G25 Cemented Carbide Ball Diameter 73.05mm Big Ball with Coating
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Product Highlights
- Mirror Surface Finish: Smoothness can reach mirror R0.4 for superior performance.
- DLC Coating Options: Coated with DLC for excellent wear, friction, and corrosion resistance.
- Wide Size Range: Stock sizes from 0.4mm to 20mm; other sizes customizable.
- High Precision Grades: Available in G3 to G1000 grades with tight sphericity tolerances.
- Multiple Material Grades: WC-Co, WC-Ni, Tungsten, and Pure Tungsten options available.
- ISO Certified Manufacturer: Professional manufacturer with ISO certification since 2008.
- Custom Design Support: OEM accepted; custom parts designed from drawings or samples.
- 100% Quality Inspection: Complete advanced testing instrumentation and detailed reports.
Product Attributes
- Customization
- Available
- Application
- Oil Sealing, Bearing Ball, Metering and Milling
- Standard
- GB
- Purity
- >99.95%
- Alloy
- Tc, Hard Metal, Hard Alloy, Tungsten Steel
- Shape
- Round
- Type
- Wc92%+Co8%
- Grade
- Tungsten Carbide Mc8
- Grain Size
- 1.2-1.6 μm
- Tolerance Grade
- G25
- Sphericity
- 0.000025"
- Density
- 14.7-14.78g/Cm³
- Hardness
- 89.5-90.5hra
- Bending Strength
- >2300MPa
- Surface Finish
- Coating
- Features
- Resistant to Wear Corrosion and Impact
- Transport Package
- Inner Vacuum Packing, Outer Standard Export Carton
- Specification
- 0.4mm to 20mm; 1/16″ to 1-1/4″ in Inch
- Trademark
- Miller ™
- Origin
- Zhuzhou, China
- HS Code
- 820900
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Product Description
Miller is an ISO certified professional manufacturer for tungsten carbide balls since 2008, and uniquely positioned to help you identify and source the correct carbide balls for your application. Balls coated with such as DLC(diamond like carbon), obtain a series of comprehensive excellent properties, such as good wear resistance, low friction coefficient, good corrosion resistance etc. The smoothness of carbide ball we produced can reach mirror R0.4.
As a professional tungsten carbide balls producer, Miller carbide keeps stock in sizes of 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 1.0mm, 1.5mm, 2.0mm, 2.5mm, 3.0mm, 3.5mm,4.0mm, 5mm, 6.0mm, 6.5mm, 7.0mm, 7.5mm, 8.0mm, 8.5mm, 9.0mm,9.5mm, 10.0mm, 10.5mm, 11mm, 11.5mm, 12mm, 12.5mm, 13mm, 13.5mm,14mm, 14.5mm, 15mm, 15.5mm, 16mm, 16.5mm, 17mm, 17.5mm, 18mm, 18.5mm, 19mm, 19.5mm, 20mm
Other sizes could be customized if needed.
| Grade | Sphericity in inches | Sphericity in mm | Basic Diameter Tolerance in inches |
Basic Diameter 2 in mm |
Maximun Surface Roughness |
|
G3
|
0.000003" | 0.0000762mm | +/-0.00003" | +/-0.000762mm | 0.5 |
| G5 |
0.000005" | 0.000127mm | +/-0.00005" | +/-0.00127mm | 0.8 |
| G10 |
0.000010" | 0.000254mm | +/-0.0001" | +/-0.00254mm | 1 |
| G25 |
0.000025" | 0.000635mm | +/-0.0001" | +/-0.00254mm | 2 |
| G50 |
0.000050" | 0.00127mm | +/-0.0002" | +/-0.00508mm | 3 |
| G100 |
0.0001" | 0.00254mm | +/-0.0005" | +/-0.0127mm | 5 |
| G200 |
0.0002" | 0.00508mm | +/-0.001" | +/-0.0254mm | 8 |
| G500 |
0.0005" | 0.0127mm | +/-0.002" | +/-0.0508mm | |
| G1000 |
0.001" | 0.0254mm | +/-0.005" | +/-0.127mm |
Grade: Miller manufactured 4 main grade ( chemical composition) of carbide balls
1. WC92% + 8% Co (In request of more wear-resistance, we suggest to use WC-Co grades. )
2. WC92% + 8% Ni (In most corrosion-wear situations, an optimum choice is the WC-Ni grades, which are resistant down to pH 2 to 3.)
3. W85%-97%+Ni+Fe Tungsten balls (Density 15.5-18.5g/cm3, mostly are used in the field of shots and counterweight. such as the fish pendant, Oil drilling balance,Ball valves and bearings, Shotgun bullet, Armor-piercing bullet…)
4. W99.95% Pure tungsten balls (Density 19.0-19.2g/cm3, mostly are used in Aerospace, aviation, electrical Instrumentation, laboratory…)
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Semi-precision ball Sintered rough ball

Miller Carbide is an experienced manufacturer of tungsten carbide customized parts started from 2008. Our products cover carbide grinding jars & mortars, carbide grinding balls, carbide pegs, carbide static & dynamic rings, bead mill disks, carbide stirring rods, carbide static & dynamic jaws, carbide crusher plates, carbide grinding discs, carbide rotors, carbide roll rings, carbide guide rolls, carbide burrs, carbide sleeves & bushings, and other customized wear-resistant components for valve and pumps ect. With years of tungsten carbide engineering and manufacturing experience, we can concentrate our skills to the development of customized products for a wide spread of wear applications in milling & crushing industry.
Unlike other suppliers, Miller operates with three disciplines: Engineering, manufacturing and after sale service support. This means we are able to improve the efficiency of your machine and tools with customized products and direct access to the manufacturer. Miller Carbide works closely with its customers to ensure their requirements are designed efficiently and suitable for application. We can design the components needed from drawings or delivered samples.
We adhere to the management principles of "quality first, customer first and credit-based" since the establishment of the company and always do our best to satisfy potential needs of our customers. We are sincerely willing to cooperate with enterprises from all over the world in order to realize a win-win situation since the trend of economic globalization has developed with an irresistible force.

We Offer You These
| Direct Sales Integrating R&D, production sales and technology |
Mold customization Rich molds OEM customization accepted |
Adequate equipment grinding/pressing sintering/deep processing |
Technical strength 15 years of experience in technical team, research & innovation |
1. How long is your delivery time?
We can arrange the shipment within 3-5 working days upon receipt of your payment for any sintered blanks stocked items. As for the mass production order or the customized products, we will need 10-30 days production leadtime and indicate the delivery time on the Proforma lnvoice.
Contact us now! Get your free quote!
About the Supplier
This supplier has been audited by SGS. Verify the report on the official SGS website with ID "QIP-ASI239982". Items marked "" are certified.
Company Profile
Miller Carbide is an experienced manufacturer of tungsten carbide customized parts started from 2008. Our products cover carbide grinding jars & bowls & mortars, carbide grinding balls, carbide pegs, carbide static & dynamic rings, bead mill disks, carbide stirring rods, carbide static & dynamic jaws, carbide crusher plates, carbide grinding discs, carbide rotors, carbide roll rings, carbide guide rolls, carbide inserts, carbide burrs, carbide sleeves & bushings, and other customized wear-resistant components for valve and pumps ect. With years of tungsten carbide engineering and manufacturing experience, we can concentrate our skills to the development of customized products for a wide spread of wear applications in milling & crushing industry.
Unlike other suppliers, Miller operates with three disciplines: Engineering, manufacturing and after sale service support. This means we are able to improve the efficiency of your machine and tools with customized products and direct access to the manufacturer. Miller Carbide works closely with its customers to ensure their requirements are designed efficiently and suitable for application. We can design the components needed from drawings or delivered samples.
We adhere to the management principles of "quality first, customer first and credit-based" since the establishment of the company and always do our best to satisfy potential needs of our customers. We are sincerely willing to cooperate with enterprises from all over the world in order to realize a win-win situation since the trend of economic globalization has developed with an irresistible force.
About Our Factory & Business Background
-
Business Type
- Manufacturer/Factory & Trading Company
- Address
- Auto Parts Industrial Park, Area C Building 7, Zhongda Road, Zhuzhou, Hunan, China
-
Plant Area
- 800 square meters
-
Number of Employees
- 16
-
Terms of Payment
- LC, T/T, D/P, PayPal, Western Union, Small-amount payment
-
International Commercial Terms(Incoterms)
- FOB, CIF, CFR, EXW
-
Average Lead Time
-
Peak Season Lead Time: one month
Off Season Lead Time: within 15 workdays -
Nearest Port
- Guangzhou Port; Shenzhen Port; Shanghai Port
-
Minimum Order Quantity
- 10 Pcs
-
Supply Chain Partners
- 7
Our Production Capability & Technical Expertise
-
Main Products
- carbide ball, carbide rings, Tic Roller, TC roller, tungsten carbide rod, carbide plate, carbide bushing, TC peg, carbide wear plate, carbide cutting ring, carbide inserts, carbide grinding jars
-
Production Lines
- 1
-
Production Machines
- Ball Mill, VMS, Pressing Machine, Grinder
-
QA/QC inspectors
- 1 people
-
Inspection Type for Finished Products
- 100% inspection(Visual inspection)
-
Inspection Method for Finished Products
- Have instructions and uniformly followed
-
Customization Options
- Customization from Designs, Full Customization
-
R&D Engineers
- 1 people
-
Traceability of Raw Materials
- Yes
-
Own Brand
- Yes
Our Industry Experience & Global Business Record
-
Year of Establishment
- 2018-07-05
-
Export Year
- 5 Years
-
Main Markets
- North America, South America, Europe
-
Repeat Buyers Choice
- 50%~80%
-
Number of Foreign Trading Staff
- 3
-
Overseas Agent/Branch
- No
-
New Products Launched in Last year
- No
Our Certifications, Standards & Industry Recognition
-
Cooperated with Fortune 500
- No
FAQ
- How long is your delivery time?
- We can arrange shipment within 3-5 working days for stocked sintered blanks. For mass production or customized products, the lead time is 10-30 days, indicated on the Proforma Invoice.
- Can I get a sample for quality checking? Is it free?
- Yes, we offer free samples if they are in stock, with freight collected. For special or non-standard shaped samples, we charge only the basic production costs.
- What grade should I choose for the product?
- If you are unsure, please provide the usage information. Our technical team will suggest the most suitable grade based on your specific application needs.
- Do you use recycled materials?
- No, we insist on quality first. All our products are made of virgin raw materials to ensure high standards.
- Can you make goods according to my sample or drawing? What is the MOQ?
- Yes, we accept customization from drawings or samples. For customized items, the MOQ is quoted individually. For standard items in stock, there is no limitation on MOQ.
- Can I negotiate the prices?
- Yes, we can consider discounts for bulk orders.
- Do you provide a warranty for your products?
- Yes, we provide a 100% satisfaction guarantee. We conduct strict inspections (IQC, PQC, FOC) and will provide replacements at our cost if any quality problems occur.
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