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What are the classification and precautions of impact drill bits

What are the classifications of impact bits

1. The metal drill bit is high-speed steel, which is black. It can drill holes in metal materials such as alloy steel, non-alloy steel, cast iron, etc. Please pay attention to not too high speed during operation, which will easily burn the edge of the drill bit.

2. Masonry drill bits are used for drilling holes in concrete materials and stone materials, and the cutter head is made of cemented carbide.

3. Woodworking drills are required to drill holes in wooden materials. Woodworking drills do not require high tool hardness, and the tool material is high-speed steel. Its practical drill bit for metal drilling can also drill wood. However, because wood is easy to generate heat and crumbs are not easy to come out, it is necessary to rotate slowly when drilling, and often to withdraw to remove crumbs.

4. If you need to drill holes on ceramic tiles or glass with high hardness, you should use a ceramic tile drill. The tool material is tungsten carbon alloy with high hardness. Pay attention to controlling the drilling speed when using it.

Precautions for the use of impact drills

1. Drills of different materials are used to drill different materials. The harder the tool, the worse the toughness, and the finer the drill, the worse the rigidity. Therefore, it is necessary to control the drilling speed, and it is best to add proper cooling oil or water when drilling. Nowadays, some drills are coated with a hard metal film. Steel, iron, and other materials that have not been heat treated can easily stick to the drill bit. Therefore, it is best to clean and lubricate the drill bit with soapy water before drilling.

2. Before using the drill, it is best to make a good sample of the material being drilled to prevent the drill from starting to run off the track, causing inconvenience.

3. Black drill bit iron is more suitable for all drill bits, and it is occasionally used in daily life. It is recommended to spare one at home.

Maintenance and maintenance of electric impact drill bits

1. After the drill is used, it should be checked immediately for damage, passivation and other bad conditions should be ground and trimmed immediately;

2. The drill bit should be seated when storing it, and it is convenient and time-saving when it is retrieved later, which saves the time to search for the drill bit;

3. When drilling a through hole, when the drill bit is about to drill through for a moment, the torque is the largest, so at this time, lighter pressure is required to advance slowly to avoid the drill bit from twisting due to excessive force;

4. The center point must be drilled before drilling, the purpose of which is to prevent the bit from slipping and deviating from the center, and to guide the bit in the correct position;

5. When drilling, make full use of cutting and pay attention to chip removal;

6. When drilling cross holes, drill large diameter holes first and then small diameter holes;

7. When the drill bit is broken or stopped abruptly when drilling, it may be caused by too fast cutting or rapid cold and hot;

8. Drilling causes the center of the drill bit to crack. It may be that the drill lip clearance angle is too small, the feed is too fast, the drill bit is dull, the pressure is too large, the lack of cooling, the drill bit or the workpiece is poorly clamped;

9. The drill bit breaks during drilling, which may be caused by too small drill lip clearance angle or too high drilling speed, large feed or the drill bit is dull and continues to press;

10. When the cutting edge breaks during drilling, it may be caused by hard spots in the material of the workpiece or too fast feed, improper selection of the drilling speed, and no simultaneous cutting during drilling;

11. The drilling hole is too large, which may be caused by the unequal half angle of the drill tip or the deviation of the static point, the deviation of the spindle, etc.;

12. Only one chip is discharged during drilling, which may be caused by the unequal length of the two cutting edges or the unequal half angle of the drill tip;

13. The squeaking sound when drilling may be caused by uneven drilling or dullness of the drill;

14. Abnormal changes in the properties of chips during drilling may be caused by dull or broken edges.