GRiT.® Plastic Support Flap Disc

GRiT.® plastic-backed flap disc: high-performance grinding and finishing

The GRiT.® plastic-backed flap disc combines aggressive grinding and precise finishing in a single pass. The result: fewer tools, more efficiency.

Its flexible plastic backing conforms to surfaces and reduces vibration, ensuring precise work even on complex shapes.

Compatible with standard angle grinders, it is suitable for steel, stainless steel, and non-ferrous metals, a versatile disc for demanding professionals.

What is the GRiT.® plastic-backed flap disc?

The GRiT.® plastic-backed flap disc is a rotary abrasive designed for grinding and finishing on metal, stainless steel, and composite materials. It is distinguished by its thermoformed plastic backing, which is lighter and more rigid than a traditional fiber backing.

The abrasive flaps are arranged in a fan shape and attached to this backing. They work smoothly while maintaining constant aggressiveness throughout the life of the disc.

Plastic backing technology: design and structural benefits

The plastic backing replaces the traditional vulcanized fiber backing. It offers better moisture resistance and does not deform under the heat generated by abrasion.

This structural rigidity allows for a more stable angle of attack on the workpiece. The result: less vibration, better handling, and a more uniform finish.

At Dagobert Industrie, we offer GRiT.® discs in several grits to cover all applications:

• Coarse grits (P40, P60): rapid material removal, welds, chamfering
• Medium grits (P80, P120): roughing and surface leveling
• Fine grits (P180, P240): finishing, preparation before surface treatment

Product	Backing	Moisture resistance	Vibration	Typical usage
GRiT.® plastic backing	Thermoformed plastic	Excellent	Very low	Stainless steel, metals, composites
Fiber-backed flap disc (standard)	Vulcanized fiber	Average	Moderate	Steel, common metal
Aluminum-backed flap disc	Aluminum	Excellent	Low	Heavy-duty work, production

Technical specifications of the GRiT.® plastic-backed flap disc

The GRiT.® plastic-backed flap disc is characterized by its flexible plastic backing, which is lighter than a fiber or metal backing.

This flexibility allows for optimal contact with curved and irregular surfaces. Result: less vibration, better handling, more precise work.

The abrasive flaps are arranged in a fan and glued to the backing. They wear down gradually, always exposing a fresh abrasive surface, which guarantees constant cutting throughout the life of the disc.

Available grit: from P40 (aggressive roughing) to P120 (smooth finishing). The choice of grit depends on the material and the desired surface finish.

• Backing: flexible plastic (PA or polypropylene depending on the reference)
• Abrasive: zirconia alumina or aluminum oxide depending on the grit
• Common diameter: 115 mm, 125 mm, 180 mm
• Usage angle: 0° to 15° (angle grinder)
• Attachment: standard centered bore M14

Criterion	GRiT.® plastic backing	Fiber-backed flap disc (standard)	Metal-backed flap disc
Flexibility	High	Average	Low
Weight	Light	Average	Heavy
Curved surfaces	Excellent	Fair	Limited
Durability	Good	Good	Very good
Finish obtained	Smooth to very smooth	Average to smooth	Rough to average
Typical usage	Finishing, stainless steel, aluminum, profiled surfaces	General steel grinding	Intensive roughing

The plastic backing is particularly suitable for working with stainless steel, aluminum, and heat-sensitive materials or those prone to deep scratches.

At Dagobert Industrie, we offer GRiT.® references to cover all needs, from roughing to refined finishing.

Applications: materials and tasks compatible with the GRiT.® flap disc

The GRiT.® plastic-backed flap disc is suitable for a wide range of materials and tasks. Its flexible plastic backing provides optimal contact with the surface, even on complex geometries.

Steel, stainless steel, and non-ferrous metals: performance based on grit

On unalloyed steel and stainless steel, this disc excels at deburring, edge grinding, and finishing welds. The grit directly influences the result obtained.

• Grit 40-60: rapid material removal, deburring, removal of raised welds
• Grit 80-120: grinding, surface preparation before painting or coating
• Grit 120-180: fine finishing, satin finishing, preparation before polishing

On aluminum and non-ferrous metals, the plastic backing reduces the risk of clogging compared to a fiber backing. The cut remains clean and regular throughout the life of the disc.

The GRiT.® flap disc is also suitable for working on cast iron, copper, and brass, provided the grit is adapted to the desired level of finish.

Product	Backing	Recommended materials	Key strength
GRiT.® plastic backing	Flexible plastic	Steel, stainless steel, aluminum, non-ferrous metals	Flexibility, anti-clogging, regular finish
Fiber-backed flap disc (standard)	Rigid fiber	Steel, stainless steel	Rigidity, aggressive material removal
Fiber-backed flap disc (e.g., Klingspor SMT 626)	Reinforced fiber	Steel, cast iron	Heat resistance, longevity on hard steel

Comparison: GRiT.® plastic-backed flap disc versus other flap discs on the market

Not all flap discs are created equal. The backing makes all the difference between a rigid disc that gouges and a disc that follows the material.

The GRiT.® flap disc uses a fibrous plastic backing. Unlike the classic fiberglass backing, it offers better flexibility and increased resistance to moisture and cutting oils.

Criterion	GRiT.® plastic backing	Fiber-backed flap disc (standard)	Steel-backed flap disc (e.g., Klingspor SMT 800)
Flexibility	High	Average	Low
Moisture resistance	Excellent	Low to average	Good
Finish obtained	Smooth, regular	Fair	Fair to good
Material removal rate	Average to high	Average	High
Adaptation to complex shapes	Very good	Average	Limited
Typical usages	Grinding, finishing, stainless steel, aluminum	General steel grinding	Intensive steel grinding

The GRiT.® plastic backing is particularly suitable for sensitive materials: stainless steel, aluminum, titanium. It avoids cross-contamination and does not leave ferrous residue.

Compared to a classic fiber-backed disc, the GRiT.® lasts longer during finishing work. The grit remains active for a longer time thanks to an optimized resin bond.

In summary: if you are looking for a versatile disc for grinding and finishing noble metals, the GRiT.® plastic backing clearly has the advantage over standard solutions on the market.

Usage and safety tips for the GRiT.® flap disc

The GRiT.® flap disc offers excellent results, provided that a few simple rules are followed. Incorrect settings or an inappropriate machine can compromise the finish and reduce the disc's lifespan.

Compatible machines and recommended settings

The GRiT.® flap disc is designed for use on an angle grinder. Always verify that the maximum speed marked on the disc is greater than or equal to the speed of your machine.

Strictly observe the indicated maximum peripheral speed (usually 80 m/s). Exceeding this exposes the operator to the risk of the disc shattering.

For the GRiT.® plastic backing, the ideal working angle is between 10° and 30° relative to the surface. This ensures optimal contact of the flaps and uniform wear.

• Use a clamping nut adapted to the shaft diameter (standard M14).
• Always mount the required safety guard before turning on the tool.
• Avoid excessive pressure: let the abrasive grit do the work.
• Always wear safety glasses, gloves, and hearing protection.
• Inspect the disc before each use: no cracks or loose flaps should be visible.

The plastic backing of the GRiT.® presents a key advantage over classic fiber backings: it offers better flexibility and absorbs vibrations better, which reduces operator fatigue during long sessions.

Store the discs away from moisture and impacts. A poorly stored disc loses its abrasive properties and can become dangerous to use.

FAQ - GRiT.® plastic-backed flap disc

1. What is the difference between a plastic-backed flap disc and a fiber-backed flap disc?

The plastic backing offers significantly higher flexibility than the fiber backing. It conforms better to shapes, making it ideal for curved or irregular surfaces.

The fiber backing is more rigid: it is more suitable for aggressive material removal on flat surfaces. Plastic, on the other hand, prioritizes work comfort and finish quality.

2. On which materials can the GRiT.® flap disc be used?

The GRiT.® flap disc can be used on a wide range of materials: steel, stainless steel, aluminum, non-ferrous metals, and depending on the grit, certain composite materials.

Its abrasive is selected so as not to contaminate sensitive surfaces like stainless steel. There is no risk of rust or unwanted particle transfer.

3. Which grit should be chosen according to the type of work?

Here is a quick guide:

• Grit 40-60: roughing, weld removal, removing large burrs.
• Grit 80: intermediate grinding, surface preparation before finishing.
• Grit 120: fine finishing, surface smoothing, preparation before painting or treatment.
• Grit 180-240: satin finishing on stainless steel or aluminum.

As a general rule: the lower the grit, the more material it removes. The higher the grit, the more refined the finish.

4. Is the GRiT.® plastic-backed flap disc compatible with all angle grinders?

Yes. The GRiT.® disc is designed to fit standard angle grinders with an M14 mounting plate. It is available in 115 mm and 125 mm diameters, the two most common formats on the market.

Simply check that your grinder accepts the maximum speed indicated on the disc. This is a basic safety precaution, regardless of the tool brand.

5. What is the lifespan of a GRiT.® flap disc compared to a standard disc?

A flap disc lasts on average 3 to 5 times longer than a standard abrasive disc such as a cutting disc or thick grinding disc. The flaps renew themselves as they wear.

At Dagobert Industrie, we have found that GRiT.® discs hold up particularly well thanks to the quality of their abrasive and the strength of the plastic backing. Fewer tool changes, more productivity.

6. Can this disc be used for finishing and satin finishing on stainless steel?

Yes, that is actually one of the key strengths of the GRiT.® flap disc. With a fine grit (120 to 240), it allows for a uniform satin finish on stainless steel without deep scratches or surface contamination.

For a clean directional satin finish, always work in the same direction and progress by increasing the grit. The flexible plastic backing facilitates work on stainless steel angles and complex shapes.