Aluminum channel letter coil is a narrow aluminum strip supplied in rolls to form the sidewalls, or returns, of 3D channel letters. It is used for LED-illuminated letters, reverse-lit signs, and non-illuminated dimensional lettering.
The coil can be fed continuously through a compatible channel letter bending machine or bent by hand, reducing the need for cutting at the sign shop. Before ordering, confirm the thickness, width, edge profile, finish, and machine compatibility.
Aluminum channel letter coil options and specifications
Henan Chalco can review specifications and custom requirements for flat, folded-edge, and preformed channel letter coils, including return profiles, colors, and fabrication needs.
Quick navigation: Product types · U.S. sizes · Common size combinations · Colors and finishes
| Specification | Available options / Reference sizes |
| Product types | Flat / Folded-edge / Preformed |
| Nominal thickness | .032 / .040 / .050 / .063 in |
| Roll length | 270 ft (common ordering length) |
| Surface finishes | Prepainted, mill finish, anodized |
| Colors & finishes | White, black, red, bronze, metallic; prepainted, mill finish, anodized |
| Custom options | Coil width, return profile, A/B-side finish, protective film |
For a quotation, provide the coil type, thickness, width or finished return depth, color, quantity, and a profile drawing if applicable. Henan Chalco can review the requirements and recommend suitable options.
Channel letter coil types and return profiles
Channel letter coils are available in three main profile categories: flat, folded-edge, and preformed. The key differences are the return cross-section, edge configuration, and method of attaching the letter face.
Flat channel letter coil
Straight aluminum strip without preformed edges, used to make the sidewalls of conventional 3D channel letters. It can be shaped on a compatible automatic letter-bending machine or bent manually. The face and back are attached according to the letter design.
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Folded-edge channel letter coil
One or both edges have preformed folds that can serve as mounting flanges or form part of a specified face-attachment design. These include single-fold and double-fold profiles; verify the fold dimensions and orientation against the letter design.
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Preformed channel letter coil
A specially shaped return profile. Some configurations suit trimless channel letters or modular sign assemblies. Confirm the face-attachment method and compatibility of any mating components using a profile drawing.
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Selection guidance:
Flat coil is often a suitable starting point for conventional returns formed on a compatible automatic letter-bending machine. Folded-edge coil suits designs that require a preformed mounting flange. For trimless letters or an existing proprietary assembly system, choose a preformed profile that matches the original cross-section and components to avoid reworking the face connection.
Ordering note: Flat, folded-edge, and preformed coils are not necessarily interchangeable, even at the same thickness and color.
For folded-edge and preformed products, a cross-section drawing showing return depth, fold dimensions, and the face-attachment method is generally more useful for product matching than coil width alone.
Other available sign materials
Perforated channel letter trim coil
F-shaped aluminum trim profile coil
Arrow-shaped aluminum channel letter profile
Channel-shaped aluminum letter material
Why choose pre-slit channel letter coil over aluminum sheet?
Pre-slit channel letter coil is cut to the required width before delivery, helping reduce secondary cutting, offcuts, and preparation time compared with full aluminum sheets.
The coil can feed continuously through a compatible channel letter bending machine for more efficient batch fabrication. Roll form can also simplify handling and packing; freight costs still depend on the dimensions, order quantity, and destination.
Channel letter coil dimensions and specifications
Henan Chalco offers both inch-based and metric size options for aluminum coils used to fabricate channel letter returns.
Specify nominal thickness, coil width, and finished return depth separately. Dimensions that appear similar may still be incompatible with the bending machine or letter assembly.
Common U.S. ordering dimensions
| Specification | U.S. nominal size | Metric equivalent |
| Thickness | .032 in | 0.8128 mm |
| Thickness | .040 in | 1.016 mm |
| Thickness | .050 in | 1.2700 mm |
| Thickness | .063 in | 1.6002 mm |
| Extended thickness range | .020–.080 in | 0.508–2.032 mm |
| Coil width | 3.5 / 4.3 / 5.3 / 8 in | 88.90 / 109.22 / 134.62 / 203.20 mm |
| Additional catalog widths | 1 / 1.5 / 2 / 2.5 / 3 / 4 / 5 / 5.1 / 6 in | 25.4–152.4 mm (individual nominal widths) |
| Roll length | 270 / 500 ft | 82.296 / 152.400 m |
Thickness note: .040 in is 1.016 mm, not the same as a nominal 1.0 mm. Confirm the specified nominal thickness and tolerance before ordering.
Common U.S. channel letter coil sizes
.032 in × 4.3 in × 270 ft
.032 in × 5.3 in × 270 ft
.040 in × 3.5 in × 270 ft
.040 in × 4 in × 270 ft
.040 in × 4.3 in × 270 ft
.040 in × 5.3 in × 270 ft
.040 in × 8 in × 270 ft
.040 in × 5.3 in × 500 ft
.063 in × 1 in × 270 ft
.063 in × 1.5 in × 270 ft
.063 in × 2 in × 270 ft
.063 in × 3 in × 270 ft
.063 in × 3.5 in × 270 ft
.063 in × 4 in × 270 ft
.063 in × 5 in × 270 ft
If you need one of these sizes or a custom dimension, contact us to discuss the required specifications.
Share the dimensions, finish or color, and quantity so we can review a suitable option and prepare a quotation.
Metric and custom dimensions
| Specification | Metric options |
| Thickness | 0.6 / 0.8 / 1.0 mm |
| Coil width | 50 / 60 / 70 / 80 / 90 / 100 mm |
| Roll length | 50 / 100 m |
| Custom profiles | Fold dimensions and profile geometry to be confirmed against a drawing or sample |
Flat and folded-edge coils require different width definitions when ordering.
For folded-edge coil, a 100 mm unfolded width does not necessarily produce a 100 mm finished return depth.
Account for the material taken up by the folds, or verify the effective sidewall height. Otherwise, the finished letter may be too shallow or the face-attachment points may not align.
For automatic letter-bending equipment, also specify the coil core inside diameter (ID), roll length or weight, and whether the quoted thickness refers to the bare aluminum substrate or the coated material.
Material and temper
Alloys such as 1050, 1060, 3003, 3105, 5005, and 5052, together with tempers such as H14, H24, H26, and H34, may be evaluated for the intended forming process. The exact alloy-and-temper combination must be confirmed for the selected coil.
For projects considering 3003-H14, see our 3003 aluminum coil page for information on the base material.
Colors, coatings and two-sided finishes
Henan Chalco offers a selection of channel letter coil colors and surface finishes. Single- and double-sided options can be evaluated against appearance, LED illumination, and bending requirements.
Surface finishes and color options
- Prepainted / Prefinished: Available in various colors and gloss or matte appearances for letters requiring a finished exterior.
- Mill finish: Uncoated aluminum strip for customers planning further surface processing.
- Anodized finish: Decorative anodized surface; suitability for subsequent bending must be verified.
- Brushed / Mirror finish: Decorative brushed or mirror-like surfaces for dimensional signs requiring a metallic appearance.
- Protective masking: Single-side protective film may be evaluated to help reduce scratches during handling and fabrication.
For a closer look at coating systems, see our color-coated aluminum coil and strip information.
Common colors
Color options include black, white, matte black, natural aluminum, red, blue, green, brushed silver, and mirror gold. Custom shades and gloss levels can be evaluated against a RAL reference or physical color sample.
Black
White
Matte black
Natural aluminum
Red
Blue
Green
Brushed silver
Mirror gold
Ultra White / White reverse for LED channel letters
For LED channel letters, a coil may have a colored exterior and a white reflective finish on the inside. This interior surface helps reflect light within the letter cavity. With suitable LED spacing and return depth, it can support more uniform illumination and better use of available light.
A high-reflectance white interior may also provide opportunities to optimize LED placement and lighting costs. Any reduction in LED quantity should first be verified through testing of the finished sign.
A-side and B-side finish configuration
For coils with different finishes on each side, clearly identify the exterior-facing and interior-facing surfaces when ordering.
- Side A — Exterior face: The visible outer surface of the letter, specified in the required color and gloss or matte finish.
- Side B — Interior face: The inward-facing side of the letter, available for evaluation with white reverse or another backing finish.
For folded-edge and preformed profiles, confirm the fold direction together with the A-side/B-side finish orientation to avoid receiving material with the colors reversed.
Color matching and bend compatibility
For repeat orders or signage programs covering multiple locations, provide the approved RAL reference or physical color sample and agree on color, gloss, and batch acceptance criteria.
For tight-radius bends or adhesive-bonded channel letters, verify coating flexibility and adhesive compatibility using the intended material and assembly method before production.
When requesting a quote, include the coil type, surface finish, A-side and B-side colors, gloss, protective film, and quantity. Each combination is subject to order confirmation.
Advantages of aluminum channel letter coil
LED channel letters
Used to form the returns of illuminated LED channel letters for storefront and commercial signs.
Reverse / Halo-lit letters
Used for the sidewalls of reverse-lit and halo-lit dimensional letters.
3D non-illuminated letters
Used to make indoor and outdoor non-illuminated dimensional letters and brand logos.
Custom signage
Suitable for custom dimensional lettering in malls, wayfinding signs, and other signage projects.
Matching coils to channel letter bending and assembly
Channel letter coil must be matched to the actual letter-bending machine, feed system, and letter assembly method.
Even with the same nominal thickness and width, variations in profile, core size, or surface finish can affect feeding, bending, and attachment of the letter face.
Key checks for bending and assembly
| Fabrication stage | Potential issue | Purchasing and selection guidance |
| Machine feeding | The coil can slip, track off-center, or jam, affecting finished letter dimensions. | Provide the letter-bending machine make and model, and confirm the supported coil profiles, thicknesses, widths, and core IDs. |
| Slit-edge quality | Burrs can scratch the finish, disrupt feeding, or interfere with assembly. | Agree on burr limits and edge-quality requirements, particularly for automated processing or appearance-critical orders. |
| Bending and springback | Tight corners can cause coating cracks, dimension changes, or excessive springback. | Check the minimum bend radius against the letter shape, temper, coating, and tooling. Trial bending may be necessary. |
| Folded-edge forming | An incompatible formed edge can deform at corners, sustain damage, or prevent the letter face from fitting. | Check fold dimensions, fold direction, effective return depth, and the profiles supported by the machine. |
| Face attachment | Trimless or adhesive-bonded designs may be difficult to assemble if the profile, surface treatment, or adhesive is incompatible. | Provide the acrylic-face attachment method, adhesive type, and bonding location. Verify fit using representative samples. |
When is sample testing recommended?
Sample bending and assembly tests are recommended before bulk ordering when:
- You are changing channel letter coil specifications for the first time, particularly thickness or temper.
- You are switching from flat coil to a folded-edge or preformed profile, or introducing a new letter bending machine.
- The letters have tight-radius corners and demanding coating-appearance requirements.
- You are producing trimless letters and need to check the interaction of the coil surface, acrylic face, and adhesive.
If you already have a letter-bending machine, send the model, coil type, nominal thickness, width, and a cross-section drawing or photo of the finished letter. These details help us assess whether the material is compatible with your process.
Inspection and acceptance requirements
For channel letter coil, thickness, slit-edge condition, and coating quality directly affect machine feeding, bending, and the appearance of the finished sign.
Key quality checks
- Thickness and width: Verify dimensions and tolerances against machine-feeding requirements and the required finished return depth.
- Slit edges and winding: Check burrs, coil end faces, and core size to reduce scratching, tracking errors, and loading problems.
- Profile dimensions: Verify folded-edge dimensions, direction, and effective height for compatibility with the acrylic face.
- Coating and appearance: Check color, gloss, scratches, and coating integrity, including batch-to-batch differences.
- Bending performance: Under agreed test conditions, examine the substrate and coating after forming for cracks, peeling, or distortion.
Coating tests and standards
For prepainted channel letter coil, the following test methods may be specified as part of the order requirements:
- ASTM D4145 — Evaluates the flexibility of coatings on prepainted sheet under specified bending conditions.
- ASTM D3359 / ISO 2409 — Relevant methods for assessing coating adhesion or cross-cut behavior; the selected procedure and acceptance criteria must be specified.
- ASTM D7091 — Used to measure dry-film thickness where the coating and measurement method are applicable.
- Color matching — Agree on color and batch appearance acceptance criteria against the approved sample.
ASTM B209/B209M may be referenced for the aluminum substrate. EN 1396:2023 may be referenced for applicable coil-coated aluminum sheet and strip.
Packaging and shipping
Henan Chalco can arrange packaging to suit coil dimensions, roll weight, and shipping requirements. Options include individual cartons for easier handling, storage, and distribution.
- Individual packaging: Separately boxed coils help reduce rubbing damage during transit and handling.
- Coil protection: Core restraint, edge protection, and moisture-resistant packing can be specified to reduce deformation and surface scratches.
- Clear labeling: Labels may identify thickness, width, color, roll length, and batch details for receiving and inventory control.
- Shipping options: Cartons, pallets, and shipping arrangements are confirmed according to order quantity and destination.
Bulk ordering, customization and RFQ
Henan Chalco can review bulk supply and customization requests for flat, folded-edge, Arrow-style, and preformed channel letter coil profiles.
Specifications, colors, profiles, and packaging can be reviewed against the needs of sign fabricators, sign-material distributors, and project buyers.
Customization and ordering options
| Customization item | Options and requirements |
| Coil dimensions | Nominal thickness, coil width, roll length, core size |
| Return profiles | Flat, single- or double-folded-edge, Arrow-style, and preformed profiles; special cross-sections evaluated using drawings or samples |
| Surface finishes | Prepainted, mill finish, anodized, and selected decorative finishes |
| Colors & protection | Custom colors / RAL references, white reverse, A-side/B-side finishes, protective film |
| Bulk packaging | Confirm roll labeling, individual roll specifications, boxing, and shipping protection per order |
Available combinations of sizes and customization options are subject to order confirmation.
What to include in your RFQ
To help us review your specifications and quote efficiently, please include the following information:
- Coil type: Flat, folded-edge, or preformed; attach a drawing or sample photo for special profiles.
- Dimensions: Thickness, width or return depth, roll length, and required tolerances.
- Finish and color: Exterior color, interior finish, RAL reference or color sample, and protective film.
- Machine and assembly: Letter bending machine model and acrylic-face attachment method, where special requirements apply.
- Order details: Quantity, destination, packaging requirements, and inspection documents requested.
For distributor restocking orders, provide the current SKU, approved color sample, and labeling requirements to help maintain consistency across deliveries.
Request Channel Letter Coil Pricing
Send your coil specifications, profile drawing, or sample requirements. Henan Chalco can review the proposed supply configuration and prepare a quotation.
MOQ, stock availability, pricing, and lead time are confirmed based on the final specifications, finish, order quantity, and delivery requirements.
Related products
Related aluminum coil, strip, and surface-finished materials may also be useful when selecting substrates, colors, finishes, and forming properties for channel letters.
3003 Aluminum Coil
5052 Aluminum Coil
Aluminum Coil and Strip
Color Coated Aluminum Coil and Strip
Anodized Aluminum Coil
3105 Aluminum Sheet and Coil
FAQ about aluminum channel letter coil
Does aluminum channel letter coil include the acrylic face or trim cap?
No. Channel letter coil is used primarily for the sidewalls, or returns. Acrylic faces, trim caps, and LED modules are separate components.
If a preformed or Channelume-type system is offered with accessories, confirm exactly which components are included in that order.
Does folded-edge coil width equal the finished return depth?
Not always. A folded edge consumes part of the unfolded strip width, so the effective return depth depends on the fold dimensions and cross-section. Specify the required finished sidewall height or supply a profile drawing.
How do I estimate the amount of channel letter coil needed for a project?
Estimate the total developed length of the sidewalls for all letters, then allow for joints, cutting waste, test bends, and fabrication allowances.
For a 270 ft roll, calculate from the usable length and cutting plan rather than the number of letters alone.
How can I maintain color consistency between batches of prepainted channel letter coil?
For repeat orders, provide the approved color sample, RAL reference, and gloss requirement, and agree on the permissible color difference.
For multi-location or phased signage projects, retain the original approved sample as the reference for later deliveries.
Can you match coil material to an existing channel letter bending machine?
Henan Chalco can assess your existing coil sample, profile drawing, or purchasing specification to identify possible supply matches.
Provide the bending machine model, thickness, width, profile, and color requirements. Where needed, confirm the sample and bending performance before placing a bulk order.
Chalco can provide you the most comprehensive inventory of aluminum products and can also supply you customized products. Precise quotation will be provided within 24 hours.
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