In the ever-evolving world of medical device manufacturing precision, safety and efficiency are not optional - they are essential. At STPLMT, we understand the critical role of balloon necking in catheter production. That's why we’re proud to introduce the SBN-5 Vertical Necking Machine - a next-generation solution engineered to transform the pre-forming process of balloon tubes.
Balloon necking is a vital pre-forming process that reduces the diameter of tubing before balloon forming. This step is crucial for medical applications, where dimensional accuracy directly impacts device performance and patient outcomes. Traditionally, necking has required additional calibration steps, adding time and complexity to production.

Designed with advanced automation and operator safety in mind, the SBN-5 delivers unmatched consistency and throughput. By eliminating the need for post-necking calibration, it significantly streamlines the manufacturing process freeing up valuable resources while maintaining tight tolerances.
Key Features at a Glance
• 5-Up Necking Capability
Process up to five tubes simultaneously for exceptional throughput.
• Touchscreen Control Interface
Intuitive user interface allows for easy operation and monitoring.
• Pneumatically Actuated Clamps
Ensures secure and uniform tube holding for consistent results.
• Mass Flow Controller
Delivers precise gas flow (±1% accuracy), enabling controlled, uniform heating.
• Wide Compatibility
Supports tube diameters from 0.4 mm to 7.5 mm and balloon sizes ranging from 1.5 mm to 33 mm.
• High-Temperature Operation
Temperature range up to 250°C with ±0.5°C accuracy to suit diverse materials.
• Travel Accuracy of ±0.1 mm
Guarantees precise and repeatable positioning during the necking process.
• Safety Light Curtain
Ensures operator protection with real-time interruption monitoring.
• Network-Ready
Integrates seamlessly into modern smart manufacturing environments.
| Clamping System | Pneumatically actuated clamp for secure tube holding. |
|---|---|
| Gas Flow Control | Mass Flow Controller (50 nl/min ±1%) |
| Motion System | 2 linear slides with ball screw spindle & servo motors (1.8 N m), positional accuracy ±0.1 mm. |
| Travel Distances | Upper: 800 mm, Lower: 750 mm |
| Temperature Control | 20–250°C with ±0.5°C accuracy. |
| Air Pressure Requirement | 6-10 bar for reliable operation. |
| Cycle Time | 1-3 minutes per tube. |