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3M™ Fibre Disc 785C GL Quick Change, 4-1/2 in 36, 25 per inner 100 per case Boxed

3M ID  60440206419    UPC#  00051144138883    3M Product Number  785C     
3M(TM) Fibre Disc 785C GL Quick Change
3M(TM) Fibre Disc 785C GL Quick Change
3M™ Fibre Disc 785C is a durable fiber disc featuring high-performance 3M ceramic/aluminum oxide blend abrasive ideal for blending, grinding applications, and weld removal. Our proprietary ceramic/aluminum oxide blend stands up to challenging applications, outcutting and outlasting aluminum oxide.


  • Ceramic/aluminum oxide abrasive blend self-sharpens yielding high cut rates and increased durability
  • Stiff fiber backing provides the durability needed for weld removal and other medium pressure applications such as deburring or rust removal
  • Grinding aid reduces grinding temperatures for processes involving heat-sensitive alloys such as stainless steel, nickel alloys, and titanium
  • Compatible with 3M™ disc pad face plates and hubs, and requires the use of a disc retainer nut (all sold separately)
  • Available in a variety of sizes to suit different applications
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Our 3M™ Fibre Disc 785C incorporates a grinding aid to keep the workpiece cooler, protecting heat-sensitive alloys from heat damage and reducing re-work. These features along with a stiff fiber backing offer increased productivity for heavy-duty grinding on all metals, including stainless steel.

For optimal performance, the disc should be used with a face plate of the appropriate density for the application—a lighter density face plate for lighter weight grinding applications, and a harder density face plate for more heavyweight grinding applications. Using the correct face plate for the application ensures that the abrasive mineral will fracture as it should, maximizing the life of the abrasive. Face plates are sold separately.

Our 3M™ Ceramic Abrasive Grain is designed to enhance hardness and toughness of the mineral. For increased performance, 785C products feature aluminum oxide blended with 3M ceramic abrasive grain, yielding excellent performance on any metal. Perfect for moderate to heavy stock removal, ceramic abrasives are engineered to cut fast and handle intense heat and stress applications. Ceramic/aluminum oxide blends surpass regular aluminum oxide abrasives in cut-rate and durability, making them an excellent choice for difficult grinding applications.

Fiber discs are heavy-duty discs ideal for weld removal, grinding, and blending large and small areas of metal surfaces. They feature a tough, stiff backing that resist wear and can handle tough grinding applications.


 Application Category‎‎ Blending/Deburring,‎ Grinding/Metal Stock Removal
 Applications‎‎ Blending,‎ Grinding,‎ Weld Removal & Finishing
 Attachment Type‎‎ GL
 Backing Material‎‎ Fiber,‎ Fibre
 Brand‎‎ 3M,‎ 3M™
 Coat Type‎‎ Closed Coat
 Color‎‎ Orange
 Converted Form‎‎ Fibre Disc
 Diameter‎‎ 4.5 Inch
 Diameter (Metric)‎‎ 114.3 mm
 Equipment - Machines‎‎ Right Angle Grinders
 Form Type‎‎ Fibre
 Grade‎‎ 36
 Industries‎‎ Metalworking
 Max RPM‎‎ 13300
 Max Speed‎‎ 80 mps
 Mineral Type‎‎ Ceramic
 Position‎‎ Better
 Primary Application‎‎ Metalworking
 Product Form‎‎ Disc
 Sub Industries‎‎ Metal Fabrication
 Substrates‎‎ Aluminum,‎ Stainless Steel