Norton 77696090174 Flap Disc 120 Grit Type 27 3 Inch

Product Description

The NORTON 77696090174 is a Type 27 zirconia alumina flap disc rated for grinding and finishing on metal and other hard surfaces. Running at up to 30,000 RPM, this 3-inch disc uses a Quick-Change Type R attachment for tool-free mounting on compatible right-angle grinders. The zirconia alumina abrasive delivers aggressive stock removal with extended disc life compared to standard aluminum oxide. At 120 grit fine grade, it suits finishing passes where a smooth surface is needed after rough grinding or weld cleanup. The fiberglass backing resists flex fatigue under load and keeps the disc stable at high RPMs.

This disc is suited for metalworking trades including fabricators, pipefitters, and maintenance mechanics working on weld seams, surface scale, and edge prep. The Type 27 flat profile allows flat-surface and slight-angle grinding. The Quick-Change Type R hub makes it practical for repetitive disc swaps in production environments or field service work where downtime matters. It ships and is sold individually, with a minimum order quantity of 10 units.

Key Features

• Zirconia alumina abrasive for long disc life and consistent cut rate
• 120 grit fine grade for finishing and light material removal
• Type 27 flat profile for flat-surface and low-angle grinding
• Quick-Change Type R attachment for tool-free disc changes
• Fiberglass backing for rigidity and stability at high RPM
• 30,000 RPM maximum speed rating

Compatibility

Designed for use with right-angle grinders fitted with a Quick-Change Type R hub adapter. Confirm your grinder accepts Type R quick-change accessories before installation.

Installation Notes

This disc is installed and serviced by metalworking tradespeople and grinding equipment operators. Always verify the grinder's rated RPM meets or exceeds the disc's 30,000 RPM maximum before mounting. Power down and disconnect the grinder from the power source before changing discs. Wear appropriate PPE including a face shield and grinding gloves during operation.