Selection Guide for Pads in Vertical Jacks
Pads in vertical jacks are critical components that ensure load distribution, stability, and safety during lifting operations. Selecting the correct pad type, material, and size is essential for optimal performance and longevity.
1. Load Capacity Considerations
Rated Load Matching: Choose pads that are rated to handle the maximum load of the jack. Overloading can cause permanent deformation or sudden failure.
Load Distribution Area: Larger pads spread the load over a wider surface, reducing ground pressure and risk of sinking on soft surfaces.
2. Material Selection
Polyurethane Pads: Offer high strength, wear resistance, and elasticity; suitable for most indoor and outdoor lifting applications.
Rubber Pads: Provide excellent grip and vibration absorption, ideal for uneven or slippery surfaces.
Oil-Resistant Options: Necessary in environments where pads may contact oils, fuels, or other chemicals.
Temperature-Resistant Grades: For extreme hot or cold conditions, select pads that maintain mechanical properties under temperature fluctuations.
3. Pad Size and Shape
Surface Area: Select pads with a sufficient surface area to distribute load evenly.
Thickness: Thicker pads can better absorb shocks and prevent tilting, but must be compatible with jack design.
Profile Design: Pads with anti-slip surfaces or textured profiles enhance stability, especially on smooth or inclined surfaces.
4. Environmental and Operational Factors
Ground Conditions: On soft or uneven ground, use larger or reinforced pads, or add support plates to prevent sinking.
Exposure to Chemicals: Avoid contact with oils, solvents, or harsh chemicals unless using resistant materials.
Maintenance Access: Select pads that are easy to inspect, clean, and replace.
5. Safety and Compliance
Ensure pads comply with relevant standards for mechanical strength, hardness, and wear resistance.
Regularly inspect pads for cracks, deformation, or adhesion issues and replace them as needed.
Follow manufacturer recommendations for load limits, environmental use, and maintenance schedules.
6. Conclusion
Selecting the right pad for vertical jacks involves matching load capacity, material properties, size, and operational conditions. Proper pad selection improves stability, prevents premature failure, and enhances safety during lifting operations.
References
Gent, A. N. Engineering with Rubber: How to Design Rubber Components. Hanser Publishers, 2012.
Lake, G. J. “Fatigue and Fracture of Elastomers.” Rubber Chemistry and Technology, 2000.
ASTM D2240 – Standard Test Method for Rubber Property—Durometer Hardness.
ISO 2230 – Rubber Products—Guidelines for Storage and Maintenance.
ASTM D2000 – Standard Classification System for Rubber Products in Automotive and Industrial Applications.
