Tru-maxx 66254442913 Flap Disc 40 Grit 4 in Type 27

Product Description

The TRU-MAXX 66254442913 is a Type 27 coated flap disc designed for aggressive material removal on steel and stainless steel surfaces. Built around a poly-cotton backing, the disc carries zirconia alumina abrasive flaps rated at a coarse 40 grit. At 4 inches in diameter with a 5/8 inch arbor hole, it mounts directly to standard angle grinders. The maximum operating speed is 15,300 RPM. This disc is suited for weld blending, surface prep, and deburring work where a flat grinding profile is needed. It weighs 0.165 pounds, making it a lightweight option for repetitive or overhead passes.

The 66254442913 is intended for use in fabrication shops, maintenance facilities, and field metalwork applications. Its Type 27 depressed-center profile keeps the disc flat against the workpiece, which is preferred for flush grinding and weld seam blending on flat or slightly contoured steel and stainless steel. The 40 grit coarse grade removes material quickly and is a common choice for initial stock removal before stepping to a finer finish grit. Metalworkers, pipefitters, and general fabricators are the primary installers of this disc.

Key Features

• Zirconia alumina abrasive for fast cut rate and extended disc life on steel and stainless steel
• Type 27 flat profile for flush grinding, weld blending, and surface preparation
• 40 grit coarse grade suited for aggressive stock removal
• Poly-cotton backing provides flexibility and durability during use
• Maximum speed of 15,300 RPM rated for standard 4 inch angle grinders
• 5/8 inch arbor hole fits common angle grinder spindles

Compatibility

Designed for use with 4 inch angle grinders equipped with a 5/8 inch arbor spindle. Rated for material applications on steels and stainless steel per the GP-Z series designation.

Installation Notes

Installation is performed by metalworkers and fabricators using a compatible angle grinder. Confirm the grinder spindle speed does not exceed the 15,300 RPM disc rating before mounting. Inspect the disc for damage before each use and discard any disc that shows cracking, fraying, or delamination. Always use appropriate eye protection and follow ANSI B7.1 safety guidelines when operating grinding discs.