Chicago-Latrobe 69869 25PC Heavy-Duty Extra Long Drill Set 120X

Chicago-Latrobe 25-Piece Extra Long Drill Set

This Chicago-Latrobe 69869 set contains 25 heavy-duty extra long drill bits made from high speed steel with a black oxide finish. The fractional sizes range from 1/8 to 1/2 inch in 1/64 inch increments. It is intended for users who need extended reach when drilling deep holes in metal or wood.

K-Notched 118-degree point for general drilling

The bits feature a K-Notched point ground to 118 degrees, which is a standard geometry for general-purpose drilling in mild steel, aluminium and wood. The extra length allows access to deep cavities but increases deflection risk, so feed pressure must be controlled and chip clearing performed frequently. Hardened steels or stainless alloys may exceed the practical cutting ability of this high speed steel design.

Check chuck capacity and workpiece clearance

Before ordering, verify that your drill chuck can accommodate the largest 1/2 inch shank in the set. Ensure the workpiece and fixture allow enough axial space for the full extra long flute length without the chuck contacting the surface. Confirm that your machine provides sufficient torque at low speed for the larger diameters, and that coolant or lubricant can reach the cutting zone in deep holes.