China Suppliers Slitting Round Blade Knife for Steel and Non-Ferrous Metal Processing Factory
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. ± 0.001mm thickness tolerance, and Ra 0.1μ surface roughness are our routine standards. Using our know-how, we also meet our customers' higher tolerances for thickness, parallelism, flatness, outer and inner rings.
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: 73 ~ 75), and polyurethane isolation ring (IRHD: 80 ~ 85).
The blade sleeve material is S45C, S50C, 65Mn, of which S45C is the most commonly used material. The purpose of the blade bushing is to maintain a precise width between the dividing round knife, the upper knife and the lower knife, as well as the horizontal gap adjustment. The blade sleeve undergoes forging, machining, heat treatment, and leveling grinding, achieving a hardness of 47 ± 2 degrees, with thickness tolerances controlled within 0.003mm/mt. To reduce weight, we can also produce aluminum spacers (AL7075), with thickness tolerances also controlled within 0.003mm/mt.