![]() ![]() So this 3/8" thick, 1 inch wide copper bar is overkill, which means its just about right. I am making my Own Bussbar, for 2/0 cable, which will rarely see a maximum sustained current of 240 amps. With No experience using thread forming taps, I am wondering if they pull themselves into the predrilled hole, or if they have to be lowered/ forced into the predrilled hole with precision I can never achieve by hand. Researching this, I ran across the recommendation to use thread forming taps rather than thread cutting taps. I've drilled and tapped copper before without a drill press, for 6mm metric thread ( nippondenso alternator + output stud), but was less than impressed with the results. The face is angled incorrectly (usually too small).I'm Looking to make 3/8-16 threads in a 3/8" thick chunk of copper, for some brass bolts to make my own upgrade proof busbar.Using tap stands with adjustable lengths are ideal.Fixture positioning or fixturing incorrectly.Based on the corresponding standard, choose the diameter of the bottom hole.Select the correct tap based on the processing conditions. ![]() Oversize internal diameter of the bottom hole.It is difficult to remove chips smoothly.Insufficient length of the cutting cone.The Surface Roughness of the Internal Thread Is Too High.Reduce thread depth or increase drill depth.Tap holders with torque settings should be used.The bottom of the hole is hit with a tap.Lubrication that is incorrect or inadequate.Use emulsions or oils that are appropriate.No lubricant or insufficient lubrication.A thread overfed on a faulty tool holder.Reduce the cutting speed and check drilling recommendations.Choose an emulsion or oil that is appropriate.Application of wear-resistant surface treatments is recommended.Tape that is not suitable for the application.By applying them during tapping, you minimize the occurrence of issues. The following analyzes likely causes and remedies when tapping threads in metal. Problems and Solutions Related to Tapping If these concerns are not addressed, thread taps may have various problems, including chipping of teeth, breaking, excessive wear, large or undersized pitch diameters, and rough surfaces. What is the threaded hole size and type?.The workpiece to be processed consists of what kind of material? Is it steel, cast iron, or hardened steel?.What type of screw hole is processed? A through-hole or blind hole?.Are the screw holes deep, or is the workpiece thick?.How hard is the metal workpiece material?.For a successful tapping process, it is important to consider the following issues: Factors To Consider Before Tappingĭue to lack of sensory connection during tapping operation, particularly when using CNC machines, it may be challenging to detect malfunctions until it is too late to be corrected. If several scrapped parts have an error, it could waste a great deal of time. Tapping operations are one of the last steps before completion, and they are the most prone to errors since they require careful planning, balance, and research. Taps are cylindrical or conical thread-cutting tools with threads of the desired form around their circumference - the tap cuts or forms internal threads by combining rotary motion and axial motion. Tapping is a machining technique that creates threads on internal surfaces. “If you try, you are already ahead of those who don't.” - Unknown Tapping Troubleshooting ![]()
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