3 Custom Electric Air Shaft Roll Lifters Shipped to South Korea
A 200 kg roll-handling project combining an internal-core air shaft, electric lifting, side-shift alignment and 360-degree rotation.
Quick Answer
A South Korean customer required three custom material-handling units for lifting, positioning and rotating rolls through their internal cores. A standard stacker could not provide the required core engagement, lateral alignment or controlled rotation. SINOLIFT therefore configured an air shaft roll lifter with manual travel, electric lifting, a Ø73 mm pneumatic expanding shaft, 350 mm shaft length, ±100 mm side shift and 360-degree rotation. The design capacity was 200 kg, with the shaft center lifting to approximately 1,300 mm. After assembly and functional verification, all three customized units were prepared and shipped to South Korea.
Key Takeaways
- The project required core-based handling of rolls weighing up to 200 kg.
- The Ø73 × 350 mm air shaft was selected to engage the roll through its internal core.
- Electric lifting was combined with manual travel, side shifting and 360-degree roll rotation.
- The side-shift mechanism provided 100 mm of adjustment in each direction for more accurate alignment.
- Three customized units were completed and shipped; certified proof-load and customer-site test data were not provided for this case study.
Project Background and Challenges
The project involved three custom roll-handling trucks for a customer in South Korea. The customer’s identity, industry and processed roll material remain confidential, so this case focuses on the disclosed equipment configuration and engineering requirements.
The application required operators to insert a shaft into the center of a roll, secure it internally, lift it, align it with another position and rotate it when necessary. This type of handling sequence is common in operations involving film, paper, foil, nonwoven material, labels and other products supplied in roll form. However, the exact roll material and downstream machine used in this project were not disclosed.
A conventional fork stacker was unsuitable because it supports a load from underneath. In this application, the load had to be picked up through its core. Supporting the roll externally could also obstruct loading into processing equipment or create unwanted contact with the roll surface.
A basic fixed-shaft roll lifter would have introduced another limitation. Even when the truck was positioned close to the machine, small lateral alignment errors could make it difficult to insert the shaft accurately into a roll core or place the roll onto a machine interface. Repeatedly repositioning the entire truck would increase handling time and become difficult in a confined work area.
The requested functions therefore indicate five practical challenges:
- Securely gripping a roll from inside its core;
- Handling a rated roll weight of up to 200 kg;
- Raising the roll center to approximately 1,300 mm;
- Correcting lateral misalignment without moving the complete truck;
- Rotating the roll while it remained supported.
These requirements could not be met efficiently by a standard pallet stacker or a fixed mandrel lifting truck.
Custom Engineering Solution
Working Conditions and Design Inputs
The solution was developed around the disclosed load, core and positioning requirements. According to the project drawing and product information, the principal design inputs were:
The assembly drawing also indicates an approximate overall height of 1,800 mm, an overall length of 1,213.1 mm and plan-view dimensions of 420 mm inner spacing and 620 mm overall width.
The drawing’s title block lists an assembly weight of 467.29 kg. This should be treated as the drawing assembly weight rather than a confirmed packed shipping weight, which may vary according to the battery, accessories and export packaging.
Although the project name uses “electric air shaft roll lifter,” the actual configuration is more precisely described as a semi-electric roll lifter: lifting is powered, while horizontal movement is manual. This distinction matters when buyers compare it with fully powered roll-handling equipment.
Pneumatic Expanding Shaft
The central feature is the pneumatic expanding shaft, commonly called an air shaft. After the Ø73 mm shaft is inserted into a compatible roll core, compressed air expands its gripping elements. This increases contact and friction between the shaft and the inner surface of the core.
Internal gripping leaves most of the roll surface unobstructed. Deflating the shaft then reduces the grip so that the operator can withdraw it after the roll has been placed.
The specified Ø73 mm diameter and 350 mm working length are application-specific values. They should not be treated as universally suitable for every roll. Core inside diameter, core material, engagement depth, roll width and load distribution must all be confirmed before manufacturing another unit.
Electric Lifting and Side-Shift Adjustment
The electric lifting system reduces the manual effort required to raise a 200 kg roll. The disclosed drawing places the maximum shaft center at approximately 1,300 mm, allowing the truck to serve machines or storage positions within that interface range.
The side-shift mechanism allows the shaft assembly to move 100 mm in either direction. Instead of repeatedly pulling, steering and repositioning the entire truck, the operator can make a controlled lateral correction after approaching the roll or machine. Side shift does not replace correct truck positioning; it provides fine adjustment within a total lateral range of approximately 200 mm.
360-Degree Rotation
The shaft assembly can rotate through 360 degrees, enabling the operator to change the roll orientation while the roll remains supported. This can be valuable when a roll must be transferred from one orientation to another or aligned with a production-machine interface.
The disclosed documents do not identify whether rotation is powered or manual, nor do they provide a specified rotation speed. Buyers should confirm those points during quotation when controlled powered rotation is required.
Structure, Materials and Manufacturing
The drawing identifies the product as a welded semi-electric expanding-shaft truck and includes general dimensional tolerances for machined and welded structures. It shows a fabricated chassis, mast, wheel arrangement, lifting carriage, side-shift assembly and cantilevered air shaft.
The exact steel grades, shaft material, bearing specifications, weld procedures, surface treatment and battery specification were not included in the supplied information. It would therefore be inaccurate to assign specific materials or manufacturing standards to this project.
For this type of custom equipment, quality control should normally focus on dimensional accuracy, alignment, weld consistency, side-shift travel, smooth lifting, inflation-pressure retention, stability and service access.
Design Risks and Engineering Responses
Cantilever loading was a central design consideration because the roll is supported on a shaft projecting from the lifting structure. Roll weight alone is not sufficient for design review; the load center and engagement position also affect bending force and truck stability.
Core compatibility was another critical risk. A shaft that is too small may not develop reliable contact, while an oversized or unsuitable expanding element may damage the core. The Ø73 mm shaft was therefore a project-specific interface rather than a generic attachment.
Lateral movement and rotation introduce potential pinch points. The available documents do not disclose guards, interlocks or a formal risk-assessment record. Buyers should review operating controls, emergency stopping, parking stability and operator-clearance requirements according to their site rules before commissioning.
Standard vs. Custom Solution
| Evaluation Area | Standard Lifting Truck | Custom Air Shaft Roll Lifter |
|---|---|---|
| Roll interface | Fork or platform support | Internal-core pneumatic grip |
| Alignment | Requires repositioning of the truck | ±100 mm side-shift adjustment |
| Roll rotation | Usually unavailable | 360-degree rotation |
| Application fit | Suitable for general palletized loads | Configured for a specific core and roll |
| Surface contact | May contact the roll exterior | Primarily engages the internal core |
| Maintenance | Standardized replacement parts | Requires support for custom shaft and side-shift components |
| Lead time | Usually shorter | Includes engineering, drawing confirmation and manufacturing |
| Initial cost | Generally lower | Influenced by customization and verification requirements |
| Service life | Depends on correct general use | Depends on correct core fit, load center and maintenance |
| Procurement risk | Lower configuration complexity | Requires accurate application data before production |
Manufacturing, Testing and Results
The manufacturing sequence for the disclosed design included fabrication of the wheeled chassis and mast structure, assembly of the lifting carriage, installation of the side-shift mechanism and integration of the air shaft.
The available project information supports four separate levels of evidence:
The confirmed project outcome is that three customized units were completed and shipped to South Korea. Customer-site productivity gains, operating-cycle reductions and long-term performance have not been disclosed.
Selection and Procurement Advice
- Provide complete roll data. State the maximum weight, outside diameter, width, core inside diameter, core length and core material.
- Define the load center. A 200 kg short roll and a 200 kg wide roll can impose different bending moments on a cantilevered shaft.
- Confirm all machine interfaces. Provide the required pickup height, discharge height, insertion depth, approach clearance and available aisle width.
- Specify motion requirements. Clarify whether travel, lifting, side shifting and rotation should be manual or powered.
- Agree on verification criteria. Define the functional load, test duration, acceptable deflection, pressure retention and acceptance documentation before production.
- Evaluate engineering capability. Ask the supplier to confirm core compatibility, stability, structural calculations, drawing approval and spare-part support.
Frequently Asked Questions
When is a custom air shaft roll lifter necessary?
Customization is appropriate when a standard fork truck cannot engage the load safely or cannot match the roll core, load center, machine height or required orientation. It is also justified when side shift, controlled rotation or restricted overall dimensions are required.
What information is required for a quotation?
Provide the roll weight, outside diameter, width, core inside diameter, core material and required engagement length. The supplier also needs pickup and discharge heights, machine drawings, aisle conditions, floor condition, required motions and preferred power source.
How should materials be selected?
Material selection should reflect the rated load, load center, duty cycle, operating environment and core-contact requirements. Structural material, shaft material, bearings, expanding elements and surface treatment should be evaluated separately. Corrosive, cleanroom or food-related environments may require additional material controls.
How can a custom roll lifter be validated?
Validation should begin with approved drawings and interface dimensions. Factory checks should then cover unloaded motion, rated functional loading, stability, parking performance, side-shift travel, rotation, pressure retention and emergency controls. Site acceptance should confirm compatibility with the actual roll and production machine.
What affects price and lead time?
The main factors are lifting capacity, shaft geometry, side-shift travel, rotation method, lift height, power configuration, battery specification, structural complexity and documentation requirements. Special materials, proof-load testing, additional guarding and nonstandard electrical components can also affect cost and delivery.
Conclusion
This South Korean project shows why roll handling must be designed around the complete interface rather than load capacity alone. The three custom electric air shaft roll lifters combined a 200 kg design capacity with a Ø73 × 350 mm expanding shaft, electric lifting, ±100 mm lateral adjustment and 360-degree rotation. Together, these functions addressed internal-core gripping, lifting-height requirements and final machine alignment that a standard stacker could not provide.
A suitable configuration still depends on the actual roll core, load center, machine height, aisle space and operating method. To evaluate a similar application, send SINOLIFT your roll dimensions, maximum weight, core specifications, pickup and discharge heights, site photos and machine-interface drawing.
Discuss Your Roll-Handling Application with SINOLIFT
Submit your operating conditions, roll data or technical drawing for a feasibility review and customized equipment recommendation.
Click the email address or phone number to copy it. Please include the maximum roll weight, roll width, outside diameter, core inside diameter, required lifting height and machine-interface information.
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