10 products
Flap & Preparation Discs
flap-preparation-discs
TIMCO Set of Nylon Stripping & Preparation Discs - 115 x 22.23 (10pcs)
- Pack quantity
- 10 Pieces
- Price
- £54.01Incl. VAT
TIMCO Set of Flap Discs Zirconium Type 29 Conical P120 Grit - 115 x 22.23 (10pcs)
- Pack quantity
- 10 Pieces
- Price
- £18.00Incl. VAT
TIMCO Flap Disc Zirconium Type 29 Conical P120 Grit - 115 x 22.23
- Pack quantity
- 1 Each
- Price
- £2.26Incl. VAT
TIMCO Set of Flap Discs Zirconium Type 29 Conical P80 Grit - 115 x 22.23 (10pcs)
- Pack quantity
- 10 Pieces
- Price
- £18.00Incl. VAT
TIMCO Flap Disc Zirconium Type 29 Conical P80 Grit - 115 x 22.23
- Pack quantity
- 1 Each
- Price
- £2.26Incl. VAT
TIMCO Set of Flap Discs Zirconium Type 29 Conical P60 Grit - 115 x 22.23 (10pcs)
- Pack quantity
- 10 Pieces
- Price
- £18.00Incl. VAT
TIMCO Flap Disc Zirconium Type 29 Conical P60 Grit - 115 x 22.23
- Pack quantity
- 1 Each
- Price
- £2.26Incl. VAT
TIMCO Set of Flap Discs Zirconium Type 29 Conical P40 Grit - 115 x 22.23 (10pcs)
- Pack quantity
- 10 Pieces
- Price
- £18.00Incl. VAT
TIMCO Flap Disc Zirconium Type 29 Conical P40 Grit - 115 x 22.23
- Pack quantity
- 1 Each
- Price
- £2.26Incl. VAT
Flap & Preparation Discs for Grinders and Power Tools
A poor abrasive disc wastes time and leaves a rough finish. Flap discs and preparation discs cut faster and last longer. You get a cleaner result with less effort. Here you will find quality flap discs for angle grinders and preparation discs for surface work. Brands include Abracs and other trusted trade names. Suitable for metal, steel, stainless steel, and wood surfaces. All products are available in practical sizes and grit grades for UK trade and DIY use.
Why Flap Discs and Preparation Discs Matter
Grinding and surface preparation are essential steps on any job. Using the wrong abrasive disc slows you down. It can also damage the surface or leave marks that are hard to remove.
Flap discs combine grinding and finishing in one disc. They remove material and smooth the surface at the same time. Preparation discs are built to clean, strip, and prepare surfaces quickly. Together, they cover the full range of surface prep tasks.
This range includes Abracs flap discs and other reliable brands. You will find standard flap discs, quick-change prep discs, and surface conditioning discs. Sizes and grit grades are available to suit most angle grinders used across the UK.
Quick tip: Always match the disc diameter to your grinder's rated size. Using a larger disc than rated is a serious safety risk. Check the maximum RPM of the disc against your grinder's no-load speed before use.
Types of Flap Discs and Preparation Discs
Different disc types suit different tasks. Here is a plain guide to what each type does and when to use it.
Standard Flap Discs
Standard flap discs are used on angle grinders for grinding and blending. They have overlapping abrasive flaps bonded to a fibre or plastic backing plate. As the top layer wears, a fresh layer is exposed. This gives a longer working life than a standard grinding disc. Available in T27 (flat) and T29 (angled) profiles.
Abracs Flap Discs
Abracs flap discs are a popular trade choice across the UK. They are built for consistent cut rate and long disc life. Abracs makes flap discs in zirconia and aluminium oxide grain. Zirconia grain cuts faster on hard metals. Aluminium oxide suits mild steel, wood, and softer materials.
Zirconia Flap Discs
Zirconia flap discs are designed for high-stock removal on tough metals. They are harder and sharper than standard aluminium oxide. Use them on stainless steel, hardened steel, and alloy metals. They stay sharp longer under pressure. A good choice when working with harder materials at high speed.
Aluminium Oxide Flap Discs
Aluminium oxide flap discs are a general-purpose abrasive. They work well on mild steel, wood, painted surfaces, and soft alloys. They cost less than zirconia discs. Ideal for light grinding, blending welds, and deburring edges. A very common disc type on UK sites and workshops.
Surface Conditioning Discs
Surface conditioning discs are non-woven abrasive discs. They clean, deburr, and finish without removing too much material. Use them before painting, coating, or bonding. They will not leave deep scratch marks on the surface. Available as quick-change discs or angle grinder pads.
Quick-Change Preparation Discs
Quick-change prep discs fit onto a mandrel with a simple click. No spanner or locking nut is needed. They swap in seconds, saving time when switching between tasks. Available in various grit grades and abrasive types. Popular for automotive bodywork, fabrication, and general metal prep.
Fibre Backing Flap Discs
Fibre backing plates are more rigid than plastic backing. They give better control on flat surfaces. T27 flat profile discs with fibre backing are well suited to flat grinding. They hold their shape well under sustained pressure.
Nylon Preparation Discs
Nylon abrasive preparation discs are used for rust removal and paint stripping. They are more flexible than fibre discs. They conform to curved and uneven surfaces. A useful disc for cleaning up old welds or removing surface coatings.
Grit Grade for Flap Discs
Grit grade controls how much material a disc removes. Lower numbers are coarser and remove material faster. Higher numbers are finer and give a smoother finish.
| Grit Grade | Cut Type | Best Use |
|---|---|---|
| P40 | Very coarse | Heavy stock removal, weld seam grinding |
| P60 | Coarse | Rust removal, surface levelling, rough shaping |
| P80 | Medium coarse | Blending welds, deburring, general metal prep |
| P120 | Medium | Smoothing and blending after coarse grinding |
| P180 | Fine | Pre-paint surface preparation, fine finishing |
| P240+ | Very fine | Final finish before coating or polishing |
For most metal grinding jobs, P40 to P80 grit is the most common choice. If you need a finish ready for paint or primer, work up to P120 or P180.
Good practice: Start with a coarser grit and work up. Trying to skip grits wastes time and discs. Each grit grade removes the scratch marks left by the previous one.
Picking the Right Flap Disc for Your Job
The right disc depends on what material you are working on and what result you need. Here is a simple guide to common tasks.
Grinding Welds on Mild Steel
Use a P40 or P60 zirconia or aluminium oxide flap disc. A T29 angled disc gives a better angle of attack on weld seams. Follow up with P80 or P120 to blend the surface smooth.
Working on Stainless Steel
Always use a flap disc rated for stainless steel. Zirconia grain is the correct abrasive for stainless. Iron-free and sulphur-free discs prevent contamination of the surface. Contamination causes rust spots on stainless after welding.
Paint and Rust Removal
Use a P40 or P60 flap disc for fast rust and paint removal. A nylon prep disc works well on curved or shaped surfaces. Surface conditioning discs give a cleaner result on thinner metals.
Surface Prep Before Painting
Start with a coarser disc to remove contamination. Finish with a P120 or P180 flap disc for a key for primer. Surface conditioning discs are also useful at this stage.
Wood Shaping and Sanding
Aluminium oxide flap discs work well on wood. They shape and smooth wood quickly on an angle grinder. Use P40 to P80 for shaping and P120 to P180 for finishing.
Deburring and Edge Work
A P80 or P120 flap disc removes sharp burrs from cut edges fast. For light deburring, a surface conditioning disc leaves a cleaner edge. Quick-change prep discs are handy for small parts and tight areas.
T27 vs T29 Flap Discs: What Is the Difference?
Flap discs come in two main profile shapes. Both fit standard angle grinders. The shape affects how the disc contacts the workpiece.
T27 (flat profile) discs have a flat face. They work best when used at a low angle of around 5 to 10 degrees. They give a larger contact area. This suits flat surface grinding and blending. T27 discs are also called Type 27 flap discs.
T29 (conical profile) discs have an angled, raised centre. They are designed to work at a higher angle of around 15 to 25 degrees. This concentrates pressure on the disc edge. T29 discs cut faster and are better for weld seam grinding and aggressive stock removal. They are also called Type 29 flap discs.
For most surface blending and finishing work, T27 is the standard choice. For weld grinding and faster metal removal, T29 gives better results.
Safety note: Never use a flap disc rated below your grinder's maximum RPM. Always fit the disc guard before use. Wear eye protection, gloves, and appropriate PPE at all times.
Common Flap Disc Sizes for Angle Grinders
Flap discs are made to fit standard angle grinder arbor sizes. The most common bore size for UK grinders is 22.23mm. Always check your grinder's disc size before ordering.
| Disc Diameter | Grinder Size | Common Use |
|---|---|---|
| 100mm (4 inch) | Small angle grinder | Light grinding, tight spaces, automotive work |
| 115mm (4.5 inch) | Standard angle grinder | Most common size for general metal grinding |
| 125mm (5 inch) | Standard angle grinder | General grinding, weld blending, surface prep |
| 150mm (6 inch) | Medium angle grinder | Faster stock removal on larger flat surfaces |
| 180mm (7 inch) | Large angle grinder | Heavy fabrication, structural steelwork |
| 230mm (9 inch) | Large angle grinder | High-volume grinding, large flat areas |
The 115mm and 125mm sizes are the most widely used across UK fabrication and trade work. They suit the most common angle grinder models available in the UK market.
Find the Right Flap or Preparation Disc for Your Work
Use the filters above to narrow by disc size, grit grade, and abrasive type. Check individual product pages for maximum RPM, material suitability, and pack sizes before ordering.
Whether you need an Abracs flap disc for angle grinder work on steel, a zirconia disc for stainless, a surface conditioning disc for prep work, or a quick-change preparation disc for automotive use, this range covers the most-used flap and preparation discs for trade and DIY use across the UK.
For cutting discs and grinding wheels, see our cutting discs and grinding wheels range. For surface finishing and polishing products, visit our abrasives section.
Frequently Asked Questions
What is a flap disc used for on an angle grinder?
A flap disc is used for grinding, blending, and finishing metal surfaces. It removes material and smooths the surface in one pass. It lasts longer than a standard grinding disc and leaves a better finish.
What grit flap disc should I use for grinding welds?
Use a P40 or P60 grit flap disc for grinding weld seams. Follow with P80 or P120 to blend and smooth the area. A T29 angled disc works best for weld grinding.
Can I use a flap disc on stainless steel?
Yes, but you must use a disc rated for stainless steel. Zirconia grain flap discs are the correct choice. The disc must be iron-free and sulphur-free to avoid contaminating the surface.
What is the difference between a flap disc and a grinding disc?
A grinding disc is a solid bonded abrasive wheel. A flap disc has overlapping abrasive flaps and lasts longer. Flap discs also give a smoother finish and create less vibration during use.
Are Abracs flap discs good quality?
Yes. Abracs is a well-regarded abrasives brand used widely in the UK trade. Abracs flap discs are known for consistent cut rate and reliable disc life. They are a popular choice among fabricators and metalworkers across the UK.
What size flap disc fits a standard UK angle grinder?
Most standard UK angle grinders take 115mm or 125mm flap discs. The standard bore size is 22.23mm. Always check your grinder's plate before buying.
What is a preparation disc used for?
Preparation discs are used to clean, strip, and prepare surfaces before painting or coating. They remove rust, old paint, and surface contamination. Surface conditioning prep discs leave a consistent key for primer or adhesive.
Can I use a flap disc on wood?
Yes. Aluminium oxide flap discs work well on wood. They shape and smooth wood quickly when fitted to an angle grinder. Use a coarser grit for shaping and a finer grit for finishing.
Related Abrasive Products
Flap discs are often used alongside other abrasive products. See our cutting discs and grinding wheels for metal cutting and heavy grinding.
For sanding sheets, belts, and rolls used in workshop finishing work, visit our abrasives range.