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Flap discs · grit range

Amboss Werkzeuge Flap disc set Ø 125 mm, K40–120

Four grits, two of each: the progression that takes a weld from proud to invisible.

Amboss Werkzeuge Flap disc set Ø 125 mm, K40–120, product photograph

Amboss Werkzeuge Flap disc set Ø 125 mm, K40–120

Four grits, two of each: the progression that takes a weld from proud to invisible.

Diameter
125 mm (4.92 in)
Grits
40, 60, 80 and 120
Quantity
2 of each grit
Materials named by the maker
Steel and stainless
Amazon reference
B0D4VT6VLL
EAN
4251128795552
  • A full progression rather than a single grit — the way finishing actually works
  • Named for stainless as well as steel
  • Eight discs of four kinds means you exhaust 40 and 60 first

Best for: Dressing welds properly, from removing the bead to blending the surface

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Specifications

Diameter
125 mm (4.92 in)
Grits
40, 60, 80 and 120
Quantity
2 of each grit
Materials named by the maker
Steel and stainless
Amazon reference
B0D4VT6VLL
EAN
4251128795552

Progression, not brute force

The temptation is to stay on 40 grit until the weld is flat and call it done. What you have then is a flat surface covered in deep scratches. Two more discs and five minutes make the difference between a repair and a finish.

On stainless, slow down

Heat is what turns stainless brown and ruins its corrosion resistance. Less speed, less pressure, more patience.

Sources

Every figure above comes from the manufacturer’s published specification for this reference. Fields the listing does not publish are left out rather than estimated. Market availability was verified per market on the EAN.

The questions welders ask

Why not just use one grit?

Because each grit only removes the scratches of the one before it. Starting at 40 removes the weld bead fast and leaves deep scratches; 60 and 80 remove those; 120 leaves a surface fine enough to paint or to polish further. Skipping steps means the deep scratches stay, and they show through paint.

How do I avoid burning stainless?

Lower the speed and keep the disc moving. Stainless conducts heat poorly, so it stays hot exactly where you are working and discolours in seconds. A grinder with speed control — several on this site have it — run at 5,000 to 7,000 rpm, with light pressure, is the answer.

Welders this fits

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    X-LOCK discs clip on without a wrench — provided your grinder has an X-LOCK mount.

    Diameter
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    Quantity
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    Mount
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    Materials named by the maker
    Stainless steel and steel
    Amazon reference
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    EAN
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    • Named for stainless as well as steel — iron-free discs matter on stainless
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    Search Amazon for this model
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    Amazon reference
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    EAN
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    The only disc listing in this hub to cite the European safety standard for bonded abrasives by number — alongside the highest published speed rating on the shelf.

    Amazon reference
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    EAN
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Elsewhere in the workroom

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    Amazon reference
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    EAN
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    Amazon reference
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    EAN
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    Torch
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    Wire diameter
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    Contents
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    Amazon reference
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    EAN
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    Check price on Amazon

All cutting & grinding discs

Prices quoted in these summaries are dated readings. The live price is shown next to each product.