The Benchmark Abrasives SA-3 Cylinder Shape Premium Tungsten Carbide Burr is built for fabricators, machinists, welders, and metalworkers who expect professional-grade cutting performance and dependable construction. 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 SA-3 combines that premium construction with a larger 3/8" straight-sided cylinder profile and double-cut tooth pattern for efficient, controlled stock removal. Its cylinder shape excels along sidewalls, straight edges, interior contours, and broad surfaces where maintaining a consistent profile matters. The intersecting double-cut flutes divide removed material into smaller chips, providing a more manageable cutting action and smoother result than a comparable single-cut burr while still removing material aggressively.
Whether you're cleaning up welds, deburring machined parts, shaping metal, enlarging or refining contours, or performing general fabrication and maintenance work, the SA-3 delivers the versatility carbide burrs are known for. Its 3/8" head provides greater cutting surface than smaller cylinder burrs, while the 1/4" shank fits compatible die grinders and rotary tools with a matching collet. This standard-length 3/8" head is rated for a maximum speed of 66,000 RPM.
Features
- Premium tungsten carbide construction
- Double-cut design for efficient, controlled stock removal
- 3/8" cylinder head for increased cutting surface
- Cylinder shape for sidewalls, straight edges, and interior contour work
- Produces smaller chips than comparable single-cut burrs
- Suitable for deburring, shaping, cleaning, and medium material removal
- 1/4" shank for compatible die grinders
- Sold individually
Applications
The SA-3 cylinder profile is well suited for:
- Deburring machined and fabricated parts
- Sidewall contouring
- Straight-edge shaping
- Interior contour work
- Side cutting and straight-wall contouring
- Surface cleanup
- Medium stock removal
- Weld cleanup
- 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 die grinders and other rotary tools equipped with a properly sized 1/4" collet.
Compatible examples include:
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Benchmark Straight Pneumatic Die Grinder (BMT-DGST_1) — 1/4" collet, up to 25,000 RPM.
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DEWALT DCG426B — 1/4" collet, variable speed up to 25,000 RPM.
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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 SA-3 cylinder shape provides a broad, straight cutting profile that works especially well for machining sidewalls, straight edges, flat areas, and consistent interior contours. The larger 3/8" head provides more cutting surface than smaller cylinder burrs, making it well suited for medium stock removal and larger-area contour work while still allowing controlled shaping.
The double-cut pattern divides removed material into smaller chips, providing more controlled stock removal and a smoother working feel than a comparable single-cut burr. 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 as a starting guide to operating speed based on the 3/8" burr head diameter and workpiece material. These are suggested cutting ranges, not minimum machine speeds; conventional die grinders commonly run at 20,000–29,000 RPM.
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.
- Avoid use on low-speed electric power drills; insufficient operating speed can contribute to poor cutting performance and chipping.
- Do not use a damaged, chipped, bent, or improperly mounted carbide burr.
