Call Us



SB Glass Capillaries

SB Glass Capillaries are essential components for optical communication, crafted from borosilicate glass. They feature a unique square hole design with an inner diameter precision of ±0.001mm, ensuring high accuracy in fiber positioning. These capillaries boast excellent physical and chemical durability, along with high ultraviolet (UV) transmission, making them suitable for housing and precisely positioning up to 4 optical fibers. The use of UV adhesive allows for quick curing and bonding, securing the fibers in place. Additionally, their polishing characteristics are akin to those of optical fibers, facilitating the easy achievement of the required optical polishing surface for fiber connections. SB Glass Capillaries are versatile, finding applications in various optical devices, including connectors, joints, and couplers, offering a reliable solution for sophisticated optical communication setups.

sb glass capillaries

Specifications of SB Glass Capillaries

SB Glass Capillaries Specification Sheet
Material PropertiesMaterial: Borosilicate Glass
Density: 2.3×10³Kg/m³   CTE: 3.3×10-6cm/cm℃
Compressive Strength: >1.57×108Pa Young modulus 6.76×1010Pa/m2
Softening Point: 820℃   Annealing Point: 560℃   Deformation Point: 520℃
Refractive Index: 1.47
Dielectric Constant: 4.9(@1MHz)
Dimensions and Tolerances

OD: Φ1.00mm, Φ1.80mm, Φ2.00mm, Φ2.50m

Tolerance: OD±0.005mm, or according to customer requirements.

ID: W×W: 0.102×0.102, 0.162×0.162, 0.254×0.254mm, 0.379×0.379, 0.504×0.504------                      
Tolerance: W±0.002mm. or according to customer requirements.
Length: 5mm, 7mm, 15mm, 20mm                                  
Tolerance: L±0.2mm, or according to customer requirements.
Cone Diameter:Φ0.5±0.15mm, Φ1±0.25mm, or according to customer requirements.
Cone Depth: 0.5~1.5mm, 1~2.5mm, or according to customer requirements.
Coaxiality: 0.008mm
Surface QualityThe cylindrical surface of the product is transparent. The product has no cracks, appearance and surface condition can be made according to customer requirements.
Can be customized according to customer requirements.

Dimension Drawing of SB Glass Capillaries

Dimension Drawing of SB Glass Capillaries

Features of SB Glass Capillaries

Features of SB Glass Capillaries
  • Material: Borosilicate Glass, silica (SiO2) content 80%, softening point >800°C, high strength, high hardness, high light transmittance.

  • Properties: The glass capillary is melted and drawn at high temperature. The surface is transparent, which eliminates hidden micro-cracks on the surface. It is not easy to crack and break when dispensing glue to fix the optical fiber, and the dispensing qualification rate is high.

  • The glass capillary is transparent and has high UV transmission characteristics. The capillary tube and 2/3/4 optical fibers can be quickly cured and bonded with UV adhesive to fix and position the optical fibers.

  • Environmental performance: The production process does not use any chemical solvents, and the materials and production process do not contain or involve substances controlled by the European Union.

  • High dimensional accuracy: The double microhole glass capillary is accurately made through a CNC drawing tower. The optical fiber has high dimensional tolerance and positioning accuracy. The double capillary holes can install two optical fibers for precise positioning, and can precisely control the center distance between the two optical fibers.

optical lenses wholesale
Get in Touch
For better future and business, let’s get started now.
Contact Info
Whether you have a question about product features, shipping, site policies or anything else, we're here to help ad ready to answer your questions.
Bldg. A Baolong Industrial Zone #491 Dalang South Rd. Longhua District Shenzhen China
Request a Free quote