HSS-6542 machine tap, made of M2 material, contains tungsten 6, suitable for stainless steel and mold steel, and is sharp and durable.The above products are priced at a single branch.

 Methods and precautions for tapping threads with tap machines

Because the hand tapping thread has low efficiency and unstable quality, in actual mass production, the main use of good quality and high efficiency machine tapping threads is used.However, during the process of tapping the thread, we must also use the machines and tools correctly, otherwise it will also affect the processing quality of the threaded hole.

 The thread operation method should be light and slow when the tap is about to finish tapping the thread to prevent interference and impact of the tap from the depth of the thread bottom hole of the workpiece. When tapping blind hole threads or screw holes with a large depth, tap should be used.Thread safety chuck to withstand cutting forces.The cutting force under the safety chuck must be adjusted according to the size of the tap to avoid breaking the tap or not being able to enter. The tapping stroke of the tap cutting part length should be rotated on the drilling machine inlet handle to assist the tap into the bottom hole.This can avoid scraping the thread when pulling the spindle down by several incomplete threads. When the calibration part enters the workpiece, the thread can be naturally rotated and cut to avoid cutting the tooth shape.When tapping through the threads, you should pay attention to the calibration part of the tap not being exposed to the head, otherwise it will cause random buckle when reversed and exited the tap.
   Selection of cutting speed The cutting speed of tapping thread is mainly determined based on the cutting material, tap diameter, pitch, and depth of thread hole.Generally, when the threaded hole depth is within 10-30mm, the workpiece is the following material, its cutting speed is roughly as follows: steel v=6-15m/min tempered steel or harder steel v=5-10m/min stainless steel v=2-7m/min cast iron v=8-10m/min Under the same conditions, the tap diameter is smaller, the tap diameter is larger, the relative low speed pitch is larger, the low speed is larger.
 When selecting cutting fluid, the cutting fluid is mainly selected based on the material to be processed and sufficient cutting fluid must be maintained. For metal materials, emulsified oil or vulcanized cutting oil can be used.If the surface roughness of the threaded holes on the workpiece is low, the effect of using rapeseed oil and molybdenum disulfide is better.