Eagle Cutting Tool S400-021-I Hss Stub Drill 21/64

Product Description

The EAGLE CUTTING TOOL S400-021-I is a 21/64 inch high-speed steel (HSS) stub drill designed for general-purpose drilling in metal, wood, and plastic. Stub drills feature a shorter flute length than jobber-length bits, which reduces deflection and improves rigidity when drilling in tight spaces or on drill presses and lathes. The HSS construction provides reliable hardness and heat resistance for everyday shop and field work. This bit is suited for machinists, pipefitters, electricians, and other tradespeople who need a compact, accurate drill for close-quarters applications.

The S400-021-I is appropriate for use in residential and commercial applications where a shorter, stiffer drill profile is preferred. Typical scenarios include drilling through sheet metal, structural steel, conduit fittings, or pipe flanges where a standard-length bit would flex or wander. The stub length makes it a practical choice for drill press work or for use in tight enclosures where bit overhang must be minimized.

Key Features

• 21/64 inch diameter for precise, consistent hole sizing
• High-speed steel (HSS) construction resists heat buildup during drilling
• Stub flute length reduces deflection and improves hole accuracy
• Compact profile suited for restricted-access drilling locations
• Minimum order quantity of 1 — available as a single unit

Compatibility

Designed as an OEM-style replacement or direct-fit stub drill for standard 3-jaw drill chucks and keyed chuck systems accepting 21/64 inch shank drill bits.

Installation Notes

Stub drills are installed and operated by machinists, pipefitters, electricians, and general tradespeople using standard drill presses, hand drills, or lathes. Always secure the workpiece and ensure the chuck is fully tightened before operation. Use appropriate cutting fluid when drilling ferrous metals to extend bit life and reduce heat. Inspect the cutting edges for wear before each use and replace the bit if chipping or dulling is observed.

Technical Specifications

• Drill Diameter: 21/64 inch
• Material: High-Speed Steel (HSS)
• Drill Type: Stub Length
• Weight: 0.95 pounds
• Minimum Order Quantity: 1

Standard Information

• Brand: EAGLE CUTTING TOOL
• Manufacturer Part Number: S400-021-I