Cleveland C70341 No. 37 Screw Machine Drill Bit Hss

Product Description

The CLEVELAND C70341 is a No. 37 wire-size screw machine length drill bit ground from high-speed steel and designed for high-volume, precision drilling in tight-clearance setups. The bit measures 0.1040 inches in diameter with an overall length of 1-13/16 inches and a flute length of 13/16 inches. A 135-degree split point starts on contact without a center punch and reduces walking on curved or irregular surfaces. The bright, uncoated finish suits general-purpose use and allows easy visual inspection for wear. Two spiral flutes with a regular helix evacuate chips efficiently at production feed rates. This is a heavy-duty grade bit built to ASME B94.11M and NAS 907 Type C standards.

The C70341 is suited for drilling alloy steels and aluminum in screw machine, CNC lathe, and short-run production environments where stub-length rigidity reduces deflection. The short overall length reduces overhang, making this bit a practical choice for turret and gang-drill setups where clearance is limited. It installs in any standard straight-shank chuck or collet accepting a 0.1040-inch shank. Machinists, tool-and-die technicians, and maintenance mechanics working on production equipment are the primary users.

Key Features

• No. 37 wire size, 0.1040-inch diameter with a tight tolerance of +0.0000 to -0.0005 inches
• 135-degree split point for self-centering entry and reduced thrust force
• Screw machine (stub) length at 1-13/16 inches OAL for maximum rigidity
• Web-thinned parallel web configuration improves chip clearance and cutting efficiency
• High-speed steel construction, bright/uncoated finish, heavy-duty grade
• Meets ASME B94.11M and NAS 907 Type C specifications

Compatibility

Designed as a standard screw machine length drill bit for use in any straight-shank chuck or collet accepting a 0.1040-inch diameter shank; primary workpiece materials include alloy steel and aluminum.

Installation Notes

Install in a properly sized chuck or collet and verify runout before beginning a production run. Secure the workpiece firmly to prevent movement under cutting load. Check spindle speed against recommended surface footage for the workpiece material before drilling. Inspect the cutting edges and web for wear or chipping at regular intervals, as small-diameter bits are susceptible to breakage when dull or run at excessive feed rates.