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PCD Spiral Round-Bottom Router Bit
20 mm-shank PCD round-bottom cutter family for shaped recesses such as bowls and spoons. 65/55 mm head diameters with 2+2T and 3+3T tooth configurations as supplied.
Design and Construction
The PCD spiral round-bottom router bit family machines shaped recesses, including the pictured bowl and spoon applications. The chart lists 20 mm shank diameter with 65 mm (33 mm head height, 2+2T) and 55 mm (28 mm head height, 3+3T) head configurations as supplied; the cutting material is PCD.
How It Works
The ball-nose head sweeps the recess in CNC passes: the spiral diamond teeth shear the curved bottom and walls while the 20 mm shank matches the tool holder. The pictured bowl and spoon show the typical finished applications of this head family.
Applications
- Shaped recesses (bowls, spoons)
- 3D CNC surface machining
- Round-bottom cavity work
- CNC router production runs
Suitable Materials
- Hardwood blanks
- Selected softwoods
- Wood-based bowl and spoon stock
- Selected tool-handle materials

Material Comparison: Tungsten Carbide vs. PCD (Diamond)
This tool is a PCD (polycrystalline diamond) cutter. Tungsten carbide is the conventional alternative. Typical industry data:
| Property | Tungsten Carbide Cutter | PCD (Diamond) Cutter (This Tool) |
|---|---|---|
| Hardness | 1,500-2,000 HV | 7,000-9,000 HV |
| Best suited for | General profiling across mixed materials | Highly abrasive boards and long production runs |
| Tool life vs. carbide baseline | 1x (baseline) | 10-15x on abrasive panels (typical industry data) |
| Edge wear on MDF/particleboard | Wear visible within shorter runs | Minimal wear over extended runs |
| Toughness | Higher toughness; tolerates impacts better | Lower toughness; sensitive to impact and metal contamination |
| Regrinding | Can be reground | Not reground in the normal case |
| Initial cost | Lower | Higher |
| Cost per part at long runs | Usually higher | Usually lower on abrasive, long-run work |
| Typical choice | Short runs and mixed materials | This tool: long-run profiling on abrasive boards |
Typical industry data; actual tool life varies with workpiece, machine and feeds.
Delivery Scope
- 1 x PCD Spiral Round-Bottom Router Bit (configuration per chart)
- Individual box packaging
Why Choose VPOINT
- One-year warranty on manufacturing defects
- Custom and non-standard geometries supported against drawings
- Regrinding service available for carbide components
- Factory-direct since 2008, ISO 9001 certified
- Manufacturing in Sichuan and Dongguan, China
Precision & Quality Control
Each cutter is inspected against the specification sheet before packing: bore and diameter tolerances, cutting geometry and balance are checked under the ISO 9001 quality system, with batch traceability on every order.
Specifications
+The source specification lists the following confirmed configurations:
| Shank diameter (mm) | Head diameter (mm) | Head height (mm) | Tooth configuration as supplied |
|---|---|---|---|
| 20 | 65 | 33 | 2+2T |
| 20 | 55 | 28 | 3+3T |
+Cutting material: PCD (diamond), as listed in the source chart.
Frequently Asked Questions
Which configurations are listed?
+The chart lists a 20 mm shank with a 65 mm head (33 mm height, 2+2T) and a 55 mm head (28 mm height, 3+3T).
What is this bit used for?
+Shaped recesses such as the pictured bowls and spoons, machined on CNC routers.
Which shank does it use?
+A 20 mm shank as listed; confirm the collet size against your CNC tool holder before ordering.
What should I provide before ordering?
+Send the required recess shape, workpiece material and CNC machine details.
+Key words: pcd cutter, diamond cutter woodworking, pcd profiling cutter, diamond tip router bit

