What is a round nose cone burr used for?
The combination of tapered sides and a rounded cutting tip makes this a versatile shape for:
- Shaping angled and tapered surfaces
- Working inside tapered holes and openings
- Shaping concave and curved surfaces
- Creating and refining rounded internal corners
- Blending internal contours and radiused edges
- Gradually enlarging or refining openings
- Deburring holes and difficult-to-reach edges
- Smoothing welds and removing excess metal
The tapered profile allows different parts of the head to produce different cutting widths. The rounded end follows curved surfaces and produces a softer internal radius without creating the sharp internal corner associated with a pointed cone burr.
Compared with a round nose tree burr, the straighter taper of the cone is better suited to angled surfaces and tapered openings.
Double-cut flutes
The crossed double-cut flute pattern breaks removed material into smaller chips, providing controlled cutting and efficient stock removal. It is well suited to general shaping, levelling, deburring and cleaning up metal components.
Suitable materials
- Mild and hardened steels
- Stainless steel
- Cast iron and cast steel
- Nickel-based alloys
- Titanium and other hard metals
For aluminium, copper, brass and other softer non-ferrous metals, an open-fluted burr designed specifically for non-ferrous materials may resist clogging more effectively.
Will it fit my rotary tool?
This burr has a 2.35mm (3/32") shank. It can be used in Dremel and similar rotary tools fitted with a suitable 2.35mm collet or adjustable chuck. It is also compatible with many micromotors, pendant motors and flexible shaft systems that accept 2.35mm accessories.
If using a Dremel, an adjustable Dremel Multi-Chuck is usually the most convenient option.
How to use
- Secure the shank firmly and as deeply as practical inside the collet or chuck.
- Start the rotary tool before bringing the burr into contact with the workpiece.
- Use the narrower end for detailed work and the wider section for broader material removal.
- Use the rounded tip for shaping concave surfaces and blending curved internal contours.
- Use light, controlled movements and allow the flutes to cut.
- Do not force, lever or twist the burr sideways.
- Keep the burr moving to avoid excessive localised heat.
- Wear suitable eye protection.
Tungsten carbide is extremely hard but can be brittle. Excessive pressure, impacts, chatter or sideways leverage may damage the cutting head or shank.
