Eagle Cutting Tool S400-031-I Hss Stub Drill Bit 31/64 in

Product Description

The EAGLE CUTTING TOOL S400-031-I is a 31/64-inch high-speed steel (HSS) stub-length drill bit with a 135-degree split-point tip. Stub-length drills are shorter than jobber-length bits, which reduces deflection and increases rigidity in applications where hole location accuracy is critical. The 135-degree split point geometry self-centers on contact, eliminating the need for a center punch on most materials and reducing walking on hard or slick surfaces. This bit is suited for use in drill presses, CNC machining centers, and handheld power drills across metal fabrication, maintenance, and repair work.

This stub drill is designed for drilling ferrous and non-ferrous metals, plastics, and composite materials in shop and field environments. Its reduced flute length and compact body make it especially well-suited for close-quarters drilling, short-depth holes, and applications where a standard jobber drill would flex or chatter. Machinists, maintenance technicians, pipefitters, and general metalworkers are the primary users.

Key Features

• 31/64-inch diameter for precise fractional sizing
• High-speed steel (HSS) construction for durability across a range of workpiece materials
• 135-degree split-point tip self-centers and reduces walking on startup
• Stub-length body increases rigidity and reduces deflection compared to jobber-length bits
• Compatible with standard drill chucks and CNC tool holders accepting round-shank tooling

Compatibility

Designed as a standard round-shank stub-length drill bit compatible with any drill press, CNC machining center, or handheld power drill chuck that accepts 31/64-inch round-shank tooling.

Installation Notes

Secure the bit firmly in the chuck and verify concentricity before drilling. Always wear appropriate eye protection and secure workpieces to prevent rotation. When drilling metal, use cutting fluid or coolant to extend tool life and improve hole finish. Inspect the cutting edges before each use and replace the bit if chipping or excessive wear is observed.

Technical Specifications

• Diameter: 31/64 inches
• Point Angle: 135 degrees split point
• Material: High-Speed Steel (HSS)
• Length Type: Stub
• Weight: 0.95 pounds
• Minimum Order Quantity: 1

Standard Information

• Brand: EAGLE CUTTING TOOL
• Manufacturer Part Number: S400-031-I