Tru-maxx 66254443397 Flap Disc 80 Grit 4.5 in Type 27

Product Description

The TRU-MAXX 66254443397 is a Type 27 zirconia alumina flap disc designed for grinding and blending on steel and stainless steel surfaces. It measures 4.5 inches in diameter with a 5/8-11 threaded arbor hole for direct attachment to standard angle grinders. Rated at 13,300 RPM, this medium-grade, 80-grit disc uses a poly-cotton backing that flexes against workpiece contours while maintaining consistent cut rate. The zirconia alumina abrasive self-sharpens under pressure, extending disc life on ferrous and stainless applications. Metal fabricators, welders, and maintenance technicians reach for this disc when blending welds, removing scale, or preparing surfaces for coating.

This disc fits the GP-Z series lineup and is built for use on carbon steels and stainless steel in both shop and field environments. Its Type 27 flat profile is suited for flat and moderate-contour surface work where low-angle grinding is required. The 5/8-11 threaded arbor hole attaches directly to most 4.5-inch angle grinders without an adapter. Typical applications include weld blending, rust removal, surface prep, and deburring on fabricated metal components in manufacturing, construction, and maintenance settings.

Key Features

• 80-grit medium grade for aggressive stock removal with a refined finish
• Zirconia alumina abrasive self-sharpens for extended service life on hard metals
• Type 27 flat profile optimized for flat and low-angle surface grinding
• 5/8-11 threaded arbor hole fits standard angle grinders without an adapter
• Poly-cotton backing provides flex and durability across uneven surfaces
• Rated to 13,300 RPM for use with 4.5-inch angle grinders

Compatibility

Designed for use on steels and stainless steel. Fits standard 4.5-inch angle grinders equipped with a 5/8-11 threaded spindle.

Installation Notes

Installation is performed by metal fabricators, welders, or maintenance technicians using a standard 4.5-inch angle grinder. Ensure the grinder is unplugged or the battery removed before mounting or removing the disc. Verify the grinder spindle speed does not exceed the 13,300 RPM disc rating before operation. Always use the appropriate guard and personal protective equipment per tool manufacturer requirements and applicable ANSI safety standards.