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In roll-to-roll production processes—where consistent, precise tension control at the unwind end is critical to product quality and operational efficiency—selecting the right braking solution can make all the difference. Handong Machinery is proud to introduce our high-performance pneumatic brake, a direct and superior replacement for the Nexen BSB Series, engineered specifically to master unwind tension control and elevate your production capabilities.
Designed as a seamless drop-in replacement, our pneumatic brake matches the mounting dimensions, torque range, and operational compatibility of the Nexen BSB Series, eliminating the need for costly machine modifications or complex retrofits. Whether you’re upgrading existing equipment or seeking a reliable alternative for new installations, this brake ensures a smooth transition while delivering enhanced tension control performance that exceeds industry standards.
Precision Tension Control: The Core of Unwind Excellence
At the heart of our pneumatic brake lies advanced tension control technology, tailored to address the unique challenges of unwind applications. Unlike traditional braking mechanisms that struggle with tension fluctuations caused by varying bobbin diameters, friction-induced heating, or transient disturbances, our brake integrates real-time feedback and dynamic adjustment to maintain constant, stable tension throughout the entire unwind process .
Key to its superior performance is a high-frequency control system that operates with exceptional responsiveness—adjusting brake torque in milliseconds to counteract tension variations before they affect product quality. This dynamic control ensures that even sensitive materials, such as nonwovens, films, textiles, or wires, are unwound with minimal stretch, undulation, or breakage, preserving material integrity and reducing waste .
Engineered for Reliability: Built to Outperform the Nexen BSB Series
While matching the Nexen BSB Series’ core functionality, Handong’s pneumatic brake incorporates enhanced design features to deliver greater durability, easier maintenance, and more consistent tension control:
- Wide Torque Range & Linear Control: Our brake offers a broad, adjustable torque range—controlled by precise air pressure regulation—ensuring compatibility with a wide variety of unwind applications, from light-load delicate materials to heavy-load industrial webs . The linear relationship between air pressure and torque allows for intuitive, repeatable tension settings, reducing operator error and ensuring consistent performance shift after shift .
- Superior Heat Dissipation: Equipped with a multi-disc design and integrated cooling fins, the brake efficiently dissipates heat generated during continuous slip operation—addressing a common pain point in high-cycle, heavy-load applications . This enhanced thermal capacity prevents overheating, which can cause friction material degradation and tension inconsistency, extending the brake’s service life and reducing maintenance downtime .
- Low-Maintenance Design: The friction facings are thick, long-lasting, and easily replaceable without removing the brake from the machine—mirroring the convenience of the Nexen BSB Series while improving durability . An external wear indicator allows operators to quickly assess when maintenance is needed, minimizing unplanned downtime and simplifying upkeep .
- Seamless Compatibility: Designed to fit both shafted and shaft-less unwind systems, our brake adapts to your existing setup with minimal effort . It supports standard mounting configurations and air connections, ensuring plug-and-play integration with your current tension control systems—whether you use load cells, dancers, or automatic controllers .
Industry 4.0-Ready: Smart Tension Control for Modern Production
Aligned with Industry 4.0 principles, Handong’s pneumatic brake is compatible with automatic tension control systems, allowing for real-time tension monitoring and adaptive adjustment . It can be integrated with digital controllers that automatically sense roll diameter changes and adjust brake torque accordingly—eliminating the need for manual re-calibration and reducing operator workload . This smart integration ensures consistent tension even as roll diameter decreases, maintaining product quality from full roll to core .
Applications Across Industries
Ideal for any unwind tension control application where the Nexen BSB Series is used, our pneumatic brake excels in industries such as:
- Converting (film, paper, foil, tape)
- Textile and nonwoven manufacturing
- Printing and packaging
- Wire and cable production
- Rubber and plastic processing
In each application, the brake delivers the stable, precise tension needed to optimize production efficiency, reduce material waste, and ensure consistent end-product quality .
Why Choose Handong’s Replacement for Nexen BSB Series?
When selecting Handong’s pneumatic brake as a replacement for the Nexen BSB Series, customers are not merely opting for a compatible alternative—they are investing in a sophisticated solution that integrates the reliability of the original series with enhanced performance capabilities, reduced maintenance costs, and expanded operational flexibility. Handong Machinery’s unwavering commitment to engineering excellence ensures that each pneumatic brake adheres to stringent quality standards, supported by comprehensive technical assistance designed to maximize equipment uptime and overall production productivity.
For unwind tension control that you can trust—consistent, efficient, and built to last—Handong’s pneumatic brake is the superior choice. Contact us today to learn more about how this replacement for the Nexen BSB Series can elevate your production processes.
Qualifications
营业执照
The NAB series pneumatic brakes are air-actuated, normally open safety braking devices designed for tension control, emergency stopping, and overload protection in printing, packaging, wire & cable, textile, and machine tool applications.
| Model | Torque (N·m) @ 0.6MPa | Max. Rotation Speed (r/min) | Moment of Inertia (kg·m²) | Allowable Friction Plate Abrasion (cm³) | Air Chamber Volume (cm³) | Weight (kg) |
|---|---|---|---|---|---|---|
| NAB5 | 53 | 3600 | 9.69×10⁻⁴ | 14.74 | Min:10.31 / Max:23.31 | 3.5 |
| NAB10 | 100 | 2800 | 4.59×10⁻³ | 25.12 | Min:16.78 / Max:34.55 | 6.6 |
| NAB20 | 216 | 2200 | 1.694×10⁻² | 58.05 | Min:17.03 / Max:54.20 | 12 |
| NAB40 | 510 | 1800 | 4.74×10⁻² | 146.6 | Min:28.50 / Max:141.9 | 25 |
| NAB65 | 636 | 1600 | 1.076×10⁻¹ | 299.8 | Min:34.54 / Max:193.9 | 36 |
- Torque Adjustment: Torque is linearly adjustable via operating air pressure (0.3–0.6 MPa).
- Air Chamber Volume:
Vn= new friction plate condition;Vo= before friction plate replacement.
2. Main Dimensions (mm)
Brake Body Dimensions
| Model | A(H7) | B | C | D | E | F | G | H | J | K | L | M | Port |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| NAB5 | 25 | 150 | 68.5 | 27.8 | 117 | 12 | 6.5 | 34.5 | 64 | PT1/4 | 135 | 7 | PT1/4 |
| NAB10 | 35 | 182 | 79.5 | 38 | 155 | 12 | 10 | 44 | 77 | PT1/4 | 165 | 9 | PT1/4 |
| NAB20 | 50 | 228 | 96 | 57 | 204 | 11 | 10 | 47 | 87 | PT1/4 | 210 | 9 | PT1/4 |
| NAB40 | 75 | 302 | 120 | 83 | 256 | 18 | 13 | 58.5 | 114 | PT1/4 | 278 | 14 | PT1/4 |
| NAB65 | 75 | 350 | 134 | 83 | 280 | 20 | 18 | 70 | 141 | PT1/4 | 320 | 18 | PT1/4 |
Shaft & Keyway Dimensions
| Model | N | P | T | U | Keyway (mm) |
|---|---|---|---|---|---|
| NAB5 | 10 | 16.5 | 6 | 27.8 | 6×6×25 |
| NAB10 | 16 | 17 | 10 | 38.3 | 10×8×30 |
| NAB20 | 20 | 17 | 12 | 53.3 | 12×8×45 |
| NAB40 | 22 | 22 | 18 | 79.4 | 18×11×65 |
| NAB65 | 25 | 30 | 18 | 79.4 | 18×11×65 |
Conical Shaft Spanned Tube (Taper 1/16)
| Tube Model | A | B | C | D | T | U | Compatible Brake Model |
|---|---|---|---|---|---|---|---|
| TB25-10D | 10 | 52 | 25.5 | 8 | – | – | NAB5+TB25-10D |
| TB25-20 | 20 | 52 | 25.5 | 8 | 5 | 22.3 | NAB5+TB25-20 |
| TB25 | 25 | 52 | 25.5 | 8 | 6 | 27.8 | NAB5 |
| TB35-10D | 10 | 68 | 32 | 10 | – | – | NAB10+TB35-10D |
| TB35-25 | 25 | 68 | 32 | 10 | 6 | 27.8 | NAB10+TB35-25 |
| TB35 | 35 | 68 | 32 | 10 | 10 | 38.3 | NAB10 |
| TB50-20D | 20 | 98 | 48 | 13 | – | – | NAB20+TB50-20D |
| TB50-35 | 35 | 98 | 48 | 13 | 10 | 38.3 | NAB20+TB50-35 |
| TB50 | 50 | 98 | 48 | 13 | 12 | 53.3 | NAB20 |
| TB75-20D | 20 | 149 | 66 | 19 | – | – | NAB40/NAB65+TB75-20D |
| TB75-50 | 50 | 149 | 66 | 19 | 12 | 53.3 | NAB40/NAB65+TB75-50 |
| TB75 | 75 | 149 | 66 | 19 | 18 | 79.4 | NAB40/NAB65 |
3. Response Time (ms)
Test conditions: standard 3/4-way solenoid valve, 200mm air line (1/4" diameter), PT1/8 metal joint, rapid exhaust valve
| Air Pressure (MPa) | Model | 3-way Valve (t₁/t₂⁵⁰/t₂¹⁰⁰/t₉/t₄⁵⁰/t₄⁰) | 4-way Valve (t₁/t₂⁵⁰/t₂¹⁰⁰/t₉/t₄⁵⁰/t₄⁰) |
|---|---|---|---|
| 0.3 | NAB5 | 56/92/160/16/50/70 | 21/33/55/12/15/26 |
| NAB10 | 74/110/193/16/50/75 | 26/45/74/12/21/36 | |
| NAB20 | 113/143/260/14/51/77 | 28/73/118/12/34/60 | |
| NAB40 | 205/210/390/17/53/80 | 34/126/225/11/65/120 | |
| NAB65 | 209/226/415/13/54/85 | 36/136/239/11/72/133 | |
| 0.4 | NAB5 | 48/118/203/16/62/75 | 19/32/51/13/18/41 |
| NAB10 | 64/118/203/17/62/80 | 23/42/68/12/26/68 | |
| NAB20 | 97/153/273/18/82/90 | 25/69/110/12/42/88 | |
| NAB40 | 175/225/410/20/65/95 | 30/118/205/11/80/136 | |
| NAB65 | 176/244/435/14/66/95 | 32/128/218/11/86/153 | |
| 0.5 | NAB5 | 42/108/178/21/74/100 | 17/30/46/13/22/33 |
| NAB10 | 55/128/213/20/74/100 | 20/40/62/12/31/47 | |
| NAB20 | 83/165/288/18/76/108 | 22/65/100/12/50/76 | |
| NAB40 | 150/247/430/22/80/115 | 26/112/185/11/95/152 | |
| NAB65 | 154/262/455/17/79/111 | 29/118/198/11/104/170 |
Installation & Safety Features
Mounting Instructions
- Shaft Mounting: Install conical shaft spanned tube with keyway alignment; use interlaced, equal-torque fastening (see recommended torque below).
| Model | Screw Size | Installation Torque (N·m) |
|---|---|---|
| NAB5 | M5 | 2.5 |
| NAB10 | M6 | 4.3 |
| NAB20 | M8 | 8.2 |
| NAB40 | M12 | 20 |
| NAB65 | M12 | 29 |
- Table Mounting: Fix flange with 4 bolts; control squareness between cover and shaft flange to <0.05mm.
Key Advantages
- Safety Design: Normally engaged (brakes on air loss) for emergency stop protection.
- Explosion Proof: Pneumatic actuation eliminates electrical sparks, suitable for hazardous environments.
- Easy Maintenance: Non-asbestos friction plates; split conical sleeve design allows replacement without removing the shaft.
- Environmental Rating: IP54 protection, operating temperature range: -10°C to +60°C.
