Description
Product Overview
This diamond-coated carbide ball nose end mill is designed
for graphite cavities, curved surfaces, inclined features,
free-form profiles and three-dimensional machining of
graphite electrodes and graphite molds.
It combines an MG carbide substrate with an approximate
grain size of 1.0 μm, 6% cobalt content, diamond coating,
a 35° helix, a 6° positive rake angle and precision-polished
cutting edges to improve wear resistance, dust evacuation
and contour-machining stability.
Recommended Machining Applications
The full-radius ball nose profile provides continuous cutting
contact during graphite cavity, curved-surface and
three-dimensional contour machining.
Graphite Cavity Machining
Suitable for recessed areas, internal contours and
graphite cavities with continuously changing
cutting engagement.
Curved-Surface Milling
Designed for rounded profiles, free-form surfaces
and complex graphite electrode geometries.
Inclined-Surface Machining
Supports sloped surfaces and transition features
where the effective cutting position changes
continuously along the toolpath.
3D Contour Finishing
Suitable for detailed three-dimensional electrode
profiles, mold surfaces and precision finishing.
Designed for Graphite Machining Challenges
Graphite is highly abrasive and generates fine dust during
machining. The carbide substrate, diamond coating and flute
geometry are designed to control wear, evacuation and
contour accuracy.
Wear and Edge Protection
- Diamond coating resists abrasive graphite particles
- MG carbide provides a wear-resistant substrate
- 6% cobalt supports carbide hardness
- Polished cutting edges reduce microscopic defects
- 50× inspection verifies cutting-edge condition
- Suitable for repetitive electrode production
Dust and Contour Control
- Optimized flute space supports dust evacuation
- 35° helix assists graphite-particle movement
- 6° positive rake reduces cutting resistance
- Precision ball radius improves contour consistency
- Radial runout is controlled within 0.003 mm
- Effective dust extraction is recommended
Ball Nose Geometry and Cutting Performance
The wear-resistant carbide substrate, diamond coating,
precision ball profile and polished cutting edge work together
to support stable graphite cavity and contour machining.
MG 1.0 μm Carbide Substrate
The MG carbide substrate uses an approximate grain
size of 1.0 μm to provide high wear resistance and
stable performance in abrasive graphite machining.
6% Cobalt Content
The 6% cobalt content supports carbide hardness
and resistance to abrasive wear during graphite
electrode and mold machining.
Diamond Coating
The diamond coating provides high surface hardness,
wear resistance and corrosion resistance for graphite
and other abrasive non-metallic materials.
Wear Resistance 5–10 Times Higher
Under suitable machining conditions, the diamond
coating may provide approximately five to ten times
the wear resistance of conventional tool coatings.
Heat Resistance up to 1000°C
The coating is designed to maintain stable performance
at elevated temperatures up to approximately 1000°C
under suitable cutting conditions.
High Thermal Conductivity
Thermal conductivity of approximately 2000 W/(m·K)
helps transfer and distribute localized cutting heat
away from the tool-contact area.
Full-Radius Ball Nose Profile
The full-radius cutting profile provides continuous
contact during graphite cavity, curved-surface,
inclined-surface and 3D contour machining.
35° Helix Geometry
The 35° helix supports stable cutting engagement,
controlled graphite-dust movement and consistent
curved-surface machining.
6° Positive Rake Angle
The positive rake angle supports cleaner cutting
and helps reduce cutting resistance and stress
concentration at the cutting edge.
Precision-Polished Cutting Edge
Fine edge polishing helps reduce microscopic defects
and supports smoother cutting and more consistent
graphite surface quality.
Optimized Dust-Evacuation Flutes
The optimized flute structure provides sufficient
space for fine graphite particles and helps reduce
dust accumulation around the cutting area.
Optional Internal Air or Coolant Channels
Applicable customized specifications can include
internal air or coolant channels to support dust
evacuation and temperature control.
Radial Runout ≤ 0.003 mm
Controlled radial runout improves cutting-edge load
distribution, contour consistency and surface-machining
stability.
Dimensional Tolerance Within ±0.005 mm
Tool dimensions are controlled within approximately
±0.005 mm to support precision electrode, cavity
and contour machining.
Ball Radius Accuracy Within 5 μm
Precision grinding and profile inspection help
control the ball radius within approximately 5 μm
for repeatable graphite cavities and 3D contours.
Walter Five-Axis Grinding
Walter five-axis precision grinding supports stable
dimensions, ball-profile accuracy and consistent
cutting-edge geometry.
HELICHECK PLUS Measurement
Walter HELICHECK PLUS profile measurement supports
accurate inspection of tool dimensions, ball radius
and cutting geometry.
50× Microscopic Edge Inspection
Every tool is inspected under 50× magnification
to verify that the cutting edge is free from visible
chipping, serrations and abnormal coating defects.
Extended Tool Life in Graphite Machining
Diamond coating and wear-resistant carbide are intended
for high-volume graphite production where abrasive wear
can affect radius accuracy and surface consistency.
Compared with General-Purpose End Mills
- Potential tool-life improvement of 10–50 times
- Reduced abrasive flank wear
- Longer ball-radius stability
- Reduced frequency of tool replacement
- Suitable for batch electrode production
Compared with Uncoated Carbide Tools
- Potential tool-life improvement of 3–10 times
- Improved resistance to graphite abrasion
- More consistent cutting-edge condition
- Improved contour-machining stability
- Reduced tool consumption
Actual tool life depends on graphite grade, cutting
parameters, tool diameter, tool overhang, machine rigidity,
dust extraction and machining strategy. Application testing
is recommended.
Standard Graphite Ball Nose End Mill Sizes
Standard metric sizes, long-neck tools, extended-reach
configurations and customized dimensions are available
for graphite electrode and mold machining.
| Tool Diameter | Standard Metric Sizes / Custom Diameter |
|---|---|
| Ball Radius | R = 1/2 of Tool Diameter |
| Flute Length | Standard / Extended / Custom |
| Neck Length | Standard / Long Neck / Custom |
| Shank Diameter | Standard Shank / Custom Shank |
| Overall Length | Standard / Extended Length / Custom |
| Flute Options | 2 Flutes / Custom |
Send us the required diameter, ball radius, flute length,
neck length, shank diameter, overall length, graphite
grade and order quantity to receive the current size
list and quotation.
Available Configurations
Standard and customized diamond-coated carbide ball nose
end mills can be supplied according to the graphite grade,
cavity depth, surface geometry and reach requirement.
| Tool Type | Carbide Ball Nose End Mill for Graphite |
|---|---|
| Flute Options | 2 Flutes / Custom |
| Carbide Grade | MG Carbide |
| Carbide Grain Size | Approximately 1.0 μm |
| Cobalt Content | 6% |
| Coating | Diamond Coating |
| Heat Resistance | Up to Approximately 1000°C |
| Thermal Conductivity | Approximately 2000 W/(m·K) |
| Helix Angle | 35° |
| Rake Angle | 6° Positive Rake Angle |
| Cutting Edge | Precision-Polished Edge |
| Radial Runout | ≤ 0.003 mm |
| Dimensional Tolerance | Within Approximately ±0.005 mm |
| Ball Radius Accuracy | Within Approximately 5 μm |
| Dust Evacuation | Optimized Flute Geometry |
| Internal Channel Option | Available for Applicable Custom Designs |
| Main Operations |
Cavity Machining / Curved Surfaces / Inclined Surfaces / 3D Contouring / Precision Finishing |
| Diameter and Length |
Standard Sizes / Long Neck / Extended Reach / Custom Dimensions |
| Marking |
ZHY Logo / Customer Logo / Customer Model Number |
| Packaging |
Standard Packaging / Private-Label Packaging |
Recommended Workpiece Materials
This carbide ball nose end mill is primarily positioned
for graphite electrodes, graphite molds, curved cavities
and three-dimensional graphite profiles.
Wholesale and OEM Support
ZHY supplies standard and customized diamond-coated carbide
ball nose end mills for distributors, graphite electrode
manufacturers, mold companies, CNC workshops and
private-label tool brands.
Wholesale Order Support
- Standard and mixed-size orders
- 2-flute and customized configurations
- Standard, long-neck and extended-reach tools
- Samples for graphite machining tests
- Bulk quotations based on size and quantity
- Application review based on graphite grade
OEM and Private Label
- Customer logo laser marking
- Customer product and model numbers
- Custom labels and barcode stickers
- Plastic box and outer carton options
- Private-label packaging support
- Packaging verification before shipment
Production and Ball Radius Inspection
Precision grinding, profile measurement and microscopic
inspection support consistent ball geometry, cutting-edge
quality and repeatable batch delivery.
Request a Graphite Ball Nose End Mill Quotation
Send us the required diameter, ball radius, flute length,
neck length, overall length, graphite grade, cavity or
electrode feature, quantity and packaging requirements.
Our team will review the application and provide a
suitable quotation.
