What packaging do you use to ensure ceramics are safe?

We pack the ceramic products tidily with foam protection inside the carton, plastic box, and wooden box.

Do you accept custom orders?

Of course, most of our orders are custom products.

Would you provide an inspection report and material test certificate for our order?

Yes, we can provide these documents upon request.

Low Thermal Expansion Stepped Circular Bushing Alumina Ceramic Sleeve

Name: Low Thermal Expansion Stepped Circular Bushing Alumina Ceramic Sleeve
Brand: Xiamen Wintrustek Advanced Materials Co., Ltd.
SKU: 1993308981

Fujian, ChinaXiamen Wintrustek Advanced Materials Co., Ltd.

US$1.00-100.00

1 Piece

Product profile

Customization

Available

Application

Aerospace, Electronics, Medical, Refractory, Industrial

Purity

99%

Model NO.

WTK-Al2O3

Type

Ceramic Ring

Material

Alumina

Density

3.6g/cm3

Color

White

Flexural Strength

300 MPa

Compressive Strength

2300 MPa

Thermal Conductivity

20 W/M.K

Dielectric Strength

>15 Kv/mm

Transport Package

Carton, Wooden Box, Pallet

Specification

Customized

Trademark

WINTRUSTEK

Origin

Fujian, China

HS Code

8547100000

Production Capacity

5000 Pieces/Month

Key features

Provides high dielectric strength and volume resistivity, ensuring reliable high-voltage insulation in harsh electrical environments.

Made of 99%--99.7% high-purity alumina, offering superior hardness and chemical inertness against abrasive wear and acids.

Advanced diamond grinding ensures strict concentricity, precise stepped dimensions, and tight tolerances for seamless equipment assembly.

Company profile

Cooperated with Fortune 500Management CertificationQuality AssuranceRaw Materials Reports

Xiamen Wintrustek Advanced Materials Co., Ltd.

Fujian, China

Business Type: Manufacturer/FactoryExport Year: 2014-04-01Nearest Port: XiamenAverage Response Time: ≤1.79hTerms of Payment: LC, T/T, PayPal, etc.International Commercial Terms(Incoterms): FOB, EXW, CFR, CIF, CIP, CPT, FCA

AI-Powered supplier vetting

SummaryThe supplier is identified as a trading company with export activity and reported annual productivity of 220 tons of boron nitride ceramics. It offers extensive customization, ODM, and OEM services, supported by two R&D engineers and documented design-development records. Quality and service procedures are documented, but finished products are checked by packing staff and the supplier reports zero quality-control test equipment. ISO9001:2015 and CE certifications are stated. Financial records are referenced for 2022–2024, but no substantive financial performance details are provided. The supplier has no overseas warehouses, showrooms, agents or branches, and has not participated in offline trade shows. No specific customer names or verifiable customer cases are supplied.

CertificationsThe supplier reports an ISO9001:2015 management-system certificate and CE product compliance certification. These stated certifications support quality-management and product-compliance capability, although certificate scope and validity details are not provided.

After-Sales capabilityTwo technology engineers are responsible for technical support for after-sales service, and the supplier reports documented and followed procedures for customer complaints and corrective/preventive actions. This is explicit evidence of an established after-sales process.

R&D capabilityThe supplier reports new products during the past year, provides ODM services, and has two R&D engineers responsible for new product development. It also has design input, output, review, verification and validation documents available for audit, although no SDK is available.

Production capacityReported productivity is 220 tons of boron nitride ceramics, with a stated lead time of within 15 working days in the off-season and one month during peak season. However, zero quality-control test equipment and finished-product checking by packing staff indicate a documented weakness in production quality-control resources.

Customization capabilityThe supplier explicitly offers customization from samples, designs, full customization, minor customization and flexible customization, alongside ODM capability. These repeated service declarations demonstrate broad customization coverage.

Product Q&A

Q:What is your minimum order quantity (MOQ)?

Our minimum order quantity (MOQ) depends on many factors such as product, material, dimensions, etc.

Q:Do you provide free samples?

Yes, we are pleased to provide a free sample for your initial evaluation of our materials if we have the sample in stock and if its cost is bearable to us.

Q:Do you accept a trial order before a bulk purchase?

Yes, we welcome your trial order to verify our quality before your bulk purchase.

Q:What is your production time?

Our production time depends on materials, production methods, tolerances, quantity, etc. Normally, it takes 15-20 days if we have stock material, and it takes 30-40 days if we don't. Please share your specific requirements with us, and we will quote the fastest production time.

Q:What are your payment terms?

Our payment terms are T/T, L/C, and PayPal.