Insulators
Ceramic multi-bore tubes, fish spine beads, ignition tubes and electrical feed-throughs that protect conductors and maintain insulating performance under extreme conditions.
Tags: Electrical Insulator Tubes Fish Spine Beads Ignition Tubes Lead-Through Tubes Custom Insulator Components
About this product
We supply a wide range of ceramic insulators — including multi-bore tubes, fish spine beads, ignition tubes and electrical feed-through components — designed to protect conductors, manage high-voltage separation and maintain insulating performance under extreme temperatures and aggressive environments. Products are available in single, twin, 4, 6 and custom multi-bore configurations, in standard stock sizes or complex custom shapes. Ignition tubes are supplied straight or shaped, glazed or unglazed, and as components or pre-assembled units. Lead-through tubes are available flanged for furnace wall passages for burners, cables and thermocouples.
What that means for you
Exceptional electrical insulation
High dielectric strength materials maintain integrity and safety under high voltage.
High temperature capability
Stable performance in furnaces, ignition systems and thermal processing environments.
Chemical & corrosion resistance
Ceramics resist oxidation, corrosive atmospheres and harsh industrial conditions.
High dimensional precision
Tight tolerances support consistent performance and reliable interface fit.
Multi-bore options
Available in single, twin, 4, 6 and custom multi-bore configurations.
Custom shapes & geometries
Parts available in different stock sizes or in complex custom shapes.
Reliable insulation performance, greater system stability, fewer failures and longer service life — even under high thermal, mechanical or electrical stress.
Specs at a glance
| Property | Range | Notes |
|---|---|---|
| Bore configurations | Single, twin, 4, 6, custom multi-bore | Custom available |
| Finish options | Glazed or unglazed | Per application |
| MaterialsBore configurations | Alumina, zirconia, steatite, boron nitride | 4+ gradesCustom available |
| Finish options | Per application | |
| Materials | 4+ grades |
Individual products in this range
Material options
Our insulators are produced in a range of high-performance dielectric ceramic materials, selected to suit your voltage, temperature and chemical conditions:
– High-Purity Alumina — high dielectric strength, high-temperature performance
– Zirconia — high fracture toughness and thermal shock resistance
– Steatite — excellent insulation for general industrial electrical applications
– Boron Nitride — exceptional electrical insulation in extreme high-temperature environments
– Other specialised ceramic formulations available on request
Where these products work
Other ceramic components
Your questions answered
What types of ceramic insulators do you supply?
The range covers electrical insulator tubes (single, twin, multi-bore), fish spine beads, ignition tubes, lead-through tubes for furnace passages, and custom insulator components.
Which material has the best dielectric properties?
High-purity alumina offers high dielectric strength with strong high-temperature performance. Boron nitride provides exceptional electrical insulation in extreme high-temperature service. Steatite is well-suited to general industrial electrical applications.
Can you supply glazed ignition tubes?
Yes. Ignition tubes are supplied straight or shaped, glazed or unglazed, and as components or pre-assembled units to suit your ignition system.
What multi-bore configurations are available?
Single, twin, 4, 6 and custom multi-bore configurations are available — supporting various conductor separation and high-voltage isolation requirements.
Can you supply lead-through tubes for vacuum furnaces?
Yes. Flanged ceramic lead-through tubes are available for furnace wall passages, supporting burners, cables and thermocouples in vacuum and atmospheric furnace systems.
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Datasheet, drawing or quote — pick your next step
Send us your insulator drawing or wiring specification — our team will help you specify the right material, configuration and dimensions for your application.