K124r

A direct replacement for the Esko BLD-SR8124 (42450494) and Gerber MCT SE81R, with no holder modification needed. Single edge drag blade for through cutting on Esko, Kongsberg, and Gerber / MCT flatbed cutting systems.

Sold individually.

Direct OEM replacement

The K124R is a confirmed drop-in replacement for the Esko BLD-SR8124 (42450494) and the Gerber MCT SE81R. Same form, same fit, same 8mm round stock geometry. No holder swap, no adapter. Order, install, cut.

What is through cutting?

Through cutting means the blade cuts completely through all layers of the material, including any backing or liner. The cut piece separates fully from the sheet. If you are cutting polycarbonate, polyester film, or magnetic media to finished size, through cutting is the method you are using.

Fine grain tungsten carbide

The K124R is ground from fine grain tungsten carbide. Fine grain carbide holds a sharper edge longer than standard carbide or steel. On abrasive materials like polycarbonate or 3M VHB, that edge retention is the difference between a blade that runs a full shift and one you are swapping out halfway through. You get cleaner cuts per blade and fewer stops per job.

Common questions

How do I know this fits my machine?

If your machine uses an Esko BLD-SR8124 (42450494) or a Gerber MCT SE81R, the K124R is a direct replacement. If you are not sure which blade your machine takes, reach out before ordering. We will confirm the right blade for your setup.

What materials does it cut?

The K124R is rated for self adhesive vinyl, polycarbonate, polyester, masking film, window prep vinyl, magnetic media, transfer paper, and 3M VHB. For thin or delicate materials where liner protection matters more than cut-through, a kiss cut blade geometry is usually a better call. If you are not sure, ask us.

What do the cutting angle and wedge angle mean?

The K124R features a 30° cutting angle and a 65° wedge angle. The 30° cutting angle helps the blade track smoothly through the material with reduced drag, while the 65° wedge angle provides the right balance of sharpness and edge durability. Together, they deliver clean cuts, good detail reproduction, and consistent performance across a range of materials.

How do I know when to replace it?

Watch your cut quality, not a blade count. When edges start dragging instead of cutting clean, when material is tearing at corners, or when cut pieces are not releasing cleanly, it is time for a fresh blade. Pushing a dull blade rarely saves time.

Getting the most from your cutting table

A fresh blade is a good start. But if you are going through blades faster than expected, or cut quality has become inconsistent, the blade is rarely the whole story. Cut depth, speed, pressure, and machine condition all affect how long a blade lasts and how clean it cuts.

It is worth asking: When was your machine last serviced? Are your parameters dialed in for this material? Is this the right blade geometry for what you are cutting? Could your operators use time with someone who runs these machines every day?

Flatbed Tools offers machine service, preventive maintenance, operator training, and workflow consulting. If something is not cutting right, reach out. We have probably seen it before.