The Advanced Solution for Challenging 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 787C contains the exact amount of precision shaped grain (PSG) you need to optimize the balance of speed and longevity for challenging applications from grinding to deburring. Moreover, to keep the disc and workpiece cool, a grinding aid is incorporated, further prolonging disc life. Disc construction includes a stiff fiber backing and strong resin bond that provide durability and tear-resistance, which along with abrasive grain enables operators to complete more parts per disc and requires fewer disc changes.
The exceptional life and cut of our 787C 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 787C 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. It wears evenly, and because the abrasive itself stays cooler and sharper, 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.
Choice of Power Tool Attachment
To suit many different project needs, we offer these discs in a range of sizes and a variety of attachment styles. Larger sized discs have a 7/8 inch center hole and require the use of a 3M™ disc pad face plate and hub, which are attached to a right angle grinder with a disc retainer nut (all sold separately). GL and TN quick change attachments are an option for 4-1/2 inch to 7 inch discs. Smaller sized quick change Roloc™ Discs are also available (sold separately) and provide reliable attachment to the tool and easy disc changes between applications.
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 787C 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.

3M 98485, Scotch-Weld Low Odor Acrylic Adhesive DP8810NS, Gray, 490 mL Duo-Pak, 7010329557, 6/case
3M 28135, Hookit Clean Sanding Disc 900DZ, 6 in P100 J-weight, Die 500LG, 7010300153
3M 26130, PPS Series 2.0 Adapter, Type S35, 16 mm Female, 1.5 mm
Thread Stretched, 7100135926
Standard Abrasives 843932, Quick Change Surface Conditioning FE Disc, A/O Medium, TSM, Maroon, 7 in x 5/8"-11, 7010330326, 10/case
ACS Diamond Cloth Belt, CX1250 1" X 42" 200U
Air Turbine Tools 310RSV - 6mm Router Hand Tool Series, 25,000RPM, 33421
Dynabrade 14010 Dynafile Abrasive Belt Tool Versatility Kit
3M 76625, Roloc Disc 777F, 80 YF-weight, TR, 1 in, Die R100N, 7000045621
3M 45020, Diamond Grade DG3 Reflective Digital Sheeting 4081UDS, Fluorescent Yellow, 30 in x 50 yd, 1 Roll/Case, 7100282390
3M 54110, Scotch-Brite Roloc AL Surface Conditioning Disc TR, 1-1/2 in x NH A VFN, 7100075534, 200 per case
Dynabrade 40320 Dynafile II Abrasive Belt Tool
Dynabrade 51750 .1 hp Straight-Line Extension Pencil Grinder, Rear Exhaust, 60,000 RPM, 1/8" Collet
3M 97421, Aluminum Foil Tape 3380, Silver, 72 mm x 45 m, 3.25 mil, 7010375681
3M 11412, Roloc Disc 361F, 36 YF-weight, TR, 1 in, Die R100N, 7000045092
Dynabrade 60051 .1 hp Straight-Line Quick-Change Pencil Grinder, Rear Exhaust, 60,000 RPM, 1/8" Collet
3M 22399, Roloc Disc 361F, 50 YF-weight, TR, 2 in, Die R200P, 7000028184
Dynabrade 78182 3" Dia. Medium DynaBrite Locking-Type Disc, 25/pack
3M™ 37018, Supplied Air Respirator Vortex Cooling Assembly V-100/37018(AAD), 70070799013, 1 EA/Case
3M 16583, Accuspray Atomizing Head, Green, 1.3 mm, 7010309279
3M 22395, Roloc Disc 361F, 60 YF-weight, TR, 3 in, Die R300V, 7000045098
3M 66625, Cloth Belt 341D, 36 X-weight, 6 in x 48 in, Film-lok, Single-flex, 7000118861, 20 per case
3M 22392, Roloc Disc 361F, 24 YF-weight, TR, 3 in, Die R300V, 7000045090
3M 62617, Scotch-Weld Threadlocker TL90, Green, 250 mL Bottle, 7100039235, 2/case
3M 76783, Cubitron II Hookit Cloth Disc 784F, 120+ XF-weight, 5 in x NH, Die 500X, 7100222757
3M 21639, PSA Cloth Disc 348D, 36 X-weight, 6 in x NH, Die 600Z, 7000148149
3M 08025, Adhesive Sealant 740 UV, Black, 600 mL Sausage Pack, 7100057385, 12/Case
3M 20897, PSA Cloth Disc 348D, 80 X-weight, 4 in x NH, Die 400BB, 7010294664
3M 11414, Roloc Disc 361F, P120 XF-weight, TR, 1 in, Die R100N, 7000045104
3M 10120, Synthetic Steel Wool Pads, 10120NA, #000 Extra Fine, 7000126149
3M 45564, Cubitron ll Cloth Belt 784F, 80+ YF-weight, 3 in x 132 in, Film-lok, Single-flex, 7100145351, 25 per case
3M 26015, PPS Series 2.0 Adapter, Type S8, 12 mm Male, 1.0 mm Thread, 7100135931
3M 33446, Cubitron II File Belt, 80+, 1/2 in x 18 in (12.7 mm x 457.2 mm), 7100033186, 10 belts per carton, 5 cartons per case
3M 26120, PPS Series 2.0 Adapter, Type S28, 17.5 mm Female, 19 TPI
Thread, 7100135956
3M 33443, Cubitron II File Belt, 36+, 1/2 in x 18 in (12.7 mm x 457.2 mm), 7100033184, 10 belts per carton, 5 cartons per case
3M 32267, 641WY, 3" X 30", 400 Mesh, Diamond Cloth Belts, 7010534830
3M 76750, Roloc Disc 777F, 60 YF-weight, TS, 2 in, Die RS200P, 7010299188 
