Model · Co-rotating twin screw KTE
KTE-52B Twin Screw Extruder
KTE-52B twin screw extruder: 51.4 mm, 500–600 rpm, B-class torque, 80–200 kg/h — the same economy class as the 50B with more free volume per turn.
KTE-52B 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-52B exists for one reason: free volume. Its 51.4 mm bore carries roughly 5% more channel volume than the 50.5 mm KTE-50B at the same motor class, which shows up on low-bulk-density powders and masterbatch carriers where output is volume-limited, not torque-limited.
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-52B | 51.4 | 500–600 | 55–75 | 2×720 | 80–200 |
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
The KTE-52B shares its power class (55–75 kW, 2×720 N·m) with the 52D's frame: the KTE-52D is the high-torque twin of this model. Against the smaller KTE-50B it is a volume upgrade; against the 62.4 mm KTE-65B it is the economy route to 200 kg/h-class output.
What it runs
Duties where the 52B lands: talc and CaCO3 masterbatch carriers, PP/PE colour masterbatch, powder-coating premix and low-density additives — anywhere the powder does not pack and the bottleneck is channel volume.
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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-52B 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
When does free volume matter more than torque?
On low-bulk-density powders — fumed silica, talc premix, some masterbatch carriers — the screw fills before the motor loads. Then the 52B outs output an equal-power 50B. Dense powders and glass fibre flip the argument to the 52D.
KTE-52B or KTE-65B for a first production line?
Below 200 kg/h target and above 300 kg/h target respectively. The 65B costs more but its 200–450 kg/h band is where most masterbatch plants settle within a year.
Is the 51.4 mm screw compatible with 50-series elements?
No — element geometry follows the bore. We stock both sizes; spare-part lead time for standard elements is 24–48 hours either way.
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-52B twin screw extruder — the short version
Note on KTE-52B 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-52B twin screw extruder: the data on this page was last verified on our own test line in Nanjing.
Not sure which KTE-52B twin screw extruder configuration fits? Describe the material and the pellet shape required — we answer with a recommendation, not a brochure.
A KTE-52B twin screw extruder from Kerke ships with CE documentation, a test-run record and a recommended spare set.
Related on this site: Extrusion lines by application · Extruder selection guide · free extrusion line quotation · Wikipedia: Twin-screw extruder