Multi-Material or Stainless Steel?
Material form decides MM or FM. The mapping is in the Channel Letter Material Guide.
- Confirm material format, maximum side height, radius, and required operations.
CHANNEL LETTER BENDING MACHINE SELECTOR
Compare 7 Channel Letter Bending Machines
Answer three practical questions to build a preliminary series shortlist. A SENQ engineer confirms the final configuration before quotation.
5,000 m² factory in Weifang · Building channel letter benders since 2016See why manufacturers choose SENQ
3-STEP SERIES SHORTLIST
Answer 3 Questions to Narrow the Starting Series
Tell us what you make, every material the same machine must handle, and your largest working size. No model knowledge or contact details required.
Compare All 7 Series- 1Application
- 2Material & Size
- 3Special Operations
Step 1 of 3
Complete the three steps to see your shortlist
Your preliminary shortlist and comparison links will appear here after Step 3.
WHAT IT IS
What Is a Channel Letter Bending Machine?
A channel letter bending machine reads a production file and forms metal strip, aluminum profile, or coil into the return of an illuminated letter. That return is the side wall of the letter, and it is the piece the machine finishes. Without a production file the machine cannot bend automatically. SENQ builds seven series and eleven models. Nine models are a channel letter bender. PF60 and PF80 are aluminum profile frame benders. The seven series are divided by material form and by return type, so the material and the return decide where to start. Cutting the face and the back, welding, and fitting the lighting are later shop steps. Those limits are listed in What These Machines Do Not Do.
HOW THE RETURN IS FORMED
How a Channel Letter Bender Forms the Return
Series-specific operations are named in the Channel Letter Notching, Flanging & Slotting Guide.
- 1
Load the production file
The machine bends automatically from a production file. Prepare the file with the Channel Letter DXF File Preparation Guide.
- 2
Feed the material
Feed flat strip, aluminum profile, or coil into the machine. The feeding mechanism changes by series and is listed in the Core workflow row of the comparison table.
- 3
Slot or notch each corner
Slotting prepares each bend. NF220 uses tooth notching for that step. Operation names and definitions are in the Channel Letter Notching, Flanging & Slotting Guide.
- 4
Bend the arcs and corners
The machine bends each arc and each corner so the return follows the outline in the production file. The result of this step is the formed return.
- 5
Hand the return to assembly
Face cutting, welding, and LED fitting happen after the return leaves the machine. Those steps are listed in What These Machines Do Not Do.
ALL SERIES COMPARISON
Compare All 7 Channel Letter Bending Machines
The seven series split on two facts: material form and return type. Material form covers flat strip, aluminum profile, Channelume or folding coil, and stainless steel, galvanized sheet, or iron. Return type covers an ordinary flanged return, a trimless (rimless) return, and a wide flat-aluminum return that is tooth-notched and edge-folded. Frames and lightbox profiles are separate: PF bends frames, not letters. When you complete the finder, the recommended series and any documented alternative are highlighted in the table. Narrow the choice with side height, material thickness, and minimum bending radius in Key Parameters That Decide the Series. How to read side height, including the 20 mm floor on AP, RF, TR, and MM, is on the Channel Letter Bender Price Comparison. A starting shortlist by job is on Channel Letter Bender Applications.
Tap a series to review its models, working range, and workflow.
Multi-Material Channel Letter BendersMM160 / MM200Mixed-material work and aluminum profile systems
- Materials
- Aluminum (profile, flat, channelume, and super aluminum), stainless steel, galvanized sheet, iron, and copper
- Work range
- Side height ≤160 / 200 mm; Al 0.3–1.2 mm; SS 0.3–1.5 mm; R≥3.5 mm
- Core workflow
- Automatic feed, straighten, cut, and dual-blade bend
Automatic Notching & Folding Aluminum BenderNF220Notched and folded wide flat-aluminum returns
- Materials
- Flat aluminum
- Work range
- Side height 20–220 mm; 0.8–1.1 mm; R≥8 mm
- Core workflow
- Feed, tooth notch, edge fold, arc bend, and cut off
Aluminum Profile & Sign Frame BendersPF60 / PF80Frames, shaped lightboxes, and decorative profiles
- Materials
- Aluminum profiles
- Work range
- Side height 8–120 mm; thickness 0.6–1.2 mm; confirm the arc against the cross-section drawing
- Core workflow
- Single-direction forming on PF60; single- and bidirectional forming on PF80
Stainless Steel Channel Letter BenderFM130 / FM220Stainless, galvanized, iron, and flat-aluminum letters
- Materials
- Stainless, galvanized, iron, flat aluminum
- Work range
- Side height 20–130 / 20–220 mm; 0.3–1.2 mm; R≥5 mm
- Core workflow
- Gripper feed, slot, alternating bend, and automatic punch
Aluminum Channel Letter BenderAP130Aluminum profiles, flat aluminum, folding coil, and Channelume
- Materials
- Aluminum profile, flat aluminum, folding coil, and Channelume
- Work range
- Side height ≤130 mm; 0.3–1.2 mm; R≥7 mm
- Core workflow
- Automatic feed, slot, and bend
Aluminum and Channelume Letter BenderRF130Aluminum profile, flat aluminum, and channelumeVerified RF130 feeding and bending assembly detail
- Materials
- Aluminum profile, flat aluminum, channelume
- Work range
- Side height ≤130 mm; 0.3–1.2 mm; R≥3.5 mm
- Core workflow
- Roller feed, slot, bend, and closed-loop correction
Trimless (Rimless) Aluminum BendersTR1 / TR2Compact rimless flat-aluminum letters
- Materials
- Flat aluminum and 3D soft-edge tape
- Work range
- Side height ≤100 mm; 0.3–0.8 mm; R≥3.5 mm
- Core workflow
- Automatic feed, slot, and bend
BUYER DECISION SUMMARY
Compare the Workflow Tradeoffs
A shortlist is a starting point, not a model promise. Use these four distinctions to decide which series deserves the next review.
When Automatic Notching & Folding Is the Focus
Automatic tooth notching and edge folding are defined in the Channel Letter Notching, Flanging & Slotting Guide.
- Confirm side height, thickness, radius, notch pattern, and edge-folding requirement.
When the Profile Section Points to PF
Choose PF60 for single-direction shapes. Choose PF80 when the profile requires either single-direction or bidirectional forming.
- Both models support an 8–120 mm side height; send the finished shape, cross-section, wall thickness, and required arc.
- Visual examples show PF60 only; they do not demonstrate the PF80 configuration or bidirectional forming.
AP130, RF130, or the MM Series?
Profile, flat strip, coil, and Channelume map to a series in the Channel Letter Material Guide.
- Send the material cross-section so an engineer can confirm the suitable series.
KEY PARAMETERS
Key Parameters That Decide the Series
Each row says what the parameter decides and where the line-wide limit sits. Model-by-model numbers stay in the comparison table above.
| Material and format | Material form, not only the metal name, decides the feeding and forming mechanism. The line bends metal. Which form belongs to which series is in the Channel Letter Material Guide. |
|---|---|
| Material thickness | Most series bend 0.3–1.2 mm. MM160 and MM200 take stainless steel up to 1.5 mm. Thicker aluminum or galvanized sheet is noted only when the order is placed. NF220 takes only 0.8–1.1 mm flat aluminum. |
| Side height | The tallest side on the line is 220 mm, on FM220 and NF220, and the limit is side height rather than the size of the letter. How to read side height is on the Channel Letter Bender Price Comparison. |
| Minimum bending radius | The minimum bending radius decides how small a letter, and how tight an inside arc, the series can form. The tightest published radius is R3.5 mm, on MM, RF130, and TR. PF frames have a nominal R50 mm, confirmed by a trial roll on the actual profile. Compare the tightest inside arc in your own file. |
| Required automatic operations | Which operation belongs to which series is in the Channel Letter Notching, Flanging & Slotting Guide. |
BEFORE THE FIRST LETTER
What You Need Before the First Letter
Have the shop-side items below ready before the first letter. Lead time, warranty, CE marking, and training are on Why Work With SENQ CNC for Channel Letter Benders.
Power Supply
The model specifications list 220 V. Voltage and plug type are configured to the destination standard, such as EU or US, as agreed in the quotation. Prepare a socket rated above the machine power (about 2,500 W for most models; MM and NF220 are 3,000 W and need a larger one), a secure ground, and a line not shared with heavy equipment. Add a voltage stabilizer if the supply is unstable.
Compressed Air
Every series except PF60 and PF80 needs a compressor: about 500 W, a tank of 10 L or more, a working pressure of 0.8 MPa, and an 8 mm air hose. MM needs 4 kW or more and 0.6 m³/min. FM air pressure must not fall below 0.4 MPa. PF does not use compressed air.
Computer and Software
Every machine ships with a computer. The software is installed and the parameters are set. Every model has a full English interface and a full Spanish interface, with every function open.
A Production File
Automatic bending requires a production file, and every model accepts DXF. Send the material, thickness, side height, and minimum radius with that file. Preparation steps are in the Channel Letter DXF File Preparation Guide.
Three Setup Checks
Every SENQ machine, including NF220 and the PF60/PF80 frame benders, uses three setup checks after delivery and after any change of material or tooling: feed length, automatic slotting, and arc-bending force. The software has a button for each. Measure the result, enter it back, and repeat until it matches.
Test Your Own File First
Request a customer-file test with a representative DXF. The default result is a recorded machine-run video. Live remote viewing with an engineer is available by appointment. For a letter near a machine limit, ship about 1 m of the same material batch for a real test bend. A file review alone is not a test bend.
OUTSIDE THE MACHINE
What These Machines Do Not Do
Every SENQ machine forms only a metal return or a frame. The work below is not done on any machine in the line.
| Faces, Backs, Welding, and Lighting | The machine forms the return only. Cutting the face and the back, welding, and LED fitting are later steps and need other equipment. With only the letter bender, the shop receives the return. |
|---|---|
| Acrylic or PVC Returns | The machines do not bend acrylic or PVC. They bend metal: aluminum, stainless steel, galvanized sheet, iron, and copper. Acrylic still works as the face, and the return is made in aluminum or stainless steel. |
| Solid, Carved, and Foam Letters | The line does not make flat-cut or carved solid letters, carved wood letters, or foam letters. |
| Vacuum-Formed and Heat-Formed Letters | The line does not make vacuum-formed letters or heat-formed acrylic letters. |
| Neon and LED Neon-Flex Letters | The line does not make neon-tube letters or LED neon-flex letters. |
| Returns Taller Than 220 mm | A return taller than 220 mm is outside every series and has to be made in sections. |
| Material Past the Series Limit | The line does not bend plate thicker than the published thickness limit of that series. |
| Stainless Trimless Letters | No machine forms both stainless steel and a trimless return. See Compact Rimless Channel Letters. |
| Frames on a Letter Bender | PF60 and PF80 bend frames, not letters, and a letter bender does not form frames. See Sign Frame and Lightbox Profile Bending. |
SELECTION FAQ
Before You Choose a Series
What does a channel letter bending machine do?
It forms metal strip, profile, or coil into a return from a production file. Face cutting, welding, and LED fitting happen outside the machine.
Which series should I check first for general channel-letter work?
Match the material and the return first, then compare documented side height, thickness, and minimum radius. The specification comparison lists the published limits. A quotation confirms the series.
When is NF220 the stronger fit?
NF220 is the focused series for automatic tooth notching and edge folding. See NF220 and Notched and Folded Channel Letter Returns.
Which series is for frames and shaped profiles?
Frames and shaped profiles start at PF. See PF60 / PF80 and Sign Frame and Lightbox Profile Bending.
How small a letter can the machines bend?
Compare the tightest inside arc in your file with the minimum bending radius: R3.5 mm on MM, RF130, and TR; R5 mm on FM; R7 mm on AP130; R8 mm on NF220. PF frames use a nominal R50 mm, confirmed by a trial roll on the profile.
What is the tallest return the line can bend?
No series goes beyond the tallest side named in What These Machines Do Not Do.
What do I need in the shop before the machine arrives?
The shop checklist is in What You Need Before the First Letter.
Which file formats do the machines accept?
Formats by model are on the Channel Letter Bender Price Comparison. How to prepare the file is in the Channel Letter DXF File Preparation Guide.
Can SENQ test my own file before I order?
Yes. The delivery form for a customer-file test is in What You Need Before the First Letter.
Can the machines bend acrylic or PVC returns?
No. The machines bend metal returns. Acrylic still works as the face, and the return is made in aluminum or stainless steel.
Can the power supply and plug match my country's standard?
Yes. Voltage and plug type follow the destination standard agreed in the quotation. The power note is in What You Need Before the First Letter. State the site voltage and plug type when you request a quotation.
What should I send for a reliable recommendation?
Send the material, thickness, side height, minimum radius, and a typical production file, prepared as described in the Channel Letter DXF File Preparation Guide.
REQUEST A SERIES RECOMMENDATION
Send Your Production Requirements
Share the application, material format and grade, thickness, maximum working dimension, minimum radius, required automatic operations, and a representative production file you can share after contact. A SENQ engineer will confirm the starting series and order-specific configuration before quotation. Submit the requirements securely to start that review.