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Flap Disc Manufacturer
Rex manufactures T27 flat and T29 conical flap discs in diameters from 100 to 180 mm, with 5 abrasive grains, grits from P36 to P600 and fiberglass backing plates. Most output goes to overseas brands as OEM private label, and Rex also supplies wholesalers and industrial users in volume.
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Flap Disc Specifications
Arbor hole size follows the angle grinder standard of your target market. Please state it in your RFQ.
| Abrasive Grain | Grit | Shape | Diameter (mm) | Backing Plate |
|---|---|---|---|---|
| Aluminum oxide | P36–P600 | T27 / T29 | 100 / 115 / 125 / 150 / 180 | Fiberglass |
| Calcined aluminum oxide | P36–P400 | T27 / T29 | 100 / 115 / 125 / 150 / 180 | Fiberglass |
| Zirconia | P40–P120 | T27 / T29 | 100 / 115 / 125 / 150 / 180 | Fiberglass |
| Silicon carbide | P36–P600 | T27 / T29 | 100 / 115 / 125 / 150 / 180 | Fiberglass |
| Ceramic | Confirmed when quoting | T27 / T29 | Confirmed when quoting | Confirmed when quoting |
T27 or T29
T27 grinds flat against the workpiece. T29 works at an angle and concentrates pressure. A private label line usually needs both.
T27 flat
working angle of about 0–15°, wide contact area, suited to blending flat surfaces, edge dressing and finishing
T29 conical
working angle of about 15–25°, concentrated pressure, suited to weld grinding, chamfering and fast stock removal
Where Each of the 5 Abrasive Grains Fits
Aluminum oxide
general purpose for metal and non-metal, with the widest grit range, covering everything from stock removal to fine grinding
Calcined aluminum oxide
sharper and longer-lasting than standard aluminum oxide, suited to an upgrade tier
Zirconia
for grinding stainless steel, alloy steel and carbon steel; under pressure the grain fractures to expose new cutting edges
Silicon carbide
surface work on non-metals such as stone and glass
Ceramic
heat resistant and long-lasting. Rex rates its life at about 3–4 times that of standard flap discs (in suitable applications). It needs enough pressure to stay self-sharpening
Choosing Flap Discs by Workpiece
| Workpiece | Recommended Grain | Recommended Shape | Common Grits |
|---|---|---|---|
| Carbon steel | Zirconia, aluminum oxide | T29 for weld removal, T27 for blending | P40–P80 |
| Stainless steel | Zirconia, ceramic | T27 | P60–P120 |
| Aluminum and other non-ferrous metals | Aluminum oxide | T27 | P60–P120 |
| Wood | Aluminum oxide | T27 | P60–P120 |
| Stone, glass | Silicon carbide | T27 | Chosen by process step |
Flap Discs vs. Grinding Wheels vs. Mounted Flap Wheels
Many jobs that used grinding wheels can drop a blending step after switching to flap discs.
Flap discs
- abrasive cloth flaps stacked on a backing plate. Stock removal and blending are done in one step, with a smoother finish, less heat and less noise. Used on an angle grinder
Grinding wheels
- abrasive pressed into a solid body (bonded abrasive). They remove stock fast but leave a rough surface, so an extra blending step is needed
How Flap Discs Are Made
How well a flap disc performs depends mainly on even flap stacking and strong bonding. Rex’s production has 6 steps:
01. Cloth slitting
consistent flap width, no frayed edges
02. Gluing
controls glue amount and coverage, which decides whether flaps come loose
03. Flap stacking
controls flap count, angle and evenness, which decide cutting power, life and balance
04. Pressing
presses the flaps flat and tight to reduce vibration and uneven wear
05. Drying and curing
secures bond strength so flaps stay on under heat at high speed
06. Packing
labeling and speed marking, in bulk or retail packaging
Speed and Safety Marking
Every flap disc must be marked with its maximum speed, which depends on diameter. At the common peripheral speed of 80 m/s:
- 100 mm: 15,300 rpm
- 115 mm: 13,300 rpm
- 125 mm: 12,250 rpm
- 150 mm: 10,200 rpm
- 180 mm: 8,500 rpm
The angle grinder’s no-load speed must not exceed the speed marked on the disc. Coated abrasives for the European market follow the EN 13743 safety standard. Rex holds MPA certification (products covered as stated on the certificate).
Industries
Steel structures and metalworking
weld grinding, beveling, deburring
Stainless steel products
post-weld blending on kitchenware, pipes and tanks
Shipbuilding
weld finishing, rust removal
Automotive and machinery repair
rust removal, leveling, surface prep before painting
Stone processing
silicon carbide flap discs for stone and glass edges
Why Rex for Flap Discs
- Full range 5 abrasive grains × 2 shapes × 5 diameters, so a complete private label line can be made at Rex
- Samples before production samples are made to your specification or sample, and bulk production starts after you approve them
- Specifications on file flap stacking, printing and packaging are filed against the approved sample, so repeat orders stay consistent
- Safety certification MPA certification meets European customers' safety requirements for coated abrasives (products covered as stated on the certificate)
Private Label Options
- Backing plate printing brand logo, model, grit, speed and safety marks
- Labels your artwork, barcodes, multilingual versions
- Packaging bulk cartons, shrink wrap, retail color boxes, e-commerce multi-packs
- Density standard or high density, with flap count confirmed when quoting
Match the Flap Discs You Sell Now
Want to switch suppliers but worried your customers won’t like the change? Send Rex the flap discs you sell now:
- 1. Rex analyzes the abrasive grain, flap count and construction
- 2. Samples are made to the same specification
- 3. You test them side by side on the same angle grinder and the same workpiece
- 4. Bulk production starts after approval, and the specification is filed
Building a Private Label Flap Disc Line
If this is your first private label flap disc line, you can build it in three tiers, entry, core and premium, to cover customers at different price points:
- Entry: aluminum oxide, T27, common grits P40 / P60 / P80 / P120
- Core: zirconia, stocked in both T27 and T29, for steel and stainless steel
- Premium: ceramic, for industrial customers with heavy loads who value long life
- Sizes: start with the one or two most common diameters in your target market, then expand
Tell Rex your target market and positioning, and Rex will propose a specific range and arrange samples.
What to Include in Your RFQ
- Diameter and arbor hole
- Shape: T27 or T29
- Abrasive grain and grit (you can list several grits)
- Target market, and whether you need stainless steel (INOX) marking
- Branding requirements: backing plate printing, labels, packaging
- Quantity per grit, and estimated annual volume
- Reference sample (if any)
MOQ, lead time and pricing are confirmed by Rex’s sales team when quoting.
Frequently Asked Questions
We work systematically to integrate corporate responsibility in our core business and make our expertise available for the benefit of the societies where we operate.
Can you make flap discs like the ones we sell now?
Yes. Send a sample or a spec sheet. Rex makes samples first, and bulk production starts after you approve them.
Which abrasive grain should we stock for stainless steel customers?
Zirconia is the core choice. Ceramic suits heavy-load work that demands long life.
Can T27 and T29 go in one order?
Yes. They can also be combined with other Rex products in the same order.
What is a flap disc?
A flap disc is made of multiple abrasive cloth flaps stacked at an angle on a backing plate. It is used on an angle grinder and grinds and blends in one step.
What do P40 and P80 on a flap disc mean?
They are grit numbers under the FEPA / ISO 6344 standard. The lower the number, the coarser the grit and the faster it grinds. The higher the number, the finer the grit and the smoother the finish.
Do you have certificates?
Yes. Rex holds ISO 9001, ISO 14001, BSCI, FSC and MPA certification. Certificate files are available on request.
Can we test samples first?
Yes. Samples are made before bulk production, and the sample policy is confirmed when quoting.
Advanced Coated Abrasive Factory in China
Get a Quote
Send the product, size, grit and quantity, plus any sample photos or drawings. Rex’s sales team will reply with a quote and a sample plan.