How to Measure Tapered Chute Liner Plates for Replacement
Replacement liner measurement guide
Measure both end widths, centerline length and hole references before requesting a tapered chute liner replacement.
A tapered liner is not simply a rectangular plate with one angled edge. Its narrow end, wide end, side taper, hole pattern and installation orientation must work together inside the chute transition.
Tapered chute liner plates are used where a hopper throat, chute transition or conveyor transfer point changes width. For a reliable drawing-based RFQ, the buyer should identify the wide end, narrow end, plate length, thickness, wear face, mounting-hole references and taper direction. Missing one of these details can lead to a mirrored part, incorrect hole positions or poor fit-up during shutdown.
Minimum dimensions for a tapered liner RFQ
| Dimension | What to measure | Why it matters |
|---|---|---|
| Wide-end width | Overall width at the larger end of the plate. | Defines one end of the taper and the installation orientation. |
| Narrow-end width | Overall width at the smaller end. | Confirms the width transition and prevents a mirrored replacement. |
| Overall length | Measure along the plate centerline from end to end. | Controls coverage length and hole reference positions. |
| Plate thickness | Measure at a clean, unworn edge whenever possible. | Old liners may be thinner than the original nominal thickness. |
| Side lengths | Measure both left and right sides if the taper is not symmetrical. | Reveals offset or eccentric geometry. |
| Hole layout | Hole diameter, slot size, pitch and edge distances. | Prevents drilling and rework during installation. |
Start by marking the installation orientation
Before taking dimensions, mark the wear face, chute-shell side, material-flow direction, wide end and narrow end. If the liner is removed from the chute, also mark whether it was installed on the left wall, right wall, floor or roof. These simple notes reduce the risk of producing the correct shape in the wrong orientation.
RFQ note: A photo with the words “wear face,” “flow direction,” “wide end” and “narrow end” is often more useful than an unmarked dimension list.
How to check whether the taper is centered or offset
Some tapered plates are symmetrical about the centerline, while others have one straight side and one angled side. Do not assume the taper is centered. Measure both side lengths and, when possible, locate the center of each end relative to a common datum line.
| Geometry | How to identify it | Recommended drawing note |
|---|---|---|
| Centered taper | Both side edges change by the same amount. | Show a centerline through the wide and narrow ends. |
| One-side taper | One side remains straight while the opposite side angles inward. | Use the straight side as datum A. |
| Offset taper | Both sides change, but not equally. | Dimension both side edges and both end-center offsets. |
| Taper plus curve | The plate changes width and also follows a chute radius. | Add inside/outside radius and bend direction. |
If the liner also follows a curved chute shell, use the guidance in How to Measure Radius for Curved Chute Liner Plates and clearly state whether the radius is measured on the inside or outside surface.
Use stable datums for mounting-hole measurements
Hole positions should be measured from stable end and side datums, not only from neighboring holes. Worn edges, elongated holes and site modifications can make hole-to-hole measurements unreliable. A practical method is to use the wide end as datum A and one clearly identified side as datum B.
- Measure each hole center from datum A along the plate length.
- Measure each hole center from datum B across the width.
- Record whether holes are round, slotted, countersunk or intended for plug welding.
- For slots, state slot length, slot width and slot direction.
- Photograph any field-drilled or badly worn hole separately.
Where controlled installation adjustment is needed, slotted hole chute liner plates may be considered. Fixing options can also be compared with bolt-on chute liner plates, countersunk bolt wear plates, plug weld chute liner plates and stud-backed chute liner plates.
What to do when the old liner is badly worn
A worn liner may no longer represent the original design. The narrow end can become rounded, mounting holes can stretch and one side can lose more material than the other. In these cases, combine several references instead of copying the worn outline directly.
| Reference source | How to use it |
|---|---|
| Chute-shell dimensions | Measure the actual transition opening and available installation space. |
| Neighboring liners | Compare overlaps, gaps and repeated hole pitches. |
| Original arrangement drawing | Confirm nominal geometry, part marks and installation direction. |
| Cardboard or thin-sheet template | Trace the required outline when direct measurement is difficult. |
| Site photos | Show flow direction, wear pattern, obstructions and access limitations. |
Material and thickness information
Geometry alone is not enough for a useful quotation. Include the target material grade, thickness, application and working conditions. Common options include NM400, NM450 and NM500 wear plate, but material selection should consider impact, abrasion, forming requirements and welding procedure. If the original grade is unknown, provide the handled material, particle size, drop height, temperature, moisture and expected service life.
When a segmented design is easier to install
Large tapered liners can be difficult to handle through a small access door. Splitting the liner into controlled segments may simplify manufacturing, packing and shutdown replacement. The segment joints should be reviewed together with flow direction, wear zones and mounting points.
- Long hopper transitions with limited access.
- Heavy plates that exceed safe manual handling weight.
- Wide-to-narrow transitions with different wear intensity.
- Projects where only the most worn section should be replaceable.
RFQ checklist for tapered chute liner plates
| RFQ item | Information to include |
|---|---|
| Shape | Wide-end width, narrow-end width, centerline length, both side lengths and taper orientation. |
| Material | Required grade or working conditions for material review. |
| Thickness | Nominal target thickness and current worn thickness if available. |
| Fixing | Hole type, size, pitch, edge distance, slot direction and fastening method. |
| Application | Hopper throat, chute transition, transfer point or crusher feed chute. |
| Orientation | Wear face, chute-shell side, flow direction, wide end, narrow end and installation position. |
| Documents | Drawing, marked photos, template dimensions, material certificate and inspection requirements. |
Related technical resources
- How to Measure Chute Liners for Custom Replacement covers the general replacement-liner workflow.
- Chute Liner Inspection Checklist Before Shipment helps buyers verify dimensions and part marks before packing.
- Quality Documents for Custom Chute Liners explains which records buyers can request.
- Manufacturing Capabilities covers drawing review, cutting, drilling, forming review, inspection and export packing.
- Custom Processed Wear Plates, Hopper Liners and Conveyor Transfer Point Wear Liners may also be relevant to transition projects.
Send tapered liner measurements for review
Attach drawings, marked photos, wide-end width, narrow-end width, length, thickness, hole layout, quantity and working conditions. We will review the part as a drawing-based RFQ.