Precision Custom Glass Cutting
The foundation of perfect glass fabrication. We combine intelligent raw material blanking with advanced CNC and Laser cutting to deliver precise shapes, exact tolerances, and chip-free edges.
- CNC Cutting Precision: ±0.05mm
- Laser Cutting Precision: ±0.001mm
- Prototypes & Small-Batch Production
What Is Custom Glass Cutting?
In custom cover glass manufacturing, the initial step is raw glass material sizing (blanking). Fundamentally, mechanical glass "cutting" does not mean sawing through the material. Instead, it relies on creating a continuous, uniform micro-crack (a score line) on the surface using a high-hardness cutting wheel, followed by applying mechanical force to precisely snap the glass along that predefined path.
Two critical phases
The Core Principle: Stress Concentration & Controlled Fracture
Precision Scoring
A diamond or tungsten carbide cutter wheel rolls across the glass under specific pressure and angles to generate a compressive stress crack. The depth of this crack is typically 1/10 to 1/3 of the total glass thickness. The quality of this score dictates the success of the entire cut. We meticulously control three variables:
Wheel Pressure
If the applied cutting pressure is too light, the crack lacks sufficient depth, and the glass will not break cleanly. If applied too heavily, it generates excessive glass dust and lateral micro-cracks, leading to severe edge chipping or spontaneous shattering.
Wheel Angle
The cutting wheel's angle (typically 110°–135°) is carefully selected to generate optimal tensile stress. For thin consumer electronics glass, we use 120°–125° wheels. As glass thickness increases, wheels with larger angles are deployed.
Cutting Depth Control
For standard flat-panel display glass (e.g., 0.4mm or 0.55mm raw material), we strictly control the scoring depth to 0.06 ± 0.015mm. This depth is dynamically adjusted based on material hardness and breaking difficulty to ensure flawless edge cosmetics.
Controlled Breaking
Once the score line is established, a calculated bending moment (force) is applied to "open" the glass. Because the structural strength at the score line is intentionally weakened, mechanical stress concentrates exclusively at this point. The crack propagates precisely along the scored path, resulting in a clean, highly accurate separation of the glass blank.
Comprehensive Glass Cutting Technologies
Our Glass Cutting Technologies & Capabilities
From high-volume sizing of jumbo sheets to ultra-precise micro-contours, our advanced glass cutting capabilities bring your designs to life. We carefully select the optimal cutting method, Diamond Flat Cutting, Waterjet, or Laser, based on your glass material, thickness, shape, and coating requirements.
Diamond Wheel Flat Cutting
Mainstream Cutting (Semi-auto & Auto CNC)
The most efficient and versatile method for processing large jumbo sheets and thick glass substrates in high-volume mass production.
- Maximum Size: 3660*2440mm (Jumbo)
- Thickness Range: 0.4mm – 19mm+
- Tolerance: ±0.05mm
Precision Laser Cutting
Advanced Non-contact Cutting
The ultimate solution for complex shapes and ultra-high precision, utilizing dedicated laser systems for both profiling and drilling.
- Maximum Size: 600mm*500mmmm
- Thickness Range: 0.1mm – 10mm
- Tolerance: Up to ±0.001mm
Waterjet Glass Cutting
Cold & Flexiable Cutting
A precision cold-cutting process using ultra-high-pressure water and abrasives, ideal for thick glass without causing thermal distortion.
- Maximum Size: 1780*1500mm
- Thickness Range: 3mm – 50mm+
- Tolerance: ±0.5mm to ±1.0mm
Engineering Note: All cutting methods generate offcut waste, which should be considered in pricing based on the actual dimensions and cutting layout. A 1–2 mm allowance is usually reserved during cutting for material removal during subsequent CNC edge grinding.
Custom Glass Cutting Services
| Specification Category | Parameter / Capability | Details & Notes |
|---|---|---|
| Raw Materials Processed | Aluminosilicate, Soda-Lime, Borosilicate, Quartz, Optical Glass | Includes Gorilla® Glass, Dragontrail™, Schott, AGC, etc. Note: Laser cutting requires light transmittance. |
| Glass Thickness Range | Overall: 0.1 mm – 50 mm+ Laser: 0.1 mm – 15 mm CNC Flat: 0.4 mm – 19 mm+ Waterjet: 3 mm – 50 mm+ | Laser can cut up to 8–15 mm clear glass via multi-pass. Waterjet is ideal for ultra-thick blocks. |
| Dimensional Tolerance | Laser: Up to ±0.001 mm CNC Flat: ±0.1 mm to ±0.2 mm Waterjet: ±0.5 mm to ±1.0 mm | Highly dependent on glass thickness, shape complexity, and material type. |
| Maximum Processing Size | CNC Flat: 2440 mm × 3660 mm Waterjet: 2000 mm × 3000 mm Laser: 600 mm × 600 mm | CNC Flat handles standard Jumbo mother sheets for high-volume blanking. |
| Minimum Processing Size | Down to 5 mm × 5 mm | Micro-cutting <5 mm is available via specialized laser processing upon request. |
| Minimum Hole Diameter | Laser: Down to 0.1 mm CNC / Waterjet: ≥ Glass Thickness | For CNC, hole diameter usually must be greater than or equal to the glass thickness to prevent breakage. |
| Edge Chipping Control | Laser: < 0.01 mm, virtually zero CNC Flat: < 0.1 mm | All CNC cut edges will have a 1–2 mm allowance reserved for subsequent CNC edge grinding and polishing. |
| Accepted CAD Formats | 2D: DXF, DWG, PDF 3D: STEP, IGES | Please specify critical tolerances and optical zones in your drawings. |
Choosing the Right Cutting Method
Every custom glass project has unique requirements. Below is a breakdown of the advantages and limitations of our cutting technologies to help you understand how we engineer your fabrication process.
CNC Diamond Flat Cutting
The standard for high-volume blanking and straightforward geometries.
Precision Laser Cutting
The ultimate solution for micro-precision, ultra-thin glass, and complex contours and drilling.
Waterjet Glass Cutting
A specialized cold-cutting process for ultra-thick glass blocks and rough sizing.
Critical Process Parameters & Quality Control for Glass Cutting
Five Key Control Points
Precision glass cutting is not a matter of simply running a blade across a surface. Achieving a clean, chip-free edge requires the meticulous calibration of machine variables to match the specific properties of the glass substrate. Our engineering team continuously monitors and adjusts the following critical parameters to ensure optimal cutting quality.
Request ReviewFactory SOP
CNC Cutting Parameters for Thin Glass
Different glass brands and thicknesses require unique machining setups. To demonstrate our precise process control, the table below provides a sample reference excerpt from our internal Standard Operating Procedures (SOP) for ultra-thin glass.
Standard Cutter Wheel Specification: 3.0 × 0.8 × 0.65 × 120° (Pneumatic Air Pressure constant at 50%)
Standard Cutter Wheel Specification: 3.0 × 0.8 × 0.65 × 120° (Pneumatic Air Pressure constant at 50%)
Materials
Thickness
Plunge Pressure
Standard Cutting Pressure
High-Speed CNC Feed Rate (Small)
Large Machine Feed Rate(Large)
AGC
0.55mm
720 - 900
850 - 1100
8000 - 9000 mm/min
4000 - 5000 mm/min
AGC
0.7mm
740 - 950
950 - 1100
8000 - 9000 mm/min
4000 - 5000 mm/min
AGC
0.95 - 1.1mm
800 - 900
900 - 1000
8000 - 9000 mm/min
4000 - 5000 mm/min
Corning
0.55mm
800 - 850
900 - 1000
8000 - 9000 mm/min
4000 - 5000 mm/min
Corning
0.7mm
740 - 950
950 - 1100
8000 - 9000 mm/min
4000 - 5000 mm/min
Corning
0.8mm
750 - 900
1030 - 1120
8000 - 9000 mm/min
4000 - 5000 mm/min
Note: The data above serves as an illustrative reference only. Actual production settings are dynamically optimized based on specific material batches and product requirements. Furthermore, the pressure values listed refer to the internal proportional valve settings of our CNC cutting systems, rather than absolute international pressure units.
TECHNICAL FAQs
Custom Glass Cutting Questions Asked
Does every cut glass edge require grinding?
Yes, absolutely. Whether the glass is cut via CNC diamond scoring, waterjet, or even ultra-precise laser cutting, the raw cut edge will still possess microscopic flaws, sharp corners, or structural vulnerabilities. Edge grinding is a mandatory process to eliminate Sub-Surface Damage (SSD), ensure precise dimensional tolerances, and guarantee that the glass will survive the extreme stress of the subsequent tempering process without shattering.
Which edge profile is best for display cover glass?
A Flat Edge with Arris (C-Chamfer) is the industry standard. It prevents edge chipping during assembly and is cost-effective. For frameless touchscreens, a Pencil (Round) edge is preferred for ergonomics.
Can you process complex, custom-shaped external contours?
Absolutely. Our multi-axis CNC machining centers can profile circular, oval, asymmetrical, and highly complex freeform geometries based on your drawing files.
What is your MOQ and sample lead time?
We support everything from 1-off prototypes to mass production. Sample lead times are project dependent, typically ranging from 7 to 15 days depending on material availability and complexity.
Can you grind the edge of glass after it has been tempered?
No. Tempering process locks immense stress inside the glass. Grinding or cutting tempered glass will cause it to shatter instantly. All edging must be completed before tempering.
What is the difference between grinding and polishing?
Grinding uses diamond wheels to shape the glass, control dimensions, and remove dangerous micro-cracks (matte finish). Polishing uses resin/cerium oxide to make that ground edge transparent and smooth.
How should I call out chamfers on my drawing?
Please specify both the angle and the width (or depth). For example: “45° × 0.5mm chamfer all around.”
What drawing file formats do you accept?
We prefer 2D CAD files (.DXF, .DWG, .PDF) for standard perimeters, and 3D files (.STEP, .IGES) for complex stepped or 2.5D/3D curved edges.
End-to-End Glass Fabrication Process & Capabilities We Offer
As a full-service custom glass manufacturer, we provide end-to-end in-house glass fabrication support, from cutting and CNC shaping to strengthening, printing, coating, bonding, inspection, and final packaging, delivering ready-to-assemble glass components tailored to your project requirements.
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Complete OEM/ODM Glass Solutions
From raw glass to finished components, our custom fabrication ensures tight tolerances for both rapid prototyping and high-volume production. Contact us today. Our team will review your project and respond within 24 hours.