How to drill holes with a longer drill bit
How to drill holes with a longer drill bit
- Preparation work before drilling
- Select the appropriate extension drill bit. The length of the extension drill bit should be selected according to the depth of drilling required, and should not exceed the clamping length of the processing machine tool.
- Clean the extension bit. For newly purchased extended drill bits and extended drill bits that have been stored for a long time, they should be wiped clean with oil cloth or alcohol first, and check whether the end face of the drill bit is clear. If the tip is found to be damaged, it should be replaced in time.
- Add appropriate amount of lubricating oil. When using an extended drill bit, lubricating oil must be added to reduce the heat accumulation of torsional force and ensure smooth drilling feed.
- Usage skills
- Adjust the feed speed appropriately. The processing speed of the extended drill bit must be selected according to the extended length and material properties, and the optimal working feed speed is generally 1-2 times slower than the conventional drilling speed.
- Control feed pressure. During the drilling process, the feed pressure of the extended drill bit must be properly controlled. Excessive feed pressure may easily cause the drill bit to bend or break.
- Clean the extension drill bit regularly. When drilling, the drill bit must be taken out regularly for cleaning and lubricating oil to ensure the normal service life of the drill bit.
- Precautions
- The drilling depth should not be too large. Generally, the depth should not exceed 3 times of the extended drill bit.
- The extended drill bit has a short service life and needs to be replaced in time.
- Do not apply excessive force and excessive lubricant when drilling to avoid losing control of the extended drill bit.
- It is recommended to install an auxiliary clamp when drilling to prevent the extended drill bit from deflecting due to insufficient clamping.
In short, when drilling an extension drill bit, you must fully consider the usage method and precautions, and adjust and master it according to the actual situation to ensure that the extension drill bit drills correctly.
