faq
Yes. We specialize in small-diameter precision machining for laboratory and pilot-scale twin-screw extruders (e.g., 12 mm, 16 mm, 18 mm, and 26 mm diameters). Machining micro screw elements and thin splined shafts requires ultra-tight tolerance control, which we handle using specialized multi-axis CNC machines and custom fixtures.
Hardness depends on the material chosen for your application. For standard M2 high-speed steel, we achieve a uniform hardness of 60–64 HRC through computer-monitored vacuum heat treatment. For HIP sintered PM steels, surface and core hardness levels are precisely tempered to balance maximum wear resistance with the core toughness needed to withstand mechanical shock.
We manufacture a full spectrum of element geometries, including single-flight, double-flight, and triple-flight conveying screws, as well as specialized SME, TME, and ZSK-style kneading blocks. We also produce narrow and wide kneading disks, reverse pitch elements, and transition blocks for stable pressure build-up.
Yes. If you are introducing challenging fillers, bio-plastics, or highly filled flame retardants, our technical team can recommend optimized screw element combinations. We assist with adjusting kneading block stagger angles (30°, 45°, 60°, 90°), reverse flights, and mixing blocks to balance shear rate, melt temperature, and residence time.
We accept Wire Transfer (T/T), Letter of Credit (L/C at sight), and standard B2B payment methods in USD, EUR, and RMB. Our sales team provides clear commercial invoices, packing lists, and certificates of origin (CO) for smooth customs clearance in your country.
Yes. We keep pre-machined raw blanks for common screw element sizes in stock. For urgent emergency repairs, we can fast-track production in our workshop and arrange express courier dispatch (DHL/FedEx/UPS) to minimize your factory downtime.
Every finished element and shaft undergoes ultrasonic cleaning, anti-rust oil coating, and vacuum plastic wrapping before packing. We use heavy-duty fumigated wooden crates with internal shock protection to prevent corrosion and physical damage during sea or air transit.
Key indicators include reduced output, higher melt temperatures, poor pigment mixing, or increased drive torque. If you notice clearance expansion, you can send us your current gap measurements or photos. Our engineering team provides free wear analysis to help you decide whether to replace individual elements or entire sets.
Yes. We manufacture complete barrel lines including closed barrels, feeding barrels, venting barrels, and side-feeding barrels. We supply solid barrels as well as bimetallic lined barrels with replaceable inserts, designed to resist abrasive glass fibers and corrosive additives.
We produce high-torque involute splined shafts, single/multi-keyway shafts, and custom profile core shafts. Manufactured from high-strength alloy steel with precise spline tooth grinding, our shafts handle extreme torsional loads while ensuring smooth slide-on fitting for your screw elements.
Our components are engineered for direct drop-in replacement on major global extruder platforms. We supply parts compatible with brands like Coperion (ZSK), Leistritz, Berstorff, Theysohn, Jwell, and others, covering screw diameters from lab sizes (12 mm–20 mm) up to industrial production scale (133 mm+).
