Cleveland C70319 No. 15 Screw Machine Drill Bit Hss

Product Description

The CLEVELAND C70319 is a No. 15 wire gauge screw machine length drill bit designed for high-volume drilling in tight clearance applications. Manufactured from high-speed steel with a bright uncoated finish, this bit features a 135-degree split point that reduces walking on entry and requires no center punch on most materials. The overall length of 2-3/16 inches and shortened flute geometry of 1-1/8 inches are characteristic of screw machine length tooling, providing greater rigidity and reduced deflection compared to jobber length equivalents. A licensed machinist or tool and die professional is the typical end user, though it sees regular use in production shop environments across trades.

This bit is suited for drilling alloy steel and aluminum in production and general machining applications where a rigid, short-bodied drill is required. The screw machine length format makes it well matched to drill presses, CNC machining centers, turret lathes, and screw machines where spindle-to-work distance is limited. The 0.1800-inch diameter corresponds to a No. 15 wire gauge and falls within the 0.1500 to 0.2000 inch drill bit size range. It conforms to ASME B94.11M and NAS 907 Type C specifications, meeting dimensional standards expected in aerospace and precision manufacturing environments.

Key Features

• No. 15 wire gauge diameter at 0.1800 inches with a tolerance of +0.0000 to -0.0007 inches
• 135-degree split point reduces entry walking and lowers thrust force on contact
• Web-thinned parallel web configuration improves chip evacuation and cutting efficiency
• High-speed steel construction rated for heavy-duty grade drilling duty cycles
• Straight-cylindrical shank at 0.1800 inches diameter fits standard drill chucks without adapters
• Meets ASME B94.11M and NAS 907 Type C dimensional standards

Compatibility

Designed as an OEM-style replacement or production supply drill bit compatible with standard straight-shank drill chucks; primary workpiece materials listed by the manufacturer are alloy steel and aluminum.

Installation Notes

This bit is installed by machinists and tool room technicians in chucked spindle applications. Secure the straight-cylindrical shank firmly in the drill chuck before operation and verify runout is within acceptable limits for the application. Cutting fluid or coolant is recommended when drilling alloy steel to extend tool life, noting this series does not support coolant-through delivery. Inspect the split point for chipping before each use, as a damaged point will affect hole location accuracy and tool life.