Dense coating with a secure interface
Substrate chemistry and microstructure promote diamond nucleation, reducing the risk of premature coating separation on the 4DCR series during abrasive cutting.
4DCR · Product family
4 Flute Diamond Coated Corner Radius End Mills for Graphite
Diamond coating · individual inspection · dimensional report available
4 Flute Diamond Coated Corner Radius End Mills for Graphite currently shows Ø2–12 mm across 83 standard order codes. It combines a fine-grain carbide substrate selected for diamond-deposition compatibility with a corner-radius geometry for reinforced tips, radiused pocket transitions, shoulders, and electrode walls. The standard-reach form keeps projection compact for rigid, repeatable production machining. Four flutes provide stable tooth engagement for finishing passes and controlled side milling.
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
- 4DCR
- Geometry
- Corner radius
- Flute count
- 4
- Diameter range
- Ø2–12 mm
- Reach style
- Standard reach
- Standard size rows
- 83
- Substrate
- Solid carbide
- Coating
- Diamond coating
- Primary material
- Graphite electrodes and abrasive non-metals
4DCR coating and edge-retention evidence
A diamond system engineered for graphite, 10x longer life
The diamond layer protects the radius and peripheral edge, helping the tool preserve its programmed corner form under abrasive loading. The standard-reach form keeps projection compact for rigid, repeatable production machining.
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 corner-radius geometry for reinforced tips, radiused pocket transitions, shoulders, and electrode walls, 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 4-flute corner radius graphite end mill family.
Detailed codes, dimensions & reference prices
4DCR Series Size & Price Table
83 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 83 of 83 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
4F Diamond Corner Radius 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
Ø2 mm · 4DCR · 4F
Spindle speed
25,000
rev/min
Feed rate
1,840
mm/min
Axial depth ap
0.6
mm
Radial width ae
0.6
mm
- Effective length
- —
- Taper angle
- —
- Vc
- 157.1 m/min
- fz
- 0.0184 mm/tooth
Compare all Ø2 mm parameter sets1 set · Expand
| Diameter D | RPM | Feed | ap | ae | Vc | fz |
|---|---|---|---|---|---|---|
| mm | rev/min | mm/min | mm | mm | m/min | mm/tooth |
| Ø2 | 25,000 | 1,840 | 0.6 | 0.6 | 157.1 | 0.0184 |
Recommended operations
Stable finishing of radiused shoulders, pockets, and electrode walls.
Selection notes
- 4-flute geometry: greater tooth engagement for stability and finish in high-speed finishing.
- Use the shortest safe projection to maximise rigidity.
- 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.
4DCR dimensional verification
Verified dimensions on every end mill
ZOLLER inspection for every 4DCR end mill
Cutter diameter, corner radius, runout, and radius-to-flute blend are checked so the machined fillet follows the programmed profile. A dimensional report can be supplied with the order for acceptance and traceability.
- Default cutter diameter tolerance: -0.020 / 0 mm
- Default cutter corner-radius tolerance: ±0.02 mm
- Dimensional report available for order acceptance and traceability
Corner radius abrasive-material machining
Built for abrasive graphite, carbon fiber, and fiberglass
The 4DCR series uses a corner-radius geometry for reinforced tips, radiused pocket transitions, shoulders, and electrode walls. Its diamond-coated carbide edge is designed for graphite electrodes and, after application validation, abrasive non-metals such as CFRP and GFRP.
The reinforced corner is useful where abrasive composites place concentrated load on the tool tip; validate the radius against the finished feature.
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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