Slitter Blades: Definition, Characteristics, Types, Applications and Maintenance
Slitter blades are key precision cutting tools for metal sheet slitting lines. They cut wide metal coils (steel, stainless steel, aluminum, copper) into custom-width narrow strips. They are vital for metal coil deep processing in many industries, and their precision affects cut edge flatness, burrs, and production speed.
Core Characteristics of Slitter Blades
High Hardness, Wear Resistance & Long Life
Made from high-quality materials: Cr12MoV, SKD11, high-speed steel, cemented carbide
Professional heat treatment (vacuum quenching, deep cryogenic treatment) achieves HRC58-62 hardness
Optional nitriding/TiN coating for better wear resistance and impact resistance
Reduces blade replacement frequency and production costs
High Precision (Micron Level) & Burr-Free Edges
Cutting edge tolerance controlled at micron level
Strict control of runout and end face runout
Flat, non-curled, burr-free coil edges after slitting
No need for secondary processing; faster downstream production
Full Customization & Machine Compatibility
Customizable: outer diameter, inner diameter, thickness, cutting edge angle
Fits all slitting machine models
Supports circular, irregular shapes, and upper/lower blade sets
Meets different processing needs
High-Speed Stability & Precise Slitting Sizes
Uniform heat treatment minimizes deformation
Stable operation (no wobbling) at high speeds
Consistent narrow strip sizes
Reduces product waste and improves coil use
Main Types of Metal Slitter Blades (Choose as Needed)
Circular Slitter Blades
Most common standard type (disc-shaped)
Adjustable blades for different cutting widths
Suitable for regular large-scale slitting (steel, aluminum, ordinary stainless steel coils)
Irregular-Shaped Slitter Blades
Custom designs (stepped, beveled edges)
For hard-to-process materials (thick metal coils, hard alloy coils, special alloy strips)
Fits special slitting machines and high-precision needs
Upper/Lower Matching Blades
Designed for slitter machine installation positions
Used together to form a precise cutting pair (even cutting force)
Standard configuration for all slitting machines
Suitable for all metal coil specifications
Applicable Industries
Metallurgical Industry
Steel/aluminum mills use them for large-scale fixed-width slitting of hot-rolled/cold-rolled steel, aluminum, and stainless steel coils before shipping.
Metal Processing Industry
Sheet metal companies use them for secondary slitting of metal coils, making custom narrow-width coils for customers.
Automotive Parts/Home Appliance Industry
Provides precise narrow metal strips for automotive stamping parts, home appliance casings, and hardware (ensures final product accuracy).
Special Materials Processing Industry
High-precision slitting for surface-treated/special coils (galvanized, color-coated, copper, titanium strips) – protects material surface and ensures cutting quality.
Core Processing Technology
Material Selection: High-toughness alloy tool steel/high-speed steel; high-end models use cemented carbide
Heat Treatment: Vacuum quenching for uniform hardness, better toughness, and no chipping/breakage
CNC Machining: Precision lathes/grinders for strict tolerance control (ensures assembly and slitting accuracy)
Custom Cutting Edge: Small angle for thin materials; large angle for thick/hard materials; polished for burr-free slitting
Surface Strengthening: Nitriding/TiN coating for higher hardness, less friction, and less material sticking
Daily Use & Maintenance (Extend Lifespan)
Installation Tips
Check cutting edge for chips/burrs before installation
Ensure blade and spindle are coaxial
Tighten securely to avoid wobbling/loosening at high speeds
Parameter Adjustment
Operation & Storage
Clean metal chips promptly to avoid scratching the cutting edge
Rust-proof idle blades; store in a dry, flat place
Avoid collisions
ALAS Industrial Slitter Blades
Superior Performance
ALAS blades are made from high-grade D2 (Cr12Mo1V1) and Cr12MoV tool steels. Our vacuum heat treatment optimizes carbide distribution, balancing hardness and toughness to prevent edge chipping at high speeds.
Engineering Solutions for Lower Costs
We are your engineering partner, not just a supplier. We analyze your material and line speed to provide custom gap and tool design recommendations. Choosing ALAS reduces downtime and improves strip quality, lowering your total cost of ownership (TCO).
Blade Metal Materials International Grade Corresponding Table
China (GB) | USA(ASTM) | Japan (JIS) | Germany (DIN) | Germany (W-Nr) | France (NF) | Russia (ROCT) | U.K (BS) |
Cr12MOV | - | SKD11 | X165CrMov12 | 1.2601 | - | X12M | - |
Cr12Mo1V1 | D2 | - | X155Cr12Mo12 | 1.2379 | X160CrMoV12 | - | BD |
4Cr5MoSiVI | H13 | SKD61 | X40CrMoV5-1 | 1.2344 | X40CrMoV5 | 4X5MO1C | BH13 |
LD | - | - | - | - | - | - | - |
W18Cr4V | T1 | SKH2 | S18-0-1 | 1.3355 | HS18-0-1 | P18 | BT1 |
W6Mo5Cr4V2 | M2 | SKH9 | S6-5-2 | 1.3343 | - | P6M5 | BM2 |
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Why Choose Our Slitter Blades?
Source Manufacturer
Own production workshop, complete CNC machining equipment, support for customized orders, and controllable delivery time;
Quality Assurance
Full-process quality inspection, from material selection to finished products, ensuring blade accuracy and wear resistance;
Full Specification Compatibility
Covering round, irregular, upper/lower blades, compatible with all models of slitting machines, meeting the processing needs of different industries;
After-Sales Support
Providing one-stop service including blade selection, installation guidance, and precision grinding and repair, solving processing problems.
Slitting Machine Blades
Stainless Steel Slitting Blades
Steel Strip Slitting Blades
Cemented Carbide Slitting Blades
For ordinary carbon steel strip (cold-rolled/hot-rolled), Cr12MoV or SKD-11 blades are recommended, used with standard round blades or paired blades. Their Rockwell hardness is HRC 58–60. These blades offer excellent toughness, wear resistance, and stable service life, making them suitable for high-volume, routine slitting operations.
For stainless steel strip (304, 316, 430), Cr12MoV1 or D2 blades are recommended, used with round blades or paired blades. The hardness should be controlled at HRC 60–62. These blades offer strong wear resistance, are less prone to chipping, and achieve burr-free and non-burring slitting results.
For soft non-ferrous metals such as aluminum, copper, and brass, high-speed steel (HSS) or alloy tool steel blades are recommended, used with precision-ground round blades. This ensures a smooth cut surface and effectively reduces material adhesion to the blade and surface scratches.
For galvanized and color-coated strips, Cr12MoV material blades are selected and used with mirror-polished round blades; the hardness is HRC 58–60, and the surface is nitrided or mirror-polished; this can effectively protect the coating on the strip surface and avoid zinc loss, paint scratches and other issues during the slitting process.