Description
Drillco 427N220 1-5/16 Spiral Flute 3/4 Shank Nitro Construction Reamer is designed for heavy-duty reaming in structural steel fabrication, bridgework, and assembly projects. This Nitro construction reamer features a black and gold surface treatment that creates a hard protective layer, increasing hardness without brittleness while providing maximum lubricity. The spiral flute design improves chip removal, reduces heat buildup, and ensures precise, clean hole enlargements. Made from premium-grade cobalt high-speed steel (HSS), it can drill harder materials approximately 30% faster than standard HSS. The self-centering 135° split-point reduces walking and lowers thrust for controlled cutting, while the 3-flats reduced shank ensures secure, slip-free gripping in the chuck. The longer shank design is ideal for use in turret lathes and applications requiring extended reach.
Features:
- 1-5/16-inch Nitro spiral flute construction reamer with 3/4-inch shank
- Black and gold Nitro surface treatment for hardness and maximum lubricity
- Spiral flutes for efficient chip removal and consistent cutting
- Self-centering 135° split-point minimizes walking and reduces thrust
- 3-flats reduced shank prevents slipping in the chuck
- Most common angles for countersinking available: 60°, 82°, 90°
- 4 flutes for improved material removal rate and surface finish
- Longer shank for use in turret lathes and extended reach applications
Benefits:
- Ensures precise, clean, and smooth hole enlargements
- Handles harder materials efficiently and faster than standard HSS
- Improves chip removal and reduces heat buildup during cutting
- Provides versatility with multiple countersinking angles and flutes
- Durable construction minimizes replacement frequency and downtime
Technical Specifications:
- Model: 427N220
- Size: 1-5/16 inch
- Shank Size: 3/4 inch
- Shank Type: 3-flats reduced shank
- Point Type: Tapered point, 135° split-point
- Flute Type: Spiral flutes, 4 flutes for improved removal rate
- Material: Premium-grade cobalt HSS
- Surface Treatment: Black and gold Nitro coating for hardness and lubricity
- Shank Length: Longer shank for turret lathe use
- Countersink Angles: 60°, 82°, 90°
- Applications: Structural steel fabrication, bridgework, assembly, hard material reaming, turret lathe operations
Reviews
There are no reviews yet.