3M 7100310729 Fiber Disc 36 Grit 7 in Quick Change Tn

Product Description

The 3M 7100310729 is a 7-inch resin-bonded fiber disc designed for aggressive material removal on metal, weld seams, and surface prep applications. Built on a fiber backing with a premium ceramic alumina abrasive, this disc delivers consistent stock removal across its service life. The 36-grit, extra-coarse cut rating makes it suitable for rapid grinding, deburring, and scale removal. It attaches via a Quick Change TN hub, allowing fast disc swaps without additional tooling. Rated to a maximum of 8,600 RPM, it is engineered for use on right-angle grinders and disc sanders equipped with a compatible TN-style holder. The purple 1182C series coating indicates the ceramic alumina abrasive formulation.

This disc is used in industrial, fabrication, and maintenance settings where fast, controlled material removal is required on ferrous and non-ferrous metals. Typical applications include weld blending, edge chamfering, rust and scale removal, and rough surface conditioning. It is commonly specified by metal fabricators, pipefitters, ironworkers, and maintenance technicians working on structural steel, pipe, and sheet metal. The extra-coarse grit is appropriate for initial stock removal passes rather than finish work.

Key Features

• Premium ceramic alumina abrasive for fast cut rate and extended disc life
• 36 grit extra-coarse grade suited for aggressive stock removal
• Quick Change TN attachment for tool-free disc changes
• Resinoid bond construction provides durability under load
• Fiber backing supports consistent abrasive contact on curved and flat surfaces
• 8,600 RPM maximum speed rating for use on standard right-angle grinders

Compatibility

Designed for use with right-angle grinders and disc sanders fitted with a Quick Change TN-style hub or holder. Verify that the tool spindle speed does not exceed the 8,600 RPM maximum disc rating before use.

Installation Notes

Installation and disc changes should be performed with the grinder disconnected from power. Confirm the TN hub is fully seated and locked before operation. Always verify that the tool RPM rating meets or falls below the 8,600 RPM maximum disc speed. Operators should wear appropriate PPE including eye protection and gloves when mounting or running abrasive discs.