Drillco 9/16 High Spiral Flute 1/2 Shank Nitro Construction Reamer (428N136)
Drillco 428N136 9/16 High Spiral Flute 1/2 Shank Nitro Construction Reamer is designed for heavy-duty reaming in structural steel fabrication and other demanding applications. Its tapered point allows smooth entry into misaligned or undersized holes, ensuring precise alignment and accurate sizing. The high spiral flute design promotes efficient chip removal and consistent cutting performance, while the 3-flats reduced shank provides a secure, slip-resistant grip. The black and gold surface treatment adds hardness and maximum lubricity, improving reamer life without increasing brittleness. Constructed from premium grade cobalt HSS, this reamer delivers superior performance in tougher materials.
Tapered point for accurate entry into misaligned or undersized holes
High spiral flute design for smooth cutting and effective chip evacuation
Premium grade cobalt HSS for drilling harder materials
3-flats reduced shank for a secure, no-slip grip
Black and gold surface treatment for hardness and maximum lubricity
Supports common countersink angles: 60°, 82°, 90°
6 flutes for very fast shearing cuts
Higher flute count reduces chip size and minimizes chatter
Ensures precise and consistent reaming results
Improves alignment of structural steel components
Handles heavy-duty applications efficiently
Reduces vibration and chatter for smoother finishes
Maintains durability in tougher materials
Produces clean, accurate holes quickly
Technical Specifications:
Type: Nitro Construction Reamer
Flute Style: High Spiral (6 flutes)
Shank: 1/2 in. 3-Flats Reduced Shank
Material: Premium Grade Cobalt HSS
Surface Treatment: Black and Gold
Point Type: Tapered
Applications: Structural steel fabrication, misaligned hole correction, heavy-duty reaming
Supported Countersink Angles: 60°, 82°, 90°
Product identification
- Brand: Drillco
- Model / MPN: 428N136
