Phone:
86-15852949220
NANJING ALAS INTERNATIONAL CO., LTD
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Nanjing, China
L/C, T/T, Money Gram
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Cut wide metal coils (steel, stainless steel, aluminum, copper, etc.) into narrow strips
Essential for metal coil deep processing in many industries
Affect cut edge flatness, burr-free quality, and production efficiency
Even a 0.002mm error can cause uneven edges and costly burrs
ALAS rotary slitter blades use in-house precision CNC grinding
Ensures tight tolerances for flatness and parallelism
Guarantees clean cutting of stainless steel, aluminum, and high-strength alloys at high speeds
Made from high-quality materials (Cr12MoV, SKD11, high-speed steel, cemented carbide)
Professional heat treatment (vacuum quenching, deep cryogenic treatment)
Hardness: HRC58-62
Optional nitriding/TiN coating for better wear and impact resistance
Reduces blade changes and production costs
Cutting edge tolerance controlled at micron level
Strict control of runout and end face runout
Flat, non-curled, burr-free edges after slitting
No need for secondary processing; faster downstream production
Customizable: outer diameter, inner diameter, thickness, cutting edge angle
Fits all types of slitting machines
Supports circular, irregular shapes, and upper/lower blade sets
Uniform heat treatment, minimal deformation
Stable operation at high speeds (no wobbling)
Consistent slitting dimensions; less waste, higher coil usage
Circular Slitter Blades: Most common, disc-shaped. Adjust to cut different widths. Suitable for standard metal coils (steel, aluminum, etc.).
Irregular-Shaped Blades: Custom designs (stepped, beveled edges). For hard-to-process materials (thick coils, special alloys).
Upper/Lower Matching Blades: Used together as a cutting pair. Standard for all slitting machines; fits all coil sizes.
Metallurgy: Slit large coils (steel, aluminum, stainless steel) to standard widths before shipping.
Metal Processing: Secondary slitting of coils into custom narrow strips for customers.
Automotive & Home Appliances: Precision slitting for car parts, appliance casings, and hardware.
Special Materials: Slit surface-treated coils (galvanized, color-coated, copper, titanium) without damaging surfaces.
Material Selection: High-toughness alloy tool steel/high-speed steel; high-end models use cemented carbide.
Heat Treatment: Vacuum quenching for uniform hardness and better toughness (prevents chipping).
Precision CNC Machining: CNC lathes/grinders for tight tolerances and accurate assembly.
Custom Cutting Edge: Small angle for thin materials; large angle for thick/hard materials. Polished for burr-free cutting.
Surface Strengthening: Nitriding/TiN coating for higher hardness, less friction, and less material sticking.
Check for chipping/burrs on the cutting edge before installation
Ensure blade and spindle are coaxial; tighten securely
Prevent wobbling/loosening during high-speed operation
Adjust blade spacing and cutting gap based on material type and thickness
Too large gap = burrs; too small gap = more wear
Clean metal chips promptly to avoid scratching the cutting edge
Apply rust protection to idle blades
Store in a dry, flat place; avoid collisions
We are your application engineering partner, not just a supplier
Analyze your coil thickness and line speed to provide custom gap and coating advice (TiN, DLC)
Choosing ALAS reduces downtime and improves edge quality, lowering total cost of ownership (TCO)
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 |
Own production workshop, complete CNC machining equipment, support for customized orders, and controllable delivery time;
Full-process quality inspection, from material selection to finished products, ensuring blade accuracy and wear resistance;
Covering round, irregular, upper/lower blades, compatible with all models of slitting machines, meeting the processing needs of different industries;
Providing one-stop service including blade selection, installation guidance, and precision grinding and repair, solving processing problems.
A: We primarily use high-performance tool steels such as D2 (Cr12MoV1), SKD11(Cr12MoV), and High-Speed Steel (HSS). For specialized high-volume production, we also offer Tungsten Carbide tipped blades which provide superior wear resistance and extended service life.
A: Blade clearance (the horizontal gap between top and bottom blades) typically ranges from 8% to 12% of the material thickness. However, this depends on the tensile strength of the metal. Our technical team provides custom advice based on whether you are slitting aluminum, stainless steel, or carbon steel.
A: Yes, we are a professional OEM/ODM manufacturer. We can produce rotary slitter blades compatible with major machinery brands. Simply send us your technical drawings or a physical sample for a precision-matched replacement.
A: We achieve burr-free results through mirror-finish grinding and strict control of lateral run-out (typically within 0.002mm). This reduces friction and heat, ensuring a clean, square edge on every strip.
A: Standard sizes are often in stock. Custom orders typically take 15–25 days. For global shipping, all blades are coated with anti-rust oil, wrapped in protective film, and secured in reinforced export-standard wooden cases to prevent damage during transit.
English: Rotary Slitter Blades | Circular Metal Slitting Knives
French (Français): Lames circulaires de refendage | Couteaux rotatifs pour métal
Portuguese (Português): Lâminas rotativas de corte longitudinal | Facas para metal
Polish (Polski): Noże tarczowe do cięcia wzdłużnego | Noże do rozcinania metalu
Turkish (Türkçe): Rotatif Dilme Bıçakları | Metal Dilme Daire Bıçakları
Vietnamese (Tiếng Việt): Lưỡi dao xẻ cuộn kim loại | Dao cắt tròn chính xác
Thai (ภาษาไทย): ใบมีดสลิทเตอร์โรตารี่ | ใบมีดกลมสำหรับแบ่งม้วนโลหะ
Filipino: Mga Rotary Slitter Blade | Kutsilyo para sa Pagpira-piraso ng Metal
Arabic (العربية): شفرات القص الطولي الدائرية | سكاكين تقطيع المعادن الدوارة
Hindi (हिन्दी): रोटरी स्लिटिंग ब्लेड | धातु प्रसंस्करण के लिए गोलाकार चाकू
Indonesian (Bahasa Indonesia): Pisau Slitter Rotasi | Bilah Potong Gulungan Logam
Malay (Bahasa Melayu): Bilah Pengiris Putar (Slitter) | Pisau Pemprosesan Logam
Dutch (Nederlands): Roterende slitmessen | Circulaire messen voor metaalbewerking
Swedish (Svenska): Roterande slitsknivar | Cirkulära knivar för metallbearbetning
Hungarian (Magyar): Rotációs hasítókések | Körkések fémfeldolgozáshoz
Greek (Ελληνικά): Κυκλικά μαχαίρια σχισμής | Λεπίδες επεξεργασίας μετάλλων
Nanjing Alas International Co., Ltd. is a professional industrial tooling manufacturer focused on shear blades, bending dies, shredder blades, and custom wear parts. We offer full application engineering, material selection, setup guidance, and after-sales support to global customers.
Tell us your requirements, and our engineering team will provide professional solutions for blade specification, tool life optimization, and cost-effective production.