3M™ Fibre Disc 782C TN Quick Change, 4-1/2 in 60+, 25/Bag, 100 ea/Case

Engineered for ultra-rapid cut on carbon steel, 3M™ Fibre Disc 782C features 3M Precision Shaped Grain. With its outstanding cut, durability, and ease of use, this disc offers a major step up in performance over conventional fiber discs. Advanced abrasive technology makes it an excellent choice for tough applications including weld removal, blending and finish refinement.
Special Price $4.39 Regular Price $5.16
UPC 00076308896041
3M ID 7100099034
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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 the 782C Fibre Disc make it one of 3M's best grinding discs for high production environments, providing significant gains over conventional fiber discs. When a higher-tier fiber disc may be under-utilized but productivity is still your bottom line, the 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, this disc is available in a range of sizes and a variety of attachment styles. The 7/8 inch center hole (CH) discs 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 they offer a complete line of high quality metalworking abrasive solutions to meet your tough jobs. The 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.


  • Rapidly cuts carbon steel
  • Premium mineral excels at heavyweight applications such as weld grinding, beveling, and edge chamfering
  • 3M Precision Shaped Grain yields higher cut rates while completing more parts per disc than conventional discs
  • Long-lasting abrasive helps reduce cost
  • Stiff fiber backing and strong resin bond provide durability and tear-resistance
  • Compatible with 3M™ disc pad face plates and hubs (sold separately)
More Information
3M ID 7100099034
Keywords 3M, 3M Fibre Disc 782C, fiber disc, precision shaped grain, carbon steel, weld removal, blending, finish refinement, rapid cut, abrasive technology, weld grinding, beveling, edge chamfering, premium mineral, tear-resistance, high production environments, stock removal, ceramic abrasives, microreplication technology, triangular structures, electrostatically oriented, attachment styles, right angle grinder, quick change attachments, face plate, metalworking, metalworking abrasive solutions, automotive, energy, manufacturing, transportation, aerospace, appliance, collision repair, commercial vehicles, defense, equipment maintenance, exterior and glass, heavy industrial, industrial maintenance, marine, metal fabrication, nuclear energy, paint prep, recreation vehicles, rail, rig fabrication, specialty vehicles, wind energy
Global Product Hierarchy Abrasives > Abrasive Discs > Fibre Grinding Discs
Abrasive Material Precision Shaped Ceramic
Application Beveling & Back Gouging, Deburring, Finishing, Grinding, Surface Preparation, Weld Grinding
Backing Material Fibre
Backing Thickness (Metric) 0.0 NP
Backing Thickness (Imperial) 0.0 NP
Bond Type Resin
Center Hole Diameter (Imperial) 0.0 NP
Center Hole Diameter (Metric) 0.0 NP
Color Family Red
For Use On Aluminum
Grit 60+
Product Color Maroon
Product Number 782C
Product Type simple
Quantity 0
Trademark 1 3M™
Country of Origin United States
Sales Unit EA
SAP Shelf Life In Days 3650
Base - Billing Unit EA
Base - Customary Width Dimension 4.5 INCH
Base - Metric Gross Weight 28.67 G
Base - Metric Width Dimension 0.114 M
Base - Item Quantity 1
Base - Unit EA
Unit of Use - Billing Unit EA
Unit of Use - Customary Cubic Dimension 10.06238823501269 ci
Unit of Use - Customary Gross Weight 0.0632065305684044 lbs
Unit of Use - Customary Net Weight 0.047994634477647846 lbs
Unit of Use - Metric Cubic Dimension 164.893 CCM
Unit of Use - Metric Net Weight 21.77 G
Unit of Use - Item Quantity 1
Unit of Use - Total Unit Quantity 1
Unit of Use - Previous Packaging Level Quantity 1
Unit of Use - Item Unit EACH
Unit of Use - Unit EA
Inner - Billing Unit EA
Inner - Customary Cubic Dimension 684.567778584376 ci
Inner - Customary Gross Weight 1.3448197993277533 lbs
Inner - Customary Net Weight 1.1998658619411962 lbs
Inner - Customary Height Dimension 13.26771653543307 in
Inner - Customary Length Dimension 4.488188976377953 in
Inner - Customary Width Dimension 11.496062992125983 in
Inner - Metric Cubic Dimension 11218.056 CCM
Inner - Metric Net Weight 544.25 G
Inner - Metric Height Dimension 33.7 CM
Inner - Metric Length Dimension 11.4 CM
Inner - Metric Width Dimension 29.2 CM
Inner - Item Quantity 25
Inner - Total Unit Quantity 25
Inner - Previous Packaging Level Quantity 25
Inner - Item Unit EACH
Inner - Previous Packaging Level Unit EACH
Inner - Unit BAG
Shipper - Billing Unit EA
Shipper - Customary Cubic Dimension 1006.2400439761509 ci
Shipper - Customary Gross Weight 6.32065305684044 lbs
Shipper - Customary Net Weight 4.799463447764785 lbs
Shipper - Customary Height Dimension 6.968503937007874 in
Shipper - Customary Length Dimension 21.5748031496063 in
Shipper - Customary Width Dimension 6.692913385826771 in
Shipper - Metric Cubic Dimension 16489.32 CCM
Shipper - Metric Weight 2.867 KG
Shipper - Metric Net Weight 2.177 KG
Shipper - Metric Height Dimension 17.7 CM
Shipper - Metric Length Dimension 54.8 CM
Shipper - Metric Width Dimension 17.0 CM
Shipper - Item Quantity 100
Shipper - Total Unit Quantity 100
Shipper - Previous Packaging Level Quantity 4
Shipper - Previous Packaging Level Unit BAG
Shipper - Item Unit EACH
Shipper - Unit CS
Pallet - Billing Unit EA
Pallet - Customary Cubic Dimension 94159.63713817191 ci
Pallet - Customary Gross Weight 491.00032260242824 lbs
Pallet - Customary Net Weight 345.5613682390645 lbs
Pallet - Customary Height Dimension 46.69291338582677 in
Pallet - Customary Length Dimension 47.99212598425197 in
Pallet - Customary Width Dimension 42.00787401574803 in
Pallet - Metric Cubic Dimension 1.543 M3
Pallet - Metric Net Weight 156.744 KG
Pallet - Metric Height Dimension 1.186 M
Pallet - Metric Length Dimension 1.219 M
Pallet - Metric Width Dimension 1.067 M
Pallet - Item Quantity 7200
Pallet - Total Unit Quantity 7200
Pallet - Previous Packaging Level Quantity 72
Pallet - Previous Packaging Level Unit BOX
Pallet - Item Unit EACH
Pallet - Unit PAL
Pallet - Pallet Layer Quantity 6
Pallet - Shipping Container Per Layer Quantity 12
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