Tungsten Carbide WC-Co YG8 Mill Jar 50mL-20L ATOMFAIR®

WC-CO TUNGSTEN CARBIDE PLANETARY MILL JAR 50ML-25L HRA 93 NANO GRIND

RESEARCH GRADE MATERIAL

Product Overview

ATOMFAIR® Tungsten Carbide Planetary Ball Mill Jar (WC-Co Grinding Jar) is manufactured from premium tungsten carbide cobalt cemented carbide (YG8 standard formulation: WC 92% + Co 8%) via powder metallurgy vacuum high-pressure integrated sintering. With WC-Co YG8 density 14.5-15.0 g/cm³ HRA 88-93 specifications—the highest density among all commercially available grinding jars, 2.5× zirconia, 4× alumina, and nearly 2× stainless steel—this jar delivers unparalleled impact crushing power during planetary high-speed operation. Purpose-built for ultra-hard material nano-scale grinding, it effortlessly pulverizes diamond micropowder, silicon carbide, boron carbide, and cubic boron nitride to nanometer fineness. The vacuum sintered mirror polished non-stick interior features zero porosity, zero pitting, and a non-stick surface for clean material discharge and easy cleaning. The cobalt binder phase provides exceptional toughness (bending strength ≥2800 MPa) that prevents edge chipping and cracking under high ball-to-powder ratios and high rotation speeds—a critical advantage over brittle ceramic jars. Standard configuration includes WC-Co jar body + matching material sealing lid + silicone sealing gasket. Optimal grinding media pairing: same-grade WC-Co cemented carbide grinding balls only (homogeneous material matching prevents jar wear). This jar is exclusively for vertical planetary ball mills—not for roller jar mills. Standard volumes from 50 ml to 25 L available in thick-wall and thin-wall configurations; custom sizes upon request at inquiry@atomfair.com.

Technical Specifications

PARAMETER	DETAILS
Material	Tungsten Carbide Cobalt Cemented Carbide (YG8: WC 92% + Co 8%)
Manufacturing Process	Powder Metallurgy Vacuum High-Pressure Integrated Sintering
Standard Configuration	WC-Co Jar Body + Matching Material Sealing Lid + Silicone Sealing Gasket
Compatible Equipment	Vertical Planetary Ball Mills Only (Not for Roller Jar Mills)
Density	14.5–15.0 g/cm³ (Highest Among All Commercial Grinding Jars)
Hardness	HRA 88–93, Mohs ≥ 9
Bending Strength	≥ 2800 MPa (High Toughness, Impact Resistant, Non-Chipping)
Maximum Operating Temperature	Long-Term: 500°C (No Hardness/Wear Degradation); Short-Term: 1000°C
Wear Grade	Industry Top Tier—Ultra-Low Wear Rate; Virtually No Jar Debris Shedding
Chemical Stability	Resistant to Weak Acids, Weak Alkalis, and Most Organic Solvents; Not for HF or Concentrated Strong Alkali Long-Term Immersion
Interior Finish	Mirror Polished, Zero Porosity, Zero Pitting, Non-Stick Powder Surface, Easy Cleaning
Custom Configurations	Custom volumes and dimensions (thick-wall / thin-wall) are available upon request. Please contact us via email at inquiry@atomfair.com.

Standard Size Specifications (Thick-Wall & Thin-Wall)

NOMINAL VOLUME	THICK-WALL OD (mm)	THICK-WALL ID (mm)	THICK-WALL H (mm)	THIN-WALL OD (mm)	THIN-WALL ID (mm)	THIN-WALL H (mm)
50 ml	48	38	54	–	–	–
100 ml	62	48	72	–	–	–
250 ml	87	71	83	–	–	–
500 ml	106	90	108	88	81	110
1 L (1000 ml)	131	115	118	107	100	140
1.5 L	131	115	158	132	125	140
2 L	157	141	148	132	125	181
4 L	178	162	213	179	170	186
5 L	192	182	209	–	–	–
10 L	243	232	259	–	–	–
20 L	320	310	284	–	–	–

Key Features & Advantages

Industry’s Highest Density (14.5–15.0 g/cm³)—Maximum Grinding Kinetic Energy: Density is 2.5× zirconia, 4× alumina, and nearly 2× stainless steel jars. Planetary high-speed impact crushing effortlessly pulverizes diamond, SiC, B₄C, and cBN to nanometer-level ultrafine powder that conventional ceramic jars cannot achieve.
Extreme Wear Resistance with Virtually Zero Jar Material Loss: When paired with same-grade WC-Co balls, jar wall wear is negligible even under continuous long-duration grinding. For high-value material processing, the extended service life delivers the lowest long-term consumable cost despite higher initial investment.
High Hardness + High Toughness—Impact Resistant Without Cracking: The cobalt binder phase buffers high-speed grinding impact. Unlike brittle ceramic jars (corundum, agate) that chip and crack under high ball-to-powder ratios and high rotation speeds, the WC-Co jar maintains structural integrity with bending strength ≥2800 MPa.
Dense Non-Porous Vacuum Sintered Structure with Mirror Interior: One-piece high-pressure vacuum sintering eliminates internal porosity. The mirror-polished, non-stick interior releases only trace W and Co—free from Al, Fe, and Zr contamination—with zero pitting or powder adhesion for clean discharge.

APPLICATION SCOPE: Ultra-hard inorganic powder research and production: diamond micropowder, silicon carbide (SiC), boron carbide (B₄C), cubic boron nitride (cBN), and corundum powder nano-scale grinding. Cemented carbide industry: WC-Co raw powder and cutting tool raw material mechanical alloying. Advanced ceramic powders: high-purity silicon nitride (Si₃N₄), titanium carbide (TiC), and other ultra-high-hardness specialty ceramic precursors. Gemstone and abrasive processing: synthetic gemstones and diamond abrasive ultrafine refinement. Refractory metal alloys: tungsten (W), molybdenum (Mo), and chromium (Cr) high-hardness alloy powder mixing and refinement. Exclusively for vertical planetary ball mills—both dry ultrafine grinding and wet slurry processing supported.

MANDATORY GRINDING MEDIA PAIRING: Only WC-Co cemented carbide grinding balls may be used. Zirconia, alumina, stainless steel, agate, and all other ball materials with hardness lower than WC-Co will severely scratch the jar inner wall during high-speed planetary grinding, generating massive jar debris contamination of samples. Homogeneous material matching (WC-Co jar + WC-Co balls) is the only acceptable configuration.

IMPORTANT NOTICE: Strictly prohibited for lithium battery (NCM/LFP), high-purity electronic ceramics, and trace element detection samples—grinding releases trace W and Co metals that will completely compromise these materials. Hydrofluoric acid (HF) and concentrated strong alkali systems prohibited: HF corrodes the cemented carbide matrix; long-term strong alkali immersion accelerates cobalt phase dissolution with dramatically increased W/Co impurity release. Avoid rapid thermal shock: direct water cooling after high-temperature grinding generates internal stress, causing invisible cracking and accelerated degradation. Severe impact and dropping prohibited: despite superior toughness compared to ceramics, severe impact can still produce hidden cracks leading to later fracture—handle with care during transport and clamping. Replace damaged jars immediately: discard jars showing inner wall scratching, chipping, or edge spalling—tungsten and cobalt debris release increases dramatically at damage sites. Cost advisory: WC-Co jar purchase cost is substantially higher than ceramic and stainless steel jars. These jars are exclusively recommended for ultra-high-hardness, difficult-to-grind materials. For ordinary ores and pigment grinding, ceramic or stainless steel jars offer better cost-effectiveness. For custom volumes and specifications, contact us at inquiry@atomfair.com.

TAILORED SOLUTIONS FOR RESEARCH

Contact our engineering team for technical support or official quotations.

EMAIL: inquiry@atomfair.com

Manufacturer: Atomfair LLC

Brand: ATOMFAIR®

This jar is exclusively for use in vertical planetary ball mills and must be paired with same-grade WC-Co cemented carbide grinding balls. It is not compatible with hydrofluoric acid, concentrated strong alkali, or materials sensitive to trace tungsten and cobalt contamination such as lithium battery cathodes and high-purity electronic ceramics.

Compatible Equipment: This jar is designed for vertical planetary ball mills only and must not be used in roller jar mills.
Grinding Media Pairing: Only WC-Co cemented carbide grinding balls of the same grade are permitted; other ball materials will scratch the jar inner wall and cause sample contamination.
Prohibited Applications: The jar is prohibited for lithium battery materials, high-purity electronic ceramics, and trace element detection samples due to unavoidable trace tungsten and cobalt release.
Chemical Stability: The jar resists weak acids, weak alkalis, and most organic solvents but must not be used with hydrofluoric acid or concentrated strong alkali for long-term immersion.
Thermal and Mechanical Handling: Avoid rapid thermal shock such as direct water cooling after high-temperature grinding and prevent severe impact or dropping which can cause hidden cracks and eventual fracture.

FAQ

Why does the WC-Co jar's density of 14.5–15.0 g/cm³ provide superior grinding performance for ultra-hard materials compared to zirconia or alumina jars?

The WC-Co jar's density is 2.5× that of zirconia, 4× that of alumina, and nearly 2× that of stainless steel, generating maximum kinetic energy during planetary high-speed impact crushing. This enables nano-scale grinding of diamond, SiC, B₄C, and cBN that conventional ceramic jars cannot achieve. The mirror-polished non-stick interior with zero porosity ensures clean material discharge and easy cleaning.

What are the mandatory grinding media pairing requirements and prohibited applications for the WC-Co planetary mill jar?

Only WC-Co cemented carbide grinding balls may be used; any lower-hardness media (zirconia, alumina, stainless steel, agate) will severely scratch the jar inner wall and cause massive sample contamination. The jar is strictly prohibited for lithium battery materials (NCM/LFP), high-purity electronic ceramics, and trace element detection samples due to trace W and Co release. It is also incompatible with hydrofluoric acid and concentrated strong alkali systems.

What handling precautions are critical to prevent damage and contamination when using the WC-Co jar?

Avoid rapid thermal shock—direct water cooling after high-temperature grinding generates internal stress causing invisible cracking and accelerated degradation. Handle with care during transport and clamping to prevent severe impact that can produce hidden cracks leading to later fracture. Replace jars immediately if inner wall scratching, chipping, or edge spalling is observed, as tungsten and cobalt debris release increases dramatically at damage sites.

Assessment

The ATOMFAIR Tungsten Carbide Planetary Ball Mill Jar (WC-Co YG8) delivers the highest density (14.5-15.0 g/cm³) among commercial grinding jars, enabling nano-scale grinding of ultra-hard materials such as diamond, SiC, and B4C. However, it mandates exclusive use of WC-Co grinding media and is unsuitable for lithium battery materials, high-purity electronic ceramics, or trace element analysis due to trace W and Co contamination, with a substantially higher initial cost than ceramic or stainless steel alternatives.

Positive

Highest Density for Maximum Grinding Energy: Density 14.5-15.0 g/cm³ (2.5× zirconia, 4× alumina, ~2× stainless steel) provides unmatched kinetic energy for pulverizing ultra-hard materials like diamond and SiC to nanometer fineness.
Extreme Wear Resistance and Toughness: When paired with same-grade WC-Co grinding balls, jar wall wear is negligible due to homogeneous material matching, while bending strength ≥2800 MPa prevents chipping and cracking under high-impact conditions.

Trade-offs

Not for Lithium Battery or Trace Analysis: Trace release of W and Co during grinding contaminates lithium battery materials (NCM/LFP), high-purity electronic ceramics, and trace element detection samples, making the jar unsuitable for these applications.
Higher Cost and Handling Precautions Required: Initial purchase cost is substantially higher than ceramic or stainless steel jars; additionally, the jar is sensitive to thermal shock and severe impact, requiring careful handling and immediate replacement if damaged.

Quality Standards & Performance Verification

Every advanced material, component, equipment, and instrument in our catalog is backed by rigorous testing. We maintain strict internal quality management frameworks and align with CE conformity metrics to deliver transparent, reproducible performance data via our public open-science repository.

To request raw batch performance data, submit formal vendor registration paperwork, or execute a fast-turnaround R&D manufacturing loop, contact us at inquiry@atomfair.com.

Shipping & Returns

Item is dispatched under the Atomfair Shipping & Delivery Framework (Free worldwide shipping on orders over $59 USD excl. heavy equipment). Return is governed by the Atomfair Return & Refund Policy (7-day technical return window).