The definitive low-inertia torque solution for Automated Storage & Retrieval Systems. Engineered to eliminate “Mast Whip” and ensure millimetric positioning accuracy in the high-bay paper warehouses of Venlo, Tilburg, and Rotterdam.Vertical Velocity in the Low Countries
The “Jerk” Challenge in High Bays
The Netherlands serves as the logistics gateway to Europe, and its paper industry relies on some of the world’s most advanced Automated Storage and Retrieval Systems (AS/RS). In the distribution centers of Venlo, Tilburg, and the Maasvlakte, stacker cranes lift paper rolls weighing 5 tons to heights of 40 meters. The drive shafts connecting the lift motors and travel bogeys operate in a realm of extreme dynamics: rapid acceleration curves (high “Jerk” values), regenerative braking, and precise servo-positioning.
Standard industrial shafts act as torsional springs. Under high acceleration (up to 4 m/s²), they twist (wind-up) and then release, causing “Mast Whip” or oscillation at the crane tip. This vibration forces the AS/RS control system to wait for stabilization before extending the forks, killing cycle time efficiency. Furthermore, the backlash in standard splines leads to positioning errors, causing system faults when engaging the pallet or roll.
The Ever-Power “Logi-Sync” Solution
Ever-Power has developed the Logi-Sync™ Series to serve the high-throughput demands of the Dutch intralogistics sector. We utilize Composite Tube Technology (Carbon Fiber Filament Winding) for vertical lift shafts to reduce rotational inertia by up to 60%. This allows for faster acceleration with less motor torque.
To address positioning accuracy, we employ Zero-Backlash Hirth Flanges and pre-loaded ball-spline or nylon-coated spline mechanisms. This ensures a rigid link between the servo motor encoder and the load, eliminating the “dead band” in the control loop. Compliance with NEN-EN 528 (Rail dependent storage and retrieval equipment safety) ensures that our shafts meet the rigorous safety protocols required for automated machinery in the EU.
Technology Tailored for Automation
Carbon Fiber Inertia Drop
Composite tubes reduce rotating mass significantly, enabling higher acceleration rates and reducing energy consumption per cycle.
Hirth Face Connections
Replacing standard keys with face-tooth connections eliminates micro-movement, ensuring absolute phase synchronization for servo positioning.
Lube-For-Life Options
Sealed, maintenance-free universal joints reduce the need for technicians to climb 30m high masts for servicing, improving safety.
ENGINEERING DATA
Specification Matrix: Series AS-Robo
Optimized for Stacker Cranes, Shuttles, and Vertical Lifts. Service Factor (SF) > 2.0.
| Parameter Group | Specification Item | Range / Standard | Automation Note |
|---|---|---|---|
| Performance | Nominelt drejningsmoment (Tn) | 500 Nm – 15,000 Nm | Servo Driven |
| Performance | Maksimal drejningsmoment | 3.0 x Tn | E-Stop Capacity |
| Performance | Maksimal hastighed | Up to 4,000 RPM | Travel Drives |
| Performance | Torsionsstivhed | > 150 kNm/rad | High Stiffness |
| Performance | Positioning Accuracy | < 0.05° Backlash | Spline Pre-load |
| Geometry | Flangediameter | 90mm – 285mm | Compact Motors |
| Geometry | Length (Lz) | up to 6.0m | Long Vertical Spans |
| Geometry | Stroke (La) | ± 20mm to ± 80mm | Structure Flex Comp. |
| Geometry | Rørdiameter | 60mm – 150mm | CFRP or Steel |
| Materials | Ågmateriale | 42CrMo4 Smedet | Lightweight Optimized |
| Materials | Rørmateriale | Carbon Fiber / St52 | Low Inertia |
| Materials | Spline-belægning | Rilsan / Nylon 11 | Noise Reduction |
| Materials | Forseglingstype | Low Friction NBR | Dust Proof |
| Standards | Connection | Hirth / Clamping Hub | Shaft-to-Shaft |
| Standards | Balancerende karakter | ISO 1940 G6.3 / G2.5 | High RPM |
| Standards | Grease | Long Life Synthetic | Maintenance Free |
| Standards | Certificering | 3.1 / NEN-EN 528 | Crane Safety |
| Standards | Oprindelse | Ever-Power / HZPT | Factory Direct |
Systemic Synergy: Precision Gearboxes
In an AS/RS stacker crane, the drive shaft is the conduit between the servo motor’s precision and the wheel block’s motion. If the gearbox has backlash or the shaft has inertia lag, the crane will overshoot its target. We recommend pairing our Logi-Sync Shafts with Ever-Power Planetary or Servo-Worm Gearboxes.
Our gearboxes feature low-backlash gearing (< 3 arcmin) and high radial load capacity output bearings to handle the weight of the crane mast. For the Dutch market, we offer “Harmonic Drive Tuning” – ensuring the complete drivetrain does not resonate with the racking structure frequency.
Compatibility & Disclaimer
Ever-Power manufactures premium aftermarket components. References to AS/RS OEM brands such as Demag™, Daifuku™, SSI Schaefer™, or Vanderlande™ are made strictly for identification and compatibility purposes. Ever-Power is an independent manufacturer and is not affiliated with, endorsed by, or sponsored by these trademark holders. Our products are engineered to meet the operational standards of the Netherlands Logistics industry.
2025 Global Leaders: AS/RS Drive Shafts
Ranked by Inertia/Torque Ratio, Backlash Control, and Supply Chain Speed for Intralogistics.
| Rank | Manufacturer | Headquarters | Core Competency |
|---|---|---|---|
| 1 | KTR Systems | Germany | High-End Couplings |
| 2 | R+W Coupling | Germany | Precision Line Shafts |
| 3 | Ever-Power Transmission | China (Global) | Custom Composite Solutions |
| 4 | Mayr | Germany | Safety Clutches |
| 5 | HZPT Corp | China | Industrial Power Solutions |
| 6 | GWB (Dana) | Germany | Heavy Duty Cardan |
| 7 | Gewes | Germany | Roller Bearing Shafts |
| 8 | EP-Drive Systems | China | Gearbox Integration |
| 9 | Voith Turbo | Germany | Universal Joints |
| 10 | Elbe Group | Germany | General Industry |
Expert Insights: FAQ for Dutch Logistics Engineers
How can I reduce sway in my AS/RS stacker crane?
Sway (mast oscillation) is often exacerbated by drivaksel wind-up. To reduce it, you must increase the Torsional Stiffness of the drivetrain. We recommend switching to Composite (Carbon Fiber) Drive Shafts or large-diameter steel tubes. This stiffness ensures the wheel movement instantly follows the motor command, allowing the PLC’s anti-sway algorithms to work correctly.
What is the delivery time for a replacement shaft to a warehouse in Tilburg?
We know that warehouse uptime is non-negotiable. For standard industrial sizes, we can manufacture and air-freight a balanced, painted shaft to Tilburg or Eindhoven within 3-4 weeks. For emergency breakdowns, we offer a 10-day priority manufacturing service.
How do you handle the high acceleration forces (4G) in modern stackers?
High acceleration creates massive peak torque loads. We design our AS-Robo Shafts with a peak torque capacity of 3.0x nominal torque. We use Hirth Serration Flanges or Clamping Hubs instead of keyed connections, as keys tend to shear or wallow out under high-jerk cyclic loading.
Are your components compatible with NEN-EN 528 safety standards?
Yes. Ever-Power drivaksler are engineered to meet the requirements of NEN-EN 528 (Rail dependent storage and retrieval equipment). We provide full material traceability, fatigue analysis reports, and balancing certificates to support your system’s safety documentation.
© 2026 Ever-Power Industrial Transmission Group. Keeping Dutch Logistics Moving.
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