The Benchmark Abrasives SG-51 Pointed Tree Shape Premium Tungsten Carbide Burr is built for fabricators, machinists, welders, and metalworkers who need controlled cutting performance in angled contours, narrow features, recessed areas, and detailed shaping work. Unlike lower quality burrs that may use hollow heads or inconsistent brazing, Benchmark carbide burrs feature a solid carbide head with a silver-brazed connection to the shank. The result is a strong, stable cutting tool designed for demanding deburring, shaping, contouring, and localized material-removal applications.
The SG-51 combines that premium construction with a 1/4" pointed-tree head and double-cut tooth pattern for efficient, controlled stock removal. Its tapered body narrows toward a pointed end, allowing the burr to work progressively into angled contours, narrow recesses, confined transitions, and detailed features where a rounded or broader profile would limit access.
Its 1/8" shank makes the SG-51 well suited for compatible rotary tools and precision grinders equipped with the correct 1/8" collet or chuck. The standard-length 1/4" head is rated for a maximum speed of 70,000 RPM, providing broader cutting coverage than the smaller SG-42 while retaining the pointed geometry needed for detailed access.
Features
- Premium tungsten carbide construction
- Double-cut design for efficient, controlled stock removal
- 1/4" pointed-tree head for detailed contouring
- Tapered profile for angled contours and narrow features
- Pointed end for increased access into confined areas
- Produces smaller chips than a comparable single-cut burr
- 1/8" shank for compatible rotary tools and precision grinders
- Suitable for deburring, shaping, contouring, and localized material removal
- Sold individually
Applications
The SG-51 pointed-tree profile is well suited for:
- Angled contours
- Narrow features
- Tight recesses
- Confined transitions
- Detailed internal shaping
- Edge and contour refinement
- 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 SG-51 pointed-tree shape combines a tapered body with a narrow pointed end, creating a progressive cutting profile that is especially useful for angled contours, narrow recesses, confined features, and detailed transitions. As the burr narrows toward the tip, the operator can use different areas of the head to vary the cutting contact and work into tighter geometry.
The pointed end distinguishes the SG profile from a radius-end tree burr. Where a radius-end tree favors rounded contours and edge blending, the SG-51 provides more concentrated access for narrow and angled features. The double-cut tooth pattern divides removed material into smaller chips for controlled stock removal and a smoother working action than a comparable single-cut burr.
Compared with the smaller SG-42, the 1/4" head provides broader cutting contact while preserving the same pointed-tree geometry for detailed access.
Carbide burrs are primarily cutting and shaping tools; applications requiring a refined cosmetic finish should be followed with the appropriate abrasive finishing process.
Use the chart above to select the recommended operating-speed range based on the 1/4" burr head diameter and workpiece material.
Do not exceed the 70,000 RPM maximum speed for this standard-length 1/4" carbide burr. Always operate within the lower maximum speed of the 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.
- 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 extra control when working with the pointed end in narrow or confined features.
- Avoid excessive force, which can increase heat, vibration, and premature cutting-edge wear.
- Select operating speed according to burr diameter, workpiece material, machine requirements, and the recommended operating-speed chart.
- Never exceed 70,000 RPM.
- Stop immediately if excessive vibration, chatter, unusual noise, or visible damage occurs.
- Do not use a damaged, chipped, bent, or improperly mounted carbide burr.
