Chicago-Latrobe 44430 15/32 in 118° Left-Hand Helix Jobber Drill Bit

Chicago-Latrobe 44430 Left-Hand Jobber Drill

This Chicago-Latrobe 44430 drill bit is a jobber-length tool designed for creating holes in metal and other materials. Its left-hand helix direction allows it to operate in reverse rotation, which is useful for extracting broken fasteners or working with specific machinery setups. The bright, uncoated high-speed steel construction provides a standard cutting surface for general-purpose drilling tasks.

118-Degree Conventional Point Limits

The 118-degree conventional point angle is suited for general drilling across a range of materials but requires proper centring to prevent walking on hard or smooth surfaces. As a non-coolant-through bit with zero coolant holes, it relies on external lubrication or peck drilling cycles to manage heat and evacuate chips effectively during deeper cuts. The jobber length offers standard reach and rigidity for typical workshop applications.

15/32 Inch Diameter Fit

The critical specification is the 15/32 inch diameter, which corresponds to a decimal equivalent of .4688 inches. This exact fractional size determines compatibility with specific tap drill charts, clearance hole requirements, or fastener specifications. Buyers needing a different diameter, a coated surface for extended wear, or a split-point geometry for self-centring must select an alternative bit.