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HDD70PR - 7-9" Reaming

  • Overview
  • Specifications
  • Parts list
  • Lubrication
  • Documents

Overview

The Mincon HDD Pull Reamer Hammers are the only pneumatic hammers being employed in the HDD industry and is designed around proven technology and redefines the performance scale when compared to other conventional HDD reaming tools on the market. While providing the most complete range of pilot hammers, Mincon also provides their world class design and technology including:

  • Patented reverse air flow hammer cycle allows for pull reaming of a pilot bore of 3-1/2” (89mm) out to 7-8” (178-203mm) and 4-1/4” (108mm) out to 9” (229mm) with the HDD70PR and pull reaming of a pilot bore of 5 1/4” (133mm) out to 10-12” (254-305mm) and 6 1/4” (159mm) out to 14” (356mm) on the HDD80PR.
  • A range of bits are offerred with different grades of standard carbide and diamond enhanced carbide to maximize bit life in every drilling condition.
  • High pressure/high volume compressed air powers reaming operations and requires minimal torque and feed pressure loads on drill machine increasing overall life of drill.
  • Attachments can be used to pull utilities as the hole is reamed.
  • Mincon 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.

Mincon HDD70PR Pullreamer Overview

Specifications

HDD70 Pilot Hammer Specifications2
Specifications Metric Imperial
Hammer Outside Diameter 165mm 6.5"
Hammer Length 1301mm 51.2"
Backhead Spanner Flat Size 150mm 5.91”
Drill Bit Shank Type HDD70PR
Hammer Weight (Less Bit) 136Kgs 301Lbs
Piston Weight 15.9Kgs 35Lbs
Make Up Torque (Chuck and Backhead) 6610 – 8813 NM 4875 – 6500 FT Lbs
Make Up Torque (Transmission shaft) 4068 – 5423 NM 3000 – 4000 FT Lbs
Make Up Torque (Rod Adaptor) 3050 – 4068 NM 2250 – 3000 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) 590 l/s @ 24.1 Bar 1250 cfm @ 350 psi

Parts list

HDD70PR EXPL
Item Description Part Number
HDD70PR Hard Rock 7-9" Pull Reaming Hammer 4" Rod Adaptor MBR701AS01
HDD70PR Hard Rock 7-9" Pull Reaming Hammer 3 1/2" Rod Adaptor MBR701AS02
HDD70PR Hard Rock 7-9 Pull Reaming Hammer 5" Rod Adaptor MBR701AS03
1 Piston MBR710PN01
2 Aligner MBR712BB01
3 Chuck MBR715CK01
4 7" HDD60PR Pull Reaming Bit 70PR70V50D
8" HDD60PR Pull Reaming Bit 80PR70V39D
9" HDD60PR Pull Reaming Bit 90PR70V39D
5 Rod Adaptor 4" OD 2 3/8" API Reg. Pin MBR716RA01
Rod Adaptor 3 1/2" OD 2 3/8" API Reg. Pin MBR716RA02
Rod Adaptor 5" OD 3 1/2" API Reg. Pin MBR716RA03
6 Air Diverter Plug (1/8" Orifice) MHS409DP02
7 Transmission Shaft MBR707TS01
8 Locking Pin MBR818RP01
9 Locking Bush MBR819LB01
10 Circlip MP618CP01
11 Check Valve Seat MBR817CT01
12 O Ring MBR820OR01
13 Air Diverter Plug (1/8" Orifice) MHS409DP02
14 Backhead MBR701BH01
15 Spring MB503SP01
16 Check Valve MD802CV01
17 Choke Blank MB506CH01
18 Inner Cylinder MBR708IC01
19 Wear Sleeve MBR711WS01
Service Kit MBR826SK01
10 Circlip MP618CP01
12 O Ring MBR820OR01
15 Spring MB503SP01
17 Choke Blank MB506CH01
Air Diverter Plug MHS409DP01

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 Pullreamer Range IconMincon HDD Pilot Hammer Range Brochure Mincon HDD70PR Service Manual IconMincon HDD70PR Operation and Service Manual HDD Product Catalog Front Page IconMincon HDD Product Catalog

mincon logoMincon 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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