Cle-line C18112 Jobber Drill Bit Wire Size 59 Hss

Product Description

The CLE-LINE C18112 is a wire gauge jobber drill bit sized at No. 59 (0.0410 inches decimal equivalent) designed for precision drilling in ferrous materials. Built from high speed steel (HSS) with a black and gold oxide coating, this bit runs a 135-degree split point that reduces walking and cutting force at the start of each hole. The overall length is 1.625 inches with a flute length of 0.6875 inches. Right-hand spiral fluting and a straight cylindrical shank make it compatible with standard drill chucks. The heavy-duty grade construction supports demanding production and maintenance drilling tasks.

This drill bit is suited for technicians and machinists drilling into steel and cast iron in light manufacturing, mechanical service, HVAC, electrical, and general trade applications. The small wire gauge diameter makes it a common choice for pilot holes, tap drilling, and precision clearance holes where tight tolerances matter. The split point geometry is particularly useful when drilling without a center punch, reducing the need for a separate spotting operation. It is sold individually and fits standard keyless or keyed drill chucks used in handheld and bench-mounted drilling equipment.

Key Features

• Wire gauge No. 59 diameter - 0.0410 inches decimal equivalent for precision small-hole work
• 135-degree split point reduces drill walking and lowers required feed force
• High speed steel construction handles steel and cast iron applications
• Black and gold oxide coating provides lubricity and surface protection
• Right-hand regular spiral flute efficiently clears chips from the bore
• Tapered web and straight shank design for use in standard drill chucks

Compatibility

Designed as an OEM-style replacement or direct-use jobber drill bit for applications requiring a wire gauge No. 59 straight-shank drill in standard drill chucks and handheld or bench drilling equipment. Primary workpiece materials listed by the manufacturer are steel and cast iron.

Installation Notes

Installation and use of small-diameter drill bits should be performed by qualified machinists or trade professionals familiar with proper feed rates and speeds for HSS tooling in ferrous materials. Secure the workpiece before drilling to prevent movement and bit breakage at this small diameter. Ensure the chuck is tightened fully before operation and that the drill bit is centered in the chuck jaws. Consult tooling speed-and-feed charts for HSS bits in steel and cast iron before setting spindle RPM.