Various agricultural machines experience significant traction resistance when operating in the field. If not properly maintained, tractor hauling devices and fixing bolts can become damaged or even pulled off. Removing broken bolts from the machinery can be a challenging and time-consuming task. To address this issue, we have developed an effective method to extract broken bolts safely and efficiently.
First, clean the surface of the broken bolt thoroughly to remove any dirt, rust, or debris. Use a center punch to create a small indentation at the center of the bolt’s cross-section. Then, use a drill with a 6–8 mm bit to carefully drill a hole into the center of the bolt. Make sure the hole is deep enough to allow for further processing. After drilling, replace the small drill bit with a larger one (16 mm in diameter) and enlarge the hole to provide better access.
Next, select an electrode with a diameter smaller than 3.2 mm and perform surfacing welding inside the drilled hole. Start from the bottom and work your way up, gradually building a solid metal column along the length of the bolt. Begin the arc gently to avoid damaging the outer wall of the bolt. Once you reach the top, continue welding to form a cylindrical protrusion that is approximately 14–16 mm in diameter and 8–10 mm in height.
After the surfacing is complete, use a hand hammer to gently tap the end face of the welded section. This creates axial vibrations that help loosen the broken bolt from its threaded housing. The heat generated during the welding process, combined with subsequent cooling and vibration, will weaken the bond between the bolt and the surrounding threads.
Carefully observe the area after tapping. If you notice signs of rust or debris coming out of the break, it's a good indication that the bolt is beginning to loosen. At this point, place an M18 nut over the welded protrusion and weld it securely in place.
Once the welding has cooled slightly, use a pipe wrench to turn the nut back and forth. You can also gently tap the nut with a small hand hammer while twisting it to help dislodge the broken bolt. With consistent effort, the bolt should eventually come out without causing further damage.
Finally, once the broken bolt is removed, use a suitable thread chaser or tap to clean and restore the threads in the housing. This ensures that the hole is free of rust and other contaminants, allowing for proper reinstallation of new bolts in the future. This method not only saves time but also reduces the risk of damaging the surrounding structure.
Cushion cover supplier in china, we are the supplier of waterproof cushion cover, which can put waterproof robes in. Also we produce waterproof change robes, beach surf robes, long sleeve robe, kids black Change Robe, hi vis work wear, safety jacket and etc.
Product Name | Waterproof Surf Poncho long sleeve robe warm outdoor sport robes |
Size | One size or customized |
Color | Black, Grey, Blue, Red and etc and customized |
Fabric | Recycled nylon and polyester |
Sample | Available ( about 5-7 days) |
Logo | Customized logo accepted |
Cushion Cover,Couch Cushion Covers,Sofa Cushion Covers,Sofa Pillow Covers
Suzhou Golden Gamrnet MFG Co.,Ltd , https://www.svchangerobe.com