High-Precision Rotary Slitter Knives for Metal Stripping

High-Performance Rotary Slitter Knives

What Are High-Performance Rotary Slitter Knives?

Key Features

• Hard, Wear-Resistant & Long-Lasting: Made from quality materials (Cr12MoV, SKD11, HSS, cemented carbide) and heat-treated (vacuum quenching, deep cryogenic treatment) to HRC 58-62. Optional nitriding/TiN coating for extra durability, reducing blade changes and costs.

• High Precision, Burr-Free Edges: Cutting edge tolerance is controlled to micron level. Slit coils have flat, non-curled edges with no burrs, so no extra processing is needed.

• Fully Customizable: Adjust outer diameter, inner diameter, thickness, and cutting edge angle to fit your material and slitting machine. Supports circular, irregular, and upper/lower blade sets.

• Stable at High Speeds: Even heat treatment means little deformation. Stable operation at high speeds ensures consistent strip widths, reducing waste and improving material use.

Main Types

• Circular Rotary Slitter Knives: Most common, disc-shaped. Adjust multiple blades for different widths. Good for standard slitting (steel, aluminum, ordinary stainless steel coils).

• Irregular-Shaped Knives: Custom designs (stepped/beveled edges) for hard-to-cut materials (thick coils, hard alloys). Fits special slitting machines and high-precision tasks.

• Upper/Lower Matching Blades: Used together as a pair for even cutting force. Standard for all slitting machines; works for all coil sizes.

Applicable Industries

• Metallurgy: Steel/aluminum mills use them for large-scale fixed-width slitting of hot-rolled/cold-rolled coils before shipping.

• Metal Processing: Sheet metal shops use them for secondary slitting, making custom narrow coils for customers.

• Automotive & Home Appliances: Provides precise narrow strips for car parts, appliance casings, and hardware.

• Special Materials: High-precision slitting for galvanized, color-coated, copper, and titanium coils (protects material surfaces).

Core Processing Technology

1. Material Selection

• Ordinary carbon steel (cold/hot-rolled): Cr12MoV or SKD-11 (HRC 58-60) – tough, wear-resistant, good for high-volume slitting.

• Stainless steel (304, 316, 430): Cr12MoV1 or D2 (HRC 60-62) – strong wear resistance, no chipping, burr-free cuts.

• Soft non-ferrous metals (aluminum, copper, brass): HSS or alloy tool steel – smooth cuts, less material sticking/scratches.

• Galvanized/color-coated strips: Cr12MoV (HRC 58-60) with mirror polishing/nitriding – protects coatings, no zinc loss/scratches.

2. Other Key Processes

• Heat Treatment: Vacuum quenching for even hardness, less chipping/breakage.

• CNC Machining: Precision lathes/grinders for strict tolerance control.

• Custom Cutting Edges: Small angles for thin materials, large angles for thick/hard materials (polished for smooth cuts).

• Surface Strengthening: Nitriding/TiN coating for harder surfaces, less friction, and less material sticking.

Daily Use & Maintenance (Extend Lifespan)

• Installation: Check for chipped/burred edges before installing. Ensure blade and spindle alignment; tighten securely to avoid wobbling.

• Parameter Adjustment: Set blade spacing and cutting gap based on material thickness. Too big = burrs; too small = more wear.

• Operation & Storage: Clean metal chips during use. Rust-proof idle blades; store in a dry, flat place (avoid collisions).

Why Choose Our Knives?

• Direct Manufacturer: Own workshop and full CNC equipment; custom orders available with on-time delivery.

• Quality Guarantee: Full inspection from material selection to finished products – ensures accuracy and durability.

• Full Compatibility: Covers all blade types (round, irregular, upper/lower) – fits all slitting machine models.

• After-Sales Support: One-stop service (blade selection, installation help, grinding/repair) to solve your problems.