The Benchmark Abrasives 1/8" Shaft 17 Piece Double Cut Burr Master Set is built for fabricators, machinists, welders, and metalworkers who want a versatile collection of professional-grade carbide burr shapes for detailed deburring, shaping, contouring, and material removal. Each burr features a solid carbide head with a silver-brazed connection to the shank, providing strong, stable construction for demanding rotary-tool applications.
The assortment combines cylinder, end-cut cylinder, radius-end cylinder, ball, oval, tree, pointed-tree, flame, taper-radius, and pointed-cone geometries so users can match the burr shape to the feature being worked. Double-cut tooth geometry uses intersecting cutting flutes to divide removed material into smaller chips, providing controlled stock removal and a smoother working action than a comparable single-cut burr while remaining aggressive enough for fabrication and maintenance work.
All 17 burrs use a 1/8" shank for compatible rotary tools and precision grinders. The assortment includes both 1/8" and 1/4" head diameters, giving users smaller profiles for tight access and larger profiles for broader cutting contact. A storage case is included to keep the complete assortment organized and protected between jobs.
Applications
The 17-piece assortment provides shape options for:
- Sidewall and straight-edge shaping
- Shoulder and flat-bottom work
- Rounded internal transitions
- Concave surfaces and cavities
- Sweeping curved contours
- Edge rounding
- Narrow and angled features
- Channel shaping
- Tapered contours and transitions
- Pointed recesses
- Detailed deburring
- Weld cleanup
- Localized stock removal
- General fabrication and maintenance work
Materials
Recommended primarily for:
- Steel
- Stainless steel
- Cast iron
Also suitable for additional materials when the correct operating speed and technique are used, including titanium, nickel, wrought iron, copper, fiberglass, plastic, hard rubber, wood, and stone.
Machine Compatibility
Designed for rotary tools, precision grinders, and other compatible machines equipped with a properly sized 1/8" collet or chuck.
Compatible examples include Dremel® 4300, 4000, and 3000 fitted with a Dremel 480 1/8" collet and matching collet nut. The 4300 can also hold the 1/8" shank in its keyless chuck.
Always confirm the 1/8" shank is securely seated in the correct collet or chuck before operation. A 1/8" shank is not interchangeable with 3 mm tooling.
Cutting Performance
The strength of this master set is its range of cutting geometries. Cylinder profiles handle walls and straight contours, while the end-cut cylinder adds frontal cutting capability for shoulders and flat-bottom features. Radius-end cylinders blend rounded transitions, and ball and oval shapes follow concave, radiused, and sweeping curved surfaces.
Tree, pointed-tree, flame, taper-radius, and pointed-cone profiles expand the set into edge rounding, angled contours, channels, tapered features, narrow recesses, and concentrated detail work. Including both the SL-41 and longer-cutting SL-42 gives users two compact taper-radius options for different contour lengths.
The double-cut tooth pattern uses intersecting flutes to divide removed material into smaller chips, helping provide controlled stock removal and a smoother working action than a comparable single-cut burr. The combination of 1/8" and 1/4" head diameters further expands the set's versatility by providing both tight-access profiles and broader cutting surfaces.
Carbide burrs are primarily cutting and shaping tools; applications requiring a refined cosmetic finish should be followed with the appropriate abrasive finishing process.
Recommended Operating Speed, by Material
This assortment contains both 1/8" and 1/4" burr head diameters, so operating speed must be selected according to the individual burr being used.
For these standard-length burrs, do not exceed 90,000 RPM for 1/8" heads or 70,000 RPM for 1/4" heads. Always operate within the lower maximum speed of the individual burr, machine, collet, chuck, or accessory system.
Safety Tips
- Always wear appropriate eye, hearing, respiratory, and hand protection.
- Secure the workpiece before beginning operation.
- Confirm the 1/8" shank is properly seated and securely tightened in the correct collet or chuck.
- Select the burr shape and head diameter appropriate for the feature being worked.
- Use light, controlled pressure and allow the carbide cutting edges to remove the material.
- Keep the burr moving during cutting rather than holding it stationary against the workpiece.
- Use additional control with pointed, tapered, and end-cutting geometries.
- Avoid excessive force, which can increase heat, vibration, and premature cutting-edge wear.
- Select operating speed according to the individual burr head diameter, workpiece material, and machine requirements.
- Never exceed the applicable maximum RPM for the individual burr.
- Stop immediately if excessive vibration, chatter, unusual noise, or visible damage occurs.
- Do not use a damaged, chipped, bent, or improperly mounted carbide burr.
