5" Silicon Carbide Resin Fiber Disc – 25 Pack

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Product Specification

5" SILICON CARBIDE RESIN FIBER DISC – 25 PACK

Benchmark Abrasives 5" silicon carbide resin fiber discs deliver fast cutting action and a consistent scratch pattern on masonry, stone, glass, non-ferrous metals, fiberglass, plastics, hard rubber, and selected wood applications. Silicon carbide is an extremely hard, sharp, and highly friable abrasive grain that fractures readily during use to expose fresh cutting edges, making it especially effective on hard, brittle, and non-ferrous materials.

Each disc uses silicon carbide abrasive electrostatically bonded to heavy-duty vulcanized fiber backing with heat-resistant phenolic resin. The backing provides strong support under grinding pressure and helps transfer power efficiently to the workpiece for controlled stock removal. Available from aggressive 16 grit through finer 120 grit, these discs cover heavy material removal, shaping, deburring, blending, and surface preparation. A backing pad is required and sold separately.

Quantity: 25 Discs

Dimensions & Specifications

Product Features

• Sharp silicon carbide abrasive for fast cutting and controlled material removal.
• Highly friable grain continually fractures to expose fresh cutting edges.
• Produces a consistent, uniform scratch pattern.
• Excellent performance on masonry, stone, glass, and non-ferrous materials.
• Heat-resistant phenolic resin bond for durability during use.
• Heavy-duty vulcanized fiber backing provides strong support under grinding pressure.
• Resistant to heat, glazing, and loading.
• Wide grit range for aggressive material removal through finer surface preparation.
• 7/8" center hole for use with compatible right-angle grinder backing pads.
• 25 discs per package.

Machines Used On

• Right-Angle Grinders
• Angle Grinders

Backing Pad Required: Use with a compatible 5" x 5/8"-11 resin fiber disc backing pad. Backing pads are sold separately.

Always make sure the disc, backing pad, and grinder are compatible in diameter, arbor, and operating speed. Never exceed the maximum RPM of the lowest-rated component in the system.

Applications

Ideal for grinding, sanding, deburring, and surface preparation applications including:

• Stock removal
• Surface leveling
• Shaping and contouring
• Edge preparation
• Deburring
• Cleaning and surface preparation
• Blending and smoothing
• Removing surface imperfections
• Grinding masonry and stone
• Glass edge deburring
• Aggressive sanding on selected non-metal materials

Materials

Commonly used on:

• Stone
• Marble
• Granite
• Engineered Stone
• Concrete
• Glass
• Copper
• Other Non-Ferrous Metals
• Fiberglass
• Plastics and Composites
• Hard Rubber
• Wood

Not Recommended for Steel or Stainless Steel: Silicon carbide breaks down too quickly under the sustained grinding pressure typically used on steel. Benchmark recommends Aluminum Oxide, Zirconia, or Ceramic resin fiber discs for steel applications instead. The current product page also specifically cautions against steel and stainless steel use.

Tip: Silicon carbide cuts quickly because its sharp grain fractures readily during use. Use controlled pressure and allow the abrasive to cut rather than forcing the grinder excessively.

Silicon Carbide vs. Aluminum Oxide, Zirconia & Ceramic

Silicon Carbide

Silicon Carbide is the preferred choice for masonry, stone, glass, many non-ferrous materials, and other hard or brittle surfaces. Its sharp, friable grain cuts quickly but wears too rapidly to be the best option for sustained steel grinding.

Aluminum Oxide

Aluminum oxide is the economical choice for general-purpose steel grinding and everyday shop work.

Zirconia

Zirconia provides longer life and stronger performance under sustained grinding pressure, making it well suited to heavier steel fabrication and weld removal.

Ceramic

Ceramic is the premium choice for demanding production grinding, stainless steel, hard alloys, and applications where cutting speed and abrasive life are the priority.

Safety Tips & Techniques

• Always use a compatible backing pad specifically designed for resin fiber discs.
• Inspect the disc and backing pad before use. Do not use damaged, cracked, torn, or moisture-compromised discs.
• Never exceed the maximum RPM marked for the disc, backing pad, or grinder.
• Keep the grinder guard properly installed and positioned.
• Use appropriate eye and face protection, hearing protection, gloves, protective clothing, and respiratory protection.
• Use appropriate eye and face protection, hearing protection, gloves, protective clothing, and respiratory protection.
• Use controlled working pressure and allow the silicon carbide grain to cut.
• Keep the grinder moving across the workpiece to help control heat and avoid gouging.
• Store fiber discs in a clean, dry environment to protect the backing from moisture and damage.