CGW 31172 4-1/2" X 5/8"-11 Type 27 40-Grit ZS Zirconia Flap Disc

The CGW 31172 flap disc combines a 4-1/2 inch diameter with a 5/8-11 inch threaded arbor to fit common right-angle grinder spindles. It features a Type 27 recessed configuration designed to run flush against angled surfaces, enabling efficient material removal on contoured workpieces. The disc uses a premium blend of zirconia and aluminum oxide grains with a grinding aid, which helps manage heat generation and maintain material removal rates during grinding. Zirconia blends are known for their durability and ability to stay sharp under heavy use, making this disc a practical choice for stainless steel and other alloys where heat buildup can affect finish and tool life. This particular configuration is geared toward heat-sensitive applications, where controlled grinding action helps minimize warping or discoloration while achieving a consistent surface finish.

Construction-wise, the disc is built with a 40-grit zirconia grain mix, selected to balance rate of material removal with a smoother finish. The Type 27 profile provides a flatter disc contact for efficient edge and face grinding, while the 13300 RPM operating speed aligns with typical high-speed grinders used in metal fabrication and maintenance tasks. The packaging indicates a box quantity of 10 discs per shipment, with each disc sold individually, offering flexibility for maintenance planning and stocking.

In practice, this flap disc is suitable for deburring, shaping, and finishing on metal components where stainless steel work and heat sensitivity are considerations. It’s compatible with standard 4.5 inch abrasive wheels and common 5/8-11 hubs, enabling straightforward replacement in existing tooling setups. When selecting this disc, verify your grinder’s RPM and ensure it does not exceed the disc’s maximum operating speed to avoid unsafe conditions. Ordering the 10-pack helps ensure you have ready access to replacement discs for ongoing fabrication or maintenance projects.

Features:

• Premium blend of zirconia & aluminum oxide grains with grinding aid
• Optimized for stainless steel applications
• Suitable for heat-sensitive materials
• Type 27 profile for versatile grinding angles
• 4-1/2" diameter with 5/8-11" arbor/shank
• 40-grit for balanced material removal and finish
• 10 discs per box