Benchmark Abrasives 4-1/2" 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, sharp cutting edges, helping the disc maintain its cutting rate longer than conventional Aluminum Oxide or Zirconia abrasives. This makes ceramic an excellent choice for stainless steel, high-nickel alloys, super alloys, and production environments where speed and abrasive life matter.
Each disc combines premium ceramic abrasive with a heat-resistant resin bond and heavy-duty vulcanized fiber backing. The rigid backing provides strong support under grinding pressure and efficiently transfers power to the workpiece for rapid material removal. Ceramic's cooler-cutting action is especially beneficial on heat-sensitive metals where excessive heat can cause discoloration or affect the workpiece. Available from aggressive 24 grit through finer 120 grit, these discs cover everything from heavy weld removal and beveling to blending and pre-finish surface preparation.
These discs are designed for use on right-angle grinders with a compatible 4-1/2" backing pad. A backing pad is required and sold separately.
Quantity: 25 Discs
Dimensions & Specifications
Specification
Details
Disc Diameter
4-1/2"
Arbor / Center Hole
7/8"
Abrasive Grain
Ceramic
Backing
Heavy-Duty Vulcanized Fiber
Available Grits
24, 36, 50, 60, 80, 120
Maximum RPM
13,300
Use
Dry use only
Quantity
25 Discs
Product Features
Premium ceramic abrasive for rapid stock removal and demanding grinding applications
Self-sharpening ceramic grain micro-fractures to continually expose fresh cutting edges
Fast cutting and extended abrasive life in suitable high-pressure applications; results vary by material, speed, pressure, and technique
Ceramic grain can help limit heat buildup and workpiece discoloration when used with proper pressure, speed, and technique
Heat-resistant resin bond withstands demanding grinding conditions
Heavy-duty vulcanized fiber backing provides strong support and efficient pressure transfer
Designed to resist heat, glazing, and loading during demanding applications
Excellent choice for stainless steel, high-nickel alloys, titanium, 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
Use only with a grinder, guard, backing pad, and retaining hardware approved for the same disc diameter and attachment. The grinder's rated speed must not 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
Tip: Ceramic abrasive is designed to fracture and expose new cutting edges as it works. Consistent grinding pressure helps activate this self-sharpening action. Using too little pressure can allow the abrasive to rub instead of fracture, reducing cutting efficiency and limiting the performance advantage of ceramic grain.
Aluminum Oxide vs. Zirconia vs. Ceramic
Aluminum Oxide
Aluminum oxide is the economical choice for general-purpose grinding, lighter-duty applications, and everyday shop work where maximum abrasive life is not the primary concern.
Zirconia
Zirconia offers a step up in durability and cutting performance. Its tough, self-sharpening grain performs well under sustained pressure and provides longer life than Aluminum Oxide for demanding steel fabrication, weld removal, and stock removal.
Ceramic
Ceramic is the premium choice for the most demanding grinding applications. Its engineered grain micro-fractures at a finer level to continually expose sharp cutting edges, providing faster cutting, longer abrasive life, and cooler grinding when used under appropriate pressure. Ceramic is particularly valuable for stainless steel, high-nickel alloys, titanium, super alloys, and high-production environments.
Abrasive Grain
Cutting Speed
Abrasive Life
Best Use
Aluminum Oxide
Good
Good
General-purpose and economical grinding
Zirconia
Better
Longer
Sustained grinding, fabrication, and heavier stock removal
Ceramic
Best
Longest
High-production grinding, stainless steel, hard alloys, and maximum stock removal
For occasional or general shop grinding, Aluminum Oxide may provide the best value. For heavier fabrication and sustained grinding, Zirconia offers an excellent balance of performance and cost. Choose Ceramic when productivity, cutting speed, cooler grinding, and abrasive life justify the premium.
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 operate the grinder above the maximum RPM marked for the disc or backing pad. The grinder's rated speed must not exceed the lowest accessory rating; follow all tool and accessory instructions.
Keep the grinder guard properly installed and positioned.
Apply consistent working pressure to help activate the ceramic grain's self-sharpening action.
Avoid excessive pressure that can overload the grinder, backing pad, or workpiece.
Keep the grinder moving across the workpiece to distribute heat and prevent gouging.
Store fiber discs in a clean, dry environment to protect the vulcanized fiber backing from moisture and damage.
Frequently Asked Questions
Ceramic resin fiber discs are designed for demanding grinding applications including heavy stock removal, weld removal, weld leveling, beveling, deburring, shaping, blending, and surface preparation. Their fast-cutting ceramic abrasive makes them especially useful for stainless steel, hard alloys, and production grinding.
Ceramic abrasive is an engineered grain designed to micro-fracture during grinding. Instead of simply becoming dull as it wears, the grain continually exposes fresh cutting edges when used under proper grinding pressure. This allows ceramic discs to maintain an aggressive cutting rate and provide longer abrasive life.
Choose Ceramic when maximum cutting speed, abrasive life, and productivity are the priorities. Zirconia also self-sharpens and provides excellent durability, but Ceramic fractures at a finer level and generally maintains its cutting action longer in demanding, high-pressure applications. Ceramic is especially advantageous on stainless steel, titanium, high-nickel alloys, and other difficult-to-grind metals.
Yes. Resin fiber discs must be supported by a compatible backing pad during use. This 4-1/2" disc uses a matching 4-1/2" backing pad designed for a right-angle grinder. Backing pads are sold separately.
Use 24–36 grit for heavy stock removal, weld leveling, shaping, and aggressive grinding. Use 50–60 grit for general grinding, weld blending, beveling, and deburring. Use 80–120 grit for finer blending, smoothing, and preparation before subsequent finishing operations.
Yes. Ceramic resin fiber discs are particularly well suited to stainless steel. Their fast cutting action and ability to continuously expose fresh abrasive edges help remove material efficiently while limiting unnecessary heat buildup that can contribute to discoloration.
Yes. Ceramic abrasive is an excellent choice for difficult-to-grind materials such as titanium, nickel, high-nickel alloys, and super alloys. These materials generate substantial heat during grinding, making the efficient, cooler-cutting characteristics of ceramic especially useful.
Yes. These discs can be used for aggressive sanding and material removal on wood. Because ceramic grain cuts aggressively, use controlled pressure and select the grit carefully to avoid removing more material than intended.
No. These ceramic resin fiber discs are for dry use only. Do not use them wet.
The maximum rated speed for these 4-1/2" ceramic resin fiber discs is 13,300 RPM. Never exceed the rated speed of the disc, backing pad, or grinder. Always use the lowest maximum RPM specified among the components in the grinding system.
Not necessarily. Ceramic provides the greatest benefit in demanding applications where sufficient grinding pressure, difficult materials, and higher production requirements allow the grain to continually self-sharpen. For lighter grinding or occasional use, Aluminum Oxide may be more economical. Zirconia is an excellent middle option for users who want longer life and more aggressive performance without the higher cost of Ceramic.
Benchmark Abrasives 4-1/2" 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, sharp cutting edges, helping the disc maintain its cutting rate longer than conventional Aluminum Oxide or Zirconia abrasives. This makes ceramic an excellent choice for stainless steel, high-nickel alloys, super alloys, and production environments where speed and abrasive life matter.
Each disc combines premium ceramic abrasive with a heat-resistant resin bond and heavy-duty vulcanized fiber backing. The rigid backing provides strong support under grinding pressure and efficiently transfers power to the workpiece for rapid material removal. Ceramic's cooler-cutting action is especially beneficial on heat-sensitive metals where excessive heat can cause discoloration or affect the workpiece. Available from aggressive 24 grit through finer 120 grit, these discs cover everything from heavy weld removal and beveling to blending and pre-finish surface preparation.
These discs are designed for use on right-angle grinders with a compatible 4-1/2" backing pad. A backing pad is required and sold separately.
Quantity: 25 Discs
Dimensions & Specifications
Specification
Details
Disc Diameter
4-1/2"
Arbor / Center Hole
7/8"
Abrasive Grain
Ceramic
Backing
Heavy-Duty Vulcanized Fiber
Available Grits
24, 36, 50, 60, 80, 120
Maximum RPM
13,300
Use
Dry use only
Quantity
25 Discs
Product Features
Premium ceramic abrasive for rapid stock removal and demanding grinding applications
Self-sharpening ceramic grain micro-fractures to continually expose fresh cutting edges
Fast cutting and extended abrasive life in suitable high-pressure applications; results vary by material, speed, pressure, and technique
Ceramic grain can help limit heat buildup and workpiece discoloration when used with proper pressure, speed, and technique
Heat-resistant resin bond withstands demanding grinding conditions
Heavy-duty vulcanized fiber backing provides strong support and efficient pressure transfer
Designed to resist heat, glazing, and loading during demanding applications
Excellent choice for stainless steel, high-nickel alloys, titanium, 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
Use only with a grinder, guard, backing pad, and retaining hardware approved for the same disc diameter and attachment. The grinder's rated speed must not 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
Tip: Ceramic abrasive is designed to fracture and expose new cutting edges as it works. Consistent grinding pressure helps activate this self-sharpening action. Using too little pressure can allow the abrasive to rub instead of fracture, reducing cutting efficiency and limiting the performance advantage of ceramic grain.
Aluminum Oxide vs. Zirconia vs. Ceramic
Aluminum Oxide
Aluminum oxide is the economical choice for general-purpose grinding, lighter-duty applications, and everyday shop work where maximum abrasive life is not the primary concern.
Zirconia
Zirconia offers a step up in durability and cutting performance. Its tough, self-sharpening grain performs well under sustained pressure and provides longer life than Aluminum Oxide for demanding steel fabrication, weld removal, and stock removal.
Ceramic
Ceramic is the premium choice for the most demanding grinding applications. Its engineered grain micro-fractures at a finer level to continually expose sharp cutting edges, providing faster cutting, longer abrasive life, and cooler grinding when used under appropriate pressure. Ceramic is particularly valuable for stainless steel, high-nickel alloys, titanium, super alloys, and high-production environments.
Abrasive Grain
Cutting Speed
Abrasive Life
Best Use
Aluminum Oxide
Good
Good
General-purpose and economical grinding
Zirconia
Better
Longer
Sustained grinding, fabrication, and heavier stock removal
Ceramic
Best
Longest
High-production grinding, stainless steel, hard alloys, and maximum stock removal
For occasional or general shop grinding, Aluminum Oxide may provide the best value. For heavier fabrication and sustained grinding, Zirconia offers an excellent balance of performance and cost. Choose Ceramic when productivity, cutting speed, cooler grinding, and abrasive life justify the premium.
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 operate the grinder above the maximum RPM marked for the disc or backing pad. The grinder's rated speed must not exceed the lowest accessory rating; follow all tool and accessory instructions.
Keep the grinder guard properly installed and positioned.
Apply consistent working pressure to help activate the ceramic grain's self-sharpening action.
Avoid excessive pressure that can overload the grinder, backing pad, or workpiece.
Keep the grinder moving across the workpiece to distribute heat and prevent gouging.
Store fiber discs in a clean, dry environment to protect the vulcanized fiber backing from moisture and damage.
Frequently Asked Questions
Ceramic resin fiber discs are designed for demanding grinding applications including heavy stock removal, weld removal, weld leveling, beveling, deburring, shaping, blending, and surface preparation. Their fast-cutting ceramic abrasive makes them especially useful for stainless steel, hard alloys, and production grinding.
Ceramic abrasive is an engineered grain designed to micro-fracture during grinding. Instead of simply becoming dull as it wears, the grain continually exposes fresh cutting edges when used under proper grinding pressure. This allows ceramic discs to maintain an aggressive cutting rate and provide longer abrasive life.
Choose Ceramic when maximum cutting speed, abrasive life, and productivity are the priorities. Zirconia also self-sharpens and provides excellent durability, but Ceramic fractures at a finer level and generally maintains its cutting action longer in demanding, high-pressure applications. Ceramic is especially advantageous on stainless steel, titanium, high-nickel alloys, and other difficult-to-grind metals.
Yes. Resin fiber discs must be supported by a compatible backing pad during use. This 4-1/2" disc uses a matching 4-1/2" backing pad designed for a right-angle grinder. Backing pads are sold separately.
Use 24–36 grit for heavy stock removal, weld leveling, shaping, and aggressive grinding. Use 50–60 grit for general grinding, weld blending, beveling, and deburring. Use 80–120 grit for finer blending, smoothing, and preparation before subsequent finishing operations.
Yes. Ceramic resin fiber discs are particularly well suited to stainless steel. Their fast cutting action and ability to continuously expose fresh abrasive edges help remove material efficiently while limiting unnecessary heat buildup that can contribute to discoloration.
Yes. Ceramic abrasive is an excellent choice for difficult-to-grind materials such as titanium, nickel, high-nickel alloys, and super alloys. These materials generate substantial heat during grinding, making the efficient, cooler-cutting characteristics of ceramic especially useful.
Yes. These discs can be used for aggressive sanding and material removal on wood. Because ceramic grain cuts aggressively, use controlled pressure and select the grit carefully to avoid removing more material than intended.
No. These ceramic resin fiber discs are for dry use only. Do not use them wet.
The maximum rated speed for these 4-1/2" ceramic resin fiber discs is 13,300 RPM. Never exceed the rated speed of the disc, backing pad, or grinder. Always use the lowest maximum RPM specified among the components in the grinding system.
Not necessarily. Ceramic provides the greatest benefit in demanding applications where sufficient grinding pressure, difficult materials, and higher production requirements allow the grain to continually self-sharpen. For lighter grinding or occasional use, Aluminum Oxide may be more economical. Zirconia is an excellent middle option for users who want longer life and more aggressive performance without the higher cost of Ceramic.
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