Product Specification
SB-51NF CYLINDER SHAPE END CUT ALUMA CUT CARBIDE BURR – 1/8" SHANK
The Benchmark Abrasives SB-51NF cylinder shape end cut premium tungsten carbide burr is built for fabricators, machinists, metalworkers, and detail-oriented users who need precise 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 designed for controlled deburring, shaping, contouring, and localized material removal.
The SB-51NF combines that premium construction with a compact 1/4" cylinder head, an end-cutting face, 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. Unlike a plain-end cylinder, the SB profile can cut from both the sides and the end, making it especially useful for sidewalls, shoulders, flat-bottom features, and confined areas where frontal cutting is needed.
Its 1/8" shank makes the SB-51NF well suited for compatible rotary tools and precision grinders equipped with the correct 1/8" collet or chuck. The compact 1/4" head provides excellent access for detailed work, while the standard-length burr is rated for a maximum speed of 70,000 RPM.
Product Specifications
| Specification |
Details |
| Product Code |
SB-51NF |
| Burr Material |
Tungsten Carbide |
| Head Shape |
Cylinder with End Cut |
| Cut |
Aluma Cut |
| Head Diameter |
1/4" |
| Cut Length |
3/16" |
| Shank Diameter |
1/8" |
| Overall Length |
2" |
| Max RPM |
70,000 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
- End-cutting face for shoulders and flat-bottom features
- Compact 1/4" cylinder head for detailed work
- Straight-sided profile for controlled wall and contour shaping
- 1/8" shank for compatible rotary tools and precision grinders
- Suitable for deburring, shaping, contouring, and localized stock removal
- Sold individually
Applications
The SB-51NF cylinder end-cut profile is well suited for:
- Sidewall contouring
- Shoulder cleanup
- Flat-bottom contour work
- Deburring aluminum components
- Cleaning fabricated edges
- Detailed internal shaping
- Localized frontal cutting
- Confined-area material 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 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 SB-51NF combines a straight-sided cylinder with an end-cutting face, giving it greater versatility than a plain-end cylinder. The side flutes are useful for straight walls and consistent contours, while the cutting face allows controlled material removal into shoulders, flat-bottom features, and localized recesses.
Its compact 1/4" head is particularly useful for detailed work and confined features where larger burrs would limit access. The Aluma Cut tooth pattern uses wider, more open spacing than a double-cut pattern, providing additional room for chips to clear during cutting on aluminum and other soft nonferrous materials.
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
-
- 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.
- Use extra control when engaging the end-cutting face.
- 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 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.
