Norton 63642503663 Disc Backing Pad Locking Nut 5/8-11

Product Description

The NORTON 63642503663 is a disc backing pad with a locking nut attachment designed for use with angle grinders and disc sanders in surface preparation and finishing applications. The 5/8-11 threaded hub provides a secure, industry-standard mount to compatible grinder spindles. Rated at 13,000 maximum RPM, this backing pad handles aggressive stock removal as well as finish grinding passes. Medium density construction balances rigidity and compliance, allowing the abrasive disc to conform to workpiece contours without excessive deflection. Licensed trades including metalworkers, fabricators, and general contractors rely on this type of backing pad as a consumable interface between the tool and the abrasive disc.

This backing pad is suited for use in metal fabrication shops, construction sites, and maintenance environments where disc grinding is performed with a 5/8-11 spindle angle grinder. The Speed-Lok quick-change compatibility allows for faster disc swaps during production or multi-grit workflows without removing the pad from the tool. It is appropriate for residential and light commercial job sites where surface prep, weld blending, or rust removal is required.

Key Features

• Locking nut attachment type for secure disc retention during operation
• 5/8-11 threaded hub fits standard angle grinder spindles
• 13,000 maximum RPM rating for high-speed grinder compatibility
• Medium density construction balances rigidity and disc conformance
• Speed-Lok quick-change compatibility for faster abrasive disc changes

Compatibility

Designed as an OEM-style replacement or service backing pad for angle grinders with a 5/8-11 spindle thread and Speed-Lok quick-change disc systems.

Installation Notes

Installation and replacement of backing pads is typically performed by the equipment operator or tool maintenance technician. Always power down and disconnect the angle grinder from its power source before removing or installing a backing pad. Thread the 5/8-11 hub onto the grinder spindle and secure with appropriate tooling per the grinder manufacturer instructions. Ensure the maximum RPM rating of the backing pad meets or exceeds the no-load RPM of the grinder before operation.