Norton 77696090181 Flap Disc 40 Grit Zirconia Alumina Type 27

Product Description

The NORTON 77696090181 is a Type 27 coated flap disc engineered for aggressive material removal on metal fabrication and welding applications. It uses a zirconia alumina abrasive at 40 grit for coarse-grade cutting and grinding. The disc measures 3 inches in diameter and mounts via a Quick-Change Type S attachment, making tool-free changeovers fast on compatible angle grinders and die grinders. A fiberglass backing plate provides rigidity and heat resistance during extended use. Rated to 30,000 RPM, this disc is suited for metalworkers, fabricators, and pipefitters who need consistent stock removal on steel and stainless steel.

This flap disc is designed for use in metal fabrication shops, maintenance and repair operations, and field welding scenarios where weld grinding, deburring, and surface blending are routine tasks. The Type 27 flat profile is appropriate for flat and slightly contoured surfaces. The Quick-Change Type S mount is compatible with mandrels and backing pads that accept the S-lock system, commonly found on pneumatic and electric grinders used by trade professionals.

Key Features

• Zirconia alumina abrasive grain delivers durable, fast-cutting performance on ferrous metals
• 40 grit coarse grade for aggressive stock removal and weld blending
• Type 27 flat disc profile suited for surface and edge grinding on flat workpieces
• Quick-Change Type S attachment allows rapid disc swaps without additional tools
• Fiberglass backing provides structural rigidity and thermal stability under load
• 30,000 RPM maximum speed rating compatible with high-speed die grinders

Compatibility

Designed for use with angle grinders and die grinders fitted with a Quick-Change Type S mandrel or backing pad. Verify your grinder spindle accepts the Type S lock system before installation.

Installation Notes

Installation and disc changes should be performed with the grinder fully powered down and disconnected from its power source or air supply. Confirm the grinder free-speed RPM does not exceed the 30,000 RPM disc rating before use. Inspect the disc for cracks or damage before each use and discard any disc that shows visible defects. Always use appropriate eye protection and follow applicable ANSI B7.1 safety standards for abrasive disc use.