Design and Construction — a VPOINT cone-shape carbide burr for chamfer cleanup and taper work, sized for steel / stainless welds and similar work. YG8 carbide at HRA 89–91; die-grinder reference speeds are in the performance table below, with the flute-style guidance in the FAQ. ISO 9001 production, batch-verified, custom sizes from drawings.

Design and Construction

Long-shank cone heads in the green-holder line: extended reach plus high-hardness carbide (HRC 90-class equivalent, cutting 50-65 HRC steels). The green holders mark the high-hardness family.

How It Works

The cone concentrates cut at the point for hard steels; the long shank reaches features other heads cannot, at reduced speed per overhang.

Applications

Hardened steel repair, deep-feature dressing, mould work, maintenance with reach.

Field Cases

• Mould shop: 52 HRC cores dressed at depth with the long green cones.
• Maintenance: a deep feature reached without extension chucks.
• Tool room: hardened fixture edges re-cut to line.

Performance Data

Suitable Materials

Hardened steels 45-65 HRC, tool steels.

Material Comparison: Cutting by Workpiece Hardness: HRC45 vs 55 vs 65

What the hardness ladder demands – typical industry data:

Delivery Scope

Bit in green holder; lengths per order.

Why Choose VPOINT

Reach and hardness – two constraints, one head.

Precision & Quality Control

Hardness verified per batch; runout checked at the nose.

Specifications

Hardness information:

Frequently Asked Questions

Which cone angle for a countersink cleanup?

＋Match the burr angle to the countersink: 90° for standard screw seats, 60° for narrower chamfers, 30° for gentle tapers — one-pass edge breaks on cast iron and steel.

Cone or inverted cone?

＋Standard cone widens toward the tip for chamfer work; the inverted cone widens toward the shank and reaches into angled pockets.

Which cut style on cast iron?

＋Double-cut clears the abrasive chips fast; single-cut leaves a smoother finish on the tapered wall.

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