4-1/2" X 7/8" T29 Zirconia High Density Flap Disc - 1000 Pieces

• Product Specification
• Shipping
• Refund

Product Specification

4-1/2" X 7/8" T29 ZIRCONIA HIGH DENSITY FLAP DISC - 1000 PIECES

Built for high-volume fabrication shops, production environments, and heavy flap-disc users, these 4-1/2" x 7/8" T29 Zirconia High Density Flap Discs combine aggressive grinding performance with the extended working life of our Jumbo construction. Each disc uses self-sharpening zirconia grain and a dense layered-flap design that continually exposes fresh abrasive as the disc wears.

The High Density construction packs approximately 40% more abrasive material than our regular-density version, providing more usable grinding life when tackling welds, stock removal, edge work, and repeated fabrication jobs. The 15° T29 angled face keeps more abrasive engaged when working on flat surfaces and bead welds, making it an excellent choice for production grinding where speed, consistency, and disc life matter.

This bulk package contains 1,000 flap discs and is ideal for shops that want to reduce per-disc cost and keep frequently used abrasives in stock. Available in 40, 60, 80, and 120 grit. For mixed-grit bulk orders, contact us before ordering.

Product Specifications

Features

• High Density / Jumbo Construction: Approximately 40% more abrasive material than our regular-density flap discs for longer working life and fewer disc changes.
• Self-Sharpening Zirconia Grain: Continuously exposes fresh cutting edges as the abrasive wears, helping maintain an aggressive cut throughout the life of the disc.
• T29 Angled Profile: The 15° face increases abrasive contact on flat surfaces and bead welds for efficient grinding and blending.
• Heavy-Duty Cloth Backing: X-weight polycotton backing supports the abrasive flaps during demanding grinding and fabrication applications.
• Grinding and Finishing in One Disc: Removes material aggressively while leaving a more controlled finish than a conventional grinding wheel.
• Reduced Disc Changes: The increased abrasive volume makes High Density discs well suited for extended production runs and high-consumption shop environments.
• Multiple Grit Options: Available in 40, 60, 80, and 120 grit for applications ranging from aggressive stock removal to finer blending and surface refinement.
• Bulk Shop Packaging: 1,000-piece quantity is designed for fabrication shops, maintenance departments, manufacturers, and other operations with consistent flap-disc usage.

Applications & Performance

The self-sharpening zirconia abrasive continuously exposes fresh cutting edges as the disc wears, helping maintain an aggressive cut under the heat and pressure generated during metal grinding.

The High Density / Jumbo flap configuration provides substantially more abrasive material than a standard-density flap disc, extending working life for shops that regularly grind, blend, and finish metal.

The T29 angled face is designed for efficient abrasive contact on flat surfaces and bead welds. It is well suited for:

• Heavy stock removal
• Bead-weld grinding
• Weld cleanup and blending
• Flat-surface grinding
• Edge shaping
• Deburring
• Rust and scale removal
• Surface preparation
• General fabrication and maintenance

Suitable materials include steel, stainless steel, cast iron, titanium, nickel alloys, wrought iron, copper, fiberglass, plastic, hard rubber, wood, and stone.

For contoured or irregular surfaces where a flatter disc profile provides better control, use a T27 flap disc.

Machine Compatibility

Designed for compatible 4-1/2" angle grinders that accept a 7/8" arbor.

Compatible examples include:

• Benchmark Abrasives BMT-AGBC4570 4-1/2" Angle Grinder (11,000 RPM)
• Makita® 9557PB / 9557PBX1
• DEWALT® DWE402
• Bosch® GWS10-45 (11,500 RPM)
• Metabo® WEPBA 17-125 Quick RT DS (10,000 RPM, North American version)

Use the proper grinding guard and approved flap-disc mounting hardware. Verify disc diameter, arbor hole, maximum no-load speed, flange setup, and guard configuration before operation.

Safety Tips

• Never exceed the maximum rated speed of 13,300 RPM.
• Inspect the flap disc before each use and do not use discs that are cracked, damaged, excessively worn, or otherwise compromised.
• Confirm the disc is properly seated and secured before starting the grinder.
• Keep the grinder guard installed and correctly positioned.
• Allow the grinder to reach operating speed before contacting the workpiece.
• Use controlled pressure and allow the zirconia abrasive to perform the cutting rather than forcing the disc into the workpiece.
• Use only for dry grinding applications.
• Always wear appropriate PPE, including safety glasses or a face shield, hearing protection, respiratory protection when required, gloves, and other protection appropriate for the application.
• Secure the workpiece before grinding and keep bystanders away from the work area.