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Mixed set · professional

PFERD 4-piece cutting and flap disc set

Three cutting discs and a flap disc from a professional abrasives maker — the two jobs, in the right proportion.

PFERD 4-piece cutting and flap disc set, product photograph

PFERD 4-piece cutting and flap disc set

Three cutting discs and a flap disc from a professional abrasives maker — the two jobs, in the right proportion.

Cutting discs
3 × 125 × 1.0 mm (0.12 × 4.92 × 0.04 in), straight
Flap disc
1 × polishing/finishing disc
Diameter
125 mm (4.92 in)
Amazon reference
B0B33M94D5
EAN
4007220422618
  • A professional abrasives manufacturer rather than a hardware brand
  • Three-to-one is roughly the real consumption ratio of cutting to finishing
  • Four discs is a small quantity for €17

Best for: Trying a better grade of abrasive before committing to a box

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Specifications

Cutting discs
3 × 125 × 1.0 mm (0.12 × 4.92 × 0.04 in), straight
Flap disc
1 × polishing/finishing disc
Diameter
125 mm (4.92 in)
Amazon reference
B0B33M94D5
EAN
4007220422618

The ratio is the insight

Most people buy cutting discs and forget flap discs, then dress welds with the wrong tool. Three to one is close to how they are actually consumed.

Where premium abrasives show

In how flat the disc stays as it wears and how quickly it cuts under light pressure. Cheap discs tempt you to push, and pushing is what breaks discs.

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

What does a flap disc do that a grinding disc does not?

It sands rather than grinds. A flap disc is overlapping abrasive cloth leaves, so it removes material progressively and leaves a finished surface, where a rigid grinding disc gouges and leaves a coarse texture. For dressing a weld back flush, a flap disc does in one step what a grinding disc plus sanding would take two.

Is a premium abrasive brand worth it?

On cutting discs, measurably. Better bonded discs cut faster, stay flatter and wear more slowly, so the cost per cut can be lower despite the higher price per disc. On a hobby workload the difference is small; on a day of cutting it is obvious in your wrists as well as your bin.

Welders this fits

More cutting & grinding discs

  • STONE REEF Cutting discs 125 × 1 mm, 25 pieces, product photograph

    STONE REEF Cutting discs 125 × 1 mm, 25 pieces

    Twenty-five thin discs for €12 — buying in bulk is what stops people cutting with a worn disc.

    Diameter
    125 mm (4.92 in)
    Thickness
    1 mm (0.04 in), extra thin
    Quantity
    25 discs
    Amazon reference
    B0DMVSF9NW
    EAN
    4262384160930
    • €12 for 25 discs: less than half a euro per disc
    • 1 mm (0.04 in) cuts faster and cooler than thick discs, with less material wasted
    • Thin discs are more fragile against side loads — they snap if the cut binds

    Best for: Anyone who cuts steel regularly and has been rationing discs

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  • 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

    Check price on Amazon
  • Bosch Accessories X-LOCK 5-piece set, Ø 125 mm, product photograph

    Bosch Accessories X-LOCK 5-piece set, Ø 125 mm

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

    Diameter
    125 mm (4.92 in)
    Quantity
    5 discs
    Mount
    X-LOCK
    Materials named by the maker
    Stainless steel and steel
    Amazon reference
    B083GFXR2G
    EAN
    3165140995542
    • No wrench, no flange nut: the disc clicks on and releases with a lever
    • Named for stainless as well as steel — iron-free discs matter on stainless
    • X-LOCK discs need an X-LOCK grinder — they do not fit a standard M14 spindle

    Best for: Owners of X-LOCK grinders who change discs several times a day

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Elsewhere in the workroom

  • STAHLWERK Titan 3-in-1 True Colour with memory, product photograph

    STAHLWERK Titan 3-in-1 True Colour with memory

    A helmet with a memory: the shade and sensitivity you set for TIG are recalled instead of redialled.

    Type
    Auto-darkening, True Color
    Memory
    Job memory for stored settings
    Processes
    MIG/MAG, TIG and MMA
    Amazon reference
    B0DQ3K4TC2
    EAN
    4262452493519
    • Stored settings, so switching between TIG and MIG does not mean redialling shade and sensitivity
    • True Color lens as on the cheaper models in the range
    • €90 — four times the cheapest European helmet here

    Best for: A workshop that switches between processes and materials in the same session

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  • STAHLWERK WC20 grey Ø 1.6 × 175 mm, 10 pieces, product photograph

    STAHLWERK WC20 grey Ø 1.6 × 175 mm, 10 pieces

    Ceriated tungsten in 1.6 mm: the combination that strikes reliably at very low current.

    Type
    WC20, ceriated (grey)
    Diameter
    1.6 mm (0.06 in)
    Length
    175 mm (6.89 in)
    Quantity
    10 pieces
    Amazon reference
    B07LCS95JR
    EAN
    4260294084049
    • Ceriated tungsten starts easily at low current, where other types splutter
    • 1.6 mm (0.06 in) is the right diameter for thin stainless and small work
    • 1.6 mm (0.06 in) overheats and balls up if pushed past roughly 120 A

    Best for: Thin stainless, small brackets and any work under 100 A

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  • STAHLWERK Welding magnets, 4 × 22.6 kg, product photograph

    STAHLWERK Welding magnets, 4 × 22.6 kg

    Nearly double the hold of the cheap sets — which changes what section they can position.

    Quantity
    4 magnets
    Hold
    22.6 kg (49.8 lb) (50 lbs) each
    Amazon reference
    B0DJT1DPDJ
    EAN
    4262452492925
    • 22.6 kg (49.8 lb) holds heavier section steady while you tack
    • The only magnet set here live on all six markets
    • Four magnets rather than six, at a similar price

    Best for: Positioning heavier box section and plate before tacking

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All cutting & grinding discs

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