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TOA-TONE BORING CO.,LTD.

DTH hammer with TONE's original design being popularly used and licensed in overseas

DTH hammer is a percussion system driving a piston inside hammer body with up and donw motion by compressed air and transmitting an intensive percussion energy to the bit to enable the drilling by crushing the rock. Drilling method by DTH hammer exerts high drilling performance especially for drilling hard rock and contributes for shortening work schedule. Hence, this method is widely utilized for foundation work, landslide prevention work, quarrying services, marine civil work, etc.
DTH hammer is called as Down-the-Hole hammer and is the technology applied for the method (Plan B) of rescue hole construction for mining accident in Chile, 2010.

Product introduction

Application Series
of Model
Features Model Name
DTH Hammer MACH Large Hole Diameter
Vertical hole drilling for rock
MACH-50M MACH-80M MACH-137M MACH-145M MACH-183M
HHD Multi-DTH Hammer System
Horizontal hole drilling for rock
HHD-400 HHD-600      
Bit for DTH hammer SUPER
JAWS
Retractable Bit 15 Standard Models ( 2 - 4 wings)

MACH

MACH system composed of multi-DTH hammers is suitable for vertical hole drilling with large hole diameter. Features of MACH system with TONE's original technology are shown as below.
  • Applicable of operation with reverse circulation system
  • By means of stand pipe installation, MACH system is applicable to drilling for rock, highly collapsing formation and on off-shore.
  • Since stand pipe is filled with reverse circulation fluid, drilling by DTH hammer can be carried out with less noise and vibration.
  • As the actuated air passes through air pipes to the ground without flushing into the hole, drilled hole can be kept stable.
Model Name MACH-50M MACH-80M MACH-137M MACH-145M MACH-183M
Drilling diameter(mm) 500 800 1370 1450 1830
Hammer Model Name AD-150M AD-250M
Quantity 2 2 6 6 6
Air consumption
(m3
0.69 MPa 15 30 90 90 120
0.98 MPa 25 50 150 150 200
Reverse diameter(mm) 150 200

TOA-TONE BORING CO.,LTD.

TOA-TONE BORING CO.,LTD.
MACH
TOA-TONE BORING CO.,LTD.
MACH
TOA-TONE BORING CO.,LTD.
MACH

HHD

HHD is multi-DTH hammer system with a mechanism for correcting the deflection of drilled hole by adjusting air pressure for horizontal hole drilling. Feature of HHD system with TONE's original technology are shown as below.
  • HHD system is composed of three DTH hammers which are independently actuated and enables to correct at any drilling direction.
  • By monitoring the target located at hammer case center at real time, the need of correction of hole deflection can be checked.
  • Retractable bits are equipped as standard.
  • Applicable to collapsing formation by adjusting percussive energy.
Model Name HHD-400 HHD-600
Drilling diameter Expanded diameter(mm) 425 630
Retracted diameter(mm) 384 580
Applicable hammer Air consumption
(1.03MPa)
20.1m3/min 32.7m3/min
Air consumption
(1.72MPa)
35.4m3/min 55.5m3/min
Applicable steel pipe φ406.9×t7.9mm φ609.6×t9.5mm
Overall length(mm) 1350 1700
Weight(kg) 833 2219

TOA-TONE BORING CO.,LTD.

TOA-TONE BORING CO.,LTD.
HHD
TOA-TONE BORING CO.,LTD.
HHD:Scene of expanding
TOA-TONE BORING CO.,LTD.
HHD:Scene of retracting

SUPER JAWS

SUPER JAWS has bit structure as to that the drilling for main area is done by bit body while only reaming is done by wing bit, unlike slide type retractable bit or eccentric type retractable bit, and is a remarkable retractable bit with transmission efficieny of percussinve energy to the maximum.
Features of SUPER JAWS with TONE's original technology are shown as below.
  • By pursueing the simplification of bit structure, the durability of component parts and bits is remarkably improved.
  • The bit with symmetrical structure distributes the bit load uniformly, resulting in high vertical accuracy of drilled hole.
  • Bit structure allows a smooth removal of cuttings.
  • The bit can be used for wide ground formation from overburden to hard rock.
Model Name No. of Wing Bit Diameter(mm) Applicable casing size(mm)
At expanding At retracting Inner diameter Outer diameter
T115 2 148.0 115.0 130.8 139.8
T140 2 185.0 141.0 155.2 165.2
T190 3 237.0 191.0 204.7 216.3
T280 3 341.0 282.0 301.7 318.5
T315 3 373.0 315.0 336.6 355.6
T365 4 430.0 365.0 387.4 406.4
T410 4 478.0 412.0 435.0 457.2
T455 3 530.0 455.0 482.6 508.0
T510 4 581.0 506.0 533.4 558.8
T560 4 632.0 556.0 584.2 609.6
T610 3 682.0 605.0 635.0 660.4
T660 4 733.0 656.0 685.8 711.2
T710 4 784.0 707.0 736.6 762.0
T760 4 835.0 758.0 787.4 812.8
T810 4 886.0 809.0 838.2 863.6

TOA-TONE BORING CO.,LTD.

TOA-TONE BORING CO.,LTD.
SUPER JAWS(Two wings)
TOA-TONE BORING CO.,LTD.
SUPER JAWS(Four wings)
TOA-TONE BORING CO.,LTD.
SUPER JAWS(Four wings)