95% 99% 99.7% Al2O3 Alumina Ceramic Eyelet Guide Al2O3 Wheel

• Customization: Available
• Application: Refractory, Structure Ceramic, Industrial Ceramic
• Grain Size: 1-10um
• Model NO.: HBF
• Type: Ceramic Parts
• Density: 3.90g/cm3
• Color: Ivory
• Name: Diamond Polishing Alumina Textile Ceramic Guide
• Surface: Diamong Polishing
• Size: Accept Customize
• Name2: Ceramic Wire Guide Pulley
• Use: Wire Yarn Guide
• Name 3: Ceramic Yarn Guide
• Transport Package: Export Carton
• Specification: ROHS
• Trademark: OEM
• Origin: China
• HS Code: 8547100000
• Production Capacity: 100000PCS Per Month
• Package Size: 15.00cm * 10.00cm * 15.00cm
• Package Gross Weight: 1.000kg

Product Description

Product Description

Precision ceramic wire guide, ceramic eyelet

Alumina ceramic eyelet,ceramic yarn guide
Alumina ceramic wire guide eyelets are made of 95% / 99%/99.7% high purity Al2O3 powder, isostatic pressing and integrated dense sintering at 1650℃.
Types including single collar, double collars etc .
Perfect replacement for nylon, brass, stainless steel, PU plastic guide rollers, core wear-resistant wire guiding parts for high-speed textile twister, enamel wire winding, optical fiber drawing, carbon fiber and precision harness equipment.

Textile ceramic eyelet

Q1: How do you tell the difference between 95 alumina ceramic eyes and 99 high-purity ceramic eyes, and how should you choose?  
A: 95 alumina gives better cost performance, with hardness and wear resistance suitable for ordinary textile, webbing, and standard enameled wire equipment. 99% alumina has higher purity, with better inner hole polishing, lower friction, and fewer impurities—ideal for ultra-fine enameled wire, optical fiber, medical sutures, and high-end precision textile machines. For general batch equipment, go with 95 ceramics; for high-precision fine wire processing, prioritize 99 ceramics.
 
Wide Application of alumina eyelet:
Textile: twister, texturing machine, circular knitting machine, air jet loom, ribbon loom, fishing net twisting machine yarn guide 
Wire & electronics: enamel wire winding machine, copper aluminum wire drawing machine, optical fiber extrusion, inductor & transformer coil winding equipment 

Alumina ceramic eyelet

Compressive Strength  ≥ 2500 MPa
Fracture Toughness (KIC)  4 – 5.6 MPa·m¹/²
Thermal Conductivity  ~30 W/m·K
Dielectric Strength 15 – 20 kV/mm
Chemical Resistance  Excellent resistance to acids and alkalis
 
Q2: Why specify surface roughness (Ra)?
A Surface finish is critical. An Ra value ≤ 0.2 µm (Ultra-Fine Polish) ensures the bore is free of microscopic peaks that can scratch delicate fibers or wires at high speeds. For standard applications, Ra 0.4–0.8 µm is usually sufficient.

Q3: Are pink ceramic eyelets lower quality?
A No. The pink color comes from trace amounts of chromium oxide (Cr2O3) or titanium oxide added during sintering. These additives improve densification but do not compromise the physical properties compared to white 99% alumina. It is often used for easy visual identification on the production floor.

Technical Specifications

(Custom configurations available upon request.)

AluminaPurity	92%	95%	96%	99%	99.6%
Color	White	White	White	Ivory White	White
Volumedensity	3.45g/cm3	3.5g/cm3	3.7g/cm3	3.75g/cm3	3.9g/cm3
Water Absorption	0	0	0	0	0
Flexural Strength	300Mpa	300Mpa	320Mpa	330Mpa	330Mpa
Vickershardness	1300	1400	1400	1800	1800
DielectricConstant	10(at1MHZ25℃)	10(at1MHZ25℃)	10(at1MHZ25℃)	10(at1MHZ25℃)	10(at1MHZ25℃)
Modulus of elasticity	350Gpa	350Gpa	350Gpa	370Gpa	370Gpa
thermalconductivity(30℃)	18W/M.K	24W/M.K	24W/M.K	25W/M.K	28W/M.K
Volume resistivity	10^14Ω•cm	10^14Ω•cm	10^14Ω•cm	10^14Ω•cm	10^15Ω•cm
Dielectric strength	20KV/mm	20KV/mm	20KV/mm	20KV/mm	30KV/mm

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Q4: Why is your factory price more stable than trading companies? 
A4: As a direct manufacturer, we control all links from raw material procurement, production processing to finished product output. There is no intermediate markup, and we can adjust costs according to long-term cooperative orders, maintaining stable and transparent pricing for long-term strategic partners.
 
Q5: What customized service items can you support besides product structure? 
A5: Besides structural size and precision tolerance customization of industrial ceramic and quartz products, we support personalized services including custom deep processing, surface treatment, laser marking, custom packaging and technical document customization to meet different industrial and brand standards.