4-1/2" x 7/8" T27 Curved Zirconia Flap Discs for Fillet Welds - 1 Piece

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Product Specification

4-1/2" X 7/8" T27 CURVED ZIRCONIA FLAP DISC FOR FILLET WELDS - 1 PIECE

Built specifically for welds and corners that standard flat-face flap discs struggle to reach, this 4-1/2" curved zirconia flap disc combines aggressive grinding performance with a purpose-designed curved edge. The zirconia grain continually exposes fresh cutting edges as the flaps wear, helping maintain strong cutting performance during demanding weld cleanup, blending, and fabrication work.

The curved flap geometry is the key advantage. It improves access into fillet welds, inside corners, and other recessed areas where a conventional T27 or T29 profile cannot maintain effective abrasive contact. This allows the operator to grind, blend, and refine the weld area with better access and control using one purpose-built disc.

The disc retains a T27-style flat face for broader contact while adding curved abrasive edges for detailed weld work. Combined with durable zirconia grain, X-weight polycotton cloth backing, and overlapping flap construction, it is a versatile option for fabrication shops, welders, and maintenance teams working on complex assemblies and joint geometry.

Quantity: 1 Piece

Product Specifications

Product Features

• Curved abrasive edges improve access to fillet welds and inside corners
• Purpose-built geometry reaches recessed weld areas more effectively than standard flat flap discs
• Zirconia grain continually exposes fresh cutting edges as the disc wears
• T27-style face provides control for surrounding surface blending
• Overlapping flap construction combines grinding, blending, and refinement
• X-weight polycotton cloth backing provides strong abrasive support
• Available from aggressive 36 grit through finer 120 grit
• Designed for weld cleanup, fabrication, and detailed grinding applications

Materials & Applications

Best For:

• Carbon steel
• Structural steel
• Stainless steel
• Cast iron

Additional Materials:

• Titanium
• Nickel
• Wrought iron
• Copper
• Fiberglass
• Plastic
• Hard rubber
• Wood
• Stone

Common Applications:

• Fillet weld grinding
• Inside-corner grinding
• Weld cleanup and blending
• Grinding recessed joint areas
• Deburring
• Edge cleanup
• Surface preparation
• General fabrication and repair work

Machine Compatibility

Designed for compatible 4-1/2" to 5" angle grinders using a 7/8" mounting system.

For a Benchmark option, use the Benchmark Abrasives 4-1/2" corded angle grinder, which supports compatible 7/8" bore accessories.

Always verify that the grinder is approved for the disc diameter and mounting style, that the proper guard and mounting hardware are installed, and that the grinder's operating speed does not exceed the flap disc's 13,300 RPM maximum.

Safety Tips

• Inspect the flap disc before use and do not use a damaged disc.
• Never exceed the maximum rated speed of 13,300 RPM.
• Use the proper grinder guard and compatible mounting hardware.
• Do not force the curved edge into a joint or corner; allow the abrasive to work with controlled pressure.
• Wear appropriate eye, hearing, respiratory, and hand protection.
• Secure the workpiece and maintain control of the grinder throughout use.
• Use only on grinders approved for the disc diameter and mounting configuration.
• Dry use only.