When shopping for an electric strapping machine, you’ll see “max tension” numbers everywhere — 2000N, 2800N, 3500N. But what does that number actually mean for your daily packaging operation? In this post, we break down what 3500N of tension really delivers, and why it matters for your loads.
What Does “3500N” Actually Mean?
“N” stands for Newtons — the standard unit of force. 3500N converts to approximately:
- 786 pounds-force (lbf) in imperial units
- 357 kgf in kilogram-force
That means the VON1 can pull up to 357 kg of tension on a single strap — enough to compress and secure even densely packed, heavy industrial pallets.
Why Tension Matters
Strap tension isn’t just about “pulling tight.” Proper tension serves three critical functions:
- Load consolidation: Tension pulls all boxes/crates on a pallet into a single rigid unit, preventing internal shifting.
- Strap retention: Properly tensioned strap “bites” into cardboard surfaces, creating friction that prevents slippage.
- Shock absorption: A well-tensioned load can survive forklift impacts, potholes, and container stacking during ocean freight.
Too little tension = load shift. Too much tension = crushed boxes. The VON1’s adjustable tension dial lets you find the sweet spot for every load type.
How the VON1 Delivers Consistent 3500N
Many electric strapping tools claim high tension but deliver inconsistent results due to motor wear, battery sag, or poor gear design. The VON1 maintains its rated performance through:
1. Brushless Motor Technology
Brushless motors deliver higher torque at lower power consumption, with no commutator wear. The VON1’s motor maintains full tension even as battery charge drops to 20%.
2.planetary Gear Reduction
A precision planetary gearbox multiplies motor torque while maintaining smooth, controlled tension delivery — no jerky starts that can snap the strap.
3. Smart Tension Control
The LED display shows real-time tension as it’s being applied. When the preset tension is reached, the motor stops automatically — no overshoot, no undertension.
Real-World Applications by Tension Level
| Load Type | Recommended Tension | Why |
|---|---|---|
| Lightweight cardboard boxes | 800–1500N | Prevent crushing while securing load |
| Mixed consumer goods | 1500–2500N | Balance security and package protection |
| Heavy industrial parts | 2500–3500N | Maximum consolidation for dense loads |
| Metal/stone/construction materials | 3000–3500N | Prevent any load shift under vibration |
The Friction Weld Advantage at High Tension
High tension is useless if the seal fails. Traditional metal seals are the weak link — they can bend, slip, or shear under high load.
The VON1 uses friction welding to fuse the strap ends directly together. The weld joint is as strong as the strap itself — so when you tension to 3500N, the seal holds at 3500N. No metal parts to fail.
Testing Your Own Load Requirements
Not sure what tension your loads need? Try this simple test:
- Strap a test pallet at minimum tension
- Shake the pallet (or simulate transit by pushing it against a wall)
- If the load shifts → increase tension by 500N
- Repeat until the load is fully rigid
- Record that tension setting on the VON1 LED display for future loads of the same type