Hex lag screw
wood screw
Hex head screw
Contact Us
Haiyan Tianqi Fastener Co., Ltd.
  • Add:Jiaxing Haiyan China NO.1-3 Jincheng South road, Qinshan Industrial Zone of Haiyan, Jiaxing
  • Tel:+86-573-86408971
  • Mobile Phone:+86-13606831322
  • Fax:+86-86408973
  • E-mail:472660558@qq.com
  • Post Code:314300
  • Skype:tianqi

How to take out the broken bolts of non-standard parts


How to take out the broken bolts of non-standard parts

1. First, remove the sludge on the surface of the broken screw, use the center to kill the center of the section, and then use an electric drill to install a 6-8 mm diameter drill, and drill the hole at the center of the section. Note that the hole must be drilled. through. After the hole is drilled, remove the small drill bit and replace it with a drill bit with a diameter of 16 mm, and continue to expand the hole of the broken bolt and drill it through.

2. Take a welding rod with a diameter of less than 3.2 mm, and use small and medium current to carry out surfacing welding from the inside to the outside of the hole of the broken bolt. The part where the surfacing starts can be half of the entire length of the bolt. When starting the surfacing welding, the arc ignition should not be too long to avoid burning through the outer wall of the broken bolt. After surfacing welding to the upper end surface of the broken bolt, continue to surfacing a cylinder with a diameter of 14-16 mm and a height of 8-10 mm.

3. After the surfacing is completed, hammer the end face with a hand hammer to make the broken bolt vibrate along its axial direction. Due to the heat generated by the arc before and the subsequent cooling, coupled with the vibration at this time, there will be looseness between the broken bolt and the thread of the body.

4. Carefully observe, when a trace of rust leaks from the fracture after knocking, you can take the nut sleeve, place it on the surfacing stigma and weld the two together.

5. After welding, use a Torx wrench sleeve while it is still hot, and twist the nut back and forth. You can also tap the end face of the nut with a small hammer while twisting it back and forth, so that the broken bolt can be taken out.

6. After taking out the broken bolts, use a suitable wire hammer to process the threaded buttons in the frame to remove the rust and other debris in the holes.

Whether it is the tiny screws of electronic equipment, the general screws of furniture and electrical appliances, and even the large screws used in engineering, construction, bridges, transportation equipment, airplanes, trams, automobiles, etc., screws occupy a very important position in these fields. .

Haiyan Tianqi Fastener Co., Ltd is Phillips Wood Screws suppliers:http://www.din571.com/

Home   |    About us   |    Products   |    News   |    Technical support   |    Certificates   |    Contact us    |    Hexagon Washer Head Wood Screws