Serrated Super Hardness Slotter Cutting Blade HRC 68 for Corrugated Carton Slotter Machine

The ZHIJING Serrated Super Hardness Slotter Cutting Blade is a heavy-duty replacement part engineered for corrugated carton slotter machines that process multi-wall and highly recycled board. Standard straight-edge blades meet the full width of the cut at once, which concentrates force, generates heat and quickly dulls the edge on abrasive recycled fiber. The serrated profile of this blade changes the cutting action completely: each tooth works like a small chisel, penetrating the board progressively so the total cutting force is lower, vibration is reduced, and the edge stays cooler even during sustained high-speed running. Converters on heavy-duty work report cleaner slots, less dust and significantly longer intervals between regrinds.

The blade is manufactured from super-hardness steel and heat treated to HRC 63-68, with the option of high speed steel or carbide-enhanced grades for the most abrasive board conditions. Tooth pitch and profile are not fixed: they are selected according to the board grade, flute construction and machine speed, so the blade can be tuned for coarse recycled furnishes or for finer, cleaner cuts on demanding multi-wall work. Precision grinding keeps the cutting circle and tooth geometry consistent across the full length, which protects the machine bearings from uneven load and keeps slot dimensions accurate box after box.

• Progressive Serrated Cutting Action: Each tooth penetrates the board progressively, lowering peak cutting force and reducing stress on the machine drive train.
• Super Hardness HRC 63-68: The wear-resistant edge survives abrasive recycled fibers and clay coatings far longer than standard blades.
• Low Heat Generation: Lower cutting force and better chip clearance keep the edge cool, delaying softening and extending productive running time.
• Reduced Dust and Noise: The chisel-like teeth produce coarse, easily extracted cuttings instead of fine dust, keeping the work area cleaner.
• Customizable Tooth Profile: Tooth pitch, depth and edge angle are matched to your board grade, flute type and machine speed.
• Stable Dimensional Accuracy: Consistent tooth geometry maintains accurate slot width and depth across the whole blade length for the entire service life.

This serrated blade is built for the slotting stations of heavy-duty flexo printer slotters, rotary slotters and folder gluers running double wall containers, heavy-duty transit packaging and board with high recycled content. It excels where standard blades dull quickly or where slot edges fray on coarse furnishes. The blade is equally effective on machines with lower horsepower that struggle with thick board, because the progressive tooth engagement reduces the peak load on the motor and drive train. The same serrated technology can be applied to trim knives and cutoff knives on corrugator lines. Tell our engineers your board recipe, flute profile, machine model and running speed, and we will engineer the correct tooth geometry and hardness grade for your operation.

Serrated edges are protected with anti-rust oil and rigid edge guards, then packed in carton boxes or plywood cases sized to the blade so the teeth arrive undamaged. ZHIJING operates an ISO9001 quality system covering spectrometer verification of incoming steel, hardness confirmation after heat treatment and final inspection of geometry and edge condition before shipment. Material certificates, test reports and pre-production samples are available on request. OEM and ODM orders are accepted, and our application engineers provide fast technical support for blade selection, installation and regrinding to maximize the return on your heavy-duty tooling investment.