Hunter Lift Ltd. specializes in the design, engineering, and manufacture of lifting devices, primarily for all industries. We design and engineer full below-the-hook lifting systems, including automatic, hydraulic, pneumatic and motorized lifting equipment, J-hooks, spreader beams, C-hooks, and mobile lifters.
Explore all Overhead Crane AttachmentsRepair of Straddle Carrier for the Heavy Steel Industry
A steel manufacturer was experiencing problems with the gripping levers on their straddle carrier trucks. The levers had several cracks and in some cases failures. Along with input from the customer, Hunter Lift engineers used their expertise to assess and rectify the issues. Components of the gripping levers were evaluated for stress concentrations and possible fatigue failures. The broken ears were replaced with new ears, utilizing larger bosses and full penetration welds. Some of the high stressed plates were replaced with heavier plates and additional gussets. The main pivot pin housing was replaced with heavy wall alloy tubing to prevent welds from cracking. Upon completion, the straddle carrier was analyzed by an NDT technician to verify weld integrity. The redesigned lever has resulted in a lower repair cost and less downtime for maintenance.
Straddle Carrier
Our client was experiencing failures with the gripping levers of their straddle carriers. The levers were sent to Hunter Lift for evaluation and subsequent modification
Repair
- The Broken Ears Were Replaced
- Utilizing Larger Bosses and Full Penetration Welds
- High Stressed Plates Were Replaced with Heavier Plates with backup Gussets
- Main Tube Pin Housing was Replaced with Heavy Wall Alloy Tubing
- Prevents Welds from Cracking
Engineering
- Components of Levers Evaluated for Stress Concentrations and Possible Fatigue Failures
Analysis
- Fatigue Analysis
- Dynamic Analysis
- Stress Analysis
Weight Capacity
- 150 Tongs
Industry for Use
- Heavy Steel
Delivery Time
- 12 Weeks
Standards Met
- ASME B30.20
- BTH-1
- AWS D14.1