Precision CNC Bending for Sheet Metal Parts
Get custom bent sheet metal parts from a trusted manufacturer with Laser cutting, bending, welding, and coating under one roof.
What is CNC Bending?
CNC bending transforms flat sheet metal into three-dimensional parts using computer-controlled press brakes. A punch forces the material into a V-shaped die, creating precise angles that hold their shape under load.
Unlike manual bending, CNC systems calculate exact punch positions, compensate for material springback automatically, and repeat the same bend thousands of times without drift.
This process sits at the heart of sheet metal fabrication. After laser cutting creates your flat pattern, bending adds the angles, flanges, and formed features that turn flat stock into functional enclosures, brackets, housings, and structural components.
CNC vs Manual Bending Comparison
| Factor | CNC Bending | Manual Bending |
|---|---|---|
|
Repeatability |
±0.02mm |
±0.5mm |
|
Springback Compensation |
Automatic |
Trial-and-error |
|
Complex Sequences |
Programmed |
Operator-dependent |
|
Setup Time |
Minutes |
Hours |
|
First-Piece Accuracy |
Yes |
Requires test pieces |
Our CNC Bending Capabilities
From small brackets to 3-meter panels. From prototype runs to monthly production. We match equipment, tooling, and process expertise to your specific requirements.
Flexibility to Match Your Project Requirements
Different projects require different approaches. Our three CNC press brakes give us the flexibility to optimize for your specific needs.
Precision That Meets Automotive Standards
Our press brakes deliver precision that satisfies IATF 16949 automotive requirements. If we can hold tolerances for automotive OEMs, we can hold them for you.
ZAKFAB vs. Industry Standard
| Specification | ZAKFAB | Industry Standard |
|---|---|---|
|
Back Gauge Positioning |
±0.02mm |
±0.05mm typical |
|
Angle Accuracy |
±0.5° |
±1° typical |
|
Springback Compensation |
Automatic |
Often manual |
|
First-Piece Accuracy |
Yes |
Often requires adjustment |
We Can Meet Your CNC Bending Requirements
Quick reference: what you need and what we deliver
Large panels up to 3 meters
- 3200mm max length
Tight tolerances
- ±0.02mm, ±0.5°
Multiple materials
- Steel, SS, Al, galvanized
Complex sequences
- 4+1 axis CNC
Quick turnaround
- 80+ V-dies in stock
Prototype to production
- No minimums
Downstream processing
- Under one roof
Certified quality
- IATF 16949
Not sure if your part fits our capabilities? Send your drawing, we’ll confirm feasibility and provide a quote within 24 hours.
Parts We Made With CNC Bending
From prototypes to high-volume production, we deliver precision bending parts for demanding applications.
Engineering Precision That Sets Us Apart
What separates capable bending operations from basic job shops is how they handle the variables that affect real-world accuracy.
Automatic Springback Compensation
Every material wants to spring back after bending. Our CNC systems calculate springback automatically based on material type, thickness, and bend angle—delivering first-piece accuracy without wasted material.
| Material | Springback | Our Solution |
|---|---|---|
| Cold-rolled steel | 1-3° | Standard CNC compensation |
| Stainless steel | 3-5° | Increased overbend + adjusted tonnage |
| Aluminum | 2-4° | Reduced tonnage + radius adjustment |
| High-strength steel | 4-7° | Simulation-verified parameters |
Intelligent Bend Sequencing
Complex parts with six or more bends require careful planning. Bend in the wrong order and you create collisions between the part and tooling.
Our HC1103's intelligent programming system analyzes part geometry and generates optimized bend sequences automatically. This eliminates trial-and-error setup and reduces programming time by 40%.
Sheet Metal Materials for CNC Bending
We maintain tooling and process parameters optimized for the materials most common in precision sheet metal fabrication.
| Material | Common Grades | Thickness Range | Bending Notes |
|---|---|---|---|
|
Cold Rolled Steel |
SPCC, SPCD, DC01, DC03 |
0.5mm – 6.0mm |
Most common; predictable springback; ideal for enclosures |
|
Stainless Steel |
SUS304, SUS316, 430 |
0.5mm – 4.0mm |
Higher springback; requires compensation; work-hardens |
|
Aluminum |
5052, 6061, 1060, 3003 |
0.8mm – 5.0mm |
Soft; minimal springback; watch grain direction on tight radii |
|
Galvanized Steel |
SGCC, DX51D, G90 |
0.5mm – 3.0mm |
Coating preserved during bending; no flaking at bend line |
|
Pre-painted Steel |
PPGI, PPGL |
0.5mm – 2.0mm |
Protective film prevents scratches; wider radii recommended |
|
Copper & Brass |
C11000, C26000 |
0.5mm – 3.0mm |
Soft; forms easily; used in electrical applications |
Get Your Quote Now
Send us your requirements and we’ll respond within 24 hours with pricing, lead time, and DFM feedback.
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Why Choose ZAK
500+ global leading companies trust us to deliver their parts on time with quality guaranteed, every time. Here’s why.
Integrated Manufacturing
Laser cutting, bending, welding, finishing, assembly—all in-house. One PO, one quality contact, one delivery.
Engineering-First Approach
12 engineers (avg 11 years experience) review every project. Free DFM analysis catches problems early.
ISO & IATF Certified
We meet quality standards required by Honda, Toyota, VW. This discipline applies to every part we make.
40 Years expertise, Still Growing
Since 1985, grown to 66,000 sqm and 299 employees. We'll be here when you need us.
Quality Control for CNC Bent Parts
Bending creates specific failure modes that generic quality systems miss. Our protocols address bending-specific variables.
Bending Quality Inspection Points
| Checkpoint | Method | Frequency |
|---|---|---|
|
Angle verification |
Digital protractor, CMM |
Every first article; SPC on production |
|
Flange length |
Caliper, CMM |
Per control plan |
|
Flatness |
Surface plate, feeler gauge |
Per drawing specification |
|
Cumulative tolerance |
CMM, fixture check |
Critical dimensions on multi-bend parts |
|
Surface condition |
Visual, 10x magnification |
100% inspection |
IATF 16949:2016
Automotive quality management system. If we meet automotive tolerances, we meet yours.
ISO 9001:2015
Documented procedures, calibrated equipment, and traceable records.
ISO 14001:2015
Environmental management system for responsible manufacturing practices.
CNC Bending vs. Other Forming Methods
Understanding when CNC bending makes sense—and when alternative processes work better.
| Method | Best For | Limitations | ZAKFAB Offers |
|---|---|---|---|
| CNC Press Brake Bending | 50-5000 pcs; complex geometries; prototypes | Slower than roll forming for simple profiles | Primary Service |
| Roll Forming | High-volume continuous profiles; uniform cross-section | High tooling cost; not economical below 10K pcs | Not Offered |
| Stamping / Die Forming | Very high volumes (50K+); complex shapes in single hit | High die investment ($5K-50K+); long tooling lead time | Limited |
When CNC Bending is Your Best Choice
- You need 50 to 5,000 pieces with multiple bend configurations
- Your parts require integrated downstream processing
- Design changes are likely
- You're prototyping and need fast iteration
- Parts are large format (up to 3200mm)
When to Consider Alternatives
- Simple profiles in very high volumes → Roll forming
- Complex 3D shapes in 50,000+ annual volume → Progressive stamping
- Consistent parts with zero design changes → Dedicated tooling
Not sure which process fits? Send your drawing and we'll recommend the optimal approach.
Design for Manufacturability
Smart design decisions reduce cost, improve quality, and accelerate delivery.
Minimum Flange Length
The most common bending design error: flanges too short to form reliably. Design shorter and the part won't form correctly regardless of equipment quality.
Bend Radius Consistency
Specify the same inside bend radius throughout your part when possible. Each radius change requires a tooling change. Consistent radii = faster setup + lower cost.
Hole-to-Bend Clearance
Holes too close to bend lines distort during forming. Maintain proper clearance to avoid deformation.
Grain Direction
Bending perpendicular to grain reduces cracking risk, especially on tight radii in aluminum and stainless. For critical parts, specify grain orientation on your drawing.
File Formats We Accept
Complete Sheet Metal Fabrication Services
Laser Cutting Services
Precision flat patterns cut on fiber laser systems. Your bent parts start with accurately cut blanks from the same facility.
Welding & Assembly
MIG, TIG, and spot welding for bent part assemblies. Fixturing and inspection maintain dimensional accuracy through joining.
Surface Finishing
Powder coating, plating, anodizing, and other finishes. Complete parts ready for your assembly line.
Ready to Get Started?
Whether you have detailed CAD files or just a napkin sketch, we’re ready to help bring your project to life. Start with a quote request, or schedule a call to discuss your requirements.