Premium Performance Tackles Carbon Steel Applications
Balance cost and output by selecting the abrasive with precisely the right amount of cut and life, no more and no less. 3M™ Fibre Disc 782C contains Precision Shaped Grain (PSG) to optimize the balance of speed and longevity for many of your carbon steel operations. Disc construction includes a stiff fiber backing and strong resin bond that provide durability and tear-resistance, which along with fast-cutting abrasive grain enables operators to complete more parts per disc and requires fewer disc changes.
The exceptional life and cut of our 782C Fibre Disc make it one of 3M’s best grinding discs for high production environments, providing significant gains over conventional fiber discs. When our highest-tier fiber disc may be under-utilized but productivity is still your bottom line, our 782C Fibre Disc delivers outstanding throughput. This fiber disc is an excellent choice for a range of applications such as:
- Edge chamfering
- Beveling
- Deburring
- Weld removal
Step Up Production with 3M Precision Shaped Grain
Developed for improved output on light to heavy stock removal, 3M Precision Shaped Grain lets operators finish tough tasks faster and with less fatigue. Because the grain wears evenly and stays sharp, PSG abrasives last significantly longer than their conventional ceramic counterparts, ensuring extended high performance in production applications.
To accomplish this level of performance, 3M engineers apply proprietary microreplication technology to create precise triangular structures of 3M™ Ceramic Abrasive Grain, and then electrostatically orient them on the backing to form sharp peaks. These ultra-sharp peaks slice cleanly through metal rather than gouging or “plowing” as conventional abrasives do, and continuously self-sharpen as the points break off.
Attachment Styles
To suit many different project needs, we offer these discs in a range of sizes and a variety of attachment styles. We offer 7/8″ center hole (CH) discs that require the use of a 3M disc pad face plate and 3M hub. This ensemble is attached to a right angle grinder with a disc retainer nut (all sold separately). Also available are GL and TN style discs with convenient built-in fasteners to provide reliable attachment to the tool and easy disc changes between applications. Smaller sized discs with quick change attachments are sold separately as 3M™ Roloc™ Fibre Disc 782C.
Tips for Optimal Use
Fiber discs are heavy-duty abrasives that feature a tough, stiff backing made from vulcanized fiber that resist wear and can handle tough grinding applications. 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 re-sharpen, maximizing the life of the abrasive.
3M Engineered for Peak Productivity
3M Abrasives engineers know abrasive construction. For more than 100 years 3M has been a leading abrasive supplier for the metalworking and woodworking industries, and we offer a complete line of high quality metalworking abrasive solutions to meet your tough jobs. Our 3M™ Fibre Disc 782C is designed to enable operators to take production to the next level by completing more work in less time. It is a prime example of how 3M science provides advanced solutions to help industrial businesses operate faster, better and more efficiently.

Dynabrade 53080 1/2" Right Angle Drill, .7 HP, Rear Exhaust, 3,400 RPM
Dynabrade 51705 .1 hp Straight-Line Pencil Grinder, Rear Exhaust, 50,000 RPM, 3/32" Collet
Dynabrade 78780 3/8" x 1-1/2"-W176 Dynacut Cotton Fibre Polishing Mounted Point, 120GFX, 10/pack
Dynabrade 93394 4" Dia. x 1/2" Center Hole, 150 Grit, A/O,. Arbor-Mount Sanding Star, 10/pack
Dynabrade 15108 Knob Assembly
Dynabrade 11462 Dynabelter Finisher
Dynabrade 76020 Lubri-Pak
Dynabrade 11738 Contact Arm Adapter
Dynabrade 61470 Raptor Vac Pneumatic Vacuum - Wall-Mount Style, 1.5 Gallon
Dynabrade 78292 2" Dia. x 6A M Medium Type R Unitized Locking-Type Disc, 25/pack
Dynabrade 82558 1/8" W x 18" L 80 Grit Ceramic DynaCut Belt, 50/pack
Dynabrade 78733 7/8" x 2"-A11 Dynacut A/O Mounted Point, Vitrified, 5/pack
Dynabrade 78696 D8-6 Cartridge Roll Mandrel 1/8" Pilot Dia. x 3/4" Pilot Length, 1/4" Dia. Shank x 6" Shank Length
Dynabrade 92768 4" W x 150' L 60 Micron A/O Microfinishing Film DynaCut Roll
Dynabrade 51393 6"-8" Dia. Right Angle Two-Hand Rotary Buffer, 1 hp, 4,500 RPM, Rear Exhaust, 5/8"-11 Thread
Dynabrade 78562 3" Dia. 2-Set, 1/4-20 Female Center Thread, 80 Grit, Dynacut A/O Overlap Slotted Disc, 100/pack
Dynabrade 78728 1/8" x 3/8"-B97 Dynacut A/O Mounted Point, Vitrified, 5/pack
Dynabrade 96355 Phillips Screwdriver
Dynabrade 50610 6" Dia. Vacuum Disc Pad, Hook-Face, Long Nap
Dynabrade 79492 4-1/4" Dia. x 4" W x 5/8"-11 Center Thread, Medium, DynaBrite Surface Conditioned Flap Roll
Dynabrade 64423 Mist Trap
Standard Abrasives 717851, A/O Straight Cartridge Roll, 1/8 in x 1 in x 5/64 in 240, 7100102797
Dynabrade 90424 1/4" W x 24" L 220 Grit A/O DynaCut Belt, 50/pack
Dynabrade 56830 6" Dia. Central Vacuum Dynorbital Supreme Random Orbital Sander, 3/16" Orbit
Dynabrade 80022 Dynamount Bench Mount (for Dynabelters)
Dynabrade 02038 Front Bearing Plate
Dynabrade 92748 2" W x 50' L 30 Micron, Diamond Lapping Film DynaCut Roll
Dynabrade 78734 3/4" x 1-1/8"-A5 Dynacut A/O Mounted Point, Vitrified, 5/pack
Dynabrade 78726 3/8" x 3/8"-B122 Dynacut A/O Mounted Point, Vitrified, 5/pack
Dynabrade 61201 RaptorVac Electric DrumVac Kit, Dual Operator, For Use With Tools
Dynabrade 48365 .4 hp Straight-Line Die Grinder, Rear Exhaust, 20,000 RPM, 1/8" Collet
Dynabrade 48542 2" Dia. Right Angle Disc Sander, Rear Exhaust, .4 HP, 20,000 RPM
Dynabrade 64903 Variable Speed Versatility Grinder, 3 hp, 460 V (AC), 3 Phase, 50/60 Hz, 2,000-8,000 SFPM, 1/4"-2" W x 72" L (6-51 mm x 122 cm) Belts
Dynabrade 93650 5" Dia. x 3/4" CH 40/50 Grit Side Spoked Diamond Cut-Off Wheel
Dynabrade 11476 Dynabelter Abrasive Belt Tool, Heavy-Duty
Dynabrade X51V 5" (127 mm) Dia. Central-Vacuum Dynorbital Extreme Random Orbital Sander, .3 HP, 12,000 RPM, 3/16" Orbit, Hook-Face 
