3M 7000000557 Quick-change Disc 120 Grit Ceramic 3 in

Product Description

The 3M 7000000557 is a coated abrasive quick-change disc designed for use with Roloc TR-style disc holders and compatible right-angle grinders and die grinders. Built on a polyester cloth backing with a ceramic abrasive grain, this 3-inch disc cuts at 120 grit for fine finishing and blending work on metal surfaces. The Type R attachment system allows fast single-motion disc changes without tools. Rated to 20,000 RPM, it handles the demands of sustained production grinding without losing cut rate. Part of the 777F series, it is intended for professional metalworking, fabrication, and surface prep applications.

This disc is used in metal fabrication shops, HVAC sheet metal work, welding cleanup, and general industrial surface preparation. The 120-grit ceramic grain is suited for blending weld seams, removing light scale, and final surface conditioning on ferrous and non-ferrous metals. The orange polyester cloth backing provides flexibility for contoured and flat surfaces alike. Each disc is sold individually, though a minimum order quantity of 50 units applies.

Key Features

• Ceramic abrasive grain for aggressive, consistent cut at fine 120 grit
• Polyester cloth backing with YF weight for durability and flexibility
• Type R (Roloc TR) quick-change attachment for fast, tool-free disc swaps
• 20,000 RPM maximum speed rating for use with standard die and right-angle grinders
• 3-inch diameter fits standard Roloc TR disc holders
• 777F series construction for consistent grain orientation and surface finish

Compatibility

Designed for use with Roloc TR-style quick-change disc holders and right-angle or die grinders that accept Type R attachments. No specific equipment model compatibility was provided in the product data.

Installation Notes

Installation requires a Roloc TR-compatible disc pad holder mounted on a suitable grinder rated at or below 20,000 RPM. Verify the grinder spindle speed does not exceed the disc rating before use. Wear appropriate eye, face, and hand protection per ANSI and shop safety standards. Inspect the disc for damage or delamination before each use and do not use damaged discs.