High-Performance Gas Springs for Precision Die Applications

The BKJ Series nitrogen gas springs are engineered for high-load stamping dies, progressive tooling, and industrial mold applications.

Designed with advanced sealing technology (TSS sealing system) and optimized internal structure, BBK gas springs provide:

● Stable force output throughout the stroke 

● Long service life with minimal pressure loss 

● Reliable performance under high-frequency operation 

👉 Ideal replacement for European brands with better cost-performance and faster delivery

Understand technical parameters：

Note: When placing an order, please try not to select the models marked with "★".

Typical Applications：

The BKJ Series comprises short height versions of the TU Series.

The BKJ springs have an initial force ranging from 4,500 to 15,000 N.

They are 35 to 50 mm shorter than the corresponding BKB models.

● Automotive stamping dies

● Metal forming tools

● Progressive dies

● Plastic injection molds

● Robotic automation systems

FAQs

1. How to select the appropriate air spring model?

Core 3 steps:

① Computing power (actual demand + 15%-20% safety margin);

② Selecting stroke (working stroke + 5-10mm margin, no overpressure limit);

③ Selecting boost ratio (simple process 1.2-1.4, deep forming 1.5-2.0), and it can be selected based on installation space and working conditions. 

2. Working Principle of Nitrogen Springs

Using high-purity and high-pressure nitrogen gas as the energy storage medium, the compression during mold closing and the expansion and rebound during mold opening achieve compact structure and strong elasticity. It replaces traditional springs and simplifies the mold structure.

3. Force and Travel Curve Explanation

The initial force (F₁) is the full extension base elasticity, and the terminal force (F₂) is the maximum elasticity within the rated stroke. The pressure ratio K = F₂/F₁. The greater the stroke, the steadily increasing elasticity, which is suitable for various stamping processes. 

4. Installation Options

Four standard models, covering all scenarios:

① Bottom installation (common and mainstream, simple and convenient);

② Flange installation (for heavy loads, stable and shock-resistant);

③ Slot embedding (convenient for space-saving and quick assembly/disassembly); 

5. CAD/PDF Download

You can directly obtain the 2D/3D drawings and PDF product catalogues of the corresponding model by visiting the product center or download section on the official website (www.bbkspring.com); if not found, you can also contact BBK technical support for assistance.

Why Choose BBK Gas Springs?

Compared to international brands:

● Faster delivery (China manufacturing advantage)

● Competitive pricing

● Custom design support

● Proven sealing system (TSS technology)

● 18+ years manufacturing experience

Get Free Selection Support

Not sure which model fits your application?

👉 Contact BBK engineers for:

● Force calculation

● Model recommendation

● CAD drawing