How hard is the cutting material?

The carbide grade used in this diamond round bit delivers 7,000–9,000 HV / 1,500–2,000 HV hardness, which keeps the cutting edge sharp under continuous load.

Can you supply OEM or ODM parts, and how fast?

Yes. VPOINT TOOLS runs two factories in China (Chengdu and Dongguan) and accepts OEM and ODM orders. Standard samples and in-stock items ship within 24-48 hours; custom tooling is quoted per specification.

Which machines and materials is this diamond round bit used for?

It is used on CNC routers, table saws and spindle moulders for cutting particle board, MDF, plywood, solid wood and aluminium composite panels. Chipbreaker or replaceable-insert models are available for high-volume production runs.

Do you ship worldwide?

Yes. VPOINT TOOLS ships carbide and PCD woodworking tooling to more than 100 countries. Tell us the destination and application and we will confirm freight cost and lead time.

Diamond Round Bit

The company uses high-end production and testing equipment from Germany, selects international high-quality raw materials, and provides customers with professional supporting production tools and related accessories. The products include saw blades, forming knives, handle milling cutters, drill bits, and various diamond tools.

The VPOINT Diamond Round Bit is a carbide woodworking cutting tool for professional woodworking machines. Built for professional woodworking machines in daily production.

Product Description

The VP0020 diamond round-over bit covers edge rounding with cutting diameters from 13.76 to 50.8 mm on a 12.7 mm shank, in two-flute form with cutting lengths from 7 to 28 mm and corner radii from 2 to 25.4 mm, as listed in the specifications table.

Design and Construction

The VP0020 diamond round-over bit pairs a solid PCD cutting edge with a 40Cr chrome-molybdenum steel body. The profile runs the radius built into each part number, from 2 mm up to a full 25.4 mm half-round.

How It Works

The profile rounds the banded corner to the fixed radius, and the PCD edge keeps that radius in abrasive faced board across long production runs.

Applications

Edge rounding and V-grooving on CNC routers
Decorative profiles in panels
Cabinetry and furniture machining
Sign making

Suitable Materials

Melamine-faced particleboard
MDF and laminated boards
Veneered plywood
Solid wood

The PCD edge holds the profile through long runs in abrasive sheet goods.

Material Comparison: PCD vs. Tungsten Carbide

The figures below are typical industry data for production woodworking. PCD does not replace carbide in every job — carbide remains the right choice for low-volume general work — but on abrasive sheet goods the difference in blade life is decisive.

Property	PCD Diamond (This Blade)	Tungsten Carbide
Hardness	7,000–9,000 HV	1,500–2,000 HV
Tool life on MDF / particleboard / melamine	15–20× longer (500–1,200 h)	30–60 h (baseline)
Tool life on solid hardwood	10–13× longer (800–2,000 h)	80–150 h (baseline)
Tool life on abrasive boards (fibre cement / composites)	10–15× longer	baseline
Edge renewal	Limited regrinds — the economics come from 15–20× longer intervals between changes, not regrind count	4–6 regrinds at shorter intervals
Cut finish	Ra ≤ 0.2 μm achievable, stable over the blade life	Ra ~0.8 μm typical, degrades as teeth wear
Thermal conductivity	540–560 W/m·K — heat leaves the tooth tip fast	~80 W/m·K
Friction coefficient	≈ 0.05 — lower cutting forces and heat	≈ 0.3
Suited for	Abrasive engineered wood, laminates, composites, fibre cement, non-ferrous metals	General-purpose solid-wood work; the economic choice at lower volumes

Figures are typical published values; actual blade life depends on the workpiece material, feed rate, depth of cut, machine condition and maintenance schedule.

Delivery Scope

Single blade. Order by part number with the diameter, bore, width and tooth count stated in the specifications table below.

Why Choose VPOINT

One-year warranty on every blade — defects in material or workmanship are covered for 12 months from delivery.
Custom tooling — diameters, kerfs, bores and tooth counts built to your drawing or sample.
Non-standard fabrication — sizes outside the standard catalogue, including bore re-sizing and tooth-count changes.
Resharpening service — blades return to service after regrinding at a fraction of new-blade cost.
Factory-direct since 2008 — ISO 9001 manufacturing in Sichuan and Dongguan, China; 40Cr chrome-molybdenum steel bodies; no trading intermediaries.

Send a drawing, a sample or a worn blade, and our engineering team will quote the exact specification you need.

Precision & Quality Control

Every blade is inspected before shipment. Outside diameter, kerf thickness, plate thickness, bore diameter and tooth count are measured against the values listed in the specifications table, and tooth geometry (hook angle, bevel angle) is verified against the design drawing. Blades are stress-checked for runout and tension before packing.

Blades measuring outside tolerance do not ship. Inspection is performed under our ISO 9001 quality system, with batch records retained for traceability.

Specifications

Part No.	ØD	Ød	H	R	Z
VP002001	13.76	12.7	7	2	2
VP002002	13.76	12.7	7	2.38	2
VP002003	15.35	12.7	8	3.17	2
VP002004	20.94	12.7	9	3.97	2
VP002005	22.52	12.7	9	4.76	2
VP002006	23	12.7	10	5	2
VP002007	25.7	12.7	11	6.35	2
VP002008	28.92	12.7	12	7.96	2
VP002009	32.04	12.7	13.5	9.52	2
VP002010	35.2	12.7	16	11.1	2
VP002011	38.4	12.7	18	12.7	2
VP002012	41.58	12.7	20	14.29	2
VP002013	44.8	12.7	20	15.9	2
VP002014	47.92	12.7	22	17.46	2
VP002015	51.1	12.7	24	19.05	2
VP002016	54.28	12.7	25	20.64	2
VP002017	57.46	12.7	27	22.23	2
VP002018	60.62	12.7	28	23.81	2
VP002019	63.8	12.7	30	25.4	2
VP002020	66.96	12.7	31	26.98	2
VP002021	70.16	12.7	33	28.58	2
VP002022	73.32	12.7	35	30.16	2
VP002023	76.5	12.7	36	31.75	2
VP002024	79.66	12.7	38	33.33	2
VP002025	82.86	12.7	39	34.93	2
VP002026	86.02	12.7	41	36.51	2
VP002027	89.2	12.7	43	38.1	2

Frequently Asked Questions

What is the Diamond Round Bit used for?

The VP0020 diamond round-over bit pairs a solid PCD cutting edge with a 40Cr chrome-molybdenum steel body.

How do I choose the right size?

Refer to the specification table on this page: part numbers fix the cutting diameter, shank and cutting length. State the diameter, shank and cutting length you need when ordering.

Which materials does it suit?

Typical materials include Melamine-faced particleboard, MDF and laminated boards, Veneered plywood. Confirm the material grade and machining conditions for the specific tool before ordering.

Can I order a custom version?

Yes. Send the profile drawing or item code together with the workpiece material, machine model, cutting direction and quantity. Tools are produced to order, and each tool is packed in an individual plastic box.

Key words: diamond round over bit, PCD rounding router bit, edge rounding router bit, corner rounding PCD bit