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Borosilicate Glass CNC Machining Services

Borosilicate glass is a specialized glass known for its high thermal shock resistance, chemical durability, and optical transparency. It is widely used in laboratory, industrial, and optical applications. Our CNC machining services enable high-precision fabrication of borosilicate parts, including custom windows, tubes, plates, and fluidic components.

Material Properties & Advantages

What is Borosilicate Glass?

Borosilicate is a silica-based technical glass that incorporates boron trioxide (B₂O₃) to significantly reduce its coefficient of thermal expansion. It exhibits superior resistance to temperature changes, chemical attack, and optical distortion, making it ideal for scientific, high-temperature, and chemically aggressive environments.

Key Advantages of Borosilicate Glass:

Thermal Shock Resistance
– Endures rapid heating and cooling cycles without cracking
Chemical Resistance
– Withstands acids, solvents, and alkalis (except HF)
Good Compressive Strength
– Maintains integrity under load in static assemblies
Optical Clarity
– Transparent across the visible and near-IR spectrum
Low Thermal Expansion
– ~3.3 × 10⁻⁶ /K ensures dimensional stability

Borosilicate Glass Specifications & Datasheets

We offer CNC machining for high-purity sintered Borosilicate Glass.

Borosilicate Glass

Hardness
Density
Thermal Conductivity
Electrical Resistivity

~6.5 (Mohs)

~2.23 g/cm³

~1.2 W/m·K

~10¹⁰ – 10¹⁴ Ω·cm

Wear Resistance
Chemical Resistance
Flexural Strength
Compressive Strength

Moderate

Excellent

~60 MPa

>1,000 MPa

Custom Borosilicate Material Options

Need a specific Borosilicate composition? We offer custom material options tailored to your project requirements. Contact us to discuss your needs.

Trusted by over 200 successful companies around the globe.

Machining Capabilities for Borosilicate

Challenges & Solutions
Although more forgiving than fused silica, borosilicate remains brittle and must be processed with care. Our solutions include:

Diamond Grinding & CNC Milling – For detailed geometries and mounting features
Ultrasonic-Assisted Machining – Minimizes chipping and surface stress
Precision Drilling – Clean holes for vacuum or fluidic connections
Edge Finishing – Improves safety and durability in handling

Tolerances Achievable for Machined Borosilicate

Milling & Turning: ±0.02 mm
Grinding: ±0.005 mm

Applications of Borosilicate

Borosilicate is used where optical clarity, thermal resistance, and chemical inertness are essential—often as a reliable alternative to quartz for mid-performance roles.

Industries Served:

Laboratory & Chemical Equipment – Beakers, flasks, flow cells, sight glasses
Optics & Imaging – Windows, coverslips, IR filters
Semiconductors – Viewports, wafer handling components
Medical & Life Sciences – Fluidic chips, sterilizable instruments
Industrial & Energy – Process observation windows, thermal barriers
Surface Finishing Options for Borosilicate

To meet strict industry standards, we offer advanced surface treatments for Borosilicate parts:

Polishing

For optics, laser transmission, or microscope covers.

Fire-Polished Edges

Smooth surfaces for strength and safety.

Beveling & Chamfering

Prevents flaking in high-stress assembly zones.

Efficiency

Moving Fast, Guaranteed.

We prioritize operational efficiency to reduce costs and expedite delivery.

  • Average response time within 2 hours
  • Global delivery in a matter of days
  • 97.4% of parts shipped on time

Wide-Ranging Experience

Crafting Excellence Through Diverse Expertise

Our collaboration with diverse partners, each with unique machinery and expertise, enables us to overcome complex manufacturing challenges.

  • Over 2000 projects delivered
  • Expertise in multiple manufacturing processes
  • Expert DFM feedback

Massive Capacity

Ready to Meet Your Demands

Backed by 100+ carefully vetted, closely partnered experts, we fulfill your on-demand manufacturing needs at scale.

  • 65+ CNC Manufacturing Partners
  • 15+ Additive Manufacturing Partners
  • 20+ Surface Finishing Partners

Quality Assurance

Ensuring Perfection, Delivering Excellence

Every part we ship is meticulously inspected in our in-house lab to ensure it meets consistent design and quality standards.

  • ISO 9001:2015 Certified
  • State-of-the-art QC Equipment
  • In-depth Inspection Reports Available

Additional Ceramics We Support

In addition to Borosilicate, we offer precision CNC machining services for other hard technical ceramics:

Alumina (Al₂O₃)

Alumina (Al₂O₃) is a durable ceramic used for high-strength, high-temperature parts in precision industries.

Zirconia (ZrO₂)

High fracture toughness and wear resistance.

Boron Nitride (BN)

Excellent thermal conductivity and electrical insulation.

Quartz & Glass Ceramics

Used for optical and semiconductor applications.

Silicon (Si)

Essential for semiconductor wafer processing.

Looking for more ceramic machining options? Check out our Alumina (Al₂O₃) CNC Machining services.

Request a Quote for Borosilicate CNC Machining Today

Looking for high-precision Borosilicate machining? InstaVoxel delivers expert CNC machining, fast lead times, and superior quality. Contact us today to discuss your project.

Borosilicate FAQs

  • Is Borosilicate chemically durable?
    Yes. It resists most acids and bases, with the exception of hydrofluoric acid (HF).
  • Can Borosilicate be polished?
    Yes. It can be optically polished for high-transparency applications such as lenses or microscope windows.
  • Is Borosilicate easy to machine?
    It is more machinable than fused silica or ceramics, but still requires diamond tools and stress management to prevent cracking.
  • What is Borosilicate Glass used for in CNC machining?
    It’s used to make chemically resistant, thermally stable transparent components like windows, tubes, and precision plates.