CGW 39432 4-1/2" X 5/8"-11 Type 29 40-Grit A3 Aluminum Oxide Flap Disc

The CGW 39432 flap disc is a 4-1/2 inch diameter, 5/8-11 arbor Type 29 disc designed for material removal and finishing on ferrous and nonferrous metals, as well as plastics and wood. It features premium aluminum oxide grain bonded to a polyester backing, providing consistent cut rates and durable performance across a range of applications. The 40-grit formulation is intended for aggressive grinding and shaping, making it suitable for contouring edges and deburring where material removal is desired without a heavy finish. The Type 29 profile offers an angled, conical shape that can access recessed or contoured areas more readily than flatter discs, helping to achieve finer control in machining-like tasks.

The disc is rated for up to 13,300 RPM, which aligns with standard high-speed portable grinders used in metalworking and fabrication shops. This speed capability is an important consideration for maintaining effective grinding action and preventing glazing or grain dulling. Each package contains individual discs, with a box quantity of 10, making it practical for maintenance workflows and stocking within an MRO or facility-supply program. The combination of aluminum oxide grain and a sturdy polyester backing supports both aggressive material removal and a reasonable lifespan under typical shop conditions.

When selecting this disc, users should consider the workpiece material and desired finish, as well as access to tight corners or curved surfaces where Type 29 discs excel. Proper flanging, wheel hardness, and grinder compatibility should be checked to avoid over-stressing the tool and to maintain balanced operation. The 4-1/2 inch diameter and 5/8-11 arbor size are common in many compact grinders, but users should verify arbor compatibility on their specific tool prior to installation.

Features:

• Premium Aluminum Oxide grain on a polyester backing
• Type 29 configuration for versatility and contour finishing
• 4-1/2" diameter with 5/8"-11 arbor
• 40 grit for aggressive material removal and finish control
• Suitable for ferrous and non-ferrous metals, plastics, and wood
• High RPM capability for efficient grinding