Dense coating with a secure interface
Substrate chemistry and microstructure promote diamond nucleation, reducing the risk of premature coating separation on the 3TBD series during abrasive cutting.
3TBD · Product family
3 Flute Diamond Coated Taper Neck Ball End Mills for Graphite
Diamond coating · individual inspection · dimensional report available
3 Flute Diamond Coated Taper Neck Ball End Mills for Graphite currently shows Ø1–4 mm across 26 standard order codes. It combines a fine-grain carbide substrate selected for diamond-deposition compatibility with a ball-nose cutting profile for 3D electrode contours, curved surfaces, ribs, and mould details. The taper-neck form adds clearance for deep cavity walls while retaining more neck support than a straight reduced neck. Three flutes balance chip evacuation, core strength, and tooth engagement for general graphite profiling.
Standard series specifications
Series-level specifications
Select the end geometry, flute count, and reach style for the required profile, cutting depth, and chip evacuation. The size and price table below lists every standard order code, key dimension, and USD/pc reference price for engineering selection and purchasing.
- Series code
- 3TBD
- Geometry
- Ball nose
- Flute count
- 3
- Diameter range
- Ø1–4 mm
- Reach style
- Taper neck
- Standard size rows
- 26
- Substrate
- Solid carbide
- Coating
- Diamond coating
- Primary material
- Graphite electrodes and abrasive non-metals
3TBD coating and edge-retention evidence
A diamond system engineered for graphite, 10x longer life
Keeping the spherical cutting edge sharp helps control cusp height and surface consistency as the tool follows changing contact points. The taper-neck form adds clearance for deep cavity walls while retaining more neck support than a straight reduced neck.
About 74% less edge retreat after 60 minutes
The shown carbon-resin test records about 0.006 mm edge retreat for diamond coating versus 0.023 mm for TiAlN. For this ball-nose cutting profile for 3D electrode contours, curved surfaces, ribs, and mould details, lower wear supports more consistent profile retention.
AK06 fine-grain carbide substrate
AK06 uses high-quality fine WC powder with controlled grain size and morphology, providing a diamond-compatible substrate for this 3-flute ball nose graphite end mill family.
Detailed codes, dimensions & reference prices
3TBD Series Size & Price Table
26 standard order codes with transparent online USD/pc FOB China prices updated 2026-Sep-14. Standard terms are 100% T/T in advance with a reference lead time of 10–15 working days. Final price and delivery are confirmed against quantity, dimensions, tolerance, and coating requirements.
Showing 26 of 26 rowsAll dimensions in mm
Default cutter diameter tolerance: -0.020 / 0 mm; default corner-radius tolerance: ±0.02 mm. Specify special tolerances in the RFQ.Quote selected codes
Starting parameters for graphite
3F Diamond Taper Neck Ball Nose cutting data selector
Choose cutter diameter, then select the applicable reach or taper combination to view spindle speed, feed rate, axial depth ap, and radial width ae. Use the result as a test-cut starting point and optimise for machine rigidity, actual overhang, runout, and graphite grade.
Select cutting condition
Use the selection to establish first-piece test-cut settings; final values depend on the machine and setup.
Selected reference
Ø1 mm · 3TBD · 3F
Spindle speed
18,900
rev/min
Feed rate
360
mm/min
Axial depth ap
0.2
mm
Radial width ae
0.2
mm
- Effective length
- 20 mm
- Taper angle
- 0.5°
- Vc
- 59.4 m/min
- fz
- 0.0063 mm/tooth
Compare all Ø1 mm parameter sets6 sets · Expand
| Diameter D | Effective length | Taper angle | RPM | Feed | ap | ae | Vc | fz |
|---|---|---|---|---|---|---|---|---|
| mm | mm | deg | rev/min | mm/min | mm | mm | m/min | mm/tooth |
| Ø1 | 20 | 0.5° | 18,900 | 360 | 0.2 | 0.2 | 59.4 | 0.0063 |
| Ø1 | 30 | 0.5° | 17,955 | 342 | 0.18 | 0.18 | 56.4 | 0.0063 |
| Ø1 | 40 | 0.5° | 17,057 | 325 | 0.16 | 0.16 | 53.6 | 0.0064 |
| Ø1 | 25 | 1° | 17,577 | 335 | 0.2 | 0.2 | 55.2 | 0.0064 |
| Ø1 | 35 | 1° | 16,698 | 318 | 0.18 | 0.18 | 52.5 | 0.0063 |
| Ø1 | 50 | 1° | 15,863 | 302 | 0.16 | 0.16 | 49.8 | 0.0063 |
Recommended operations
Small-diameter deep-cavity finishing with added neck support.
Selection notes
- 3-flute geometry: greater tooth engagement for stability and finish in high-speed finishing.
- Confirm taper clearance and neck length against the cavity wall angle.
- Machine graphite dry with effective vacuum extraction; validate parameters for the graphite grade and CNC setup.
Rigidity and handling
Extreme hardness also means brittleness. Use a rigid CNC, precision holder, and secure workholding; control runout especially on long-reach and small-diameter tools, and avoid impact entry.
3TBD dimensional verification
Verified dimensions on every end mill
ZOLLER inspection for every 3TBD end mill
Ball-profile radius, cutter diameter, runout, and the transition into the flute are checked for predictable 3D finishing. Taper-neck sizes also require verification of critical neck and taper dimensions.
- Default cutter diameter tolerance: -0.020 / 0 mm
- Default cutter corner-radius tolerance: ±0.02 mm
- Dimensional report available for order acceptance and traceability
Ball nose abrasive-material machining
Built for abrasive graphite, carbon fiber, and fiberglass
The 3TBD series uses a ball-nose cutting profile for 3D electrode contours, curved surfaces, ribs, and mould details. Its diamond-coated carbide edge is designed for graphite electrodes and, after application validation, abrasive non-metals such as CFRP and GFRP.
For abrasive composite profiling, the rounded end supports contour following; confirm laminate support and entry strategy to control delamination.
Include these items in your RFQ
- Drawing or existing tool code
- Diameter, flute/neck/shank/OAL dimensions
- End geometry, flute count, and radius
- Graphite grade or composite layup
- Machine, holder, and permitted runout
- Annual quantity and target lead time
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