Carton Slitting Blades for Paperboard Converting

Carton slitting blades from Baitian Blade are made for paperboard, folding carton and corrugated packaging converting. Every knife is produced to the drawing, the worn sample or the machine fit, so a slitting, trimming or cutting station can be re-knifed with a matching blade.

Carton Slitting Blade Applications

Carton slitting blades are used where paperboard, corrugated board or packaging material has to be split, trimmed or cut to width on a converting line. Typical mounting points include longitudinal slitting units, slitter-scorers, reel and sheet cutters and rotary cutting stations. Blade type, edge profile and mounting pattern are matched to the material, the cutting position and the way the knife is clamped on the machine.

In paper and board converting, the same products may also be specified as paper cutting machine blades. The correct blade depends on the board structure, cutting method, machine fit and required cut quality.

Blades are supplied as individual knives, complete circular blade rings and matched knife-and-spacer sets, so a converting line can be kept on one cutting standard.

• Paperboard and folding carton converting
• Corrugated board and packaging converting
• Slitting, trimming and edge-cutting stations
• Replacement knives for existing cutting units

Straight, Serrated and Circular Carton Knives

The cutting action decides which knife geometry suits the job. Straight, serrated and circular knives cover most paperboard and carton converting stations.

Straight carton slitting knives

Straight knives are used for longitudinal slitting and trimming where a clean shear cut is required. Mounting holes, slots and the locating edge are machined to the drawing so the knife sits correctly on the holder.

Serrated carton cutting knives

Serrated knives cut with a sawing action and are used where the board or the cutting station calls for a toothed edge. Tooth pitch, tooth depth and the mounting slots are agreed with the customer for the material being cut.

Circular carton slitting knives

Circular knives rotate with the line and are used for continuous slitting of webs and sheets. Diameter, bore, edge bevel and ring thickness are made to suit the shaft and the cutting unit.

For continuous web and sheet cutting, a circular carton slitting knife may also be specified as a paper cutting circular blade. Diameter, bore, edge bevel and ring thickness must match the shaft and cutting unit.

How to Select a Carton Slitting Blade

Selection starts from the cutting condition rather than a catalogue number. The points below are reviewed before a blade is quoted or produced.

• Material and board structure – paperboard, corrugated board or laminated packaging stock
• Cutting method – shear slitting, crush cutting, rotary cutting or scoring
• Machine and holder – how the knife is clamped, keyed or spaced on the shaft
• Blade geometry – diameter, thickness, bore and edge profile
• Mounting pattern – hole positions, slot shape and locating features
• Cut quality required – edge finish, dust level and cut repeatability

If the current blade is producing dust, tearing or uneven cuts, send photographs of the blade and of the cut result so the review can focus on the real cutting condition.

Materials and Custom Specifications

Carton slitting blades are produced from tool steels selected for paper and board cutting, with the grade, hardness and edge geometry agreed for the application. Stainless and coated options can be discussed where corrosion or material build-up is a concern.

• Tool steel grades for paper and board cutting
• Diameter, thickness and bore made to the drawing
• Edge profile and bevel to suit the cutting action
• Mounting holes, slots and locating features
• Individual knives, circular knife rings and matched spacer sets
• Quantity and packing agreed per order

Specifications are confirmed in writing before production. Where a drawing is not available, dimensions are taken from the worn sample and checked with the customer.

Custom Carton Slitting Blades from Drawing or Sample

Custom carton slitting blades are made from a drawing, a worn sample or the machine fit. Production starts once the dimensions, material and edge geometry are confirmed.

• Send a CAD or PDF drawing with the blade dimensions
• Or send a worn blade or sample for measuring
• Or provide the machine model, cutting position and key dimensions
• Mounting holes, slots and locating features are checked against the sample

The finished blade is checked against the agreed drawing or sample before it is packed.

Request a Quote for Carton Cutting Knives

For a quotation, send the machine model or cutting unit and the blade position, a drawing, photo or worn sample, the material being cut, the required cut quality, and the quantity of knives, rings or spacer sets needed.

Use the enquiry form on this page or the WhatsApp button to send these details. Photographs of the blade, the mounting and the current cut result help the technical team review the application.

Frequently Asked Questions About Carton Slitting Blades

How do I choose between straight, serrated and circular carton knives?

The choice follows the cutting action. Straight knives suit longitudinal slitting and trimming, serrated knives suit applications that call for a toothed edge, and circular knives suit continuous slitting of webs and sheets. If you send the material and a photo of the existing blade, the geometry can be matched to the station.

Can carton slitting blades be made to a drawing or sample?

Yes. Blades can be produced from a CAD or PDF drawing, from a worn blade or sample, or from the key machine dimensions. The mounting pattern and edge profile are confirmed before production.

What information is needed for a quotation?

The machine or cutting unit, the blade position, a drawing, photo or sample, the material being cut, the required cut quality and the quantity are usually enough to prepare a quotation and a specification.

Do you supply knife and spacer sets as well as single blades?

Individual knives, circular knife rings and matched knife-and-spacer sets can be supplied, depending on the cutting unit.

Which materials are used for paperboard cutting knives?

Tool steels selected for paper and board cutting are used, with the grade and edge geometry agreed for the application. Stainless and coated options can be discussed where corrosion or material build-up is a concern.

How much does a paper cutting machine blade cost?

The price of a paper cutting machine blade depends on the material, diameter or dimensions, thickness, edge geometry, machine fit and order quantity. Because these blades are made for a specific cutting task, send a drawing, worn sample or machine details for a technical quotation rather than relying on a catalogue price.