UNMOUNTED FLAP WHEELS | AA ABRASIVES

Unmounted Flap Wheels are used for cleaning, blending, deburring and finishing on metal surfaces. AA Abrasives Unmounted Flap Wheels are made of quality Aluminum Oxide grain to provide consistent finishes.  Unmounted Flap Wheels in diameters from 3-1/2" to 12" are available on our website. Safe maximum RPM ratings are indicated on each flap wheel. 

Unmounted Flap Wheels

Choose your abrasive flap wheel in the appropriate grit to achieve the desired finish:

Unmounted Flap Wheels

Size	Max RPM	40 Grit	50 Grit	60 Grit	80 Grit	100 Grit	120 Grit	150 Grit	180 Grit	240 Grit
6 x 1 x 1	6,000	11154	11158	11162	11166	11170	11174	11176	11178	11182
6 x 1½ x 1	6,000	11190	11194	11198	11202	11206	11210		11214	11218
6 x 2 x 1	6,000	11226	11230	11234	11238		11242		11246	11250

Click on the part number above for product details and ordering information.
Other sizes and specs available - Visit our website for all Unmounted Flap Wheels
Also available Mounted Flap Wheels with 1/4" Shank and Mounted Flap Wheels with 1/4"-20 stem
Get a Quote for special make or bulk orders.

These Unmounted Flap Wheels are designed for use on slow speed straight grinders like the 4500 RPM - .7 hp Dynabrade 13207 Dynastraight or bench grinders.

The Dynabrade 13508 Dynastraight 4500 RPM - 1 hp has more horsepower, use with a slower RPM for a finer finish.

AA Abrasives is an Authorized Dynabrade Distributor.

Visit us at 

www.aaabrasives.com 

Or Call to Speak to an Industrial Abrasives Specialist 

1-800-888-1802

HOW TO READ A GRINDING WHEEL SPEC

The Measurement of a Grinding Wheel

Diameter of grinding wheel x Thickness of grinding wheel x size of arbor hole -

We will reference the AA Abrasives #60397 - 12x2x1-1/4 Pedestal Grinding Wheel T-1 Vitrified A36 - from our Vitrified Bonded Grinding Wheel Series.

12=Diameter x 2=Thickness x 1-1/4=Arbor Hole

*Note that the arbor hole can be bushed down meaning a bushing may be inserted in the arbor hole to reduce the size of the arbor hole.

Pedestal Grinding Wheel

What does the rest of the description mean after the size?

T-1 means the grinding wheel is flat. This is also referred to as a Type 1 Grinding Wheel or a straight toolroom wheel;

Vitrified is the bonding of grinding wheel;

A36 - A means it is an aluminum oxide grinding wheel and the 36 means the grinding wheel is composed of a medium grain size also known as grit.  See the grain size chart below.

A/O  also means aluminum oxide;

RPM is the Revolutions Per Minute or Maximum Operating Speed  - not all specifications will show this. The tool, the grinding wheel and application must be in agreement to ensure safe operation.

Grinding Wheel Specification Sheet

Grain Size/Grit:

Coarse: 8, 10, 12, 14, 18, 20, 24

Medium: 30, 36, 46, 54, 60

Fine: 80, 100, 120, 150, 180

Grade:

Soft: B, D, E, F, G, H

Med:  I, J, K, L, M, N

Hard: O, P, Q, R, S, T

Bond:

V- Vitrified

B- Resin

B2: Resin Bonded

BF: Reinforced Resin

Grain Types:

A- Dark Aluminum Oxide – Most common grain. Used for Heavy Duty General Purpose

AS3- 20% Ceramic Aluminum Oxide, 30% Pink Grain, 50% White Grain. Excellent for form and corner holding.

AZ- Blue Aluminum Oxide- Grinds fast with excellent cool cutting action and requires minimal dressing.

RA- Red Aluminum Oxide (Ruby)- Harder grain and sharper than PA & AZ wheels good for steels with high level chromium

PA- Pink Aluminum Oxide- General Purpose Grain that is tough but friable. Tool Room sharpening applications.

WA- White Aluminum Oxide- Highly friable grain for fast cool cutting. Good for light grinding on all steels particularly on tool and die steels.

GC- Green Silicon Carbide- very friable use for carbide grinding applications.

AA Abrasives carries its own line of Grinding Wheels.  We are also an authorized distributor of Norton Grinding Wheels. 

Visit our webstore to view our full line of abrasives and industrial power tools.

aaabrasives.com

Our webstore is open 24/7.

We are available by phone M-F 8:30 - 5 EST

1-800-888-1802

WHAT IS AN ABRASIVE FLAP DISC?

An abrasive flap disc can help you grind and finish metal surfaces with one tool attachment. Flap discs grind like a depressed center wheel and finish like a fiber sanding disc – helping you reduce process time and lower your total grinding costs.  

Technically speaking, Type 27 Flat flap discs have a flat flap design and provide the best finish. These tend to be the most popular and commonly used. Type 27 Flap Discs are used primarily on flat surfaces they grind at flatter angles 0° to 15°.

Type 29 Conical flap discs are the more aggressive choice, with flaps angled at 10°. The angle provides greater surface contact. A Type 29 flap disc can be used on both irregular and flat surfaces and grinds at steep angles 15° to 25°.

Choose an angled flap disc-Type 29 for faster stock removal. An angled edge can be used with a vertical or horizontal grinder. And with the angled edge, more of the abrasive disc contacts the metal surface, helping you strip and finish in less time.

Flap discs are most commonly used on right angle grinders and vertical shaft portable grinders. You may be using a tool like the Metabo Angle Grinder W8-115 or a Dynabrade 53232 Vertical Depressed Center Wheel Grinder.

We only offer high quality flap discs because we have found that poor quality flap discs on the market tend to “chatter” during the grinding process and generate vibrations.  This can result in the grit pulling away from the mounting prematurely giving you irregular grinding, poor grinding capacity, short service life and potential flap tearing. AA Abrasives Flap Discs are made with premium zirconia alumina grain on a phenolic backing.  Zirconia-alumina is best for medium- to heavy-material removal. The grains constantly fracture to produce new sharp edges. Flap discs made from zirconia-alumina are commonly used on carbon steels, aerospace alloys, nickel alloys, aluminum, cast iron, forgings and some stainless steels. These flap discs are made in the USA.

If you use flap discs - try our high quality flap disc line.  Our most popular flap discs are the Zirconium in 4-1/2" and 7" with a 7/8" arbor hole. 

AA Abrasives Zirk Flap Discs with 7/8" Arbor Hole

51417 - Flap Discs 4-1/2" x 7/8" Type 27 TruZirk 36 Grit

51435 - Flap Discs 4-1/2" x 7/8" Type 27 TruZirk 60 Grit

51441 - Flap Discs 4-1/2" x 7/8" Type 27 TruZirk 80 Grit

51501 - Flap Discs 7" x 7/8" Type 27 TruZirk 36 Grit

51519 - Flap Discs 7" x 7/8" Type 27 TruZirk 60 Grit

51525 - Flap Discs 7" x 7/8" Type 27 TruZirk 80 Grit

51155 - Flap Discs 4-1/2" x 7/8" Type 29 Zirk 36 Grit

51173 - Flap Discs 4-1/2" x 7/8" Type 29 Zirk 60 Grit

51179 - Flap Discs 4-1/2" x 7/8" Type 29 Zirk 80 Grit

51239 - Flap Discs 7" x 7/8" Type 29 Zirk 36 Grit

51257 - Flap Discs 7" x 7/8" Type 29 Zirk 60 Grit

51263 - Flap Discs 7" x 7/8" Type 29 Zirk 80 Grit

A 5/8"-11 arbor hole on a flap disc offers quick mounting and unmounting on angle grinders. If you have need for flap discs with a 5/8-11 arbor hole

AA Abrasives Zirc Flap Discs with a 5/8"-11 Arbor Hole

52381 - Flap Discs 4-1/2" x 5/8-11 Type 27 Zirc 36 Grit

52399 - Flap Discs 4-1/2" x 5/8-11 Type 27 Zirc 60 Grit

52465 - Flap Discs 7" x 5/8-11 Type 27 Zirc 36 Grit

52483 - Flap Discs 7" x 5/8-11 Type 27 Zirc 60 Grit

52161 - Flap Discs 4-1/2" x 5/8-11 Type 29 Zirc 36 Grit

52179 - Flap Discs 4-1/2" x 5/8-11 Type 29 Zirc 60 Grit

52185 - Flap Discs 4-1/2" x 5/8-11 Type 29 Zirc 80 Grit

52245 - Flap Discs 7" x 5/8-11 Type 29 Zirc 36 Grit

52263 - Flap Discs 7" x 5/8-11 Type 29 Zirc 60 Grit

We also offer Premium Ceramic Flap Discs if needed. 

www.aaabrasives.com

Our webstore is open 24/7.

We are available by phone M-F 8:30 - 5 EST

1-800-888-1802