HD822 Drifter – Better Penetration with Increased Impact

PERFORMS IN HARDER ROCK AT A LARGE DIAMETER

The HD800 series drifter is designed to minimize drill noise and vibration without sacrificing performance. Incorporating a new piston design, the HD800 series drifter maximizes energy transmission and drills effectively in a variety of rock types.

New Piston Actuation

A new piston actuating mechanism performs with 26% more percussion and generates 20% more power at the same time, outperforming the FRD’s HD712 drifter.

Dual-Damper System DDS

FRD has developed the Dual-Damper System, a first in the industry. For maximum energy transfer, active DDS minimizes the return of shock waves by keeping the bit firmly against the rock at all times during drilling.  It also minimizes percussion energy loss, and by optimizing the overall feed force, greatly improves the life of drilling accessories. An additional benefit is the greatly improved life of drilling accessories. Active DDS (U.S. Patent No. 5,896,937).

Wedge Type Piston

The drifter’s wedge type piston allows for greater impact efficiency.

Features & Benefits
HD822 Drifter attached to a machine | Furukawa FRD

HD822 Drifter

HD822 Drifter Features & Benefits

  • Minimizes drill noise and vibration, while increasing performance.
  • With 20% more impact, this drill has the ability to perform in harder rock at a larger diameter.
  • New design increases percussion frequency by 26% versus the HD712 drifter.
  • Dual Damper System (DDS) stabilizes the bit against the rock, ensuring efficient energy transfer and straighter holes.
  • DDS automatically adjusts the drifter for maximum performance regardless of the rock condition.
Specifications

HD822 Specifications

 US Standard   Metric   
Max. Impact Pressure2,900 psi20Mpa
Blow - Long Stroke, BPM2,700
Blow - Short Stroke, BPM3,300
Max. Impact Output - Long Stroke29.5 hp22.0 kW
Stroke Adjustmentvariable type
Max. Rotation Torque1,045.1 ft-lbs1,417 Nm
Max. No. of Rotation Per Minute190
Flushing SystemSwivel Type
The contents of these specifications are subject to change without notice.