CGW 39422 4-1/2" X 7/8" Type 29 40-Grit A3 Aluminum Oxide Flap Disc

The CGW 39422 flap disc delivers efficient material removal and finishing on a variety of substrates, combining a 4-1/2 inch wheel diameter with a 7/8 inch arbor to fit compatible right-angle grinders. This Type 29 structure creates a convex edge that is well-suited for contour work, shaping welds, deburring, and blending on curved surfaces. The disc uses premium aluminum oxide grain on a polyester backing, designed to balance cut rate with long life under typical metalworking conditions.

The 40-grit designation provides a coarser finish appropriate for rapid material removal while still yielding a moderate surface quality. The disc is compatible with ferrous and nonferrous metals, as well as plastics and wood, depending on the application, offering versatility for mixed-material projects. With a rated RPM of 13,300, users should select a grinder that matches or exceeds this speed to maintain safe operation and avoid disc failure. Each package contains 10 discs, enabling batch use or stock replenishment for busy maintenance environments.

Practical use considerations include selecting the Type 29 flap arrangement for aggressive grinding on angled surfaces and weld seams. Operators should maintain proper PPE and follow grinder safety practices, including correct mounting, wheel speed checks, and avoiding pressure that could lead to back-off or wheel glazing. The part number CGW39422 should be used for ordering and inventory accuracy, and the 4.5 inch x 7/8 inch configuration should be verified against your grinder’s arbor compatibility and mounting flange. This product is categorized for facility maintenance applications where durable finishing tools are needed for metal and compatible substrates.

Features:

• Premium Aluminum Oxide grain on a polyester backing
• Type 29 flap disc geometry for versatile sanding angles
• 40 grit for material removal with a smoother finish
• 4-1/2" diameter and 7/8" arbor/shank size
• Suitable for ferrous and non-ferrous metals, plastics, and wood
• Maximum RPM approximately 13,300
• Package size: Each, Box Quantity: 10