Precision CNC Blanking Services

Eterna Global Solutions
C-52 Block-C, Sector 80
Noida Uttar Pradesh,
201306, India

CNC Blanking Services — Fiber Laser Cutting & CNC Punching for Precision Sheet Metal in India

Eterna Global Solutions LLP operates synchronized CNC blanking facilities at its Noida manufacturing unit, combining fiber laser cutting (up to 3 kW) and CNC turret punching to produce precision sheet metal profiles for enclosures, server racks, telecom cabinets, brackets, panels, and OEM assemblies. Our fiber laser cuts mild steel up to 16 mm, stainless steel up to 8 mm, and aluminium up to 6 mm, with positional accuracy of ±0.03 mm and cutting repeatability of ±0.05 mm across the full 3,015 × 1,515 mm bed.

Both machines are programmed through dedicated nesting and CAM software that optimizes sheet utilization, minimizes material waste, and generates machine-ready code directly from our design team’s CAD outputs. This integrated workflow eliminates manual programming errors and typically achieves 85–92% material utilization on production batches — compared to an industry average of 70–78% with manual nesting. For our customers, this translates directly to lower per-part material costs.

Our punching machines carry an extensive tooling library of 200+ standard tool stations, enabling distinctive pattern profiling, louvres, embossing, countersinks, and on-turret forming — reducing or eliminating secondary operations that add cost and lead time. The laser and punch operate in tandem on a 24-hour production schedule, with trained operators performing in-process dimensional checks on every batch using calibrated measuring instruments. All machines undergo preventive maintenance on a fixed monthly cycle to ensure consistent output quality and uptime.

Need precision-cut sheet metal parts?
Send your DXF, STEP, or drawing files — we respond with a blanking approach, material recommendation, and pricing within 24–48 hours.

Get a Blanking Quote Email DXF / Drawings

CNC blanking overview

Fiber laser + CNC punch working in tandem.

What is CNC blanking?

CNC blanking is the first manufacturing operation in sheet metal fabrication. It involves cutting flat sheet material into precise 2D profiles (blanks) using computer-controlled machines — either a fiber laser or a CNC turret punch press. These blanks then proceed to forming, welding, hardware insertion, and finishing. The accuracy of the blank directly determines the quality of every downstream operation, which is why blanking precision is critical to final part quality.

How Eterna blanks parts

We operate fiber laser and CNC punch in a synchronized cell. The laser handles contour cutting, fine features, and thick materials where thermal precision matters. The punch handles repetitive hole patterns, louvres, embossing, and on-turret forming where speed and secondary-operation elimination matter. Our nesting software decides which features go to which machine for optimal cost and quality on each job.

Why this matters for buyers: Synchronized laser + punch means you get the precision of fiber laser where it counts (contours, fine slots, thick material) and the speed of punching where it counts (repetitive holes, formed features) — in a single production cell, from one supplier, without splitting jobs across vendors.

Machine specifications at a glance

Quantified for vendor qualification.

3 kWFiber laser source power

3,015 × 1,515 mmLaser cutting bed size

±0.03 mmLaser positional accuracy

±0.05 mmCutting repeatability

16 mmMax MS cutting thickness

8 mmMax SS cutting thickness

200+Standard punch tool stations

85–92%Typical material utilization

6 mmMax aluminium laser thickness

30 tonnesPunch press tonnage

24-hourProduction operation

N₂ / O₂Assist gas system (nitrogen + oxygen)

For procurement teams: These machine specifications support vendor qualification assessments. Our fiber laser achieves burr-free edges on stainless steel up to 6 mm with nitrogen assist, and oxide-free cuts on mild steel up to 12 mm — reducing or eliminating post-cut deburring for downstream processes. Request a detailed machine capability sheet at info@itiseterna.com.

Blanking equipment (click to expand)

Fiber laser + CNC punch + assist gas + nesting software.

Fiber laser cutting machine3 kW • 3015 bed • ±0.03 mm

Our fiber laser is the primary profiling machine for contour cutting, intricate geometries, fine slots, small holes, and thick material processing. Fiber laser technology produces a narrower kerf width (typically 0.1–0.3 mm) than CO₂ lasers, resulting in less material loss and finer feature resolution.

Source: 3 kW fiber laser — 3× faster on thin sheets (<3 mm) and 2× more energy-efficient than equivalent CO₂ systems
Bed size: 3,015 × 1,515 mm — accommodates standard 1,250 × 2,500 mm and 1,500 × 3,000 mm sheet stock
Positional accuracy: ±0.03 mm across full bed travel; cutting repeatability ±0.05 mm
Thickness capacity: Mild steel up to 16 mm, stainless steel up to 8 mm, aluminium up to 6 mm, brass/copper up to 4 mm
Assist gas system: Nitrogen (N₂) for oxide-free, burr-free edges on stainless steel and aluminium; Oxygen (O₂) for fast cutting on mild steel and galvanized steel above 3 mm
Edge quality: Nitrogen-assist cuts on SS 304 produce edges smooth enough for visible enclosure surfaces without secondary deburring

CNC turret punch press30T • 200+ tools • on-turret forming

Our CNC punch press handles high-speed repetitive hole patterns, louvres, embossing, countersinks, and formed features directly on the turret — operations that would require separate secondary tooling if done after laser cutting. For parts with many identical features (e.g., perforated panels, ventilation grilles, mounting hole arrays), punching is significantly faster and more cost-effective than laser.

Tonnage: 30 tonnes pressing force — sufficient for forming, embossing, and louvre punching in materials up to 4 mm
Tooling library: 200+ standard tool stations including round, square, rectangular, oblong, D-shape, and custom special tools
On-turret forming: Louvres (for ventilation), lance-and-form tabs, countersinks, dimples, embossed ribs, and card-guide slots — eliminating separate press brake or stamping operations
Speed advantage: Repetitive hole patterns (e.g., a 47U rack panel with 200+ cage-nut holes) are 5–8× faster on punch than laser
Nibbling capability: For non-standard contours where dedicated tooling doesn’t exist, the punch can nibble profiles using standard round/square tools

Nesting & CAM softwareAuto-nest • common-line • DXF import

Nesting software is the bridge between our design team’s CAD outputs and the CNC machines. It takes flat pattern DXFs, arranges them optimally on standard sheet sizes, assigns features to laser or punch, generates NC code, and calculates material usage — all before a single sheet is loaded.

Auto-nesting: Algorithm-driven part arrangement achieves 85–92% sheet utilization vs. 70–78% industry average with manual nesting
Common-line cutting: Adjacent parts share a single cut line, reducing laser time and scrap on high-volume batches
Standard sheet sizes: 1,250 × 2,500 mm and 1,500 × 3,000 mm (other sizes on request from stock sheet suppliers)
Batch optimization: For recurring programs, nesting layouts are saved and versioned so each production run uses the same proven arrangement
Direct NC output: Machine code generated from software — no manual G-code programming, eliminating transcription errors

Assist gas systemN₂ + O₂ for edge quality control

The choice of assist gas during laser cutting directly determines edge quality, oxide formation, and whether secondary deburring is required. We maintain both nitrogen and oxygen supply lines integrated into the laser, switchable per job or even per feature within a single part.

Nitrogen (N₂): Used for stainless steel, aluminium, and visible-surface mild steel cuts. Produces bright, oxide-free, burr-free edges that are paint-ready without deburring. Essential for enclosures where cut edges are visible or where powder coating adhesion matters.
Oxygen (O₂): Used for mild steel and galvanized steel above 3 mm thickness. Produces faster cuts through exothermic reaction, with a thin oxide layer on the edge. Suitable for structural components, internal brackets, and parts that will be powder-coated or plated post-cut.
Thickness guidance: Mild steel ≤3 mm: N₂ or O₂ (buyer preference). MS 3–16 mm: O₂ recommended. SS all thicknesses: N₂ mandatory for clean edges. Aluminium: N₂ mandatory to prevent oxidation.

Buyer benefit: Because laser and punch operate in the same production cell, we assign each feature to the optimal machine — contours and fine slots to laser, repetitive holes and formed features to punch. This hybrid approach typically reduces blanking cost by 15–25% vs. laser-only processing for parts with mixed feature types (e.g., an enclosure side panel with ventilation louvres + mounting slots + cable entry cutouts).

Fiber laser vs. CNC punch — when we use each

Selecting the right process per feature.

Best suited for fiber laser

Contour profiles — any non-standard perimeter shape, radius, or curve. Fine features — slots narrower than 2 mm, small holes (<1 mm diameter), tabs, and bridges. Thick material — anything above 4 mm where punch tonnage becomes a limitation. Stainless steel and aluminium — where nitrogen-assist produces oxide-free edges. Prototypes and short runs — no tooling setup required, so the first part costs the same as the hundredth.

Best suited for CNC punch

Repetitive hole patterns — cage-nut squares, mounting holes, ventilation grids with identical features repeated hundreds of times. Formed features — louvres, countersinks, embossed ribs, dimples, lance-and-form tabs that would otherwise require a separate press operation. High-volume thin material — for parts in 0.5–3 mm material with mostly holes and simple perimeters, punching is faster and cheaper per part than laser.

Combined laser + punch (hybrid blanking)

Many enclosure components benefit from both processes on the same part. Example: a 42U server rack side panel may have its perimeter and cable-entry cutouts laser-cut for precision, while the ventilation louvre array and 200+ cage-nut holes are punched for speed. Our nesting software generates a combined program that routes each feature to the optimal machine automatically.

Cost impact for buyers

Laser-only processing for a typical enclosure panel with mixed features costs approximately 20–30% more than hybrid laser + punch processing, primarily because laser is slower on repetitive identical features. We always recommend the most cost-effective process split and flag it during our DFM review stage, before production begins.

Rule of thumb: If your part has >50 identical holes or any formed features (louvres, countersinks), punching will save money. If your part has complex contours, tight-tolerance slots, or material >4 mm, laser is the better choice. For most enclosure components, the optimal answer is both.

Blanking production flow

From raw sheet to inspected blank, step by step.

Material issue & sheet preparation

Raw material verification + sheet loading

Sheet material is issued from stores against a specific production order. Before loading, the operator verifies material grade, thickness, and sheet dimensions against the job card.

Material grade verification against mill test certificate (MTC) — IS 513-D for CRC, IS 2062 for HR, IS 277 for GI, ASTM A240 for SS
Sheet thickness measured with digital micrometer at 3 points (both edges + centre) to confirm within tolerance
Visual inspection for surface defects: dents, scratches, rust spots, or protective film damage
Sheet loaded onto laser or punch bed using vacuum lifter or manual roller table depending on weight

Nesting and NC program loading

Optimized layout → machine-ready code

The pre-programmed nesting layout is loaded from our CAM system. For first-time jobs, the nesting engineer finalises the layout, assigns features to laser or punch, and generates the NC program. For recurring jobs, the saved and versioned program is recalled.

Flat pattern DXFs imported from design team — no manual geometry re-creation
Auto-nesting arranges parts for maximum sheet utilization (85–92% target)
Feature routing: contours → laser, holes/forms → punch (or all to laser for laser-only jobs)
NC code transferred to machine controller via network — no USB or manual input

Fiber laser cutting

Contours, slots, cutouts, thick material

The fiber laser executes all assigned contour cuts, slots, cutouts, and features where thermal precision and edge quality matter. Assist gas is selected per material and buyer specification.

Cutting speeds: up to 40 m/min on 1 mm MS, 15 m/min on 3 mm MS, 6 m/min on 6 mm MS (indicative)
Kerf width: 0.1–0.3 mm depending on material and thickness — accounted for in nesting
Operator monitors cut quality on first part: checks for burr, dross, edge discoloration, and dimensional accuracy
Protective film left on sheet during cutting where specified (e.g., brushed stainless steel for visible enclosure surfaces)

CNC punching & on-turret forming

Holes, louvres, embossing, countersinks

If the part requires punched features, the laser-cut blank (or raw sheet for punch-only jobs) is loaded onto the CNC punch press. The turret indexes to the required tools automatically per the NC program.

Standard round, square, rectangular, and oblong holes: hit rates up to 300 hits/minute on thin material
Louvre punching for ventilation panels: single-hit louvre tools produce formed vents in one stroke
Countersink and dimple forming: flush-mount hardware preparation without secondary pressing
Nibbling for non-standard perimeters using overlapping hits from standard tools
Formed tabs, lances, and card-guide slots for assembly features

Deburring & edge preparation

Clean edges for safe handling and downstream quality

After blanking, parts are deburred as required. Nitrogen-assist laser cuts on stainless steel and aluminium typically require no deburring. Oxygen-assist cuts on thick mild steel and all punched edges are deburred manually or by machine.

Manual deburring for small batches and complex geometry
Vibratory deburring for high-volume small parts (brackets, clips, washers)
Edge radius specification: standard R0.2 mm deburr for safe handling; tighter radii on request
Blanks inspected for burr height (max 0.1 mm for parts proceeding to powder coating) before release to next process

In-process inspection & release

Dimensional verification before forming

Every batch is dimensionally inspected before release to the next operation (typically CNC bending/forming). Catching a dimensional error at the blank stage costs a fraction of discovering it after bending, welding, or coating.

First-piece inspection: all critical dimensions measured against drawing using digital calipers, height gauges, and go/no-go templates
In-process sampling: 1-in-10 check for production runs, 100% inspection for first articles and critical dimensions
Hole position accuracy verified against DXF coordinates using measurement overlays
Parts tagged with job number, material grade, and revision before release to forming queue

Downstream handoff: Inspected blanks proceed to CNC Folding & Forming, then to Fabrication & Welding, and through Powder Coating and Integration & Assembly — all under one roof at our Noida facility.

Materials we cut

Grades, thicknesses, and assist gas selection.

Ferrous metals

Mild Steel (CRC/CRCA): IS 513-D, 0.5–16 mm. Our most commonly cut material for indoor enclosures, server rack panels, brackets, and structural frames. Laser cut with O₂ above 3 mm for speed, N₂ below 3 mm for clean edges.

Hot Rolled Steel (HRC): IS 2062 Gr. E250, 2.0–16 mm. Cut for heavy-duty base plates, gussets, and load-bearing structural components. O₂ assist standard.

Galvanized Steel (GI/GP): IS 277, 0.6–3.0 mm. Standard for outdoor telecom cabinets and battery enclosures. N₂ assist recommended to prevent zinc oxide buildup on cut edge, preserving corrosion protection.

Stainless Steel: SS 304 (ASTM A240 / IS 6911) and SS 316, 0.5–8.0 mm. N₂ assist mandatory for bright, oxide-free edges. Used for IP-rated outdoor enclosures, food-grade applications, marine environments, and brushed-finish visible panels.

Non-ferrous metals

Aluminium: 5052-H32 and 6061-T6, 0.8–6.0 mm. N₂ assist mandatory. Used for lightweight enclosures, heatsinks, RF shielding, and applications where weight reduction matters.

Brass: CuZn37 (C27200), 0.5–4.0 mm. Cut for decorative panels, electrical busbars, and terminal strips. N₂ assist for clean edges.

Copper: C11000 (ETP), 0.5–3.0 mm. Cut for electrical busbars, grounding straps, and heat-dissipation components. Requires reduced cutting speed due to high thermal conductivity and reflectivity.

Standard sheet stock sizes

1,250 × 2,500 mm (most common for CRC, GI, SS)
1,500 × 3,000 mm (for large enclosure panels and reduced waste on long parts)
1,000 × 2,000 mm and 1,220 × 2,440 mm (available on request from stockholders)

Material sourcing: Sheet metal sourced from JSW Steel, Tata Steel, SAIL, Jindal Stainless, and POSCO-certified distributors. Mill test certificates (MTCs) provided on request for traceable programs. We maintain buffer stock of commonly used grades (CRC 0.8/1.0/1.2/1.5/2.0 mm, GI 1.0/1.2/1.6 mm, SS 304 1.0/1.5/2.0 mm) to reduce lead times on urgent orders.

Quality control in blanking

Inspection, maintenance, and traceability.

Operator-level quality checks

Every operator is trained to inspect sheets and blanks with a “fine-tooth comb” approach. Before cutting begins, the operator verifies material grade, thickness, and surface condition. During cutting, the first piece is dimensionally checked against the drawing. Throughout the batch, sampling inspections catch drift before it becomes scrap. After cutting, every part is visually inspected for burr, dross, and edge quality before release.

Machine maintenance discipline

Both laser and punch undergo preventive maintenance on a fixed monthly schedule covering optics cleaning/alignment (laser), tool sharpening/replacement (punch), axis calibration, and consumables replacement. Daily pre-shift checks include lens condition, nozzle centering, assist gas pressure, and axis homing accuracy. This discipline ensures consistent output quality and minimizes unplanned downtime that disrupts delivery schedules.

Measuring instruments

Digital vernier calipers (±0.01 mm), digital micrometers, height gauges, bore gauges, radius gauges, go/no-go pin gauges, and steel rules. Instruments calibrated annually per ISO 17025 traceable standards. For critical first articles, measurements can be recorded on a formal FAI report with dimensional data per drawing callout.

Traceability

Every blanked batch is tagged with: production order number, material grade + thickness + supplier, machine used (laser or punch), operator ID, date, and drawing revision. This tag follows the parts through all downstream operations (bending, welding, coating, assembly) so any quality issue can be traced back to the specific sheet and cutting batch.

Quality commitment: Blanking is the foundation of every part we produce. A dimensional error at this stage cascades through forming, welding, and assembly. That is why we invest in first-piece verification on every job, in-process sampling on every batch, and monthly machine calibration — to ensure that the blank that leaves our cutting cell is production-ready for all downstream operations.

Frequently asked questions

Blanking, laser cutting, and CNC punching queries.

What is the difference between fiber laser cutting and CNC punching?+

Fiber laser cutting uses a focused laser beam to thermally cut material along any 2D profile with high precision (±0.05 mm) and smooth edges. It excels at contour shapes, fine features, and thick materials. CNC punching uses shaped tools that physically shear material, and excels at repetitive identical features (holes, louvres, embossing) at very high speed. Punching can also form features (countersinks, dimples, tabs) that laser cannot. At Eterna, we use both machines in tandem to assign each feature to the optimal process for cost and quality.

What is the maximum sheet metal thickness Eterna can laser cut?+

Our 3 kW fiber laser cuts mild steel up to 16 mm, stainless steel up to 8 mm, aluminium up to 6 mm, and brass/copper up to 4 mm. For thicknesses above 6 mm in mild steel, we use oxygen assist gas for faster cutting. For stainless steel and aluminium at all thicknesses, we use nitrogen assist for oxide-free, burr-free edges.

What cutting accuracy does Eterna achieve on laser-cut parts?+

Our fiber laser achieves positional accuracy of ±0.03 mm and cutting repeatability of ±0.05 mm across the full 3,015 × 1,515 mm bed. For most sheet metal enclosure and component applications, this exceeds the required tolerance. Standard design tolerance for blanked parts is ±0.1 mm per ISO 2768-m.

What materials can Eterna cut with fiber laser?+

We cut mild steel (CRC, HRC), galvanized steel (GI/GP), stainless steel (SS 304, SS 316), aluminium (5052-H32, 6061-T6), brass (CuZn37), and copper (C11000). Materials sourced from JSW, Tata Steel, SAIL, Jindal Stainless, and POSCO-certified distributors. Mill test certificates available on request.

What is nesting and why does it reduce costs?+

Nesting is the process of arranging flat-pattern part geometries on a standard sheet to maximize material utilization and minimize scrap. Our software-driven auto-nesting achieves 85–92% sheet utilization compared to an industry average of 70–78% with manual nesting. For buyers, this means less material wasted per part, which directly reduces per-piece cost — especially impactful on stainless steel and aluminium where material cost is a significant portion of the total part price.

Can Eterna punch louvres and formed features on the turret?+

Yes. Our CNC punch press carries 200+ tool stations including dedicated louvre, countersink, embossing, dimple, and lance-and-form tools. These on-turret forming operations produce shaped features in a single hit, eliminating the need for a separate press brake or stamping operation — saving setup time, tooling cost, and handling between machines. This is particularly valuable for ventilation panels, server rack doors, and perforated enclosure components.

What is the advantage of nitrogen-assist laser cutting?+

Nitrogen-assist cutting produces oxide-free, bright, smooth edges on stainless steel and aluminium — eliminating the need for secondary deburring or grinding. The cut edge is clean enough for direct powder coating or for visible-surface applications where the edge will be seen by the end user. This is essential for IP-rated enclosures where edge quality affects gasket sealing, and for brushed stainless steel enclosures where aesthetic quality matters.

What file formats does Eterna need for laser cutting / blanking?+

For blanking, we ideally need flat-pattern DXF files with all features, holes, and contours on a single layer. We also accept STEP, IGES, DWG, native SolidWorks files, and PDF drawings. If you provide 3D models, our design team will generate the flat patterns and nesting internally as part of our design-to-production workflow. There is no additional charge for flat pattern extraction from 3D STEP files for production orders.

Does Eterna offer laser cutting as a standalone service?+

Yes. While most of our work is integrated manufacturing (blanking + forming + welding + coating + assembly), we do offer standalone laser cutting and CNC punching as a job-shop service. You supply the DXF files and material specification, and we deliver cut blanks. Minimum order value applies. Contact info@itiseterna.com with your DXF files and quantity for pricing.