Weiler 50825 Type 27 Flap Disc 80 Grit 7 Inch

Product Description

The WEILER 50825 is a Type 27 high-density flap disc engineered for grinding and blending on steel and stainless steel surfaces. It carries an 80-grit zirconia alumina abrasive — a medium-grade material that cuts aggressively while holding up under heat and pressure. The phenolic backing provides rigid support, keeping the disc stable at speeds up to 8,600 RPM. The arbor hole measures 7/8 inches, fitting standard angle grinder spindles. Part of the Tiger Big Cat HD series, this disc is built for demanding fabrication and weld prep work where consistent stock removal and disc longevity matter.

This flap disc is suited for metalworking applications in fabrication shops, structural steel work, and field welding environments. Its Type 27 flat profile is the right choice for surface grinding and blending on flat or slightly contoured workpieces. The zirconia alumina abrasive performs well on carbon steel and stainless steel, making it a practical option for both production grinding and finishing passes. Licensed tradespeople and fabricators working to AWS or shop-floor weld prep standards will find this disc fits standard 7-inch angle grinders.

Key Features

• Type 27 flat profile for surface grinding and weld blending
• 80-grit zirconia alumina abrasive — medium grade, aggressive cut with good disc life
• Phenolic backing for rigid support and stability at high RPM
• Rated to 8,600 RPM maximum operating speed
• High-density flap construction (Tiger Big Cat HD series) for extended service life
• Fits standard 7/8-inch arbor hole angle grinders

Compatibility

Designed for use on steels and stainless steel. Fits 7-inch angle grinders with a 7/8-inch arbor spindle. Verify that the grinder's no-load RPM does not exceed the 8,600 RPM disc rating before mounting.

Installation Notes

Installation should be performed by a qualified operator familiar with angle grinder safety per ANSI B7.1 guidelines. Inspect the disc for cracks or damage before mounting — never use a damaged disc. Ensure the grinder guard is in place and that the tool is powered off and unplugged before changing discs. Do not exceed the maximum RPM rating marked on the disc.