The prices of twin-screw extruder accessories vary significantly due to factors such as material, specification, brand, precision level, and purchase quantity. Based on 2025-2026 international market quotes (referencing data from platforms like Alibaba and CHINAPLAS), this document sorts out price ranges by core accessory categories to provide a reference for procurement and cost accounting.
I. Price Ranges of Core Functional Accessories
(I) Screw and Barrel Assemblies
Screws and barrels are the core components of extruders. Materials (such as nitrided steel and bimetallic alloys) and specifications (diameter, length-diameter ratio) are the key factors affecting prices, with a huge price gap between different types of products.
- Modular Screw Elements: The unit price ranges from 171.4 to 390 US dollars. Suitable for combined screw structures, most are made of wear-resistant alloys, and the unit price decreases with increasing purchase quantity.
- Integral Screws:
- Ordinary nitrided steel (for PE, PP processing): The unit price of a single screw is 500-550 US dollars/set (including basic barrel adapters), with a minimum order quantity of 1 set.
- Bimetallic alloy (for high wear resistance and high filling scenarios): The price is 200-300 US dollars/piece (minimum order of 10 pieces), and the price of an integral screw-barrel set can reach 2,300-2,500 US dollars/set.
- Barrels:
- Tapered twin-screw barrels (for PVC, WPC processing): 700-1,000 US dollars/set. Products made of 38CrMoAlA material with a hardness of 58-60HRC are priced at 1,900-1,980 US dollars/set.
- Parallel twin-screw barrels (for composite modification): 150-1,000 US dollars/set. For large specifications (75mm and above) with bulk purchase (minimum 10 pieces), the unit price can be as low as 280-300 US dollars/piece.
- Imported customized models (e.g., Theysohn CON 63, suitable for CPVC pipes): 3,000-3,130 US dollars/set, with a 3-month warranty.
(II) Power Transmission Accessories
1. Gearbox (Reducer)
Price differences mainly stem from torque level, precision, and brand, with a price gap of more than 10 times between Chinese and imported products.
- Ordinary Chinese-made: 260-450 US dollars/set for models suitable for small twin-screw extruders; 6,000-9,000 US dollars/set for medium and large high-torque models (special for parallel twin-screws), with a 1-year warranty.
- Precision Chinese-made: ZLYJ series (suitable for single/twin screws) 730-1,000 US dollars/set, minimum order quantity 1 set.
- Imported models (e.g., suitable for 75 twin-screw granulators): Unit price can reach 200,000-300,000 US dollars, and the price of complete sets with equipment is higher.
2. Motor
Mainly frequency conversion asynchronous motors, the price is positively correlated with power, suitable for different specifications of extruders:
- Motors for small laboratory machines (30-50mm screws) (15-37kW): Approximately 1,000-2,000 US dollars/unit.
- Motors for medium industrial machines (65-100mm screws) (55-160kW): 3,000-8,000 US dollars/unit. Special models for high-filler material processing require a 20%-30% price increase.
(III) Auxiliary System Accessories
1. Feeding System
- Volumetric feeder: 500-1,500 US dollars/unit for simple structure models, suitable for ordinary processing scenarios.
- Gravimetric feeder (precision ±0.5%): 3,000-6,000 US dollars/unit, suitable for multi-component material mixing and modification scenarios.
2. Vacuum and Cooling System
- Small vacuum pumps (for laboratory machines): 800-1,500 US dollars/unit; industrial-grade high-power vacuum pumps: 4,000-8,000 US dollars/unit.
- Cooling system: Air-cooled components (segmented type) 300-800 US dollars/set; water-cooled circulation system (including pipelines and radiators) 1,500-3,000 US dollars/set.
3. Heating Rod
The unit price of a segmented heating rod is 15-50 US dollars, and the total price of a set (3-5 segments) is 45-250 US dollars. The unit price of high-temperature resistant alloy material models can reach 80 US dollars/piece.
(IV) Protection and Control Accessories
- Safety clutch: 200-500 US dollars/unit for ordinary models; 800-1,500 US dollars/unit for high-precision overload protection models (suitable for high-torque equipment).
- Electrical control system (PLC + touch screen): 1,500-3,000 US dollars/set for basic models; 5,000-10,000 US dollars/set for high-end models with intelligent monitoring and fault early warning functions.
II. Key Factors Affecting Prices
(I) Material and Process
The price of wear-resistant and corrosion-resistant material accessories such as bimetallic alloys and nitrided steel is 2-5 times higher than that of ordinary steel; precision processing technologies (such as high-precision gears and modular threads) can increase the unit price by 30%-80%.
(II) Specification and Customization
The larger the screw diameter and the higher the length-diameter ratio, the exponential growth of accessory prices; customized accessories for special materials (such as biodegradable materials and high-filler materials) are 50%-150% more expensive than standard models.
(III) Brand and Origin
The price of imported brands (such as Theysohn and Weber) is 3-10 times that of high-quality Chinese products; the price of products from large Chinese manufacturers (such as Haitian and Lantai) is 20%-40% higher than that of small manufacturers, but the warranty period is longer (1-2 years vs 3-6 months).
(IV) Purchase Quantity
The minimum order quantity for most accessories is 1 set/piece. Bulk purchase (10 pieces and above) can enjoy a 10%-30% discount. For example, the unit price of 75mm screw barrels can be as low as 280 US dollars/piece for bulk purchase, while a single set purchase costs more than 500 US dollars.
III. Procurement Suggestions
- Ordinary processing scenarios (PE, PP ordinary products): Prioritize high-quality nitrided steel accessories made in China to balance cost and durability. The cost of a single set of core accessories (screw + barrel + gearbox) can be controlled at 5,000-10,000 US dollars.
- High-end modification scenarios (high-filler, wear-resistant materials): Select bimetallic alloy accessories and, if necessary, match with imported precision gearboxes. The cost of core accessories is about 15,000-30,000 US dollars.
- For bulk purchases, prioritize cooperation with direct Chinese manufacturers to obtain price discounts and extended warranty periods, reducing long-term maintenance costs.
Note: The above prices are 2025-2026 market reference prices. Affected by factors such as raw material price fluctuations and international logistics costs, the actual purchase price may fluctuate by ±15%.
