Arc Abrasives 31668 Surface Conditioning Disc 3 in 120 Grit

Product Description

The ARC ABRASIVES 31668 is a 3-inch surface conditioning disc rated at 120 grit and designed for use with Type R quick-change attachment systems. It features an extremely flexible backing combined with 100 percent cotton abrasive construction, which allows the disc to conform to workpiece contours without gouging or loading. The result is consistent surface finish work on flat and curved surfaces alike. Metalworking professionals and fabricators reach for this disc when edge grinding or finishing work on cold rolled mild steel and stainless steel sheet requires a controlled, repeatable cut.

This disc is suited for edge grinding and surface conditioning applications in light fabrication, sheet metal work, and welding cleanup environments. Its flexible construction makes it particularly effective on stainless steel sheet where rigid abrasives risk scratching or uneven stock removal. It is commonly used in production shops and field fabrication settings where quick disc changes and consistent grit performance are priorities. The Type R mount makes it compatible with standard quick-change right-angle die grinders and finishing tools.

Key Features

• Extremely flexible backing conforms to contours for consistent surface contact
• 100 percent cotton abrasive construction resists loading on stainless and mild steel
• 120 grit provides a fine finishing cut suitable for surface conditioning and edge work
• Type R quick-change mount enables fast disc swaps without tools
• 3-inch diameter fits standard quick-change right-angle die grinders

Compatibility

Designed for use with Type R quick-change right-angle die grinders and finishing tools. Suitable for surface conditioning and edge grinding on cold rolled mild steel and stainless steel sheet.

Installation Notes

Installation and disc changes should be performed with the grinder powered off and disconnected from its power source. Verify the spindle speed rating of the tool does not exceed the disc's maximum rated RPM before mounting. Follow applicable ANSI B11 and tool manufacturer guidelines for abrasive disc mounting and personal protective equipment. Inspect the disc for damage before each use and discard any disc that shows tears, delamination, or uneven wear.

Technical Specifications

• Disc Diameter: 3 inches
• Grit: 120
• Attachment Type: Type R Quick-Change
• Abrasive Material: 100 Percent Cotton
• Weight: 0.0176 pounds
• Unit of Measure: Each
• Minimum Order Quantity: 50

Standard Information

• Brand: ARC ABRASIVES
• Manufacturer Part Number: 31668