Sandvik DD421 Record Breaker

Sandvik DD421 boosts productivity in mine development and small scale tunneling. Powered by new efficient rock drills, robust booms and a wide selection of feeds, it offers an optimal coverage of 60 m2.

The new carrier layout is specifically designed for safe access to all service points, and all daily maintenance is conducted at ground level. Adjustable drilling settings of the new hydraulic control system optimize drilling performance in any conditions. To ensure highly accurate drilling results and enable valuable feedback information of the drilling process, the drill rig can be equipped with TCAD™ instrumentation.

The DD421 is the successor to the proven Sandvik DD420 drill rig, with even greater serviceability, and improved performance. The modular design makes training, operating and maintenance of the fleet easier.

Key features • Drilling booms providing 8 – 60 m2 cross sections • 25 kW rock drills • TCAD/TLOG instrumentation • Fast and efficient mobile carrier

Sandvik DD421-60C

Main dimensions, Sandvik DD421-60C

www.sandvik.com

Coverage and turning

Technical data

Model Drift size classheight x width

m (ft)

Coveragem2 (ft2)

Max tunnel sizem (ft)

Rock drill Hole sizemm (in)

Feed length

ft

Controls Canopy/ cabin

DD421-60 4.5 x 4.5 (15 x 15)

8 - 60(86 - 646)

6.6 x 9.9(21’8” x 32’6”)

RD525HLX5

43 - 64(1 3/4 - 2 1/2)

10 to 16 Hydr. Canopy

DD421-60C 4.5 x 4.5 (15 x 15)

8 - 60(86 - 646)

6.6 x 9.9(21’8” x 32’6”)

RD525HLX5

43 - 64(1 3/4 - 2 1/2)

10 to 16 Hydr. Cabin

DD421-S60C 4.5 x 4.5 (15 x 15)

8 - 60(86 - 646)

6.6 x 9.9(21’8” x 32’6”)

RD525HLX5

43 - 64(1 3/4 - 2 1/2)

10 to 16 Electr. Cabin

3080

15° 18°

3150

450

3530 1200

Feed Total length

TF 500–10’ 12 500

TF 500–12’ 13 050TF 500–14’ 13 250TF 500–16’ 13 700TFX–6/12’ 12 800TFX–8/14’ 12 900TFX–10/16’ 13 000

9190

1500

9970

200

2145

4340

6685

2310

R3350

750

750

R1W

10°

5°

40°

Feed R1 W

TF 500–10’ 6 650 3 770

TF 500–12’ 6 800 3 920TF 500–14’ 6 950 4 070TF 500–16’ 7 100 4 250

® 2

011

Sand

vik

Min

ing

and

Con

stru

ctio

n O

y