Product Specification
5" X 7/8" CERAMIC RESIN FIBER DISCS – 25 PACK
Benchmark Abrasives 5" ceramic resin fiber discs deliver fast, aggressive stock removal and extended cutting life for demanding grinding applications. Engineered ceramic abrasive continuously micro-fractures under grinding pressure to expose fresh cutting edges, helping the disc maintain a strong cutting rate on stainless steel, high-nickel alloys, titanium, superalloys, and other difficult-to-grind metals.
Each disc combines premium ceramic abrasive with a heat-resistant resin bond and heavy-duty vulcanized fiber backing. The rigid backing supports the abrasive under pressure and helps transfer power efficiently to the workpiece for rapid material removal. Ceramic's cooler-cutting action makes it especially useful on heat-sensitive metals where excess heat can cause discoloration. Available in 24, 36, 50, 60, 80, and 120 grit, these discs cover heavy grinding through blending and surface preparation.
These discs are designed for use on right-angle grinders with a compatible 5" backing pad. A backing pad is required and sold separately.
Quantity: 25 Discs
Dimensions & Specifications
| Specification | Details |
|---|---|
| Disc Diameter | 5" |
| Arbor / Center Hole | 7/8" |
| Abrasive Grain | Ceramic |
| Backing | Vulcanized Fiber |
| Available Grits | 24, 36, 50, 60, 80, 120 |
| Maximum RPM | 12,200 |
| Use | Dry use only |
| Quantity | 25 Discs |
Product Features
- Premium ceramic abrasive for rapid stock removal and demanding grinding.
- Self-sharpening ceramic grain micro-fractures to continually expose fresh cutting edges.
- Excellent cutting speed and extended abrasive life under sustained grinding pressure.
- Cooler-cutting performance helps reduce heat buildup and workpiece discoloration.
- Heat-resistant resin bond withstands demanding grinding conditions.
- Heavy-duty vulcanized fiber backing provides strong support and efficient pressure transfer.
- Resistant to heat, glazing, and loading.
- Excellent choice for stainless steel, titanium, nickel, and super alloys.
- Wide grit range for heavy grinding through blending and surface preparation.
- 7/8" center hole for use with compatible right-angle grinder backing pads.
- Suitable for dry use only.
- 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 demanding grinding and surface preparation applications including:
- Heavy stock removal
- Weld removal and weld leveling
- Weld blending
- Beveling and edge preparation
- Deburring
- Shaping and contouring
- Grinding heat-sensitive metals
- Rust and corrosion removal
- Paint and coating removal
- Cleaning and surface preparation
- Blending and smoothing
- Production grinding
Materials
Commonly used on:
- Carbon Steel
- Stainless Steel
- Cast Iron
- Titanium
- Nickel
- Wrought Iron
- High-Nickel Alloys
- Super Alloys
- Copper
- Brass
- Tin
- Wood
- Fiberglass
- Plastics and Composites
Benchmark's current listing specifically identifies cast iron, steel, stainless steel, titanium, nickel, wrought iron, super alloys, copper, brass, and tin, while also describing use on wood, fiberglass, plastics, and composites.

Tip: Ceramic abrasive is designed to fracture and expose fresh cutting edges under grinding pressure. Consistent working pressure helps activate this self-sharpening action and maintain cutting efficiency.
Aluminum Oxide vs. Zirconia vs. Ceramic
The economical choice for general-purpose grinding and everyday shop work.
Offers a step up in durability and cutting performance, making it well suited to sustained grinding, fabrication, and heavier stock removal.
The premium choice for demanding production grinding, stainless steel, titanium, high-nickel alloys, and applications where cutting speed, cooler grinding, and abrasive life are the priority.
For users working on difficult metals or high-production applications, Ceramic provides the strongest performance advantage of the three.
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. The lowest-rated component determines the maximum safe operating speed.
- Keep the grinder guard properly installed and positioned.
- Use appropriate eye and face protection, hearing protection, gloves, protective clothing, and respiratory protection for the material being worked.
- Apply consistent working pressure to help activate the ceramic grain's self-sharpening action.
- Keep the grinder moving across the workpiece to distribute heat and prevent gouging.
- Store fiber discs in a clean, dry environment to protect the backing from moisture and damage.
Frequently Asked Questions
SHIPPING
FREE LIGHTNING FAST SHIPPING!
You read that right, Free shipping on orders over $100 + Orders placed before 12 noon PST = SHIP SAME DAY! Orders placed after noon will ship the following day.
Standard FREE shipping is UPS Ground or USPS priority depending on size and weight. Most customers receive their order within 3-5 days from date of purchase. Faster shipping options available for additional charge. Free shipping not available on international orders. Free shipping will only be available to orders being delivered within the lower 48 states.
Refund
Not happy with your product? Welcome to hassle free returns. Just shoot us an email, call the toll free number or click the chat button below. One of our helpful employees will get you set up with an RGA and return shipping info.




































































