3M 7100178269 | 4-1/2" Diameter 787C 120+ Grit Precision Shaped Ceramic Fiber Disc

Description

The 3M 7100178269 3M fibre disc 787C is a professional-grade 4-1/2 inch 120 grit sanding disc engineered for controlled cutting and consistent performance in demanding metalworking environments. Commonly referred to as the 3M 787C, this disc is constructed using a ceramic precision shaped abrasive disc design that delivers faster cutting action, improved surface consistency, and longer service life when compared to conventional abrasive products. It is widely used as a disc for weld grinding applications, as well as for surface preparation and light finishing tasks where precision and surface quality are critical. The precision-shaped grain fractures evenly during operation, helping maintain sharp cutting edges while reducing heat buildup and minimizing disc wear. Designed for compatibility with standard angle grinders and appropriate backup pads, the 3M fibre disc 787C supports stable operation and reliable results across fabrication, maintenance, and repair work. While it is often compared to 120 grit aluminum oxide sandpaper, this ceramic abrasive disc is specifically intended for metal applications, offering superior durability, cutting efficiency, and overall performance in professional settings

Product Features and Benefits

Precision Shaped Ceramic Grain

Engineered grain structure allows faster cutting and consistent performance throughout the life of the disc

. 120 Grit Sanding Disc Balance

The 120 grit provides controlled material removal, making it suitable for blending welds and preparing metal surfaces

. Designed for Weld Grinding Applications

This disc for weld grinding applications helps smooth weld seams while maintaining surface integrity

. Durable Fibre Backing

The reinforced fibre construction supports stable grinding under pressure and reduces disc breakdown

. Angle Grinder Compatibility

Designed to work with standard angle grinders and backing pads for easy integration into existing setups

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Frequently Asked Questions

What is the 3M fibre disc 787C used for?

The 3M fibre disc 787C is used for weld grinding applications, metal surface preparation, and controlled finishing on steel and other metals

. What is precision shaped grain abrasive and why does it matter?

Precision shaped grain abrasive uses engineered ceramic grains that fracture evenly, providing faster cutting, longer disc life, and reduced heat buildup

. Is this 120 grit sanding disc suitable for drywall work?

While users may ask, this ceramic fibre disc is designed for metal, not drywall or joint compound sanding

. How does this compare to 120 grit aluminum oxide sandpaper?

Compared to 120 grit aluminum oxide sandpaper, this ceramic precision shaped abrasive disc offers longer life and more consistent cutting on metal surfaces

. What tools are compatible with the 3M 7100178269 disc?

The 3M 7100178269 is compatible with standard angle grinders when used with the appropriate backing pad for fibre discs

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Warning:

This product can expose you to materials and/or chemicals including arsenic, lead, and other materials and/or chemicals which are known to the state of California to cause cancer and/or reproductive harm.

For more information, visit www.P65Warnings.ca.gov