Abrasive flap disc product guide, specifications, applications and wholesale ordering information
Angle Grinder Abrasives · Product & Buyer Guide
Abrasive Flap Discs for Grinding & Finishing — 100–180 mm, 40–120 Grit
Abrasive flap discs combine stock removal, weld blending and surface finishing on an angle grinder. Available configurations cover 100, 115, 125, 150 and 180 mm diameters with 40, 60, 80 and 120 grit options for metal fabrication, maintenance, coating preparation and selected woodworking tasks.
40 / 60 / 80 / 120 grit100–180 mm diameters16 mm or 22 mm boreFiberglass or plastic backingOEM labelling & packaging
What is an abrasive flap disc?
An abrasive flap disc is made from overlapping pieces of coated abrasive cloth fixed to a backing plate. As the outer edges wear, fresh abrasive is gradually exposed. This construction allows one disc to perform several operations—including grinding, deburring and blending—while producing a more controlled finish than a rigid grinding wheel in many fabrication tasks.
Flap discs are fitted to compatible angle grinders. A Type 27 flat profile is generally selected for broad, flat surfaces and lower working angles, while a Type 29 conical profile is often chosen for faster stock removal, edges and weld seams. Confirm the required profile, abrasive grain and backing type before ordering.
Product features
Multiple grinding stages
Four grit choices support coarse removal, deburring, weld blending and final surface preparation.
Controlled surface contact
Overlapping abrasive flaps conform better than a rigid wheel during blending and contour work.
Two backing options
Fiberglass backing offers rigidity; plastic backing can provide more flexibility for finishing applications.
Common grinder sizes
Diameters from 100 to 180 mm cover compact, standard and larger angle-grinder formats.
Bulk export packing
Standard carton quantities are listed below to support distributors, workshops and industrial buyers.
OEM order support
Private labels, grit combinations and carton requirements can be discussed for confirmed orders.
How to choose the right flap disc
Match the disc to the workpiece, removal rate and finish required. The table below provides a practical starting point; final performance also depends on abrasive grain, grinder speed, contact angle and operator pressure.
| Grit | Cutting action | Typical applications | Finish level |
|---|
| 40 grit | Aggressive | Heavy rust, paint or scale removal; rapid weld reduction; rough shaping | Coarse scratch pattern |
| 60 grit | Medium-coarse | General stock removal, deburring and surface preparation | Balanced cut and control |
| 80 grit | Medium-fine | Weld blending, light deburring and preparation before coating | Smoother blended surface |
| 120 grit | Fine | Final blending, scratch refinement and light finishing | Fine preparation finish |
Material confirmation: State whether the disc will be used on carbon steel, stainless steel, aluminium, wood or another material. The suitable abrasive grain and contamination requirements may differ by workpiece.
Standard sizes, grits and packaging
The following table reflects the supplied standard configurations. Before placing an order, confirm the disc profile, abrasive grain, backing plate, maximum RPM, bore tolerance and packing marks.
| Diameter × Bore | Available grits | Quantity / carton | Carton size (cm) |
|---|
| 100 × 16 mm | 406080120 | 300 pcs | 41 × 31 × 23 |
| 115 × 22 mm | 406080120 | 300 pcs | 59 × 24 × 23 |
| 125 × 22 mm | 406080120 | 300 pcs | 64 × 28 × 26 |
| 150 × 22 mm | 406080120 | 150 pcs | 31 × 31 × 27 |
| 180 × 22 mm | 406080120 | 150 pcs | 37 × 37 × 29 |
Working speed: supplied product information states up to 72 m/s. The permitted RPM varies with disc diameter and must be confirmed from the product label and order specification. Never operate a disc above its marked maximum speed.
Recommended applications
Weld grinding
Reduce weld beads and spatter before progressing to a finer grit for blending.
Deburring edges
Remove burrs after cutting, punching or fabrication with better control than aggressive rigid grinding.
Rust and coating removal
Strip corrosion, old paint and surface contamination before repair or recoating.
Surface blending
Blend grinding marks and weld transitions to create a more uniform surface.
Coating preparation
Prepare metal surfaces for primer, paint or other finishing processes using the appropriate grit.
Selected woodworking
Use suitable grit and light pressure for shaping or sanding wood; test first to prevent gouging.
Information to confirm for a wholesale or OEM quotation
1. Size and bore
Disc diameter, centre-hole size and grinder model or spindle specification.
2. Grit and material
Required grit plus the workpiece: carbon steel, stainless steel, aluminium, wood or other material.
3. Construction
Abrasive grain, Type 27 or Type 29 profile, and fiberglass or plastic backing.
4. Quantity and packing
Order quantity per grit, OEM label requirements, inner-box packing and shipping marks.
5. Trade terms
Destination port, FOB or CIF request, delivery schedule and any sample requirement.
6. Compliance details
Required product marking, maximum RPM, test documents or market-specific standards.
Safe use of abrasive flap discs
Confirm that the disc diameter, bore and maximum RPM match the angle grinder.
Inspect the backing plate and abrasive flaps before use; do not use a damaged or distorted disc.
Use the grinder guard and appropriate eye, face, hearing, hand and respiratory protection.
Allow the tool to reach operating speed before contacting the workpiece, and avoid excessive pressure.
Use the working angle recommended for the disc profile and keep the tool moving to limit heat build-up.
Follow the product label, grinder manual and applicable workplace safety requirements.
Frequently asked questions
Which flap disc grit should I use for weld grinding?+Use 40 or 60 grit when the priority is rapid weld reduction. Move to 80 grit for blending and 120 grit for finer scratch refinement. The best sequence depends on the weld size, base material and required final finish.
What is the difference between Type 27 and Type 29 flap discs?+Type 27 has a flatter face and is commonly used at a lower angle on flat surfaces and for blending. Type 29 has a conical shape that concentrates contact for stock removal, edge work and weld seams. Confirm the available profile before ordering.
Can one flap disc both grind and finish?+A flap disc can remove stock and leave a more blended surface than a rigid grinding wheel, but the finish depends on grit. Heavy grinding and fine finishing normally require two or more grit stages.
Are these flap discs suitable for stainless steel or aluminium?+Suitability depends on the abrasive grain, workpiece and contamination requirements. Tell us the exact material so the correct product configuration can be confirmed. Use moderate pressure and control heat when working on aluminium.
How do I confirm the safe RPM for a flap disc?+Check the maximum RPM marked on the disc and compare it with the no-load speed of the grinder. The grinder must not exceed the disc rating. Because permitted RPM changes with diameter, do not rely on surface speed alone.
Can you supply OEM flap discs for distributors?+OEM options can include private labels, selected grit combinations and customised packing. Send the required size, grit, backing, quantity, destination and packaging details so MOQ, lead time and quotation can be confirmed.
Request an abrasive flap disc quotation
Send the size, grit, workpiece material, quantity and destination port. We can then confirm the suitable construction, packing, MOQ and trade price.
