Product Specification
SC-3NF RADIUS END CYLINDER ALUMA CUT CARBIDE BURR — 1/4" SHANK
The Benchmark Abrasives SC-3NF Aluma Cut Cylinder Shape Radius End Premium Tungsten Carbide Burr is built for fabricators, machinists, welders, and metalworkers who need controlled material removal on aluminum and other soft nonferrous materials. 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 made for demanding deburring, shaping, contouring, and material-removal applications.
The SC-3NF combines that premium construction with a 3/8" cylinder profile, a radius end, and Aluma Cut tooth geometry. Its wider, more open tooth spacing provides chip clearance on aluminum and other soft nonferrous materials, helping reduce chip packing during cutting. The rounded end blends more smoothly through internal transitions and contoured areas than a flat-ended cylinder, while the straight sides remain useful for controlled wall and surface shaping.
Whether you're blending rounded internal transitions, deburring aluminum parts, refining contours, cleaning fabricated edges, or removing material through recessed features, the SC-3NF gives you a useful balance of straight-sided control and radius-end versatility. The 1/4" shank fits compatible die grinders and rotary tools with a matching collet, while the standard-length 3/8" head is rated for a maximum speed of 66,000 RPM.
Product Specifications
| Specification |
Details |
| Product Code |
SC-3NF |
| Burr Material |
Tungsten Carbide |
| Head Shape |
Cylinder, Radius End |
| Cut |
Aluma Cut |
| Head Diameter |
3/8" |
| Cut Length |
3/4" |
| Shank Diameter |
1/4" |
| Overall Length |
2-1/2" |
| Max RPM |
66,000 RPM |
| Quantity |
1 Piece |
Features
- Premium tungsten carbide construction
- Aluma Cut tooth geometry for improved chip clearance
- Open tooth spacing suited for aluminum and soft nonferrous materials
- Radius end for blending rounded internal transitions
- Straight-sided cylinder profile for controlled wall and surface shaping
- 3/8" head for medium-size contour work
- 3/4" cutting length for useful surface engagement
- Suitable for deburring, shaping, contouring, and localized stock removal
- 1/4" shank for compatible die grinders
- Sold individually
Applications
The SC-3NF cylinder radius-end profile is well suited for:
- Rounded internal transitions
- Contour blending
- Sidewall shaping
- Recess cleanup
- Deburring aluminum parts
- Cleaning fabricated edges
- Localized stock removal
- General nonferrous fabrication and maintenance work
Materials
The Aluma Cut tooth pattern is intended primarily for:
- Aluminum
- Other soft nonferrous materials
Its wider, more open tooth spacing is designed to provide chip clearance on softer materials where closely spaced cutting teeth can be more prone to loading.
Machine Compatibility
Designed for die grinders and other rotary tools equipped with a properly sized 1/4" collet.
Compatible examples include:
-
Benchmark Straight Pneumatic Die Grinder (BMT-DGST_1) — 1/4" collet, up to 25,000 RPM.
-
DEWALT DCG426B — 1/4" collet, variable speed up to 25,000 RPM.
-
Milwaukee 3485-20 — 1/4" collet, variable speed up to 20,000 RPM.
Always confirm the burr shank is securely seated in the correct collet and that the machine speed is appropriate for the burr diameter, workpiece material, and application.
Cutting Performance
The SC-3NF combines a straight-sided cylinder with a radius end, making it well suited for shaping walls while also blending smoothly through rounded internal transitions. Compared with a plain-end cylinder, the rounded end reduces the abrupt change at the tip and gives the burr more versatility through curved or recessed features.
Its Aluma Cut tooth pattern uses wider, more open spacing than a double-cut burr, providing additional room for chips to clear during cutting. This geometry is specifically useful on aluminum and other soft nonferrous materials where maintaining chip evacuation helps support a cleaner, more consistent cutting action.
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 aluminum row in the 3/8" chart as suggested starting guidance. Conventional die grinders commonly operate at 20,000–29,000 RPM; adjust within your machine’s range for smooth cutting. The other material rows are general burr references, not recommended operating speeds for every application.
Do not exceed the 66,000 RPM maximum speed for this standard-length 3/8" carbide burr. Always operate within the lower maximum speed of the burr, machine, collet, or accessory system.
Safety Tips
- Always wear appropriate eye, hearing, respiratory, and hand protection.
- Secure the workpiece before beginning operation.
- Confirm the 1/4" shank is properly seated and securely tightened in the correct collet.
- 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.
- 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 66,000 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.
