Quick Reference Guide to Common Issues with Automotive Jack Support Blocks
Automotive jack support blocks are essential for safe vehicle lifting. Understanding common problems and their causes helps operators maintain safety and prolong service life.
1. Deformation or Crushing
Cause: Overloading beyond rated capacity, uneven load distribution, or using undersized blocks.
Effect: Reduced stability, tilting, and potential vehicle damage.
Solution: Use appropriately rated blocks and ensure correct placement under manufacturer-recommended lifting points.
2. Cracking or Surface Aging
Cause: Exposure to UV light, extreme temperatures, or chemical agents.
Effect: Loss of elasticity, reduced friction, and increased risk of slippage.
Solution: Store blocks in shaded, dry areas, clean after use, and replace aged blocks promptly.
3. Slipping or Poor Friction
Cause: Contamination by oil, grease, or dirt; improper alignment; worn surfaces.
Effect: Vehicle instability and risk of accidents during lifting.
Solution: Clean contact surfaces, ensure proper block alignment, and replace worn or smooth blocks.
4. Metal Component Corrosion
Cause: Moisture, chemical exposure, or lack of protective coating.
Effect: Weakening of structural components, possible block failure.
Solution: Inspect metal parts regularly, apply protective coatings, and store in dry environments.
5. Height or Size Mismatch
Cause: Using blocks incompatible with the vehicle’s lifting points.
Effect: Uneven lifting, vehicle tilting, or improper load distribution.
Solution: Select blocks that match vehicle specifications and lifting point geometry.
6. Sinking on Soft Surfaces
Cause: Operating on soft or uneven ground without load distribution.
Effect: Instability and tilting during lifting.
Solution: Use load-distribution plates and ensure firm, level ground.
7. Block Detachment or Adhesive Failure
Cause: Poor bonding of rubber pads to metal components or adhesive degradation.
Effect: Sudden slippage or loss of contact during lifting.
Solution: Inspect blocks for secure bonding and replace those with detachment risks.
Conclusion
Regular inspection, proper block selection, correct placement, and adherence to load limits are essential to avoid common issues with automotive jack support blocks. Proper care ensures operator safety and extends service life.
References
Gent, A. N. Engineering with Rubber: How to Design Rubber Components. Hanser Publishers, 2012.
ASTM D2000 – Standard Classification System for Rubber Products in Automotive and Industrial Applications.
Lake, G. J. “Fatigue and Fracture of Elastomers.” Rubber Chemistry and Technology, 2000.
ISO 2230 – Rubber Products—Guidelines for Storage and Maintenance.
ISO 7619-1 – Rubber, Vulcanized or Thermoplastic — Determination of Indentation Hardness.
