K390-560

A direct replacement for the Summa 9TL89-67041 (previously 391-360), with no holder modification needed. Single edge drag blade for kiss cutting on Summa flatbed cutting systems.

Sold individually.

Direct OEM replacement

The K390-560 replaces Summa 9TL89-67041, previously sold as 391-360. Same form, same fit, same geometry. Drop it in and cut. [PLACEHOLDER: Confirm compatible holder designation — Zoho data references tangential blade holder 395-322 but the source text is truncated. Confirm full compatible holder list and Summa machine models before publishing.]

What is kiss cut cutting?

Kiss cutting means the blade cuts through the face material (the vinyl, film, or label stock) without cutting through the liner underneath. The finished piece peels cleanly from the sheet. This blade is built specifically for kiss cut work. It is not a through-cut blade.

Fine grain tungsten carbide

The K390-560 is ground from fine grain tungsten carbide. On a Summa table running kiss cut work, that means cleaner contact at the liner, an edge that holds up through production runs, and more cuts per shift before the blade needs to come out.

Common questions

How do I know this fits my machine?

If your machine currently takes a Summa 9TL89-67041 (or the older 391-360), the K390-560 fits with no modification. Not sure which blade your holder takes? Contact us before ordering. We know these holders.

What materials does it cut?

This blade is rated for self adhesive vinyl, polycarbonate, polyester, masking film, window prep vinyl, magnetic media, transfer paper, and 3M VHB — all kiss cut to 0.039in (1.0mm) maximum depth. If you are cutting through the liner or working with dense composite materials, a different blade geometry is the right call. Reach out and we can point you in the right direction.

What do the cutting angle and wedge angle mean?

[PLACEHOLDER: Confirm cutting angle before publishing — see Team Questions #1. Use dual-angle FAQ template once angle is confirmed.] The 40° wedge angle provides the balance of sharpness and edge durability the blade needs for consistent liner protection in production. The cutting angle and wedge angle are two properties of the same blade, not two configurations.

How do I know when to replace it?

Watch cut quality. The blade is dragging instead of cutting clean, the face material is tearing rather than releasing, or cuts are not going deep enough to lift consistently. When you see any of those, swap it. Pushing a dull blade on vinyl usually means weeding problems before the run is done.

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.