AMC 2026 catalogue

Abrasives

Flap Discs

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ABRASIVES

Flap Disc Specifications

NRN99213

General Purpose Flap Discs High density flap discs feature larger flaps to improve conformity on uneven or contoured surfaces. Aluminum oxide abrasive material with fiberglass backing.

Disc Dia. Mounting Size Backing Material Max. RPM Grit Disc Type

Item

No.

4 1⁄2 in

5/8/11 Cotton 13,300 RPM 80 Type 27 NRN99002 5/8/11 Cotton 13,300 RPM P60 Type 27 NRN99001 5/8/11 Cotton 13,300 RPM P60 Type 27 NRN99060 7⁄8" Cotton 13,300 RPM P36 Type 27 NRN99126 7⁄8" Cotton 13,300 RPM P40 Type 27 NRN99004 7⁄8" Plastic 13,300 RPM 60 Type 27 NRN99005 7⁄8" Plastic 13,300 RPM 80 Type 27 NRN99006 7⁄8" Plastic 13,300 RPM 120 Type 27 NRN99007

5 in

5/8/11 Cotton 12,000 RPM P60 Type 27 NRN99130 5/8/11 Cotton 12,000 RPM P80 Type 27 NRN99131 7⁄8" Cotton 12,000 RPM 40 Type 27 NRN99008 7⁄8" Cotton 12,000 RPM P36 Type 27 NRN99133 7⁄8" Cotton 12,000 RPM P40 Type 27 NRN99212 7⁄8" Cotton 12,000 RPM P60 Type 27 NRN99213 7⁄8" Cotton 12,000 RPM P80 Type 27 NRN99010 7⁄8" Plastic 12,000 RPM 60 Type 27 NRN99009

6 in

5/8/11 Cotton 10,200 RPM P80 Type 27 NRN99221 7⁄8" Cotton 10,200 RPM P40 Type 27 NRN99012 7⁄8" Cotton 10,200 RPM P40 Type 27 NRN99216 7⁄8" Cotton 10,200 RPM P60 Type 27 NRN99217

NORTON

WHY CHOOSE A FLAP DISC? Flap Discs can replace both grinding wheels and fiber discs. The same flap disc can be used for applications ranging from stock removal to blending.

Flap Discs vs. Grinding Wheels Flap Discs vs. Fiber Discs Faster stock removal Longer life, reduced abrasive cost Smoother finish with no gouging Fewer disc changes for reduced cost Cooler cutting, less glazing More consistent finish Lightweight and easier to control No back-up pad required Less vibration for reduced operator fatigue Easier storage with no curling Reduced noise Reduced loading Grit is coarser size

FLAP DISC SHAPES Type 27 Flat Type 29 Conical Grind at flatter angles 0° to 15° Grind at steeper angles 15° to 25° Used primarily on flat surfaces Have angled flaps and may be used on both contoured and edge work Best choice for blending and smooth finishing Angle provides greater surface contact for stock removal on flat surfaces Best choice when speed and stock removal are primary considerations

GRAIN SELECTION Abrasive Grain Type Application Ceramic - High Performance High cut rate and long life on stainless, aluminum and other hard-to-grind materials Zirconia Alumina - Heavy Duty High rate of stock removal and long life in demanding applications Aluminum Oxide - General Purpose General purpose metalworking applications

GRIT GUIDE Coarser for Grinding Finer for Finishing 24 36 40 50 60 80 100 120 Stock Removal

Edge Chamfering/Beveling

Weld Blending

Deburring/Deflashing

Rust Removal/Blending

Cleaning and Finishing

BACKING PLATE MATERIALS Flap discs are a combination of abrasive flaps adhered to a rigid backing plate. The backing plate provides stability during operation.

Backing Material Advantages Fiberglass High strength and lightweight; helps to absorb vibration Plastic Offers some conformability and is trimmable Aluminum Rigid support for maximum aggression; recyclable Composite Trimmable, non-marking; allows access at hard-to-reach angles Phenolic Prevents backing from scratching the workpiece