Norton 66623340183 Quick-change Disc 4 in Ceramic Extra Coarse

Product Description

The NORTON 66623340183 is a quick-change abrasive disc designed for surface conditioning and material removal in fabrication, maintenance, and finishing applications. Built with a ceramic non-woven abrasive construction, it delivers consistent cut and surface finish across metal and composite substrates. The disc measures 4 inches in diameter, spins at a maximum rated speed of 8,000 RPM, and attaches via the Speed-Lok TR (Type R) quick-change system for fast, tool-free disc swaps. Rated Extra Coarse grade, this disc is suited for aggressive stock removal, weld blending, and surface prep work. It is a rigid disc configuration with an orange face and black center button. Typical installers and end users include metal fabricators, maintenance technicians, and industrial tradespeople.

This disc fits grinding and finishing applications in both shop and field environments. It is commonly used on angle grinders and die grinders equipped with a Type R quick-change backup pad. Typical tasks include weld seam blending, rust and scale removal, deburring, and pre-paint surface preparation on ferrous and non-ferrous metals. The non-woven ceramic construction resists loading and maintains cut rate longer than conventional abrasive discs in high-heat or heavy-scale conditions. Sold individually, this disc is appropriate for light production runs or spot repair work where per-piece flexibility is needed.

Key Features

• 4-inch diameter ceramic non-woven abrasive disc rated Extra Coarse for aggressive surface prep
• Speed-Lok TR (Type R) attaching system allows tool-free quick-change mounting
• Maximum rated speed of 8,000 RPM for use on compatible angle and die grinders
• Rigid disc flexibility maintains consistent contact pressure across flat and near-flat surfaces
• Non-woven ceramic construction resists loading and heat buildup during extended use
• Sold as single unit, compatible with standard Type R quick-change backup pads

Compatibility

Designed for use with angle grinders and die grinders fitted with a Type R (Speed-Lok TR) quick-change backup pad. Verify that the tool spindle speed does not exceed the 8,000 RPM disc rating before mounting.

Installation Notes

Installation of quick-change abrasive discs should be performed by qualified personnel following the tool and abrasive manufacturer guidelines. Power down and disconnect the grinder from its power source before mounting or removing the disc. Confirm the backup pad and spindle are in good condition and that the tool free speed does not exceed the disc maximum RPM rating. Always wear appropriate personal protective equipment including eye and face protection when operating grinding equipment.