Description

Drillco 428A204 1-1/16 High Spiral Flute 1/2 Shank Construction Reamer is designed for heavy-duty reaming in structural steel fabrication, bridge construction, and other demanding assembly applications. Its tapered point and high spiral flute design allow smooth entry into misaligned or undersized holes while promoting efficient chip removal and precise cutting performance. The 3-flats reduced shank provides a secure grip in the drill chuck. This reamer features four flutes for improved material removal and surface finish, a longer shank suitable for use in turret lathes, and countersinking angles commonly available at 60°, 82°, and 90°. Made from premium materials and crafted in the USA for reliable performance and durability.

Features:

1-1/16″ high spiral flute construction reamer with 1/2″ reduced shank
Tapered point for smooth entry into misaligned holes
High spiral flute design for efficient chip removal
Four flutes for improved removal rate and surface finish
3-flats reduced shank ensures secure grip
Longer shank suitable for turret lathes
Most common countersink angles available: 60°, 82°, 90°
Dynamax™ variable speed control for precision
Powerful 2-speed motor with reversible speed for tapping
Accudrill™ LED torque display for accurate drilling
Drilling capacity of 2 3/8” x 3” and use on material as thin as 1/8”

Benefits:

Precise alignment of structural steel components
Efficient chip removal with smooth, accurate finishes
Versatile for use with turret lathes and standard drill setups
Variable speed and LED torque display improve drilling control
Durable design extends tool life

Technical Specifications:

Model: 428A204
Size: 1-1/16″
Shank Size: 1/2″
Shank Type: 3-Flats Reduced Shank
Flute Type: High Spiral
Point Type: Tapered
Countersink Angles: 60°, 82°, 90°
Application: Heavy-duty reaming in construction, bridgework, and structural steel fabrication
Motor Features: Dynamax™ variable speed, 2-speed motor, reversible speed
Drilling Capacity: 2 3/8” x 3”
Material Compatibility: Suitable for material as thin as 1/8”