Benchmark Abrasives 3" curved quick change ceramic flap discs combine high-performance ceramic grinding with a curved design built specifically for fillet welds, inside corners, tight radii, and other hard-to-reach areas. Manufactured with premium European ceramic cloth, the abrasive features a uniform particle size and premium blend of ingredients designed for demanding metalworking. On stainless steel, carbon steel alloys, and exotic metals, these ceramic flap discs can outperform comparable zirconia flap discs by up to 50%.
The extended curved flaps let you work with both the face and curved edge of the disc, so you can grind and blend flat areas, then reach directly into weld seams, slag, inside corners, and radiused joints without switching abrasives. Self-sharpening ceramic grain continually exposes fresh cutting edges as it wears, helping maintain aggressive material removal throughout the usable life of the disc while handling the heat and pressure of demanding grinding applications.
Produced on computer-controlled equipment and subjected to multiple quality and safety tests, these 3" discs are built for consistent performance from disc to disc. The larger diameter provides more working coverage than the 2" version while still giving you the control needed around welds, contours, and fabricated parts, and the Type R quick change attachment keeps abrasive changes fast as the job moves from heavy grinding into blending and surface preparation.
Overlapping flap construction maintains fresh abrasive contact as the disc wears
Built for heavy material removal on demanding metal applications
Computer-controlled manufacturing promotes consistent disc construction
Multiple quality and safety tests during production
3" diameter provides increased working coverage
Type R attachment allows fast abrasive changes
Materials & Applications
Common Materials
Cast Iron
Carbon Steel
Stainless Steel
Steel Alloys
Titanium
Nickel
Wrought Iron
Copper
Fiberglass
Plastic
Hard Rubber
Wood
Stone
Common Applications
Fillet weld grinding and finishing
Inside corner grinding
Weld seam cleanup
Slag removal
Weld blending
Heavy stock removal
Surface preparation
Deburring
Edge cleanup
Contour grinding
Blending around radiused joints
Grinding broader welds and fabricated areas
Choose the least aggressive grit that removes material efficiently, then move to finer grits as the job transitions from grinding into blending and surface refinement.
Machine Compatibility
Designed for rotary sanding and grinding tools using a matching 3" Type R backing pad.
Recommended Benchmark Abrasives Tools
Benchmark Abrasives Right Angle Pneumatic Quick Change Sander
Also suitable for properly matched die grinders, electric drills, hand-held pneumatic grinders, and other compatible rotary tools using the correct holder and speed rating.
Safety Tips
Inspect the disc and holder before each use
Fully secure the disc to the Type R holder before operating
Never exceed the maximum RPM of the lowest-rated component
Use dry only
Use only the face and curved abrasive edge as intended
Use a lighter touch or feathered approach when less stock removal is required
Follow the tool manufacturer's operating and safety instructions
Frequently Asked Questions
Use a matching 3" Type R holder. Compatible choices include the Benchmark Abrasives BMT-QC90 Right Angle and BMT-QCPG Pistol Grip Quick Change Sanders. Other verified examples include Milwaukee 2984-20 with a suitable 1/4" shank holder and Dynabrade 48530, 48531, or 48532 with the matching 51346 Type R pad. Always confirm the RPM rating of the complete assembly.
The curved abrasive edge lets you reach fillet welds, inside corners, radiused joints, and other areas that are difficult to grind effectively with a standard flat flap disc.
Yes. The flat face is used for conventional grinding and blending, while the curved abrasive edge is designed to work into weld seams, slag, inside corners, and curved joints.
Ceramic grain continually exposes fresh cutting edges as it wears, helping maintain an aggressive cut on stainless steel, carbon steel alloys, and exotic metals.
As the abrasive wears, fresh cutting edges are continually exposed rather than the grain simply becoming dull. This helps maintain aggressive cutting performance throughout the disc's usable life.
The 3" disc provides more abrasive surface and greater working coverage for broader welds and larger fabricated areas. The 2" version is generally better when tighter access and more localized control are the priority.
Choose the curved version when the job involves fillet welds, inside corners, tight radii, or contours. A standard mini flap disc is generally better when most of the work is performed with the face of the disc.
Use a matching 3" Type R quick change backing pad. The holder is sold separately.
No. These ceramic curved flap discs are intended for dry use only.
Available grits are 36, 40, 60, 80, and 120.
No. 25,000 RPM is the maximum rated speed. Never exceed the RPM rating of the lowest-rated component in the disc, holder, and tool assembly.
Benchmark Abrasives 3" curved quick change ceramic flap discs combine high-performance ceramic grinding with a curved design built specifically for fillet welds, inside corners, tight radii, and other hard-to-reach areas. Manufactured with premium European ceramic cloth, the abrasive features a uniform particle size and premium blend of ingredients designed for demanding metalworking. On stainless steel, carbon steel alloys, and exotic metals, these ceramic flap discs can outperform comparable zirconia flap discs by up to 50%.
The extended curved flaps let you work with both the face and curved edge of the disc, so you can grind and blend flat areas, then reach directly into weld seams, slag, inside corners, and radiused joints without switching abrasives. Self-sharpening ceramic grain continually exposes fresh cutting edges as it wears, helping maintain aggressive material removal throughout the usable life of the disc while handling the heat and pressure of demanding grinding applications.
Produced on computer-controlled equipment and subjected to multiple quality and safety tests, these 3" discs are built for consistent performance from disc to disc. The larger diameter provides more working coverage than the 2" version while still giving you the control needed around welds, contours, and fabricated parts, and the Type R quick change attachment keeps abrasive changes fast as the job moves from heavy grinding into blending and surface preparation.
Overlapping flap construction maintains fresh abrasive contact as the disc wears
Built for heavy material removal on demanding metal applications
Computer-controlled manufacturing promotes consistent disc construction
Multiple quality and safety tests during production
3" diameter provides increased working coverage
Type R attachment allows fast abrasive changes
Materials & Applications
Common Materials
Cast Iron
Carbon Steel
Stainless Steel
Steel Alloys
Titanium
Nickel
Wrought Iron
Copper
Fiberglass
Plastic
Hard Rubber
Wood
Stone
Common Applications
Fillet weld grinding and finishing
Inside corner grinding
Weld seam cleanup
Slag removal
Weld blending
Heavy stock removal
Surface preparation
Deburring
Edge cleanup
Contour grinding
Blending around radiused joints
Grinding broader welds and fabricated areas
Choose the least aggressive grit that removes material efficiently, then move to finer grits as the job transitions from grinding into blending and surface refinement.
Machine Compatibility
Designed for rotary sanding and grinding tools using a matching 3" Type R backing pad.
Recommended Benchmark Abrasives Tools
Benchmark Abrasives Right Angle Pneumatic Quick Change Sander
Also suitable for properly matched die grinders, electric drills, hand-held pneumatic grinders, and other compatible rotary tools using the correct holder and speed rating.
Safety Tips
Inspect the disc and holder before each use
Fully secure the disc to the Type R holder before operating
Never exceed the maximum RPM of the lowest-rated component
Use dry only
Use only the face and curved abrasive edge as intended
Use a lighter touch or feathered approach when less stock removal is required
Follow the tool manufacturer's operating and safety instructions
Frequently Asked Questions
Use a matching 3" Type R holder. Compatible choices include the Benchmark Abrasives BMT-QC90 Right Angle and BMT-QCPG Pistol Grip Quick Change Sanders. Other verified examples include Milwaukee 2984-20 with a suitable 1/4" shank holder and Dynabrade 48530, 48531, or 48532 with the matching 51346 Type R pad. Always confirm the RPM rating of the complete assembly.
The curved abrasive edge lets you reach fillet welds, inside corners, radiused joints, and other areas that are difficult to grind effectively with a standard flat flap disc.
Yes. The flat face is used for conventional grinding and blending, while the curved abrasive edge is designed to work into weld seams, slag, inside corners, and curved joints.
Ceramic grain continually exposes fresh cutting edges as it wears, helping maintain an aggressive cut on stainless steel, carbon steel alloys, and exotic metals.
As the abrasive wears, fresh cutting edges are continually exposed rather than the grain simply becoming dull. This helps maintain aggressive cutting performance throughout the disc's usable life.
The 3" disc provides more abrasive surface and greater working coverage for broader welds and larger fabricated areas. The 2" version is generally better when tighter access and more localized control are the priority.
Choose the curved version when the job involves fillet welds, inside corners, tight radii, or contours. A standard mini flap disc is generally better when most of the work is performed with the face of the disc.
Use a matching 3" Type R quick change backing pad. The holder is sold separately.
No. These ceramic curved flap discs are intended for dry use only.
Available grits are 36, 40, 60, 80, and 120.
No. 25,000 RPM is the maximum rated speed. Never exceed the RPM rating of the lowest-rated component in the disc, holder, and tool assembly.
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