Merit Abrasives 66623355602 Fiber Disc 4-1/2 in 36 Grit

Product Description

The MERIT ABRASIVES 66623355602 is a ceramic fiber disc designed for aggressive material removal on metal, weld seams, and other hard surfaces. It measures 4-1/2 inches in diameter with a 7/8 inch arbor hole for secure mounting on standard angle grinders and disc sanders. The ceramic abrasive grain operates at a Very Coarse 36 grit, making it well suited for rapid stock removal, deburring, and surface conditioning. A resinoid bond holds the grain to the fiber backing, maintaining cutting performance under heat and pressure. This disc is rated to 11,000 RPM and is identified by its red color coding.

This disc is used in fabrication shops, maintenance facilities, and field service applications where fast material removal is required. It fits standard 4-1/2 inch right-angle grinders equipped with a 7/8 inch arbor. Typical applications include weld grinding, edge preparation, rust removal, and scale removal on ferrous metals. The fiber backing provides rigidity and support against the workpiece, which helps maintain consistent contact and cut rate during use.

Key Features

• Ceramic abrasive grain for high cut rate and durability on hard metals
• 36 grit Very Coarse grade for aggressive stock removal
• 4-1/2 inch diameter with 7/8 inch arbor hole fits standard angle grinders
• 11,000 RPM maximum speed rating
• Resinoid bond secures grain to fiber backing under heat and load
• Red disc color for easy grit identification in the shop

Compatibility

Designed for use with 4-1/2 inch angle grinders and disc sanders fitted with a 7/8 inch arbor attachment.

Installation Notes

Installation should be performed by a qualified operator familiar with abrasive disc equipment. Verify the grinder or sander spindle speed does not exceed the 11,000 RPM disc rating before mounting. Inspect the disc for cracks or damage before each use and discard any disc that shows visible defects. Always use the appropriate guard and personal protective equipment as required by applicable safety standards.