HARSLE Tube Bending Machine Series
Tube Bending Machine CNC and NC Bending for Round, Square and Profile Tubes
Φ18 to Φ219 mm tube. 2D and 3D bending. Up to 6 CNC axes.
- 100+Countries Served
- 18+Years Experience
- 10,000+Machines Delivered
- Φ18–Φ219 mmTube diameter range
- ±0.1°Bending Precision
Tube Bending Machine Basics
What Is a Tube Bending Machine?
A tube bending machine bends round, square and rectangular tubes by clamping the tube to a bending die and drawing it around the die to a set angle, while a pressure die, wiper die and mandrel keep the tube wall smooth and round. CNC tube benders add servo axes that feed, rotate and bend the tube automatically, producing complex 2D and 3D parts in one setup.
HARSLE tube bending machines bend round, square and rectangular tubes from Φ18 to Φ219 mm into precise 2D and 3D shapes for exhaust and fluid lines, furniture, fitness equipment, HVAC tubing, handrails and vehicle frames. Choose the CNC ProCurve series for complex multi-plane parts or the NC hydraulic EcoCurve series for economical bending of larger tubes.
Size a tube bender by the largest tube diameter and wall thickness you bend, the tightest centerline radius, the longest straight length between bends, and whether your parts are 2D or 3D — that decides between an NC hydraulic bender and a multi-axis CNC bender.
- Tube bending series
- 2
- Tube diameter range
- Φ18–Φ219 mm
- ProCurve CNC bending
- 2D + 3D
- Bending precision (ProCurve)
- ±0.1°
- CNC axes
- Up to 6
- Max bending angle
- 190°
Our Product Range
Tube Bending Machine Solutions
CNC and NC tube benders for precise 2D and 3D bending of round, square and profile tubes.
CNC 3D Bending ProCurve Tube Bending Machine
CNC Tube Bending Machine Series (Φ18–Φ50 mm)
ProCurve CNC tube benders combine servo-driven feeding and rotation with hydraulic bending for precise, repeatable 2D and 3D tube shapes. Program multi-radius, multi-plane parts in one setup with ±0.1° bending and rotation precision and ±0.1 mm feeding precision.
- Servo feeding (Y) and rotation (B) for 2D and 3D bending
- ±0.1° bending precision, bending speed up to 150°/s
- Multi-layer dies for several radii without tool change
- Optional punching, cutting and 15-inch 3D control system
NC Hydraulic EcoCurve Tube Bending Machine
NC Hydraulic Tube Bending Machine Series (Φ38–Φ219 mm)
EcoCurve is an economical NC hydraulic tube bender for precise 2D bends in larger tubes, from Φ38 mm up to Φ219 mm. The programmable NC system stores bending angles, monitors each cycle in real time and returns the bending head automatically for fast, consistent production.
- Bends tube from Φ38 up to Φ219 mm
- Programmable NC control with real-time monitoring
- Bending radius R30–R400 mm, up to 190°
- Optional extended body, safety fence and light curtain
Core Strengths
Why Choose HARSLE
Providing industry-leading tube bending machine solutions with global support and guaranteed reliability.
Advantage 1Repeatable Bends, Part After Part
±0.1° Bending Precision
“Servo-controlled feeding, rotation and bending keep every angle, plane and length on target, so the first part and the thousandth part match.”
Servo Feeding & Rotation
Servo motors drive the feeding carriage and tube rotation with ±0.1 mm and ±0.1° precision for accurate 3D parts.
Stored Programs
Save every part program on the 10.5-inch touch screen and recall it for repeat orders in seconds.
Real-Time Monitoring
The control shows feeding, rotation and bending values live and adjusts automatically during the cycle.
Quality Components
Mitsubishi PLC and servo motors, HIWIN linear guides, Schneider electrics and a Weinview touch screen.
Advantage 2Ready to Bend from Day One
Bending Mold Set Included
“Every HARSLE tube bender ships with a matched set of dies for your tube size, and our tooling team builds custom dies for special shapes and radii.”
Bending & Clamp Dies
The bending die sets the radius; a hydraulically driven clamp die holds the tube so it cannot slip during the bend.
Mandrel & Wiper Die
The mandrel supports the inner wall and the wiper die prevents wrinkles on thin-wall and tight-radius bends.
Pressure Die
Applies radial pressure to guide the tube tightly against the bending die and prevent deformation.
Multi-Layer & Custom Dies
Two-layer and multi-layer dies give several radii in one setup; custom dies for square and profile tubes on request.
Advantage 3Built Around Your Parts
Options for Every Production Need
“Add exactly the functions your parts need — from punching and cutting on the machine to extended bodies for long tubes and full safety guarding.”
Punching & Cutting
Punch or drill holes and cut tubes to length before or after bending, saving separate operations.
Extended Body
A reinforced extended frame and mandrel holder support longer tubes with higher rigidity.
3D Control System
Optional 15-inch 3D control imports 3D drawings, simulates the bending motion and checks collisions in real time.
Safety Fence & Light Curtain
Guarding and light curtains stop the machine when an operator enters the danger zone.
Advantage 4Proven Industrial Excellence Worldwide
Export to 100+ Countries
“HARSLE machines work in factories across every major industrial region, backed by CE, SGS and ISO 9001 certification.”
International Compliance
CE, SGS, ISO 9001 and EAC certification for straightforward installation in global factories.
Global Reference
Tube benders shipped to furniture, automotive and fabrication customers in Europe, the Americas, the Middle East and Asia.
Diverse Industries
Exhaust and fluid lines, furniture, fitness equipment, HVAC tubing, handrails and vehicle frames.
Regional Expertise
We match voltage, safety and language requirements to your country before shipment.
Advantage 5Engineers Who Speak Your Language
Support Before and After Delivery
“From part feasibility to installation and training, HARSLE engineers help you get productive quickly — and stay productive.”
Pre-Sales Engineering
We review your drawings and recommend the model, axis configuration and dies before you order.
Installation & Training
On-site installation and operator training are available; remote setup support is included.
24-Hour Online Service
Online support around the clock, with an English manual and videos for operation and maintenance.
Multilingual Control
The control system runs in English, Chinese and Russian for easy operator training.
Advantage 6Two Decades of Metal Forming Know-How
18+ Years of Manufacturing Experience
“Founded in Nanjing in 2006, HARSLE builds bending, cutting and forming machines in a newly expanded factory with tripled production capacity.”
Proven Engineering
Bending know-how from press brakes, panel benders and rolling machines applied to tube bending.
In-House Manufacturing
Cylinders, frames and assemblies built and tested in our own factory.
Turnkey Solutions
Tube laser cutting, bending, welding and deburring from one supplier.
Continuous Improvement
Steady investment in product design and customer service since 2006.
Industrial Solutions
Industry Applications
Our tube bending machines shape round, square and profile tubes for industries worldwide. Select an industry to see the full process and machine line-up.
-
Automotive Exhaust & Fluid LinesMandrel-bent exhaust pipes, brake, fuel and coolant lines with precise 3D geometry.Explore industry solution
-
Metal FurnitureSmooth, consistent bends for chair, table, bed and shelving frames in round and square tube.Explore industry solution
-
Fitness EquipmentRepeatable frames, handles and uprights for strength machines, racks and benches.Explore industry solution
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HVAC & RefrigerationCopper and steel tubes, U-bends and refrigerant lines for heat exchangers and air conditioning.Explore industry solution
-
Bicycle & Motorcycle FramesMulti-plane bends for frame tubes, stays, handlebars, carriers and exhausts.Explore industry solution
-
Handrails & RailingsMark-free bends in stainless tube for stair rails, balustrades and guardrails.Explore industry solution
Selection Guide
How to Choose
Expert insights to help you choose the right tube bending machine for your tube size, shape and volume.
Understanding Model Numbers
The model number tells you the largest tube a machine bends: the series name gives the control type, the number is the maximum tube outside diameter in millimetres (rated on mild steel).
Model Naming Convention:
ProCurve 38 = Φ38 × 2 mm tube 38 = Max tube outside diameter (Φ38 mm)
× 2 = Max wall thickness at that diameter (2 mm)
ProCurve = CNC servo series, 2D + 3D bending (Φ18–Φ50)
EcoCurve = NC hydraulic series, 2D bending (Φ38–Φ219)
Selection Examples
Need Φ25 × 1.5 mm steel handlebars with bends in several planes?
Choose: ProCurve 25
Need Φ60 × 2 mm furniture frames with 2D bends only?
Choose: EcoCurve 63
2D or 3D Parts
Bends in one plane (frames, rails, U-bends) suit both series. Bends in several planes (exhausts, handlebars, fluid lines) need servo rotation — choose ProCurve, and add axes for full automation.
Bending Rules of Thumb
- ≥ 1.5 × DRadius with mandrel
- ≥ 2.5 × DRadius without mandrel
- 190°Max bending angle
- ±0.1°ProCurve precision
Tip: Send us a part drawing or 3D model — we check feasibility, die sizes and cycle time before you order.
Choosing the Right Size
Compare the standard models below, then check tube size, bend radius and material against your parts.
Model Quick Reference
| Model | Max tube (mm) | Bend radius (mm) | Max feed (mm) |
|---|---|---|---|
| ProCurve 18 | Φ18 × 1.6 | R5–R80 | 1450 |
| ProCurve 25 | Φ25 × 1.6 | R5–R100 | 1450 |
| ProCurve 38 | Φ38 × 2 | R15–R180 | 2200 |
| ProCurve 50 | Φ50 × 2 | R20–R250 | 2200 |
| EcoCurve 38 | Φ38 × 2 | R30–R200 | 1600 |
| EcoCurve 50 | Φ50 × 2 | R30–R250 | 2200 |
| EcoCurve 63 | Φ63 × 2 | R35–R300 | 2600 |
| EcoCurve 75 | Φ75 × 3 | R45–R400 | 2800 |
Larger EcoCurve models bend tube up to Φ219 mm — ask for the specification of your size.
Tube Size and Wall Thickness
Start from the largest tube outside diameter and wall thickness you bend. Ratings are for mild steel; stainless steel and thick-wall tube need more bending force, so choose the next size up for them.
Centerline Bend Radius (CLR)
The bend radius is set by the bending die. Tight radii on thin-wall tube need a mandrel and wiper die to prevent wrinkling and ovality; each machine lists its minimum and maximum radius.
Tube Bending Machine Comparison
ProCurve and EcoCurve together cover tube diameters from Φ18 to Φ219 mm. The key difference is control: servo-driven CNC for 2D and 3D parts, or NC hydraulic for economical 2D bending of larger tubes.
- Tube diameter range
- Φ18–Φ219 mm
- ProCurve CNC bending
- 2D + 3D
- Bending precision (ProCurve)
- ±0.1°
| Feature | ProCurve (CNC) | EcoCurve (NC) |
|---|---|---|
| Control System | CNC, 10.5" touch screen (15" 3D optional) | NC, programmable bending angles |
| Drive | Servo feeding & rotation + hydraulic bending | Hydraulic |
| Bending Type | 2D and 3D | 2D |
| Tube Range | Φ18 × 1.6 – Φ50 × 2 mm | Φ38 × 2 – Φ219 mm |
| Bending Radius | R5 – R250 mm | R30 mm and up (by tube size) |
| Max Feeding Length | 1450 – 2200 mm | 1600 mm and up (by model) |
| Max Bending Angle | 190° | 190° |
| Precision | ±0.1° bend & rotation, ±0.1 mm feed | Repeatable NC angle control |
| Best For | Complex 3D parts: exhausts, handlebars, fluid lines | Larger 2D bends: frames, rails, structural tube |
Need numbers for your parts? Try the free Metal Weight Calculator.
Tube Bending Machine Essentials
CNC Axes Explained
On a CNC tube bender, each axis is a servo motor that controls one movement of the tube. The more axes a machine has, the more of the bending cycle runs automatically — and the more complex the parts you can bend in a single setup, from simple 2D bends to fully automatic 3D shapes.
Axes marked optional are configured to order. Click to watch the CNC axes in action.
- Y axis feeds the tube forward to each bend position
- B axis rotates the tube to set the plane of the next bend
- C axis drives the bending arm to the programmed angle
- Z, X and A axes add die-layer changes, left/right bending and push assist
- All axes run from one program with ±0.1° and ±0.1 mm precision
- YY axis — FeedingThe servo carriage pushes the tube forward to each bend position.Standard
- BB axis — RotationTurns the tube between bends to set each bend plane for 3D parts.Standard
- CC axis — BendingA servo bending arm forms each bend to the programmed angle.Optional
- ZZ axis — Up-downMoves the bending head between stacked die layers for several radii.Optional
- XX axis — Left-rightShifts the bending head sideways to change dies or bend left and right.Optional
- AA axis — PushingPushes the pressure die with the tube to reduce wall thinning on tight bends.Optional
Choose Your Axis Configuration
2-AxisYB
Servo feeding and rotation with hydraulic bending — the economical setup for accurate 2D and 3D parts.
3-AxisYBC
Adds servo bending for faster cycles and finer angle control.
4–6-AxisYBCZXA
Adds Z, X and/or A axes for multi-layer dies, left/right bending and push assist — fully automatic complex 3D bending.
More axes means more servo motors and more automation. Our engineers recommend the right configuration for your parts.
Global Footprint
Global Success Stories
Every tube bending machine shipment and customer story HARSLE publishes appears here automatically. Filter by machine or country.
Smooth Tube Bender Delivery Experience for Seville Customer
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FAQ
Frequently Asked Questions
Answers to common questions about CNC tube bending machines and HARSLE tube benders
What is a CNC tube bending machine?
A CNC tube bending machine bends round, square and rectangular tubes by clamping the tube to a rotating bending die and drawing it around the die to a programmed angle. Servo axes feed the tube to each bend position (Y), rotate it to set the bend plane (B) and control the bending angle (C), so complex 2D and 3D parts are produced automatically and repeatably.
What is the difference between ProCurve and EcoCurve?
ProCurve is a CNC series with servo feeding and rotation for 2D and 3D bending of Φ18–Φ50 mm tube with ±0.1° precision. EcoCurve is an NC hydraulic series for economical 2D bending of larger tube from Φ38 up to Φ219 mm.
How do I read the model number?
The number is the maximum tube outside diameter in mm on mild steel: ProCurve 38 bends tube up to Φ38 × 2 mm, EcoCurve 75 up to Φ75 × 3 mm; larger EcoCurve models bend tube up to Φ219 mm. Choose a model with some margin for stainless steel or thick-wall tube.
What does the number of axes mean on a tube bender?
Each axis is a servo motor controlling one movement: Y feeding, B rotation, C bending, Z up-down, X left-right and A pushing. A 2-axis machine automates feeding and rotation; 3-axis adds servo bending; 4–6 axes add die-layer changes, left/right bending and push assist for fully automatic 3D bending.
When do I need a mandrel?
A mandrel supports the inside of the tube during bending. It is needed for thin-wall tube and tight radii (typically below 2.5 × the tube diameter) to prevent wrinkling, collapse and ovality, and to keep the inner wall smooth.
What is the minimum bending radius?
It depends on the machine and dies: ProCurve 18 and 25 bend down to R5 mm, ProCurve 38 to R15 mm and EcoCurve from R30 mm. As a guide, 1.5 × the tube diameter is achievable with a mandrel and 2.5 × without.
Can HARSLE tube benders bend square and rectangular tube?
Yes. With dedicated dies, the machines bend round, square, rectangular and profile tubes in steel, stainless steel, aluminum and copper.
Do you provide installation, training and warranty?
Yes. Each machine ships with a mold set, an English manual and videos. Installation and on-site training are available on request, and online support runs 24 hours a day. Ask our team for the warranty terms of your configuration.
Knowledge Center
Tube Bending Machine Guides & Resources
- How to Perform Die Replacement on a Tube Bending Machine Efficiently?
- What Are the Key Steps in Tube Bender Maintenance Setup?
- When Should You Perform a Tube Bender Emergency Check After Installation?
- How Does Tube Bender Installation Acceptance Work?
- Why Tube Bender Operator Training Is Critical After Installation
- Why Is Tube Bender Alignment Calibration Critical After Installation?
- How to Perform a Proper Tube Bender Trial Run?
- Tube Bender Installation Mistakes: How Can You Avoid Them?
- What Are the Key Points of Tube Bender Electrical Connection?
Get Started
Request a Quote
Tell us your tube size, material and part drawing — our engineers will recommend the right tube bender, axis configuration and dies.
- Machine SelectionModel, series and options matched to your parts
- Technical SupportBend feasibility checked on your drawings
- Detailed QuotationPrice, lead time, shipping and installation
- 24-Hour ResponseA real engineer replies within one business day
Tip: mention your material, thickness, largest part size and yearly volume for the most accurate quote.
