Drillco construction reamer details
Drillco 21/32 High Spiral Flute 1/2 Shank Nitro Construction Reamer (428N142)
Drillco 428N142 21/32 High Spiral Flute 1/2 Shank Nitro Construction Reamer is designed for heavy-duty reaming in structural steel fabrication, bridge construction, and automotive assembly. Its high spiral flute design ensures efficient chip removal and precise hole enlargement. Nitro surface treatment adds hardness without brittleness, and the black and gold finish provides maximum lubricity. The 3-flats reduced shank ensures a secure fit in drill chucks. Made in the USA.
21/32" high spiral flute construction reamer with 1/2" shank
Tapered point for easy entry into off-center holes
High spiral flute design with 6 flutes for fast shearing cuts
Higher flute count reduces chip size and chatter
Most common countersinking angles available: 60°, 82°, 90°
3-flats reduced shank for secure chuck grip
Nitro surface treatment for added hardness and lubricity
Ensures precise hole enlargement and alignment in structural applications
Efficient chip removal and reduced chatter improve cutting quality
Nitro treatment allows drilling harder materials without brittleness
Technical Specifications:
Type: High Spiral Flute Nitro Construction Reamer
Shank Size: 1/2"
Flute Type: High Spiral, 6 flutes
Point Type: Tapered
Material: Premium Cobalt HSS
Shank Design: 3-flats reduced shank
Surface Treatment: Black and gold Nitro finish
Applications: Structural steel fabrication bridge construction automotive assembly
Product identification
- Brand: Drillco
- Model / MPN: 428N142
