Model · Co-rotating twin screw KTE
KTE-50D Twin Screw Extruder
KTE-50D: the 50.5 mm screw with D-class torque (2×860 N·m, 300–800 rpm) — 100–300 kg/h for high-filler, glass-filled and reactive duties that overload a B-class small line. A reference KTE-50D twin screw extruder page from Kerke.
KTE-50D twin screw extruder — workshop photo 1, Kerke workshop, Nanjing
Co-rotating twin screw KTE — workshop photo 2, Kerke workshop, Nanjing
Co-rotating twin screw KTE — workshop photo 3, Kerke workshop, Nanjing
Co-rotating twin screw KTE — workshop photo 4, Kerke workshop, Nanjing
Co-rotating twin screw KTE — workshop photo 5, Kerke workshop, Nanjing
Co-rotating twin screw KTE — workshop photo 6, Kerke workshop, NanjingQuick answer
The KTE-50D is for small-scale duty with production-grade severity: glass-fibre compounding at 20–40%, filler masterbatch above 85%, TPU and reactive systems that need torque headroom. Same floor space as the KTE-50B, roughly 50% more output and twice the torque.
Workshop photos and a running video — shot on our own lines, not stock images.
Parameters
| Model | Dia. (mm) | Speed (rpm) | Motor (kW) | Torque (N·m) | Output (kg/h) |
|---|---|---|---|---|---|
| KTE-50D | 50.5 | 300–800 | 75–90 | 2×860 | 100–300 |
Reference output measured on the stated material family; subject to a material trial. Motor and torque values are per machine, not per screw shaft.
Where it fits in the range
Within the 50 mm class the KTE-50D is the high-torque option: 2×860 N·m against 2×525 N·m on the KTE-50B, and 300–800 rpm speed range for shear control. Next sizes up are the KTE-52D (2×1,050 N·m, 100–400 kg/h) and the 62.4 mm KTE-65D at 350–600 kg/h.
What it runs
Bought for: glass fibre PA/PP compounds, 85–88% filler masterbatch where a B gearbox stalls, TPU reactive extrusion, and engineering compounds where formulation changes weekly and torque headroom protects the schedule.
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Configuration options
Every KTE ships as a building-block system: screw elements on splined shafts, barrel modules that accept side feeders, liquid injection and vacuum vents, so the geometry is set by the formulation rather than fixed at the factory. Three choices define a KTE-50D quotation: the L/D (32–36 for simple filling, 40–48 with side feed and devolatilization, 52–60 for reactive duties), the wear package (standard 38CrMoAlA or bimetallic liner with PM/HIP elements where CaCO3, talc or glass fibre grind), and the pelletizing head (strand, water ring, air-cooled hot face or underwater — matched to the polymer, not to the model number).
FAQ
Why pick a 50D over a bigger 65B at similar price?
Torque, not tonnage: the 50D carries 2×860 N·m on a small frame, so high-filler and glass recipes run with margin. A 65B gives more kg/h but B-class torque — the choice is duty first, output second.
What output should I plan for on glass fibre?
Reference 100–300 kg/h covers the range; glass-filled PA typically lands 30–40% below the masterbatch figure because of feeding and die pressure. We confirm on a trial with your own chips.
Does the 300–800 rpm range matter?
Yes for shear-sensitive work: low rpm with high torque keeps melt temperature down on reactive and XLPE-type duties; high rpm lifts output on easy formulations. The D gearbox makes both usable.
Where these numbers come from
Parameters come from the Kerke parameter table and product master data sheet, cross-checked against commissioning records for the same model and duty. Where a catalogue value and a trial value disagree, the trial value is the one we quote.
Reviewed by the Kerke process team, Nanjing. Page updated 6 November 2026.
Send 25–50 kg — we return pellets, a video and a report with the parameters we used, in 3–7 days.
KTE-50D twin screw extruder — the short version
Note on KTE-50D twin screw extruder: what separates one machine from another is torque class, L/D and the wear package matched to your material, not the build standard. Shortlist from the tables, then confirm the choice on a trial with your own powder.
Planning an upgrade this quarter? Send the material and the target output — the configuration comes back within one working day.
Every quotation lists the wear package as a separate line, so its cost is visible from day one.
Questions are answered the same day, in English or Chinese.
Note on KTE-50D twin screw extruder: the data on this page was last verified on our own test line in Nanjing.
Not sure which KTE-50D twin screw extruder configuration fits? Describe the material and the pellet shape required — we answer with a recommendation, not a brochure.
A KTE-50D twin screw extruder from Kerke ships with CE documentation, a test-run record and a recommended spare set.
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