40mm Nissei Barrel - Available Now - www.completeplastics.com
- Heat Tech
- Feb 26
- 3 min read
Finding the right replacement barrel for your Nissei injection molding machine can be challenging. The 40mm Nissei barrel with an overall length of 38.19 inches is a popular choice for many mid-range machines. This barrel size fits several Nissei series, making it a versatile and reliable option for maintaining or upgrading your equipment. If you need a high-quality replacement barrel, www.completeplastics.com offers this exact specification, backed by expert support and fast delivery.

Close-up of a 40mm Nissei injection molding barrel with an overall length of 38.19 inches
What Makes the 40mm Nissei Barrel a Standard Choice?
The 40mm diameter barrel with a length of 38.19 inches (approximately 970mm) is a standard specification widely used across several Nissei injection molding machine models. This size balances plasticizing capacity and machine footprint, making it ideal for medium-tonnage applications.
This barrel size is especially common in:
Nissei FN Series (Hybrid Machines)
Nissei FNX Series (Hybrid Machines)
Nissei NEX Series (All-Electric Machines)
Nissei PS & PN Series (Older Hydraulic Models)
Vertical Machines like TNX-RIII and PS40
Each series uses this barrel size for specific machine configurations, which we will explore next.
Nissei FN Series Uses for the 40mm Barrel
The FN series is known for hybrid injection molding machines that combine hydraulic and electric components. The 40mm barrel fits medium-tonnage units, particularly:
FN2000-25A
FN3000-25A
FN-4000-25A
These models often require barrels with this exact diameter and length for optimal performance. The 25A injection unit code is a key identifier for compatibility.
FNX Series and Its Barrel Applications
The FNX series includes hybrid machines designed for higher tonnage ranges, typically between 80 and 180 tons. Models like the FNX-III and FNX-IV use the 40mm barrel in their injection units to achieve efficient plasticization and injection speed.
This barrel size supports the balance between injection pressure and shot volume, making it a preferred choice for these machines.
Nissei NEX Series and High-Speed Electric Machines
The NEX series represents Nissei’s all-electric injection molding machines. The 40mm barrel is common in the NEX-IV and NEX-V models, especially in the 80-ton to 110-ton range.
Electric machines benefit from this barrel size because it supports high-speed plasticization, which is essential for precision and cycle time reduction.
Legacy Hydraulic Models Using the 40mm Barrel
Older hydraulic models like the PS and PN series also use the 40mm barrel. These include:
PS40 and PS60: Horizontal hydraulic machines
PN40 and PN60: Hydraulic units in the 40-ton to 60-ton range
NS40: Horizontal precision machines
These legacy machines still rely on this barrel size for consistent performance and ease of replacement.
Vertical Machines and Barrel Compatibility
Vertical injection molding machines such as the TNX-RIII series and older PS40 vertical units may use the 40mm barrel when equipped with larger injection units like the 25A or 36A.
This barrel length supports vertical machines that require precise injection control and consistent melt quality.
How to Verify Barrel Compatibility
Before ordering a replacement barrel, verify your machine’s injection unit code. This code is usually found on the machine’s ID plate and indicates the injection unit size.
Most 40mm barrels with a 38.19-inch length fall under the 25A injection unit specification.
Confirming this code ensures you get a barrel that fits perfectly without modification.
If you are unsure, contact www.completeplastics.com at sales@completeplastics.com or call 770-417-6983 for expert assistance.
Why Choose www.completeplastics.com for Your 40mm Nissei Barrel?
Complete Plastics specializes in replacement parts for injection molding machines. Their 40mm Nissei barrels meet strict quality standards and come with:
Precise manufacturing tolerances for a perfect fit
Durable materials that withstand high temperatures and pressures
Fast shipping to minimize machine downtime
Knowledgeable customer support for technical questions
Ordering from Complete Plastics ensures you get a barrel that restores your machine’s performance and reliability.
Practical Tips for Installing Your Replacement Barrel
Installing a new barrel requires care to avoid damage and ensure proper operation:
Clean the injection unit thoroughly before installation
Inspect the screw and barrel for wear or damage
Use proper tools to avoid scratches or dents on the barrel surface
Follow manufacturer torque specifications when tightening
Test the machine with a small run to verify melt quality and injection pressure
Proper installation extends barrel life and maintains product quality.
Summary
The 40mm Nissei barrel with a 38.19-inch length is a widely used replacement part for many Nissei injection molding machines, including hybrid, electric, hydraulic, and vertical models. Its compatibility with multiple series like FN, FNX, NEX, PS, and PN makes it a versatile choice for medium-tonnage applications.
To ensure you get the right barrel, check your machine’s injection unit code, typically 25A for this size. www.completeplastics.com offers high-quality 40mm barrels with expert support and fast delivery, helping you keep your machines running smoothly.



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