The small crawler mounted Dando Terrier has been designed as a multipurpose drilling rig capable of using techniques from drive sampling to down the hole hammer drilling (DTH.) It can deploy SPT (standard penetration test), dynamic probing and undisturbed sampling techniques for geotechnical investigation.
The rotary mast attachment for the Dando Terrier extends the rig’s range of use to include continuous flight and hollow stem augering, tricone & drag bits and rotary core drilling as well as DTH hammers. The Dando Terrier can offer the versatility of a multipurpose drilling rig yet remain small enough to fit through a standard doorway.
A two-piece drop hammer runs on two guide bars. The weight is fully guarded and can be quickly changed for SPT or dynamic probing standards.
Trip Hammer Speed: 0-50 blows per minute
Trip Hammer Drop: 500mm - 750mm
Trip Hammer Weight: 50kg or 63.5 kg
DRILL MAST ASSEMBLY
A fabricated, welded steel box section construction, hinge pin mounted to main superstructure, hydraulically raised and lowered.
Pull down capacity: 1000 kgf
Pull back capacity: 7000 kgf
Width: 655mm (including wheels) 1166m (jacks out)
The entire mast assembly with wheels can be detached from the main superstructure for operation in areas of restricted access.
A purpose built crawler chassis with rubber tracks fitted with tilt mechanism, allowing rig to operate vertically on slopes inclined up to 30 degrees from horizontal.
Overall length mast down: 2.70 m
Overall height mast down: 1.48 m
Total weight: 1126 kg
ENGINE AND HYDRAULIC PTO
Hydraulic system powered by a 16.8HP water-cooled diesel engine, provides power for drilling, rigging and tracking:
Flow for PTO: 38.88 l/min
Maximum Working Pressure: 175 bar
Rotary Concrete Coring Head
Hydraulic Remote Control Valve and Stand
Wireless Remote for Tracking
HYDRAULIC ROTARY DRILLING MAST AND HEAD
Driven by a hydraulic motor fitted with a 7 : 1 ratio gearbox with manual gear change, providing full controlled power and rotational speeds in forward or reverse. Integral side inlet water swivel with BW Rod connection fitted to travelling carriage plate with bolts.
Maximum Torque 155.6 ft-lb, 211Nm
Maximum Spindle Speed 360 r.p.m.
Maximum Torque 1089 ft-lb, 1477Nm
Maximum Spindle Speed 70 r.p.m.
Guide Ring: 170mm effective ID
MAST AND CARRIAGE ASSEMBLY
A fabricated welded steel box section construction fitted with a pair of wheels and two levelling jacks. Hydraulically raised and lowered by a single double-acting ram on the main Terrier undercarriage and attached via the pivot frame assembly.
Height= 2195mm(2.2m stroke); 1962mm (1.6m stroke)
FEED AND HOIST SYSTEM
Provided by a single double-acting ram transmitting adjustable hydraulic load to the rotary head.
Stroke: 2.2m to accommodate 2.0m effective length drill rods.
Stroke: 1.6m to accommodate 1.0m effective length drill rods.
Feed force: 1000kgf
CONTROLS AND HYDRAULIC POWER
Hydraulic functions of the hoist/feed and rotation are controlled from the main hydraulic control valve on the Terrier. Hydraulic power is supplied via PTO from the main Terrier hydraulic power pack.
Weight of Dando Terrier base assembly: 754kg
Weight of rotary head mast assembly attachment:
Long Mast 2.2 Stroke: 359kg
Short Mast 1.6 Stroke: 265kg
Set of stabilising jacks.