2026-08-15

Nitrogen Gas Spring Guide: Types, Applications and Advantages for Metal Stamping Dies

Introduction

In many industrial applications, nitrogen gas springs are a cost-effective and space-saving alternative to traditional metal coil springs.

Compared with conventional mechanical springs, nitrogen gas springs provide instant and relatively stable force throughout the entire stroke length. They are highly durable and do not gradually lose force due to metal fatigue over time.

Nitrogen gas springs operate by using compressed nitrogen gas inside a sealed cylinder. When nitrogen gas is compressed, energy is stored inside the cylinder. When external pressure is released, the piston rod is pushed outward by the expanding gas.

A small amount of lubricating oil is also sealed inside the cylinder to ensure smooth piston movement in both compression and return directions.

This article introduces different types of nitrogen gas springs, their applications, and the advantages of choosing nitrogen gas springs instead of traditional coil springs, especially for metal stamping die applications.

Types of Nitrogen Gas Springs

Nitrogen gas springs are one type of compression spring solution widely used in industrial applications.BBK-JINGBA provides various nitrogen gas spring solutions. This article focuses on:

1、BKC Series Ultra Short High Force Nitrogen Gas Spring

2、BKH Series Ultra Slim High Force Nitrogen Die Spring

BKC Series Ultra Short High Force Nitrogen Gas Spring

The BKC series is one of the most compact and powerful nitrogen gas springs available.

It features bottom mounting and side charging ports, allowing connection with nitrogen gas piping systems.

Technical Specifications

Force Range:250KGF - 20000KGF

Stroke:10mm - 125mm

Maximum Stroke Frequency:20-80 cycles/min (at 20℃)

Main Features

1. Extremely Compact Design with High Force Output

The BKC series provides high force output in a very small body size.When mold designers face strict limitations in both vertical height space and radial installation space, the BKC series becomes an ideal solution.

2. International Compatibility

BKC nitrogen gas springs are interchangeable with similar international products.

Compatible brands include:

·Kaller X / GX 、Dadco U、Hyson T3 / T3T、Misumi GSV

3. Easy Installation

BKC nitrogen gas springs are normally used independently and can be installed quickly without complicated assembly procedures.

4. Alternative to ISO Standard Gas Springs

For applications where long stroke length is not required, BKC provides performance comparable to ISO standard nitrogen gas springs.

BKH Series Ultra Slim High Force Nitrogen Die Spring

The BKH series is designed with an ultra-small cylinder diameter while providing high output force.

It is especially suitable for molds where radial space is extremely limited.

Technical Specifications：

Force Range:470KGF - 18300KGF

Stroke:6mm - 50mm

Maximum Stroke Frequency:50 cycles/min (at 20℃)

Main Features

1. Small Diameter with Powerful Force

The BKH series uses piston sealing technology and provides extremely high force output in a compact structure.

It is the preferred choice for mold designers requiring maximum force in limited installation space.

2. International Replacement Compatibility

Compatible brands include:

·Kaller CU4、DADCO SC、Hyson T2SC、Quiri RGC

3. Flexible Installation Options

BKH nitrogen gas springs can be used independently or connected into a nitrogen gas spring system with additional mounting bases.

Type comparison

Applications of Nitrogen Gas Springs

Nitrogen gas springs are widely used in:

1、Metal Processing and Forming

Applications include:

·Metal stamping

·Punching

·Forming dies

2、Plastic Injection Molding

Used for:

·Mold opening assistance

·Ejection systems

·Motion control

3、Automotive and Aerospace Manufacturing

Nitrogen gas springs provide reliable force control for:

·Automotive stamping dies

·Precision forming tools

·Aerospace components

Nitrogen Gas Springs in Metal Stamping Dies

One of the most important applications of nitrogen gas springs is metal stamping.

Special nitrogen die springs are installed between die plates to provide controlled force during opening and closing operations.

Compared with coil springs, nitrogen gas springs provide:

·Constant force output

·Better die clearance control

·Improved stamping accuracy

·Reduced material deformation

For modern high-speed stamping production, nitrogen gas springs are an efficient and reliable solution.

Advantages of BBK-JINGBA Nitrogen Gas Springs

1. Long Service Life and High Durability

BBK-JINGBA nitrogen gas springs feature:

·Precision machined piston rods

·Surface hardness above HV1000

·Hardness above HRC40

·Surface roughness below Ra0.02μm

·High-performance TSS sealing systems

These technologies ensure long operating life and stable performance.

After completing the effective stroke, pressure loss is less than 5%, meeting international performance requirements.

2. Reduce Mold Cost

Nitrogen gas springs provide:

·Compact size

·High force output

·Constant pressure

·Long service life

Benefits:

·Save mold installation space

·Reduce the number of springs required

·Reduce maintenance frequency

·Lower total mold cost

3. Safety and Reliability

Safety is a key design consideration.

BBK-JINGBA nitrogen gas springs include:

·Safety pressure relief structures

·Integrated machining technology

·Advanced manufacturing processes

Compared with traditional welded tube structures, integrated machining improves reliability and safety.

Nitrogen Gas Spring vs Coil Spring Advantages

Higher Force in Smaller Space

A compact:

·BKH50.0-025-135 nitrogen gas spring

can replace approximately:

14 heavy-duty coil springs

Equivalent comparison:

·Cylinder diameter: 75mm

·Stroke: 25mm

Space Saving Advantages

Installation Area

Nitrogen gas spring:

44.16 cm²

Coil springs:

247.75 cm²

Space saving:

Nearly 6 times smaller.

Lower Installation Height

Nitrogen gas spring:

135mm

Coil spring:

280mm

Reduced Installation Space

Nitrogen gas spring:

596.16 cm²

Coil spring system:

7963 cm²

Compared with installing 14 coil springs, one nitrogen gas spring does not require:

Pre-compression

Additional guiding

Positioning operations

Balanced Force Control System

When multiple nitrogen gas springs are connected through a piping system, all springs maintain the same internal gas pressure.

This creates balanced force distribution.

Compared with coil springs, nitrogen systems provide:

Benefits:

1、Equal force at every contact point

2、Adjustable spring force according to production requirements

3、Real-time pressure monitoring

4、Reduced mold maintenance and downtime

5、Longer service life of punches and tooling components

Adjustable Pressure

The initial force of nitrogen gas springs can be adjusted by changing internal nitrogen pressure.

For connected systems, pressure adjustment can be achieved through control panels.

Maximum operating pressure:

150 bar

Unlike coil springs, nitrogen gas springs provide adjustable force control.

Conclusion

Nitrogen gas springs provide a modern solution for metal stamping dies, injection molds and industrial tooling applications.

Compared with traditional coil springs, they offer:

·Higher force density

·Smaller installation space

·Longer service life

·Adjustable pressure

·Better safety

·Improved production efficiency

As a professional nitrogen gas spring manufacturer, BBK-JINGBA provides BKC, BKH, ISO standard and customized nitrogen gas spring solutions for global mold manufacturers.

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