Tunnel jumbo drilling rig DD422i

Sandvik DD422i has the widest range of automatic drilling functions, able to achieve reduced over-breaking with maximized pull-out per blast. It’s the ideal choice for underground mine development and small-scale tunneling. Optimized working environment Optimize your operator’s comfort with a modern, ergonomic cabin, designed to improve visibility while reducing noise levels. TFX telescopic feed In limited spaces where both long and short rods are required, the TFX telescopic feed allows multipurpose drilling. Bolt hole drilling, face drilling, bolt installation and cross-cuttings are all possible. Dual controls The dual controls option allows true multipurpose usage of the drill, improving fleet optimization, versatility and performance. DD422i can be used across multiple applications. Tramming type and distance Hydrostatic transmission - Diesel engine - QSB4.5 (119 kW Tier 3 Stage IIIA ) Hydrostatic transmission - Diesel engine - TCD2.2 (55 kW, Tier 4F, Stage V) Hole diameter 43 - 64 mm Number of booms 2 x ​SB60 / SB60i Drift size (H x W) 4.5 x 4.5 m Feed length Fixed TF500 12 to 20 ft. or telescopic TFX 6-12 ft. to 10-16 ft. Rock drill RD525 25kW Voltage 380 - 1,000 V (multi voltage) Controls type SICA (Sandvik Intelligent Control System Architecture) Weight 26,000 kg (depending on options)