Drillco .776 High Spiral Flute 1/2 Shank Nitro Construction Reamer (428N149)

Description

Drillco 428N149 .776 High Spiral Flute 1/2 Shank Nitro Construction Reamer is built for heavy-duty reaming in structural steel fabrication, bridgework, and industrial assembly applications. The tapered point provides smooth entry into off-center or misaligned holes, ensuring precise and accurate hole enlargements. Its high spiral flutes and Nitro surface treatment improve chip removal, reduce heat buildup, and deliver a clean, smooth surface finish. The 3-flats reduced shank ensures a secure, slip-free grip in the chuck for demanding fabrication tasks.

Features:

• .776-inch high spiral flute Nitro construction reamer with 1/2-inch shank
• Tapered point for smooth entry into misaligned or undersized holes
• High spiral flutes for efficient chip removal and smooth surface finish
• 3-flats reduced shank for secure, slip-free chuck grip
• Most common angles for countersinking available: 60°, 82°, 90°
• 6 flutes for very fast shearing cuts
• Higher flute count reduces chip size and chatter

Benefits:

• Ensures precise, clean, and accurate hole enlargements
• Improves chip removal and reduces heat buildup during cutting
• Minimizes chatter for smoother cutting performance
• Durable construction for long-lasting industrial use
• Reliable performance in structural steel and bridgework applications

Technical Specifications:

• Model: 428N149
• Size: .776 inch
• Shank Size: 1/2 inch
• Shank Type: 3-flats reduced shank
• Point Type: Tapered point
• Flute Type: High spiral flutes, 6 flutes for fast shearing
• Countersink Angles: 60°, 82°, 90°
• Surface Treatment: Nitro hard, protective coating
• Applications: Structural steel fabrication, bridgework, industrial assembly