Customized sizes are available, according to your drawing or sample.
The polyester staple fiber cutter blade is a precision consumable for high-speed staple fiber cutting lines, engineered to deliver clean, burr-free cuts on polyester, nylon, and other synthetic staple fibers. Manufactured from pure tungsten carbide with a typical hardness of HRA 89–92.5, these blades are ground to exacting dimensional tolerances of ±0.02 mm on thickness and ±0.05 mm on length and width. Standard stock sizes include 135 x 19 x 1.4 mm, 140 x 19 x 1.4 mm, 150 x 19 x 1.4 mm, and 155 x 19 x 1.4 mm, with full custom manufacturing available against a drawing or OEM part number. The blade is designed as a direct fit for common staple fiber cutter units from manufacturers such as Neumag, Fleissner, and DM&E, where consistent shear clearance and edge retention directly govern cut quality and machine uptime.
Blades are produced from sub-micron grain tungsten carbide, achieving a typical hardness of HRA 89–92.5 and transverse rupture strength above 2,500 MPa for maximum edge stability in high-cycle cutting.
Each blade receives a fine-ground cutting edge with a surface finish of Ra ≤ 0.2 µm on the bevel, reducing fiber adhesion and ensuring a clean scissor-like shear against the bed knife.
Standard thickness tolerance is held to ±0.02 mm, with length and width controlled to ±0.05 mm. This consistency ensures uniform clamping pressure and correct shear gap across multi-blade cutter reels.
Stock dimensions include 135 x 19 x 1.4 mm, 140 x 19 x 1.4 mm, 150 x 19 x 1.4 mm, and 155 x 19 x 1.4 mm. Custom lengths, widths, thicknesses, and mounting hole configurations are manufactured to customer drawings.
Blades can be supplied as bare inserts or vacuum-brazed onto steel carrier bodies, ensuring a bond shear strength exceeding 200 MPa for integrated cutter reel assemblies.
135x19x1.4mm
140x19x1.4mm
150x19x1.4mm
155x19x1.4mm
Note:Acceptable for custom size
Material:Pure tungsten carbide
| Dimensions | Standard: 135 x 19 x 1.4 mm, 140 x 19 x 1.4 mm, 150 x 19 x 1.4 mm, 155 x 19 x 1.4 mm. Custom: length 100–300 mm, width 15–30 mm, thickness 0.8–3.0 mm. |
| Materials | Pure tungsten carbide (WC-Co, sub-micron grade), optional D2, M2, SKD11 for less demanding applications |
| Hardness | HRA 89–92.5 (tungsten carbide); HRC 58–62 (tool steel options) |
| Tolerances | Thickness ±0.02 mm, length/width ±0.05 mm standard; tighter tolerances available on request |
| Surface Finish | Cutting bevel Ra ≤ 0.2 µm; flat faces Ra ≤ 0.4 µm |
| Customisation | Custom dimensions per drawing, OEM part number cross-referencing, mounting hole drilling, edge angle modification, vacuum brazing to carrier bodies |
YISHI Machinery manufactures tungsten carbide staple fiber cutter blades in-house using CNC grinding centers and vacuum sintering furnaces, giving direct control over material density and edge geometry. Every production batch is inspected for hardness, dimensional conformity, and edge condition, with inspection reports available on request. We accept custom orders without minimum quantity restrictions for trial runs and offer expedited 7–10 day lead times on standard sizes. Our technical team works directly with plant engineers to match blade specifications to specific cutter reel models from Neumag, Fleissner, and other OEMs, reducing the trial-and-error common with generic aftermarket blades.
We use a sub-micron grain tungsten carbide grade with a cobalt binder content optimized for impact resistance and wear life in fiber cutting. Typical hardness is HRA 89–92.5 with transverse rupture strength above 2,500 MPa. The exact grade can be tailored based on the fiber type and cutter speed.
Yes. Provide the OEM machine model, cutter reel drawing, or a sample blade, and we will reverse-engineer the dimensions, mounting configuration, and edge geometry. We regularly supply blades compatible with Neumag, Fleissner, DM&E, and other staple fiber cutter units.
Blade life depends on fiber type, cut length, throughput, and maintenance practices. Under normal conditions cutting polyester staple fiber, a set of tungsten carbide blades typically processes 200–500 tonnes before requiring re-sharpening or replacement. We recommend tracking tonnes per regrind cycle to establish your specific interval.
We do not offer re-sharpening as a standard service, but we can recommend grinding parameters and minimum thickness limits to help your in-house tool room or local grinding shop restore cutting edges correctly. Blades should be replaced when thickness falls below the minimum specified for your cutter reel clamp design.
We require the blade dimensions (length x width x thickness), material preference, quantity, and any drawings or OEM part numbers. For custom configurations, a dimensional drawing with tolerance requirements enables us to quote accurately and deliver conforming parts.
