Home/Machines/Co-rotating twin screw KTE

Machine · Co-rotating twin screw KTE

Co-Rotating Twin Screw Extruder (KTE-50B to KTE-135D)

Fifteen models from 50.5 mm to 135 mm, two gearbox classes and a custom L/D for every formulation. Most customers only need one decision explained clearly: B or D. A reference co-rotating twin screw extruder page from Kerke.

Updated 6 November 2026

Scope 80–4,000 kg/h, B and D Gearboxes

Delivery 30–45 working days

Voltage built for destination

Co-rotating twin screw KTE — 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, Nanjing

Running video — Co-rotating twin screw KTE, Kerke workshop

Quick answer

The KTE twin screw range runs from 50.5 mm to 135 mm screw diameter at 80–4,000 kg/h. Two gearbox classes: B (T/A³ 6–8) for general masterbatch and compounding, D (T/A³ 8–12) for high filler, glass fibre and high output. L/D is custom from 28 to 60.

80–4,000 kg/houtput range

28–60custom L/D

2 gearbox classesB / D

Workshop photos and a running video — shot on our own lines, not stock images.

Parameter table

**Table 1.** Co-rotating twin screw KTE — models and reference output.
Model	Dia. (mm)	Speed (rpm)	Motor (kW)	Torque (N·m)	Output (kg/h)
KTE-50B	50.5	500–600	55–75	2×525	80–200
KTE-50D	50.5	300–800	75–90	2×860	100–300
KTE-52B	51.4	500–600	55–75	2×720	80–200
KTE-52D	51.4	500–600	75–110	2×1050	100–400
KTE-65	62.4	500	75–90	2×720	100–350
KTE-65B	62.4	500–600	90–110	2×860	200–450
KTE-65D	62.4	300–800	132–160	2×1530	350–600
KTE-75	71	300–800	110–132	2×1050	300–500
KTE-75B	71	500–600	132–160	2×1530	300–800
KTE-75D	71	300–800	200–315	2×2100	500–1000
KTE-85B	85	500–600	220–315	2×2100	550–1000
KTE-95B	93	500–600	250–315	2×3000	800–1500
KTE-95D	93	500–800	315–500	2×4800	1000–2000
KTE-135B	135	500–600	315–500	2×4800	1500–3000
KTE-135D	135	500–800	500–1000	2×7800	1500–4000

Reference output measured on the stated material family; subject to a material trial. Motor and torque values are per machine, not per screw shaft.

B or D: the only decision that really matters

B-class gearboxes (T/A³ 6–8) are the volume product: filler and colour masterbatch up to 85%, general compounding, plenty of torque margin for the price. D-class (T/A³ 8–12) exists for two jobs — high filler above 85% and glass-fibre reinforcement, where the machine must push a very viscous melt without stalling.

Same 65 mm screw, three different machines:

Model	Torque	What it can do	Where it stops
KTE-65	2×720 N·m	Colour masterbatch, filling to 75%	High filler above 80%
KTE-65B	2×860 N·m	Filler masterbatch to 85%, compounding	88%+ filling, glass fibre at high output
KTE-65D	2×1530 N·m	High filler, PA/PBT + 30–50% GF, 350–600 kg/h	—

Screw and barrel

Building-block screws in W6Mo5Cr4V2 (M2 HSS) as standard, bimetallic liner in the barrel, 40CrNiMo shaft. For abrasive filler and glass fibre we specify a bimetallic barrel plus PM (powder metallurgy) screw elements — this is a wear package, not a marketing option.

Ordering notes

L/D 28–60 is chosen per formulation: 32–36 simple filling, 40–48 reinforcement plus devolatilization, 52–60 reactive extrusion.
Voltage and frequency are built for the destination country.
Standard delivery 30–45 working days; custom ODM 45–70.

What this machine is normally bought for

Filler Masterbatch Extruder Line

Filler masterbatch is sold by the tonne, so the line is judged on two numbers only: how much powder it can swallow, an…

85–90% CaCO₃ at 350–550 kg/h

Color Masterbatch Extruder Line

Colour masterbatch is a dispersion business with a cleaning problem attached: the same line has to make 20% pigment di…

Screw Design & Pelletizing

Engineering Plastics Compounding Line

Engineering plastics punish shortcuts in two places: drying (PA and PC want 120 °C for four hours, not 80 °C overnight…

PA, PC, PBT, ABS & Alloys

Plastic Compounding Extrusion Line

Compounding covers everything from 20% glass fibre in PA6 to 3% additive in PP. The first question is never tonnage bu…

50–4,000 kg/h

FAQ

How do I choose between B and D gearbox?

B (T/A³ 6–8) covers filler and colour masterbatch up to 85% and general compounding at the best price per kg/h. D (T/A³ 8–12) is for high filler above 85%, glass fibre and high output. Same 65 mm screw, 2×860 N·m against 2×1,530 N·m.

What L/D should I specify?

32–36 for simple filling, 40–48 when side feeding and devolatilization are needed, 52–60 for reactive extrusion. The formulation sets it; a longer screw is not automatically better.

What is the delivery time?

30–45 working days for standard models, 45–70 for ODM configurations. Voltage and frequency are built for the destination country.

Where these numbers come from

Screw diameters, speeds, motor ratings, torque and reference output come from the Kerke parameter table and the product master data sheet, and are cross-checked against commissioning records. 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.

Need a capacity number for your material?

Send 25–50 kg — we return pellets, a video and a report with the parameters we used, in 3–7 days.

Get a quote Send material for trial

Co-rotating twin screw extruder — the short version

Note on co-rotating 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 co-rotating twin screw extruder: the data on this page was last verified on our own test line in Nanjing.

Not sure which co-rotating twin screw extruder configuration fits? Describe the material and the pellet shape required — we answer with a recommendation, not a brochure.

A co-rotating twin screw extruder from Kerke ships with CE documentation, a test-run record and a recommended spare set.