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Installed in The Spring Chuck of The Spindle：
When in use, the drill bit is installed in the spring chuck of the spindle. The clamping length of the twist drill on the spring chuck is 4-5 times the diameter of the drill shank to be clamped firmly.
Check The Concentricity of The Spindle and The Collet and The Clamping Force of The Collet:
1.Poor concentricity will cause small-diameter drills to break and inaccurate hole diameters.
2.Poor clamping force will cause the actual speed to be mismatched with the set speed, and slip between the chuck and the twist drill.
Check The Spindle Presser Foot:
The contact surface of the presser foot should be horizontal and vertical to the spindle without shaking to prevent broken drills and offset holes in the drilling.
Titanium Coated:
Smooth cutting surface
Advantages:
Improve the cutting accuracy, improve the wear resistance of the surface of the object, and prevent the surface of the object from oxidation and corrosion
Fully Ground:
Integral grinding and forming.
Advantages:
Smooth groove finish, high hardness, wear resistance.
High-speed Steel:
HSS 6542 steel
Advantages:
High hardness, high wear resistance and high heat resistance.
Twist drills can be clamped on Manual, Electric Drills, Drill Presses, and Lathes.
Suitable for Wood, Malleable Iron, Aluminum, Plastic etc.
Drilling holes must be kept clean, and coolant can be used for lubrication and cooling when drilling metal.
john h.
2025-06-25 16:45:35
worked as they should. Exact size I needed
James Matteo
2025-04-23 14:19:28
Complete garbage.
M.
2025-04-14 12:29:07
Nice drill bit
John Mancuso
2025-01-20 18:19:56
Drill fine as expected.
Blueflashone
2024-11-28 10:24:18
Arrived fast , as described, good quality product.
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