Dealing with the phenomenon of Tapping tap breakage

2025-09-01 11:32:52

When the exposed workpiece profile of the broken machine tapping tap is only 2-3mm, use a flat steel with a thickness of 2-3mm and a length of 150-200mm to drill a hole at 1/2 of its length (the diameter of the hole is the outer diameter of the Tapping tap), and then fit the flat steel onto the broken Tapping tap, leaving a gap of 0.5-1mm between the flat steel and the shaft end face.

Use electric welding to smoothly weld the broken Tapping tap and flat steel together. When welding, start from the center of the Tapping tap and gradually weld it together with the flat steel.

After the broken Tapping tap has naturally cooled down, inject engine oil into the chip groove of the broken Tapping tap, gently manipulate the flat steel, loosen the broken Tapping tap, and easily pull it out of the shaft. Hexagon nuts with an inner diameter slightly larger than the diameter of Squeezing tap bottom hole can also be used for welding.

When the broken Tapping tap is exposed for a long time, it can be unscrewed out with pliers. In the manufacturing industry, it is common to encounter tapping on the shaft end because most of these shaft parts have undergone quenching and tempering treatment, which has high toughness and strength, bringing a lot of difficulty to tapping and often causing the breakage of spiral flute. Many times, workpieces are scrapped due to improper handling.