K23
A direct replacement for the Esko BLD-SF428, Colex T00423, Zund Z23 (5005560), Gerber MCT SE23 (895023), and Summa L33 (500-9815), with no holder modification needed. Single edge oscillating flat stock blade for through cutting and scoring on Zund, Esko, Gerber / MCT, Colex, Summa, and Multicam flatbed cutting systems.
Sold individually.
Direct OEM replacement
The K23 is a direct drop-in for the Esko BLD-SF428, Colex T00423, Zund Z23 (5005560), Gerber MCT SE23 (895023), and Summa L33 (500-9815). Same form, same fit, same geometry. No holder modification needed before you start cutting.
What is through cutting and scoring?
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. Scoring is a shallower pass that creases the material along a line without cutting through, so the finished piece folds cleanly. The K23 handles both on the same machine and in the same job, which makes it well-suited for packaging, display board, and any application that combines cut-and-fold work.
Fine-grain tungsten carbide
The K23 is ground from fine-grain tungsten carbide. Carbide runs longer and holds its edge better than tool steel, particularly on abrasive substrates like corrugated, honeycomb, and sandblasting mask. On high-volume runs, the difference shows up in fewer blade changes per shift and more consistent cut quality across the full run.
Common questions
How do I know this fits my machine?
If you are running an Esko, Colex, Zund, Gerber / MCT, Summa, or Multicam flatbed cutting system and using any of the OEM part numbers listed above, the K23 is a direct replacement. If your machine or part number is not on the list and you are not certain, contact us before ordering. We would rather confirm the fit than have you waiting on a return.
What materials does it cut?
The K23 is rated for corrugated board, foamboard, folding carton, felt, leather, display board, foam rubber, carpet, sandwich board, honeycomb, sandblasting mask, PET acoustic felt, varnish blankets, and 3M VHB. If you are cutting something not on this list or are getting inconsistent results on a listed material, reach out. There may be a geometry or parameter adjustment that helps.
What do the cutting angle and wedge angle mean?
The K23 features a 45° cutting angle and an 84.5° wedge angle. The 45° cutting angle controls how the blade tip engages the material, directly affecting edge quality and how much force the machine needs to drive the cut. The 84.5° wedge angle describes the geometry of the blade body and relates to how the blade tracks through thicker substrates. Together they are tuned for clean through cuts and consistent scores on corrugated and display materials without tearing or delaminating.
How do I know when to replace it?
Watch cut quality, not a fixed count. A worn K23 will start to drag rather than cut cleanly, leave torn or ragged edges, and may begin pulling the material instead of releasing it. On scoring passes, you will see inconsistent crease depth or cracking at the fold line. Any of those signs means it is time to swap.
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.