Customized sizes are available, according to your drawing or sample.
YISHI Machinery manufactures precision rasper blades for heavy-duty tyre, cable, and aluminium recycling. Blades are produced from D2 (Cr12MoV) and M2 high-speed steel, vacuum heat-treated to HRC 58–65 for optimal wear resistance and impact toughness. Serrated edges deliver aggressive material separation on machines including Eldan R800/1200, MPR 120–200, BDD, and VZ90. Tight thickness tolerances of ±0.01 mm and a surface finish of Ra 0.8 µm ensure consistent cutting clearance and extended service life.
D2 (Cr12MoV) at HRC 58–62 for abrasive materials; M2 HSS at HRC 62–65 for high-temperature resistance. Vacuum heat treatment minimizes distortion.
Custom serration pitch and depth reduce power draw and increase throughput in tyre and cable lines. Available as full-length or segmented serrations.
Blade thickness tolerance ±0.01 mm, flatness ≤0.03 mm/100 mm, bore H7. Ensures uniform rotor-stator clearance and minimal vibration.
TiAlN or AlCrN coatings raise surface hardness above 2000 HV, cutting friction and extending blade life by up to 2× in abrasive aluminium or e-waste applications.
Exact-fit blades for Eldan R800/1200, R804/1207, MPR 120/160/200, BDD, VZ90, Diffundit, Synth, and HR125. Custom holders and wedges per sample.
We supply high-performance knives for heavy-duty raspers, engineered to meet the demands of secondary processing applications. The serrated blade edges deliver aggressive cutting action, ideal for separating materials in tyres, cables, and aluminium.
Based on your input material, we can recommend the most suitable knife material and hardness to ensure optimal performance and longevity.
Our product range includes precision-manufactured components for reliable, efficient operation:
Rotor Knives
Stator Knives
Blade Holders
Clamping Wedges
We provide only high-quality knives and wear parts designed for the most demanding environments.
| Type | Straight knives |
|---|---|
| Application | Crumb, Rubber, Aluminium, Cables, Copper, Shred, Tyres |
| Size | R800/1200, R804/1207, MPR 120, MPR160, MPR200, Multi Purpose Rasper, BDD, VZ90, Diffundit, Synth, HR125, Heavy Rasper |
| Dimensions | OD 200–1200 mm, width 10–80 mm, length up to 1500 mm, thickness 6–50 mm |
| Materials | D2 (Cr12MoV), M2 HSS, H13, SKD11, Tungsten Carbide (TC) |
| Hardness | D2: HRC 58–62; M2: HRC 62–65; TC: HRA 85–90 |
| Tolerances | Thickness ±0.01 mm, parallelism ≤0.02 mm, flatness ≤0.03 mm/100 mm, bore H7 |
| Surface Finish | Ra 0.8 µm standard; Ra 0.4 µm available |
| Customisation | OEM hole patterns and PCDs; custom configurations accepted from drawings or samples |
YISHI controls the entire manufacturing process in-house—from certified steel procurement (DIN/GB/AISI) to vacuum heat treatment and 5-axis CNC grinding. This vertical integration ensures consistent hardness profiles, tight tolerances, and fast turnaround. We stock popular sizes for immediate shipment and reverse-engineer worn OEM parts to provide drop-in replacements. Every blade set is inspected for flatness, thickness, and surface finish before shipment.
D2 (Cr12MoV) at HRC 58–62 offers the best balance of wear resistance and toughness for tyre shredding. It withstands steel belts without chipping. For extreme throughput, M2 HSS can be used.
Yes. Provide a drawing, CAD file, or sample, and we will reproduce the blade to tolerances of ±0.01 mm, including hole patterns and serrations.
Yes, we apply TiAlN or AlCrN PVD coatings that increase surface hardness to >2000 HV. These are recommended for highly abrasive materials like aluminium scrap or e-waste.
Standard replacement knives are in stock and ship within [short timeframe]. Custom-manufactured items are typically delivered within [X] weeks from drawing approval. Expedited service is available for breakdowns.
Yes, we manufacture complete knife sets for Eldan MPR 120, 160, and 200, as well as older models. All components match OEM specifications.
