K4
A direct replacement for the Zund Z4 (3910116), Kongsberg BLD-KC104 / i-104 (G42447532), and Gerber MCT KC4 (895004), with no holder modification needed. Single edge drag blade for kiss cutting and score cutting on Zund, Kongsberg, Esko, Gerber / MCT, and Cutworx Apex flatbed cutting systems.
Sold individually.
Direct OEM replacement
The K4 drops in as a direct replacement for the Zund Z4 (3910116), Kongsberg BLD-KC104 / i-104 (G42447532), and Gerber MCT KC4 (895004). Same form, same fit, same cutting geometry. No holder modification is needed.
Kiss cutting and score cutting
Kiss cutting means the blade cuts through the face material without cutting through the liner underneath. The finished piece peels cleanly from the sheet. Score cutting means the blade cuts to a set depth to create a fold or tear line without going all the way through. The K4 handles both. It is not a through-cut blade.
Fine grain tungsten carbide
Tungsten carbide holds an edge longer than steel under production conditions. Fine grain carbide gives a sharper, more consistent cutting edge, which matters on film materials where a dull blade drags rather than cuts cleanly. The difference shows up in cut quality and how many feet you get between blade changes.
Common questions
How do I know this fits my machine?
The K4 replaces the Zund Z4 (3910116), Kongsberg BLD-KC104 / i-104 (G42447532), and Gerber MCT KC4 (895004). If one of those is your current blade, the K4 drops in. Not sure? Contact us before you order and we will confirm fit.
What materials does it cut?
The K4 handles self-adhesive vinyl, polycarbonate, polyester, masking film, window prep vinyl, magnetic media, transfer paper, and 3M VHB. For thicker rigid materials or full through cuts, a different blade geometry is a better fit. Contact us if you are not sure which blade is right for your application.
What do the cutting angle and wedge angle mean?
The K4 features a 55° cutting angle and a 25° wedge angle. The 55° cutting angle helps the blade track smoothly through the material with reduced drag. The 25° wedge angle provides the right balance of sharpness and edge durability. Together, they deliver clean cuts and consistent liner protection across the film and vinyl materials this blade is built for.
How do I know when to replace it?
Watch for the blade dragging through material instead of cutting cleanly, torn edges instead of clean ones, or film not releasing from the liner after a kiss cut. Any of those is your sign to swap the blade. Running a dull blade longer damages your cutting mat and degrades output quality faster than the cost of a replacement.
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.