Circular Slitting Blade Ø250 mm OD

Overview

A standard circular slitting knife engineered for paper, film and foil slitting on slitter-rewinder, sheeter and cut-to-length lines. Manufactured from D2 (DIN 1.2379 / JIS SKD11) cold-work tool steel, vacuum heat-treated to HRC 58±2, double-side ground to a parallel-tolerance of ±0.01 mm. Available with TiN coating for extended service life on adhesive substrates.

Specifications

Applications & Compatible Machines

Primary applications and compatible OEM machine lines for this blade geometry:

• Paper slitting (40–300 gsm) —compatible with Atlas, Kampf, Goebel, Bielomatik, Pasaban and Fosber winder / sheeter lines
• BOPP / PET film slitting (12–100 µm) —compatible with Kampf, Atlas Titan, Aesus, Klockner-Bartelt and Newcast converting lines
• Aluminium foil slitting (6–40 µm) —compatible with Kampf, Rotomec, Deurotech and Henkel-Kneschke foil lines
• Tape and label stock slitting —compatible with Mark Andy, Rotoflex, Nilpeter and Gallus label presses
• Laminate slitting —compatible with Nordmeccanica, Bobst and Comexi extrusion / lamination lines

Material Selection

• D2 (1.2379) —standard grade for paper, film and foil slitting at ambient temperature
• SKD11 / DC53 —first choice for thin gauges under 1 mm; refined carbide distribution reduces chipping risk
• M2 HSS (1.3343) —recommended where the edge runs hot (high-speed lines, abrasive feedstock)
• Tungsten-carbide tipped —for the most abrasive feedstocks, typically 8–10× the edge life of D2 HSS

Manufacturing Process

1. Austenitization at 1000–1050 °C in vacuum furnace, followed by nitrogen / oil quench
2. Double temper at 480 °C and 520 °C for transformation of retained austenite
3. Hardness verification at Rockwell C —HRC 58±2 confirmed before grinding
4. Precision grinding with distortion allowance (~0.1–0.3 mm per side) reserved in stock
5. Edge preparation —micro-hone 5–15 µm specified per application
6. Optional PVD coating —TiN / TiCN / CrN per ISO 14574, adhesion tested per VDI 3198
7. CMM inspection —every dimension reported on mill certificate

Quality & Traceability

• ISO 9001:2015 mill certificate shipped with every production batch
• Material traceability per § 8.5 (heat number → finished blade)
• CMM dimensional report (HEXAGON Global S coordinate measuring machine)
• Hardness survey —three-point Rockwell C mapping per blade
• Cpk ≥ 1.33 on critical dimensions, audited quarterly

Engineering Notes

• Standard stocked OD sizes ship in 5–10 working days
• Custom non-stock OD sizes follow the 8-step process and ship in 20–25 working days from drawing approval
• Reverse-engineered parts add 5–10 working days for CMM measurement and drawing-approval stage
• Final dimensions, tolerances and hardness are confirmed in the engineering quotation —contact engineering with your drawing, worn sample or written specification

Send a drawing (DXF / STEP / PDF) or a worn sample. We will confirm material grade, hardness, tolerance and lead time within one business day.