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Custom Alumina Ceramic Conical Sleeve | Tapered Al2O3 Ceramic Bushing & Cone Parts

A taper is the simplest self-centering joint there is, and alumina is the material that survives the environment around it. These conical sleeves are ground on the taper surface so the included angle and roundness are accurate along the whole length - the sleeve locates, centers and insulates by wedging, without shims.

Wall thickness, small-end and large-end diameters and taper angle are all specified per drawing. Typical diameter range is 5 to 200 mm with wall thickness from 1 to 20 mm. Thin-wall tapered sleeves and solid cones for locating pins are both produced in our plant from sintered blanks, so geometry is not limited by a pressing mould.

Key properties: ground taper surface with accurate angle and roundness over the full length; self-centering wedge action that locates parts without shims; thin-wall capability; 95%-99% Al2O3 with service temperature 1400-1650C; wear and corrosion resistance that outlasts metal sleeves in abrasive or corrosive media; roundness within 0.01 mm and taper angle within +/-0.5 degree.

Typical applications: locating and centering sleeves in hot equipment, insulating tapers for electrode and sensor mounts, wear bushes in abrasive powder handling, high temperature sealing tapers, semiconductor and PV process fixtures.

Custom manufacturing: send the taper angle, end diameters and wall thickness. 1-5 piece prototypes are routine, so you can validate the fit before batch production. Prototypes from 1 piece, 7-15 days. ISO 9001 certified, RoHS 2.0 compliant.

 
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Home / Products / Aluminum Oxide (Al2O3) / Custom Alumina Ceramic Conical Sleeve & Tapered Bushing

Custom Alumina Ceramic Conical Sleeve & Tapered Bushing

Custom non-standard alumina (Al2O3) ceramic part · CNC precision machining · OEM / ODM · Hero Ceramic by Haorui Industrial

Product Overview

A taper is the simplest self-centering joint there is, and alumina is the material that survives the environment around it. These conical sleeves are ground on the taper surface so the included angle and roundness are accurate along the whole length — the sleeve locates, insulates and centers by wedging, without shims.

Wall thickness, small-end and large-end diameters and taper angle are all specified per drawing. Thin-wall tapered sleeves and solid cones for locating pins are both produced in our plant.

Key Features

Ground taper surfaceAccurate angle and roundness along full length.
Self-centering functionWedge action locates parts without shims.
Thin-wall capableMachined from sintered blanks, no mould limits.
High temperature insulation95–99% Al2O3, service to 1400–1650°C.
Wear & corrosion resistantOutlasts metal sleeves in abrasive or corrosive media.

Technical Specifications

Material 95% / 99% Al2O3 alumina ceramic
Density 3.60 – 3.85 g/cm³
Taper angle Custom (ground)
Diameter range Ø5 – Ø200 mm typical
Wall thickness 1 – 20 mm
Roundness ≤0.01 mm
Max. service temperature 1400 – 1650°C

Typical values for reference; custom grades and dimensions per drawing.

Applications

  • Locating and centering sleeves in hot equipment

  • Insulating tapers for electrode and sensor mounts

  • Wear bushes in abrasive powder handling

  • High temperature sealing tapers

  • Semiconductor and PV process fixtures

Custom Machining (OEM / ODM)

Haorui Industrial has machined non-standard advanced ceramics since 2006 (ISO 9001). Send us a 2D drawing (PDF/DWG) or a sample: we quote with tolerance and material recommendation, produce 1–10 piece prototypes in 7–15 days, and keep the process data for repeat batches. Materials available: 95% / 99% / 99.5% Al2O3, ZrO2, Si3N4, SiC, AlN, macor.

FAQ

How accurate can the taper angle be?

Ground tapers are held to within ±0.5° of nominal, with roundness ≤0.01 mm along the length.

Can you make very thin walls?

Yes, down to about 1 mm depending on length and diameter — send the drawing for a feasibility check.

Is a sample possible before batch production?

Yes, we produce 1–5 piece prototypes routinely and keep the process data for batch repeatability.

Certifications & Trade Shows

Quality you can verify: Haorui Industrial operates an ISO 9001:2015 certified quality management system (scope: precision mechanical ceramics parts), and our alumina and zirconia ceramics are RoHS 2.0 compliant — tested per IEC 62321 by an accredited third-party laboratory. We exhibit every year at CIOE (China International Optoelectronic Exposition) and semiconductor industry expositions in Shenzhen — visit our booth to see the parts in person.

Need this part in your size?
Email your drawing to sales for a quotation within 24 hours — prototypes from 1 piece.
Haorui Industrial (Hero Ceramic) · Shenzhen, China · ISO 9001 certified

Alumina Ceramic Series · Haorui Industrial · Advanced Ceramic Custom Machining since 2006


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Founded in June 2006, Shenzhen Haorui IndustriaI Technology Co.,Ltd. is a professional enterprise engaged in R&D, manufacturing and sales of non-standard industrial ceramics, hard alloys (tungsten steel) and various metal and non-metal precision machinery parts.

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