Place of Origin:Guangdong, China
Product Material:
95%–99.8% alumina ceramic (Al₂O₃). Material grade is selected according to application requirements.
Functional Properties:
High hardness, wear resistance, electrical insulation and high-temperature resistance. Temperature limits and chemical compatibility depend on the material grade and operating conditions. Custom dimensions and surface finishes are available through our precision ceramic machining capabilities.
Application Industries:
Electrical and electronics, industrial machinery, furnace equipment, pump and fluid control systems, laboratory equipment, and laser systems. Typical uses include insulation pins, ceramic standoffs and supports, furnace components, pump plungers and pistons, laboratory stirring rods, laser gain medium supports, and precision wear-resistant pins.
Global OEM Supply:
Serving OEM customers in the USA, Germany, Japan, and Europe.
Delivery Time:
Standard rod sizes: 7–15 days.
Custom high-precision or extra-long rods: 25–40 days.
Final lead time is confirmed according to drawing requirements and order quantity.
Alumina ceramic rods are solid aluminum oxide (Al₂O₃) components used for electrical insulation, equipment support and wear-resistant contact points. They serve electrical assemblies, industrial machinery, furnaces and laboratory equipment where conductive metal or softer materials may be unsuitable. These rods help isolate conductive parts and limit contact wear, with material grades and machined surfaces selected to suit the operating conditions and assembly requirements.
These rods are manufactured from alumina ceramic (Al₂O₃), with alumina content ranging from 95% to 99.8%. The appropriate grade is selected according to working temperature, electrical requirements, contact media and mechanical loading.
Higher alumina content does not automatically make a grade the best choice for every application. For replacement rods, the original material specification provides a useful starting point. The proposed material should also be reviewed against the part geometry and operating conditions.
| Parameter | Typical Value / Specification |
|---|---|
| Material | Alumina ceramic (Al₂O₃) |
| Alumina Content | 95%–99.8% |
| Vickers Hardness | 15–18 GPa |
| Flexural Strength | 300–400 MPa |
| Maximum Operating Temperature | 1500–1650°C |
| Dielectric Strength | 15–20 kV/mm |
| Coefficient of Thermal Expansion | 8.0 × 10⁻⁶ K⁻¹ |
| Surface Roughness | Ra ≤ 0.4 µm on precision-ground surfaces |
Values shown are typical reference values and vary by alumina grade and test conditions. Final specifications are confirmed during quotation.
Start with the reason the existing rod needs replacing. Electrical conduction, worn contact surfaces, impact damage and temperature exposure call for different selection priorities.
| Material | Selection Focus | Points to Review |
|---|---|---|
| Alumina Ceramic | Electrical isolation with a hard contact surface. | Mounting stress, brittle-fracture risk and grade suitability. |
| Metal | Ductility, threaded connections and tolerance of impact. | Whether conduction, corrosion and contact wear are acceptable. |
| Engineering Polymer | Lightweight insulation under less demanding thermal conditions. | Grade-specific temperature limits, creep and chemical compatibility. |
| Other Technical Ceramics | A specific requirement beyond the selected alumina grade. | Compare toughness, thermal behavior, electrical properties and machining cost using grade-specific data. |
Please provide a dimensioned drawing, order quantity and a brief description of the operating environment. Mark the mating surfaces and any required inspection documents. If you are replacing a worn part, photographs of the contact area can also help explain the problem.
Avoid forcing the rod into a misaligned opening or concentrating clamping pressure on an edge. The mounting arrangement should allow for suitable clearance and the behavior of adjacent materials during temperature changes.
Finished alumina is difficult to modify with ordinary workshop tools. Include holes, final lengths and end features in the initial drawing so machining feasibility can be reviewed before production.
Matching the diameter is only part of the review. Seals, alignment, attachment details, fluid compatibility and the load cycle also affect suitability. Provide the existing assembly details before approving a material change.
Consider the unsupported span, support positions, installation direction and expected bending load. A long rod should be evaluated in its actual mounting arrangement, especially where movement or uneven loading may occur.
Yes. CERAMPRO supplies alumina ceramic rods from Guangdong, China, serving OEM customers in the USA, Germany, Japan and across Europe. Please send your drawings, order quantity and delivery location so we can provide a quotation with the production lead time and shipping options.
Test the samples in the intended assembly and operating cycle. Record fit, movement, contact wear and visible damage, then compare the results with your acceptance criteria. Approve the drawing and material grade before proceeding with batch production.
