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Cutting discs · starter set

kwb 10-piece cutting disc set, Ø 125 mm

Ten discs for €15 — the cheapest way to find out how fast you get through them.

kwb 10-piece cutting disc set, Ø 125 mm, product photograph

kwb 10-piece cutting disc set, Ø 125 mm

Ten discs for €15 — the cheapest way to find out how fast you get through them.

Diameter
125 mm (4.92 in)
Quantity
10 discs
Fitment
22.23 mm (0.88 in) bore, standard
Amazon reference
B07PMNSTF7
EAN
4009317120421
  • Ten discs at €15 — cutting steel becomes cheap enough to stop rationing
  • 125 mm (4.92 in) with the standard bore fits every grinder on this site
  • Disc specification beyond diameter is not published

Best for: Everyday cutting where discs are consumed by the handful

≈ $44
Check price on Amazon

Specifications

Diameter
125 mm (4.92 in)
Quantity
10 discs
Fitment
22.23 mm (0.88 in) bore, standard
Amazon reference
B07PMNSTF7
EAN
4009317120421

The two markings that matter

Maximum permitted speed and the expiry date, both printed on the label. The first must exceed your grinder’s no-load speed; the second is not decoration on a component that spins at 11,000 rpm.

Consumption is higher than people expect

A 1 mm (0.04 in) disc cuts perhaps twenty to thirty 30 mm (1.18 in) box sections before it is too small to be useful. Buying ten at a time is not extravagant — it is the normal rate of use.

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

How thin should a cutting disc be?

For general steel, 1.0 mm (0.04 in) is the modern default: it cuts faster, generates less heat and wastes less metal than the old 2.5 mm (0.10 in) discs. Thicker discs are more robust against side loads and last longer in rough hands. If you are cutting thin sheet or stainless, thinner is better; if you are cutting rebar on site, thicker survives.

Do discs really expire?

Yes, and the date is printed on the label. Resin-bonded abrasives absorb moisture over years and lose strength, which matters because the failure mode is a disc bursting at 11,000 rpm. Store them flat, dry and out of sunlight, and throw away anything that has been dropped hard.

Welders this fits

More cutting & grinding discs

  • 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

    Search Amazon for this model
  • 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

    Search Amazon for this model
  • 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

Elsewhere in the workroom

  • EZARC arc edge reciprocating saw blade with its curved cutting edge

    EZARC 802302, arc edge 8 in 14 TPI, 5-pack

    The only blade on this shelf whose edge is curved rather than straight — a design aimed squarely at the three-teeth rule this hub is built on.

    Amazon reference
    B0H6WRG1GG
    EAN
    0810151454108
    • A curved edge, stated to engage about 110 per cent more teeth than a straight blade
    • Variable tooth height, stated to improve chip clearance and heat dissipation
    • A curved edge cannot start a cut flush against a surface the way a straight one can

    Best for: Thin-wall tube, where tooth engagement is the whole problem

    ≈ $21
    Check price on Amazon
  • EZARC carbide oscillating multi-tool blades with adapters

    EZARC 801113, carbide oscillating, 3-pack

    Carbide teeth on an oscillating blade, for hardened screws and nails — and one of the few listings on this site that names the mount system it will not fit.

    Amazon reference
    B07YDMX328
    EAN
    0611553064151
    • Carbide teeth, laser welded, for material that strips a bi-metal oscillating blade in one cut
    • States plainly what it will not fit: Starlock, Starlock Plus and Starlock Max
    • No blade width, cut depth or tooth pitch published anywhere

    Best for: Cutting hardened screws, nails and embedded metal flush with a surface

    ≈ $26
    Check price on Amazon
  • EZARC carbide tipped reciprocating saw blade with welded teeth

    EZARC R678HM, carbide 6 in 8 TPI, 3-pack

    The coarse-pitch carbide blade this shelf needs: 8 TPI for solid section, with each tooth ground and welded rather than cut from the body.

    Amazon reference
    B08FQQ52T8
    EAN
    0611553064410
    • An 8 TPI pitch, the only coarse blade on this shelf, which is what solid section needs
    • Carbide teeth, individually precision ground and welded, rather than hardened steel teeth
    • Claims "up to 50x longer life than bi-metal" with no test or condition behind it

    Best for: Rebar, car beams and hardened steel, where a bi-metal blade dulls in one cut

    ≈ $25
    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.