Cleveland C04599 Screw Machine Drill Bit 31/64 in Hss

Product Description

The CLEVELAND C04599 is a screw machine length drill bit designed for high-speed steel drilling in general-purpose metalworking applications. With a 31/64 inch (0.4844 inch) diameter and a 118-degree standard point angle, this bit delivers consistent, accurate entry into alloy steel, aluminum, and similar workpiece materials. The bright uncoated finish suits a wide range of cutting fluids and dry applications. At 3-11/16 inches overall length, the shortened body gives the bit added rigidity compared to jobber-length equivalents, reducing deflection during through-hole and blind-hole operations on drill presses, lathes, and CNC turrets.

This drill bit is suited for production and maintenance machining environments where compact tool length improves control and reduces chatter. The screw machine length profile is a common choice in turret lathe work, gang drilling fixtures, and tight-clearance setups. It is appropriate for both manual drill press work and light CNC drilling cycles in ferrous and non-ferrous metals. Machinists, tool and die shops, and general metalworking facilities regularly stock this size for standard fastener-hole and close-tolerance drilling tasks.

Key Features

• 31/64 inch diameter with a tight tolerance of +0.0000 to -0.0010 inches for consistent hole sizing
• 118-degree standard point angle for broad material compatibility including alloy steel and aluminum
• Screw machine (short) length body at 3-11/16 inches OAL reduces deflection and improves rigidity
• Web-thinned construction lowers thrust requirements and improves chip evacuation
• High-speed steel construction provides durability across general-purpose metalworking conditions
• Right-hand cut with a straight cylindrical shank for use in standard drill chucks and collet holders

Compatibility

Designed as a general-purpose screw machine length drill bit for use in alloy steel and aluminum workpieces, compatible with any drill press, turret lathe, or CNC machine equipped with a chuck or collet accepting a 0.4844 inch straight cylindrical shank.

Installation Notes

Installation and use of this drill bit should be performed by qualified machinists or trained tradespeople familiar with cutting tool setup and safe drilling practices. Ensure the spindle and workpiece are fully secured before engaging the cutting edge. Follow applicable ASME and shop safety standards when selecting feed rates and cutting speeds for the workpiece material. Inspect the cutting edges for wear or damage before each use and replace the bit if the point geometry is compromised.