Home » Product » 4-1/2 x 7/8 Type 29 Flap Disc Zirconia for Metal 120 Grit, 10/bx

4-1/2 x 7/8 Type 29 Flap Disc Zirconia for Metal 120 Grit, 10/bx


BoltCraft’s 4-1/2″ x 7/8″ Type 29 Flap Disc, featuring Zirconia abrasive for metal with a 120 grit, is engineered for fine finishing and polishing tasks in metalworking. This flap disc combines the efficiency of a grinding wheel with the finish of a sanding disc, providing versatility and durability for smoothing, blending, and finishing metal surfaces, packaged in a box of 10 for professional and industrial use.

SKU: 11FD45120-T29-B

$50 minimum order


  • The Type 29 Flap Disc by BoltCraft is designed with a conical shape and zirconia alumina abrasive, making it ideal for aggressive stock removal on metal surfaces with a smooth finish. The 120 grit is perfect for fine finishing applications, delivering a consistent and uniform surface preparation.

Applications & Advantages

  • Suitable for a wide range of metals, including stainless steel, aluminum, and ferrous metals, in applications such as welding preparation, deburring, and surface conditioning.
  • The zirconia alumina abrasive offers superior cutting performance and extended disc life compared to standard aluminum oxide discs, making it cost-effective for high-production environments.
  • The Type 29 (conical) design provides an optimal angle for contour and edge work, enhancing the disc’s versatility and ease of use.

Material & Specifications

  • Made with premium zirconia alumina grain bonded on sturdy polyester flaps, which wear away to expose fresh, sharp abrasive, maintaining high cutting efficiency throughout the disc’s life.
  • The 4-1/2″ diameter and 7/8″ arbor size fit standard angle grinders, making it accessible for various metalworking tasks.
  • The 120 grit is ideal for achieving a smooth finish, making it an excellent choice for final-stage fabrication and finishing touches.

Reliability & Performance

  • The flap disc design promotes cooler grinding, reducing the risk of discoloration and warping of the workpiece, ensuring the integrity of the metal.
  • Engineered for durability, the disc withstands the demands of heavy use while maintaining its form and function, providing consistent finishing results.

Testing & Compliance

  • Each flap disc is rigorously tested for balance, safety, and abrasive performance to ensure they meet BoltCraft’s high standards for quality and efficiency.
  • Complies with industry safety standards for abrasive discs, ensuring safe operation when used with appropriate personal protective equipment and practices.
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