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40mm Nissei Screw - Available Now - www.completeplastics.com

  • Heat Tech
  • Feb 26
  • 3 min read

770-417-6983 / sales@completeplastics.com. Finding the right screw for your Nissei injection molding machine can make a big difference in performance and product quality. The 40mm Nissei screw with an overall length of 37.40 inches (about 950mm) fits many mid-range machines and offers a reliable balance of throughput and precision. This post explores the key features, compatible models, and technical details of this screw to help you decide if it suits your molding needs.


Close-up view of a 40mm Nissei screw with detailed threading and tip assembly
40mm Nissei screw with 37.40-inch length, showing thread and tip design

Compatible Nissei Machine Models


The 40mm screw is a standard component for several Nissei injection molding machines, especially in the FN and NEX series. Here are some specific models where this screw fits perfectly:


  • FN Series (Hybrid/Hydraulic)

- FN3000-25A: This model specifically uses the 40mm screw.

- FN2000-25A: Offers options including 40mm, 45mm, or 50mm screws, with 40mm being common.

- FNX110-12A: A 123-ton hybrid machine that frequently uses the 40mm general-purpose screw.


  • NEX Series (All-Electric)

- NEX-140-25E: This 140-ton machine comes standard with the 40mm screw for high performance.

- NEX-V / NEX-IV Series: Mid-range tonnage models (approximately 110 to 180 tons) often use the 40mm screw to balance speed and precision.


  • Vertical Series

- TNX-RIII Series: Hybrid vertical machines ranging from 50 to 150 tons often list the 40mm screw as standard.


These models benefit from the screw’s ability to handle a variety of materials and processing conditions, making it a versatile choice for many production environments.


Key Technical Specifications


Understanding the technical specs of the 40mm Nissei screw helps clarify why it fits so well in these machines:


  • Diameter: 40mm

  • Overall Length: 37.40 inches (approximately 950mm)

  • Length-to-Diameter (L/D) Ratio: Typically 18:1 or 20:1, which is standard for general-purpose processing in Nissei machines. This ratio supports efficient melting and mixing of plastic materials.

  • Tip Assembly: Usually paired with a 3-piece free-flow tip featuring a TR24 x 3.0mm left-hand thread. This design helps maintain consistent material flow and reduces wear.


The screw’s length and diameter combination ensures it can process a wide range of resins while maintaining stable melt quality. The L/D ratio is critical because it affects the screw’s ability to convey, compress, and melt the plastic efficiently.


Why Choose the 40mm Nissei Screw?

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Selecting the right screw size impacts your molding process in several ways:


  • Material Compatibility: The 40mm screw handles common thermoplastics well, including ABS, polypropylene, and nylon. It supports both general-purpose and engineering-grade materials.

  • Balanced Throughput and Precision: This screw size strikes a good balance between output rate and product detail, making it ideal for mid-range tonnage machines.

  • Durability and Maintenance: The 3-piece tip assembly allows for easier maintenance and replacement of worn parts without changing the entire screw. This reduces downtime and maintenance costs.

  • Versatility: Compatible with multiple Nissei models, it offers flexibility if you operate different machines or plan to upgrade.


How to Order and Get Support


If you need a 40mm Nissei screw with a 37.40-inch length, www.completeplastics.com is a reliable source. They provide quality parts and support for injection molding equipment.


Their team can help you confirm compatibility with your machine model and assist with ordering or technical questions.


Practical Tips for Installation and Use


When installing a 40mm Nissei screw, keep these points in mind:


  • Check Machine Specifications: Confirm your machine model matches the screw size and length to avoid fitment issues.

  • Inspect the Tip Assembly: Ensure the 3-piece free-flow tip is properly installed and threads are secure to prevent leaks or material degradation.

  • Monitor Wear Regularly: Screws wear over time, especially in high-volume production. Regular inspection helps maintain product quality and prevents unexpected downtime.

  • Use Proper Lubrication: Follow manufacturer guidelines for lubrication during installation and operation to extend screw life.


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