt or stud type, head protection, washers, nuts, thread engagement and the side from which maintenance occurs. State which dimensions are critical to match the existing structure. Around cast-liner holes, allow sufficient section and practical radii; around formed wear plate, confirm hole-edge distance and forming sequence.

Do not assume that a highly abrasion-resistant cast material can be site-welded like structural steel. Likewise, do not specify welding or thermal cutting for quenched-and-tempered plate without checking the grade supplier’s fabrication instructions. The liner drawing and installation procedure should agree on the attachment method.

7. Keep layout selection separate from material selection

A clear layout makes it possible to use different material routes by zone, but the drawing should not use a vague note such as “hard liner” for every position. Create a position schedule that connects each panel mark to material, nominal thickness, manufacturing route and inspection requirement.

8. Check interfaces beyond the liner panels

A liner layout can fit the chute shell and still create an operating problem if it narrows the flow path, leaves an upstream-facing step, interferes with a skirt or creates an unsupported lip. Review interfaces with the inlet, impact system, rock box or deflector, sidewall, skirt, inspection doors, discharge opening and receiving belt. Maintain the equipment designer’s required clearances and structural support.

If the wear pattern indicates blockage, spillage or off-centre loading, changing liner material alone may not solve it. Use the layout to document where the symptoms occur, then involve the responsible conveyor or chute engineer in reviewing trajectory, capacity and structure.

9. Issue a complete RFQ drawing package

The fastest way to obtain comparable quotations is to send one controlled package rather than a collection of unrelated photos. The supplier should be able to identify every requested item, its quantity and the evidence required for acceptance.

Common layout mistakes to remove before quotation

• Using the same part number for mirrored or position-specific panels.
• Placing joints in the strongest direct-impact path without a support or protection plan.
• Changing thickness without checking the internal flow envelope and interfaces.
• Leaving field-drilled holes as the default when the existing structure can be surveyed.
• Mixing drawing revisions or sending photographs without position marks.
• Requesting a material only by hardness while omitting impact, temperature and fixing conditions.
• Assuming a new liner will correct trajectory, capacity or structural problems by itself.