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HDD70 - 7 ½" Pilot Holes

  • Overview
  • Specifications
  • Systems
  • System Components
  • Parts list
  • Lubrication
  • Documents

Overview

HDD70 Pilot Hammer Overview
The Mincon HDD70 Hard Rock Pilot Hammer is designed around proven technology to perform at the top end of the performance scale compared to other tools on the market. While providing the most complete range of pilot hammers, Mincon also provides their world class design and technology including:

Key Features and Benefits

  • Dual steering point design incorporating slanted drill bit and 2° bent sub provides more responsive steering capabilities while transitioning in and out of rock formations.
  • High frequency hammer cycle transmits less vibration that can be detrimental to sensitive electronics. Rock formations fracture into smaller pieces which are easier to flush out of the bore hole. Less Stress Transmits to pipe joints and gearbox assembly reducing maintenance requirements to drill. Provides the most effective steering in any pneumatically powered HDD system.
  • High pressure/high volume compressed air powers drilling operations and requires minimal torque and feed pressure loads on drill machine increasing overall life of drill.
  • Shorter body design compared to competitive models allows for easier steering in the bore hole and less rotational stresses on hammer body.
  • Existing locating electronics (DCI, Subsite, or WIRELINE) can be used with no additional cost to the contractor.
  • Support Station delivers compressed air mixed with a water/polymer (5-9 gal/min) and rock drill oil (2-4 pints/hr) to operate the drilling cycle resulting in minimal environmentally friendly clean up. Can be used on environmentally sensitive locations using Mincon Envirosafe RDO biodegradable rock drill oil.

Specifications

HDD70 Pilot Hammer Specifications
Specifications Metric Imperial
Hammer Outside Diameter 146mm 5.75"
Hammer Length (Sonde Backhead Shoulder to Chuck) 1951mm 76.8"
Backhead Spanner Flat Size 134mm 5.28"
Drill Bit Shank Type HDD70
Pilot Bit Size 190mm 7. 5"
Hammer Weight (Less Bit) 158.6Kgs 327.5Lbs
Piston Weight 20 Kgs 44 Lbs
Bent Sub to Wear Sleeve Stand Off 0.75mm 0.030"
Make up Torque 6100-8135 NM 4500-6000 FT Lbs
Recommended Minimum Air Package (<250ft Bore Length) 425 l/s @ 24.1 Bar 900 cfm @ 350 psi
Recommended Minimum Air Package (>250ft Bore Length) 519 l/s @ 24.1 Bar 1100 cfm @ 350 psi

Systems

Item Description Part Number
Mincon HDD70 Hard Rock System with Support Station MHDD70AS01
1 Mincon HDD70 Hard Rock Hammer Crate MHDD70AS11
2 Mincon Support Station Complete M103 072 01

System Components

Item Description Part Number
Mincon HDD70 Hard Rock Hammer Crate MHDD70AS11
1 Mincon HDD70 Sonde Housing MHS601AS01
2 Mincon HDD70 Hammer MHD601AS01
3 DCI 15" Sonde Carriage MN585
4 Sonde Torque Wrench MN553
5 Sonde Line up Tool MN551
6 Service Kit (Hammer) MHD626SK01
7 Service Kit (Sonde Housing) MHS626SK01
8 Plusco Thread Sealant MN730
9 Drill Bit x 2 74HD70SDIRD
10 HDD70 Timing Shim (0.015") x 2 MN07015
11 HDD70 Timing Shim (0.030") x 2 MN07030
12 HDD70 Timing Shim (0.060") x 2 MN07060

Item Description Part Number
Mincon Support Station Crate M103 072 01
1 Mincon Support Station M103 036 90
2 20 Foot x 2" 1000 PSI High Pressure Hose with Hammer Lock Couplings M103 038 43
3 30 Foot x 2" 1000 PSI High Pressure Hose with Hammer Lock Couplings M103 038 44
4 40 Foot x ¾" Water Hose with ¾" Camlock couplings M103 038 45
5 Safety Whip Checks x 4 M103 020 71

Parts list

HDD70 EXPL
Item Description Part Number
Mincon HDD70 Sonde Housing MHS601AS01
1 Sonde Housing Backhead (3 ½" API Reg. Pin) MHS601BH01
2 Air Diverter Plug (1/8" Orifice) MHS409DP02
3 Sonde Spacer MHS402SS01
4 Compression Ring MHS305LR01
5 Sonde Carriage (Not Included) MN585
6 O Ring MHS621OR01
7 Diverter MHS605DV01
8 O Ring MHS621OR01
9 Sealing Sleeve MHS606SL01
10 O Ring MHS621OR01
11 Sonde Housing Sleeve MHS604SH01
12 O Ring MHS621OR01
13 Carriage Guide MHS607CG01
14 O Ring MHS621OR01
15 Locating Pin MHS608LP01
Service Kit MHS626SK01
Air Diverter Plug (Solid) MHS409DP01
O Ring Kit (Items 6, 8, 10, 12,14) MHS425OK01
Mincon HDD70 Hammer MHD601AS01
16 Bent Sub MHD601BH01
17 Choke Blank MB506CH01
18 Check Valve MB502CV01
19 Spring MB503SP01
20 Steel Make up Ring MD604SM01
21 Lock Ring MD605LR01
22 Air Distributor MD607DR01
23 O Ring MD621OR01
24 O Ring MD620OR01
25 Seating Ring MD609SR01
26 Inner Cylinder MD608IC01
27 Piston MD610PN01
28 Wear Sleeve MHD611WS01
29 Piston Retaining Ring MD612PR01
30 Aligner MHD613BB01
31 O Ring MD622OR01
32 Bit Retaining Ring MHD614BR01
33 O Ring MD621OR01
34 Chuck HDD70 MHD614CK01
35 Drill Bit 74HD70SDIRD
Service Kit MHD626SK01
17 Choke Blank MB506CH01
Choke 1/8" (3.2mm) MB506CH02
Choke 3/16" (4.8mm) MB506CH03
19 Spring MB503SP01
O Ring Kit (Items 23, 24, 31, 33) MHD625OK01

Lubrication

DTH hammers must receive a constant supply of proper rock drill oil to protect the internal components and to provide a good air seal between the hammer\'s running surfaces for efficient drilling. Mincon recommends the use of Mincon Envirosafe® Rock Drill Oil (RDO) to maintain optimal performance and extend the life of the internal components. The correct consumption of oil is dependent upon the air volume and conditions. Please refer to the lubrication graph below for recommendations. When drilling in wet conditions the normal amount should be doubled. There should be visual evidence of oil around the drill bit shank and within the tube joints when changing tubes.

If using petroleum based rock drill oils, the recommended grade of oil is dependent on the ambient temperature and the operating pressure. As a rule of thumb, ISO320 grade rock drill oil should be used whenever possible as the hammer is a high frequency tool, however, where the pump cannot pump the oil in colder conditions, a lower grade of oil can be used as per the graph below.

Mincon Oil Grade Chart WebMincon Oil Consumption Chart WebMincon Envirosafe RDO

Documents

Mincon PLC HDD Pilot Range IconMincon HDD Pilot Hammer Range Brochure Mincon HDD70 Service Manual IconMincon HDD70 Operation and Service Manual HDD Product Catalog Front Page IconMincon HDD Product Catalog

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About Mincon

Mincon Group PLC was founded in 1977 in Shannon, Ireland. Mincon develops, manufactures, and distributes a range of precision engineered hard-rock drilling tools for a variety of applications, including mining, exploration, water well, geothermal, construction, horizontal directional drilling, oil-gas and energy.

Mincon has earned its reputation as The Driller’s choice by working closely with customers to inform the continuous development and improvement of its world-class products.

Contact Info

Mincon Group PLC
Smithstown Industrial Estate 
Shannon 
Co. Clare 
Ireland

Tel: +353 (61) 361-099
Fax: +353 (61) 361-808

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