6PCS 22/30/35/45/50/65MM Carbide TCT Core Drill Bit Sets Metal Cutter Core Hole Saw Metalworking Tool

Note：
Please allow 1-3mm differs due to manual measurement. 
Due to the different display and different light, the picture may not reflect the actual color of the item. Thanks for your understanding.

Specifications:
Material: Carbide& Alloy Steel
Diameter: 22 - 65mm( 22mm 30mm 35mm 45mm 50mm 65mm)
Total length: about 68mm
Shank Diameter: about 9mm
Shank type:Triangle shank
Cooling type (internal / external cooling):external cooling

Handle diameter (mm) :10
Chip flute length (mm) :2
Useful length (mm): 25
Overall length (mm) :90
Vertex angle of outer blade (°) :45
Precautions
1. Check the integrity of the hole drill before use
2. When the hole drill is inserted into the electric drill, the three sides of the corresponding shank must be clamped.
3. Keep the verticality between the hole drill and the workpiece during the hole drilling operation
4. Start drilling with a smaller feed force. Use medium feed force after positioning
5. When drilling, the rotation speed should not be too low to prevent the knife from jamming and causing the knife to collapse.
6. When the center drill penetrates the workpiece, the force should not be too large to avoid the sharp collision between the blade and the workpiece
7. After the hole drill is drilled through the workpiece, the hole drill should be kept out of the workpiece while rotating.
8. For continuous drilling, the cutting edge should be cooled with cutting fluid

Features:
Made of high quality alloy steel, the blade is extremely sharped, and resistance to cutting. Have good perforation capability.


Effective length of 20mm, can process the thick steel plate, and the thick-walled metal pipe material perforation.


When cutting Chilled materials, cutting edges should be filling cooling liquid.


Can be clamped on hand drill and bench drill, can be used for thick steel plates, cast iron, stainless steel, non-standard angle iron and other metal open hole.