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    Slitting Round Blade/ Slitting Disc Knife

    Slitting Round Blade/ Slitting Disc Knife
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    SLITTING ROUND BLADE SLITTING DISC KNIFE (3).jpg

    High-Precision Slitting Round Blade/Disc Knife from China Suppliers for Steel and Metal Factory Applications

    The slitting disc knife is an essential tool for various industries in China, including large steel factories, steel pipe plants, and non-ferrous metal processing plants. This high-precision cutting solution is ideal for tying material factories, cold rolling plants, packaging material factories, steel processing service centers, and strip mills. As one of the leading suppliers in the market, our factory ensures the highest quality standards and performance for machine manufacturers requiring superior precision. Choose our slitting disc knife for unmatched efficiency and reliability in your production processes
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      Product Details

      Product Introduction

      We can now guarantee that the thickness tolerance of ± 0.0005mm. For a certain inner circle, the tolerance can reach H3. All high-precision products are tested in a constant temperature room. With the continuous improvement of machining precision of sheet metal, we have developed ultra high precision cutting tools, whose accuracy has so far been matched by precision milling tools.

      🎯 Routine Standards:  ± 0.001mm thickness tolerance  |  Ra 0.1µ surface roughness — Using our expertise, we also meet customers' higher tolerances for thickness, parallelism, flatness, outer and inner rings.
      🔬
      Thickness Tolerance
      ± 0.0005mm
      Guaranteed precision level
      ⚙️
      Inner Circle Tolerance
      H3 Grade
      Achievable for certain inner circles
      📐
      Surface Roughness
      Ra 0.1µ
      Routine standard finish
      🌡️
      Testing Environment
      Constant Temp Room
      All high-precision products tested

      We can also attach a rubber sleeve to the outer diameter according to the customer's request, so that it can be exported smoothly with the knife to prevent scratches. The rubber sleeve is made of natural primary rubber such as green amine and acrylonitrile butadiene rubber, IRHD: 78~75, and Polyurethane isolation ring (IRHD: 80~85).

      🛡️ Rubber Sleeve Materials

      Natural primary rubber — green amine & acrylonitrile butadiene rubber (IRHD: 78~75); Polyurethane isolation ring (IRHD: 80~85). Prevents scratches during export.

      🔩 Blade Sleeve Materials

      Available in S45C, S50C, and 65Mn. S45C is the most commonly used material, offering reliable hardness and dimensional stability.

      📏 Blade Sleeve Usage: Adjusts the width between the dividing round knife, upper knife, lower knife, and horizontal gap. Common blade sleeve thickness ranges from 0.9mm to 100mm.
      • Blade sleeve produced through: forging → machining → heat treatment → leveling grinding
      • Hardness: 47 ± 2 HRC
      • Thickness tolerance controlled within: ± 0.003mm/mt
      • Aluminum spacer option available (material: AL7075) — reduces overall weight significantly
      • Aluminum spacer thickness tolerance also controlled within: ± 0.003mm/mt

      ⚡ Steel Blade Sleeve

      Material: S45C / S50C / 65Mn
      Hardness: 47 ± 2 degrees
      Tolerance: ± 0.003mm/mt
      Range: 0.9mm ~ 100mm thickness

      🪶 Aluminum Spacer

      Material: AL7075
      Purpose: Weight reduction
      Tolerance: ± 0.003mm/mt
      Custom sizing available on request

      Frequently Asked Questions

      Q What is the highest thickness tolerance precision you can achieve?
      Our current guaranteed thickness tolerance is ± 0.0005mm. For specific inner circle applications, we can achieve tolerances up to H3 grade. Routine production standards maintain ± 0.001mm thickness tolerance and Ra 0.1µ surface roughness.
      Q How are high-precision products tested and verified?
      All high-precision products undergo strict quality inspection in a constant temperature room to eliminate thermal expansion variables. We verify thickness, parallelism, flatness, and both outer and inner ring tolerances to meet customers' exact specifications.
      Q What materials are available for blade sleeves?
      Blade sleeves are available in S45C, S50C, and 65Mn steel, with S45C being the most widely used. Each sleeve undergoes forging, machining, heat treatment, and leveling grinding processes. The final hardness is 47 ± 2 HRC, with thickness tolerance controlled within ± 0.003mm/mt.
      Q Can you supply lightweight aluminum spacers instead of steel blade sleeves?
      Yes. To reduce weight, we offer aluminum spacers made from AL7075. These maintain the same strict dimensional control, with thickness tolerance also within ± 0.003mm/mt, making them an excellent option for weight-sensitive applications.
      Q What is the purpose of the rubber sleeve on the outer diameter?
      The rubber sleeve is attached to the outer diameter upon customer request to prevent scratches during product export and handling. It is made from natural primary rubber (green amine / acrylonitrile butadiene rubber, IRHD: 78~75) or a polyurethane isolation ring (IRHD: 80~85).
      Q What thickness range is available for blade sleeves?
      Standard blade sleeve thickness ranges from 0.9mm to 100mm. They are used to set precise widths between the dividing round knife, upper knife, lower knife, and to control horizontal gap adjustments in slitting operations.