NC series · Air or mechanical pilot release
Servo Roll Feed for Stamping Presses
The feed length each die and part needs, entered on a touchscreen.
See how this servo roll feed meters the strip, then opens its rolls for the die pilots with an air cylinder or the press stroke. Then choose your model by strip width and thickness.
How the servo roll feed works 60-second demonstration
Illustrative 3D demonstration of a Henli servo roll feed (NC series); roll opening enlarged in the X-ray views.


The servo roll feed up close
One Servo Drive, Two Ways to Release the Rolls
In North America this machine is called a servo roll feed or servo feed, in Europe a servo roll feeder, and in Asia and the Middle East an NC servo feeder, NC roll feeder, NC feeder or NC feeder machine. All of these names describe one unit: a servo drive meters the strip into the die, and a pilot release opens the rolls for the die pilots.
Henli NC servo feeder machine is a programmable servo roll feeder for power press and punching line automation. It feeds metal coil strip into a power press, punching machine, hydraulic press, laser cutter, shearing machine, or stamping automation line with stable synchronization and fast model changeover.
As an NC servo roll feeder manufacturer, Henli supplies models covering 200 mm to 1600 mm feeding width and 0.2–6.0 mm material thickness by series, with automatic roll feeding for press lines that need faster setup and repeatable feeding pitch.
- Servo drive. A servo motor turns the lower feed roll through a timing belt; a gear pair drives the upper roll with it.
- Hard-chrome feed rolls. Series A, B and C use one upper and one lower roll; Series D uses two pairs for 1.0–6.0 mm stock.
- Touchscreen and remote handle. Enter the feed length, feeding speed and multi-stage programs on the 7-inch touchscreen. This shortens setup time when changing dies or part sizes. A remote handle is also included.
- Separate control cabinet. The electrical cabinet stands apart from the feeder, which helps reduce vibration transfer to the controls.
- Pneumatic or mechanical release. Chosen by press speed and installation; both are shown in the demonstration above.
- Factory direct. Built in our own plant and sold at factory prices; standard models usually ship within 7 days and carry a 2-year warranty.
Upgrade path
Why Upgrade to an NC Servo Feeder Machine?
For factories moving from manual feeding, air feeders, or fixed mechanical roller feeders, an NC servo feeder machine adds programmable length control, repeatable feeding, and easier product changeover. It is especially useful when one press line must handle many part sizes or when material saving is important.
More stable feeding control
Pneumatic air feeders are economical, but feeding stability can be affected by air pressure, sealing condition, and mechanical wear. NC servo feeding uses motor-driven length control for more consistent repeated feeding in stamping production.
Faster job setup
Mechanical roller feeders can be fast, but feed length adjustment is usually tied to mechanical settings. With an NC servo roll feeder or automatic roll feeder, operators set feeding pitch and speed on the touchscreen instead of changing rod-driven adjustments.
Better production continuity
The feeder can synchronize with the press signal, support inching during die testing, and stop the line when optional end-of-material detection is configured. This helps reduce manual handling around the press area.
Product description
NC Servo Feeder Machine Product Description: Servo Roll Feeder for Press Automation
This NC servo feeder machine pulls coil strip from the upstream decoiler or straightener, measures the programmed feeding length with the servo drive, and delivers the strip into the press die or downstream process at the correct timing. It can be supplied as a standalone automatic roll feeder or configured with coil handling equipment for a complete press feeding line.
- Servo motor and drive: Yaskawa servo system configured for programmable length control.
- PLC controller: Mitsubishi PLC for feed programs, signal handling, and operator setup.
- Operation interface: 7-inch touchscreen plus remote handle.
- Release mode: pneumatic release or mechanical release according to press speed and installation condition.
- Feeding length: 0-9999 mm programmable feeding length.
- Feeding direction: left to right or right to left according to line layout.
Best-fit production scenarios
- Stamping press (power press) and punching machine feeding automation.
- Progressive die stamping with frequent pitch changes.
- Traditional punch press retrofit where electronic signals or cam setup must be added.
- Hydraulic press, shearing machine, laser blanking, and cut-to-length feeding.
- Thin strip feeding for terminals, connectors, lead frames, and copper or stainless steel parts.
- Zigzag feeding for circular blanking, kitchenware, saw blades, and motor lamination applications.
Engineering features
Key Features of Henli NC Servo Roll Feeder Machine
Servo drive feeding control
The Yaskawa servo motor and Mitsubishi PLC combination supports stable length control, programmable speed, and repeatable synchronization with the press signal.
Hardened chrome feeding rollers
The feeding rollers are made from bearing steel with heat treatment and hard chrome plating. This supports wear resistance and helps protect coil surfaces when the roller pressure is set correctly.
Touchscreen setup
Operators can input feeding length, feeding speed, and multi-stage feeding programs on the touchscreen, which shortens setup time when changing dies or part sizes.
Separated control box
The independent electrical control box helps reduce direct vibration transfer from the press area to the electronic components.
Timing and safety signals
The feeder can connect to press cam signals for feeding and release timing. Optional end-of-material detection can stop the line when the coil runs out.
Selectable configurations
Choose pneumatic release, mechanical release, heavy-duty roller configuration, or zigzag moving frame according to press speed, material thickness, part shape, and line layout.
Model selection
Servo Roll Feed Models and Specifications: NC-200 to NC-1600
Select the NC servo feeder model by maximum material width, maximum thickness, material strength, feeding pitch, press speed, and whether the feeder must release mechanically or pneumatically during the press stroke. Series A covers 0.2–2.2 mm (0.008–0.087 in), Series B 0.5–3.2 mm (0.020–0.126 in), Series C 0.5–4.5 mm (0.020–0.177 in), and Series D, with four rolls, 1.0–6.0 mm (0.039–0.236 in).
| Specification | NC-200 | NC-300 | NC-400 | NC-500 | NC-600 | NC-800 | NC-1000 | NC-1300 | NC-1600 |
|---|---|---|---|---|---|---|---|---|---|
| Feeding width | 200 mm | 300 mm | 400 mm | 500 mm | 600 mm | 800 mm | 1000 mm | 1300 mm | 1600 mm |
| Series A thickness | 0.2-2.2 mm | ||||||||
| Series B thickness | 0.5-3.2 mm | ||||||||
| Series C thickness | 0.5-4.5 mm | ||||||||
| Series D thickness | 1.0-6.0 mm | ||||||||
| Speed reference | 24 m/min | ||||||||
| Accuracy reference | ±0.05 / 100 mm; ±0.02 mm is application-dependent when pilot pins and die conditions support it | ||||||||
| Roller configuration | Series A / B / C: upper 1 + lower 1; Series D: upper 2 + lower 2 | ||||||||
| Release type | Pneumatic (solenoid valve and air cylinder) or mechanical (press-driven) pilot release | ||||||||
| Power supply | 380 V, 3-phase, 50 Hz standard; other voltages on request | ||||||||
| Motor power A series | 1.0 kW | 1.0 kW | 1.5 kW | 1.5 kW | 2.0 kW | 2.6 kW | 2.6 kW | 2.9 kW | 4.4 kW |
| Motor power B series | 1.0 kW | 1.5 kW | 1.5 kW | 2.0 kW | 2.0 kW | 2.6 kW | 2.6 kW | 2.9 kW | 4.4 kW |
| Motor power C series | 1.5 kW | 2.0 kW | 2.0 kW | 2.6 kW | 2.6 kW | 2.9 kW | 4.4 kW | 4.4 kW | 5.5 kW |
| Motor power D series | 1.5 kW | 2.0 kW | 2.0 kW | 2.6 kW | 2.6 kW | 4.4 kW | 5.5 kW | 5.5 kW | 7.5 kW |
For Series C and Series D selection, confirm the maximum thickness at maximum width, the maximum width at maximum thickness, material type, tensile strength, feeding pitch, required strokes per minute, and press model before final quotation.
Feeding Thickness Reference for Series A & B
| Model | 0.2 mm | 0.6 mm | 1.0 mm | 1.2 mm | 1.5 mm | 1.8 mm | 2.2 mm | 2.5 mm | 3.2 mm |
|---|---|---|---|---|---|---|---|---|---|
| NC-200 | 200 | 200 | 200 | 200 | 200 | 180 | 160 | 120 | 100 |
| NC-300 | 300 | 300 | 300 | 300 | 280 | 220 | 200 | 150 | 120 |
| NC-400 | 400 | 400 | 400 | 400 | 400 | 320 | 300 | 250 | 180 |
| NC-500 | 500 | 500 | 500 | 500 | 500 | 420 | 350 | 300 | 220 |
| NC-600 | 600 | 600 | 600 | 600 | 580 | 500 | 480 | 400 | 320 |
| NC-800 | 800 | 800 | 800 | 800 | 800 | 700 | 620 | 550 | 500 |
| NC-1000 | 1000 | 1000 | 1000 | 1000 | 1000 | 950 | 800 | 710 | 600 |
| NC-1300 | 1300 | 1300 | 1300 | 1300 | 1200 | 1000 | 850 | 750 | 650 |
| NC-1600 | 1600 | 1600 | 1600 | 1600 | 1550 | 1300 | 1000 | 800 | 720 |
NC-Series C: standard capacity
The C model uses one set of feeding rollers: one upper roller and one lower roller. Two cylinders control the upper roller for release.
NC-Series D: heavy-duty capacity
The D model adds another roller set for four rollers in total: two upper rollers and two lower rollers. This structure is used for heavier material requirements.
A thick plate NC servo feeder or high-thickness servo roll feeder must be selected from the actual width-thickness envelope, not from the model name alone. Confirm material grade and tensile strength, maximum width at maximum thickness, feed pitch, required SPM and press conditions before assigning a Series D model.
Type selection
Servo Roll Feed Types: Pneumatic or Mechanical Pilot Release
The release method and moving mechanism should match the press type, speed range, part shape, and installation space. For standard servo feeder for press lines, pneumatic and mechanical release are the main choices. If the production target is circular blanking, lamination stamping, or higher-speed short-pitch work, compare zigzag or high speed servo feeder options before quotation.
Pneumatic NC Servo Feeder
Uses a solenoid valve and air cylinder to lift the upper roller for material release. It is widely used because installation is flexible and it can be adapted to many traditional presses, hydraulic presses, shearing machines, and laser cutting lines.
Mechanical NC Servo Feeder
Uses a physical release rod connected with the press ram or slider action. It is selected when short-step, high-speed stamping needs immediate mechanical release and close synchronization with the press stroke. For dedicated lamination or higher-speed precision feeding, compare high speed servo feeder options.
Zigzag NC Servo Feeder
Adds a lateral moving frame so the strip can shift from side to side during feeding. It is used for circular blanking, motor laminations, saw blades, kitchenware, and applications where nesting efficiency matters. For dedicated two-axis blanking layouts, see zigzag servo feeder models.
Standard control configuration
Every model in the NC series uses the same control package: a Yaskawa servo motor and drive, a Mitsubishi PLC with the touchscreen, and Schneider electrical components in the separate cabinet. The zigzag feeder adds a second servo axis for the side-to-side movement. Other brands, such as Omron, can be fitted on request.
- Servo: Yaskawa motor and drive; two axes on the zigzag feeder.
- PLC: Mitsubishi, programmed from the 7-inch touchscreen.
- Electrical components: Schneider breakers and contactors.
- Power supply: 380 V, 3-phase, 50 Hz as standard; other voltages built to match your local supply.
- Other brands: Omron or another preferred brand on request.


Pneumatic release
Best for general retrofit projects, medium-speed production (about 80 strokes per minute, depending on feed length, material and tooling), and factories that need flexible installation without adding a mechanical release device to the press slide. On the press timing signal, a solenoid valve sends air to the release cylinder.
Mechanical release
Best for high-speed, short-pitch stamping where release timing must follow the press motion directly: about 100–180 strokes per minute, depending on feed length, material and tooling, and the speed can be customized for the application. Installation needs enough space and a suitable press structure.
Zigzag feeding
Best when the part shape is round or nested and the main goal is to reduce scrap between blanking positions.
Pilot release: when the die uses pilot pins, the rolls open briefly on each stroke so the pins can locate the strip, then grip again for the next feed. Read why a stamping feeder needs a pilot release.
Related technical guides for selection, installation, and commissioning
Complete installation video
How to Install an NC Servo Feeder on a Punch Press
This 16-minute walkthrough shows the complete path from mounting-plate preparation and feeder alignment to cable connections, strip loading, commissioning and the first test run.
Full setup, connection and test-run demonstration
Use the video to understand the installation sequence and the handoff between mechanical mounting, electrical connections, material loading and commissioning.
Installation boundary: Use the video as a process reference. Final terminal assignments, voltage, signal logic, guarding, lockout and acceptance steps must follow the supplied electrical drawings, feeder model documentation, press interface and site safety procedure.
Applications and cases
Servo Roll Feed Case Studies for Stamping Presses and Coil Feed Lines
NC servo feeder machines can support standalone press feeding, traditional press retrofits, coil-fed laser cutting, shearing, cut-to-length lines, and integrated press automation systems. Case photos show how the feeder sits beside presses, straighteners, laser cutting, shearing, and automated stamping lines.
Case 1: Integration with hydraulic press
The feeder is synchronized with a hydraulic press for deep drawing and thick plate processing where stable material positioning is important during longer press strokes.
Case 2: Retrofitting traditional punch presses
The feeder replaces older manual or mechanical feeding methods so an existing press can gain programmable feed length and more consistent strip delivery.
Case 3: Dual-strip feeding solution
Two strips can be processed simultaneously for suitable products, helping manufacturers improve output when part shape and press layout allow dual feeding.
Case 4: Feeding with integrated straightener
For high-tensile or coil-set material, an integrated straightening device can help flatten the strip before it enters the die. When one compact machine should uncoil, straighten and feed, see the NCHL 3-in-1 decoiler straightener feeder.
Case 5: Copper strip feeding
For copper and other non-ferrous materials, correct roller pressure and feeder setup help maintain feeding consistency while reducing the risk of strip deformation.
Case 6: Mirror stainless steel handling
For decorative or film-protected materials, hardened chrome rollers and suitable pressure adjustment help protect the visible surface during feeding.
Case 7: Long-span production line
When the feeder works with a decoiler and upstream support equipment, the line can maintain controlled strip movement over a longer layout.
Case 8: Two-axis zigzag nesting
The zigzag mechanism shifts the strip laterally to improve nesting for circular blanking, helping reduce scrap in suitable high-volume applications.
Case 9: Progressive deep drawing
Stable feed pitch supports progressive operations for circular components such as shells, housings, and drawn hardware parts.
Case 10: Automated hinge production
An NC servo feeder can be part of a hinge production line where punching, curling, and forming steps require consistent strip advancement.
Case 11: Coil feeding for laser cutting
Coil feeding reduces repeated sheet loading and supports continuous laser blanking when the downstream laser system and line layout are suitable.
Case 12: Cut-to-length and shearing
The feeder delivers programmed lengths into the shearing machine to form a compact cut-to-length process for rectangular blanks. For project inputs, interface responsibilities, and verification planning, see the feeder–shear integration guide.
Case 13: Construction hardware production
For brackets, connectors, and reinforcement plates, the feeder can be integrated with decoiling and straightening equipment for continuous press feeding.
Case 14: Household appliance manufacturing
Large-format metal panels and appliance chassis require stable feeding into high-tonnage presses, especially when visible surface quality matters.
Case 15: Automotive parts stamping
Automotive stamping lines often require stable feed pitch, careful strip support, and compatibility with high-tensile material and large press equipment.
Industry fit
Applications for NC Servo Feeders in Global Manufacturing
Electronics and terminals
Short-pitch feeding for connectors, lead frames, monitor brackets, and precision electrical components.
Automotive stamping
Press feeding for structural brackets, seat rails, chassis reinforcement parts, and other coil-fed stamping work.
Household appliances
Stable sheet and strip feeding for refrigerator panels, air-conditioner chassis, water heater parts, and appliance hardware.
Construction hardware
Feeding automation for shelving parts, heavy-duty connectors, reinforcement plates, and architectural hardware.
Laser and shearing lines
Continuous coil feeding for laser blanking, cut-to-length lines, and programmed shearing applications.
Circular blanking
Zigzag feeding for round plates, kitchenware, saw blades, and motor lamination nesting.
Resource center
NC Servo Feeder Resources: Select, Install, Troubleshoot and Apply
Start with the model and capacity information on this page, then choose the guide that matches your next step: selecting a model, installation and service, troubleshooting, or industry applications.
Choose and buy
Compare architecture, required inputs, cost scope and supplier evidence before selecting a model.
Install, integrate and accept
Move from site readiness and mounting through controls, commissioning and measurable acceptance.
Diagnose by symptom
Begin at the diagnosis center when the observed symptom has not yet been isolated.
Explore industry applications
Use representative application hubs to translate feeder selection into material, tooling and process requirements.
Get the Right NC Servo Feeder Model for Your Press Line
To recommend the correct NC servo feeder series and release type, send the main production data before quotation. If your maximum thickness and maximum width do not occur at the same time, please provide both conditions.
Every model in the NC series is for sale as a standalone servo roll feed or as part of a complete coil feed line with a decoiler and straightener. There is no list price: we quote after reviewing your material and press data (see NC servo feeder price factors for what drives the cost). We export to buyers in the United States and Europe; for a buyer-side view of sourcing from China, read China NC servo feeder manufacturer.
FAQ
NC Servo Feeder Questions Buyers Usually Ask
Pneumatic or mechanical pilot release: which do I need?
Both versions use the same servo drive, PLC and touchscreen, so a mechanical-release servo roll feed is not a mechanical roller feeder; the main difference is how the rolls open for the die pilots. Pneumatic release uses a solenoid valve and air cylinder on the press timing signal and needs nothing mounted on the press slide. For general retrofit projects it is usually easier to install and adjust, and it also suits hydraulic presses, shearing machines and laser cutting lines. With mechanical release, an actuator mounted on the press slide opens the rolls, so release timing follows the stroke directly; choose it for high-speed, short-pitch stamping when the press structure and installation space allow. Send your press model, strokes per minute and feed pitch, and we will confirm the release type.
Can the NC servo feeder be installed on an older punch press?
Yes, in many retrofit projects the feeder can synchronize with a traditional press by using a proximity switch, cam signal, or suitable release setup. Before confirmation, provide press photos, press model, stroke speed, and available installation space.
Can it feed high-tensile or sensitive-surface materials?
For high-tensile material, the line may need a straightener or an integrated straightener-feeder before feeding. For copper, mirror stainless steel, pre-painted coil, or film-protected material, roller surface treatment and pressure setting should be confirmed to reduce marking risk.
What feeding accuracy should I use for quotation?
The current model page lists ±0.05 / 100 mm as a standard accuracy reference. Higher precision depends on material condition, feeder setup, pilot pin use, die condition, press synchronization, and commissioning quality.
When should I choose a zigzag NC servo feeder?
Choose a zigzag feeder when the blank shape can be nested by shifting the strip laterally, especially for circular blanks, motor laminations, saw blades, cookware, and other parts where material utilization is a major cost factor.
What information is needed for a fast technical quotation?
Send material type, thickness range, width range, coil ID and OD, coil weight, feeding pitch, required speed, press model, line direction, layout restrictions, voltage, destination country, and photos or drawings of the product and existing press line.
What is an NC feeder, and is it the same as a servo roll feed?
In stamping, an NC feeder usually means a programmable servo roll feeder: it advances coil strip into the press die by a set length on each stroke. NC stands for numerical control: you enter the feed length, the feeding speed or a multi-stage program on the touchscreen, and the servo motor turns the feed rolls by that length. For this NC series, yes: buyers in Asia and the Middle East call it an NC feeder, NC roll feeder or NC feeder machine, and buyers in North America and Europe call the same machine a servo roll feed or servo roll feeder. When the die uses pilot pins, the pilot release opens the rolls for a moment so the pins can set the strip's final position.
How do I set the feed length when I change dies?
The feed length (pitch) follows the die and the part size, so it usually changes when you change dies. Enter the new length on the touchscreen, anywhere from 0 to 9999 mm (393.7 in), together with the feeding speed or a multi-stage program; the length itself needs no mechanical adjustment. Before production, inch the strip through the die or run at low speed, confirm the actual feed length, roller pressure, guides and pilot release, then switch to automatic. Feed timing comes from the press signal (a cam or proximity switch); see the signal cam setup and commissioning guide for the full procedure.
What affects the price of a servo roll feed?
There is no single list price for an NC servo feeder: we quote factory-direct prices for your configuration. The quotation depends mainly on feeding width, the thickness series (A, B, C or D), pneumatic or mechanical pilot release, options such as end-of-material detection, and whether the feeder is supplied alone or with a decoiler and straightener as a complete coil feed line. Voltage and destination country also affect the quotation. Send your material, feed pitch and press data for an itemized quote.
Do you build the feeders yourself, and what are the lead time and warranty?
Yes. We build the NC series in our own factory and sell at factory prices. Standard models usually ship within 7 days, and each feeder comes with a 2-year warranty.