JIS800 black silicon carbide for producing polishing wheels
Product Introduction: JIS800 Black Silicon Carbide – Premium Abrasive for Polishing Wheel Manufacturing
Product Name: JIS800 Black Silicon Carbide
Application: Production of resin-bonded, vitrified, and metal-bonded polishing wheels
1. Overview
JIS800 Black Silicon Carbide is a high-performance micro-grit abrasive specifically engineered for the manufacturing of precision polishing wheels. Manufactured strictly in accordance with Japanese Industrial Standard (JIS) R6001 for 800# grit, this product delivers exceptional uniformity, sharpness, and thermal stability. It is the material of choice for polishing hard and brittle materials such as cemented carbides, optical glass, ceramics, and non-ferrous metals.
2.PHYSICAL PROPERTIES and TYPICAL CHEMICAL ANALISIS [%]
| Specific Weight | 3.95 g/ cm3 |
| Mohs Hardness | 9.15 |
| Maximum service temperature | 1900℃ |
| Melting Point | 2250℃ |
| SiC | Fe2O3 | F.C | F.Si | SiO2 | LOI |
| ≥98.5 | ≤0.10 | ≤0.20 | ≤0.20 | ≤0.50 | < 0.05 |
HAPTER Ⅰ（JIS STANDARD）
| Size | DO(um) | D3(um) | D50(um) | D94(um) |
| #240 | ≤127 | ≤103 | 57.0±3.0 | ≥40 |
| #280 | ≤112 | ≤87 | 48.0±3.0 | ≥33 |
| #320 | ≤98 | ≤74 | 40.0±2.5 | ≥27 |
| #360 | ≤86 | ≤66 | 35.0±2.0 | ≥23 |
| #400 | ≤75 | ≤58 | 30.0±2.0 | ≥20 |
| #500 | ≤63 | ≤50 | 25.0±2.0 | ≥16 |
| #600 | ≤53 | ≤41 | 20.0±1.5 | ≥13 |
| #700 | ≤45 | ≤37 | 17.0±1.5 | ≥11 |
| #800 | ≤38 | ≤31 | 14.0±1.0 | ≥9.0 |
| #1000 | ≤32 | ≤27 | 11.5±1.0 | ≥7.0 |
| #1200 | ≤27 | ≤23 | 9.5±0.8 | ≥5.5 |
| #1500 | ≤23 | ≤20 | 8.0±0.6 | ≥4.5 |
| #2000 | ≤19 | ≤17 | 6.7±0.6 | ≥4.0 |
| #2500 | ≤16 | ≤14 | 5.5±0.5 | ≥3.0 |
| #3000 | ≤13 | ≤11 | 4.0±0.5 | ≥2.0 |
| #4000 | ≤11 | ≤8.0 | 3.0±0.4 | ≥1.8 |
| #6000 | ≤8.0 | ≤5.0 | 2.0±0.4 | ≥0.8 |
| #8000 | ≤6.0 | ≤3.5 | 1.2±0.3 | ≥0.6 |
CHAPTER Ⅱ（FEPA STANDARD）
| Size | D3(um) | D50(um) | D94（um) |
| F230 | ＜82 | 53.0±3.0 | >34 |
| F240 | ＜70 | 44.5±2.0 | >28 |
| F280 | ＜59 | 36.5±1.5 | >22 |
| F320 | ＜49 | 29.2±1.5 | >16.5 |
| F360 | ＜40 | 22.8±1.5 | >12 |
| F400 | ＜32 | 17.3±1.0 | >8 |
| F500 | ＜25 | 12.8±1.0 | >5 |
| F600 | ＜19 | 9.3±1.0 | >3 |
| F800 | ＜14 | 6.5±1.0 | >2 |
| F1000 | ＜10 | 4.5±0.8 | >1 |
| F1200 | ＜7 | 3.0±0.5 | >1(at 80%) |
| F1500 | ＜5 | 2.0±0.4 | >0.8(at 80%) |
| F2000 | ＜3.5 | 1.2±0.3 | >0.5(at 80%) |
3. Why Choose JIS800 Black Silicon Carbide for Polishing Wheels?
A. Precision Particle Size Distribution
Strictly controlled to JIS800 standards ensures uniform cutting action across the entire polishing wheel surface. This results in consistent surface finishes (Ra) on workpieces, eliminating deep scratches or uneven gloss.
B. High Hardness & Self-Sharpening Ability
Black silicon carbide is significantly harder than aluminum oxide (white or brown corundum). During polishing, its sharp, brittle grains fracture under controlled pressure, continuously exposing fresh cutting edges. This self-sharpening property extends the life of the polishing wheel and maintains high removal rates without glazing.
C. Excellent Thermal Conductivity
With a thermal conductivity of approximately 100 W/m·K (much higher than alumina-based abrasives), JIS800 Black SiC rapidly dissipates frictional heat generated during high-speed polishing. This prevents thermal damage (burns, micro-cracks, or oxidation) to sensitive workpieces such as optical glass or carbide blades.
D. Chemical Compatibility
High-purity SiC (≥98.5%) contains minimal iron, sulfur, or other contaminants. It exhibits good chemical inertness with standard resin, vitrified, and metal bond systems, ensuring strong grain retention and predictable wheel performance.
4. Typical Applications in Polishing Wheel Production
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Resin-bonded polishing wheels for finishing carbide cutting tools and molds.
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Vitrified-bonded wheels for precision polishing of ceramic substrates and optical lenses.
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Metal-bonded segments for lapping and polishing non-ferrous metals (e.g., aluminum, titanium alloys).
5. Advantages Compared to Other Abrasives
| Property | JIS800 Black SiC | White Fused Alumina |
|---|---|---|
| Hardness | Higher (9.5 Mohs) | Lower (9.0 Mohs) |
| Fracture toughness | Brittle, sharp | Tougher, duller |
| Heat dissipation | Excellent | Moderate |
| Best for | Hard/brittle materials | Softer steels |
6. Packaging & Storage
Available in 25 kg net weight multi-layer paper bags or heavy-duty plastic woven bags. Store in a dry, ventilated warehouse away from moisture and corrosive gases. Shelf life is unlimited under proper storage conditions.
7. Company Certification
