Geonex hole / bit openers

Geonex hole openers are designed to enlarge pilot holes in solid rock efficiently and accurately. By following a staged reaming process, they allow contractors to increase hole diameter in multiple steps—while maintaining alignment and reducing air consumption.

Key Specifications

  • Reams pilot holes up to 850 mm (33½”)
  • Accurate reaming in solid rock
  • Reduces air consumption during flushing
  • Ideal for mining, utilities, and special projects
165 mm
Most common pilot hole size
1100 mm
Maximum achievable bore diameter
4 steps
From pilot hole to full diameter
2
Drilling methods - Straight Line and Steerable boring

Geonex bit openers

Cost-Efficient Reaming with Precision

Geonex Hole Openers are engineered for expanding pilot holes into larger bore sizes—reliably and efficiently. Ideal for solid rock, the reamers follow the pilot hole with high precision, making them well-suited for demanding environments like mines, infrastructure tunnels, or utility inlets. Their geometry reduces the need for excess compressed air, keeping operating costs under control while maintaining flushing efficiency throughout the reaming process.

Versatile Use in Specialized Installations

Geonex hole openers are commonly used in applications such as ventilation shafts, utility entries, and HDD conductor barrels. They provide a controlled way to enlarge bores without oversized rigs—making them ideal for projects where space is limited or where accuracy and reaming efficiency are critical.

Hole Openers Steps

Hole enlargement is carried out in stages, starting from a Ø165 mm (6½”) pilot hole and progressing through defined steps. The process allows bore diameters to grow incrementally—up to Ø850 mm (33½”)—ensuring stability, accuracy, and adaptability to jobsite requirements. Custom step sizes are also available upon request, making the solution flexible for both standard and specialized applications.

PILOT HOLE
Ø 165 (6 1/2”)
1st enlargement step
Ø 165 (6 1/2”) – Ø 254 (10”)
2nd enlargement step
Ø 254 (10”) – Ø 450 (18”)
3rd enlargement step
Ø 450 (18”) – Ø 650 (25 1/2”)
4th enlargement step
Ø 650 (25 1/2”)– Ø 850 (33 1/2”)

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Privacy Policy

1. Introduction

In accordance with the EU regulations Geonex Oy (hereinafter referred to as “Geonex” and/or “we” and/or “us”) is responsible for the processing of your personal data. Looking after the personal data you share with us is a responsibility we don’t take lightly. We want you to be confident that your data is secure with us, and understand how we use it to offer you a better customer experience.

2. Data controller

Geonex Oy (Business ID: 2134727-3)

3. Contact details for matters related to the register

Email address: kimmo.juvani@geonex.fi

Street address: Teollisuustie 9, 95600 Ylitornio, Finland

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Customer, partnership and marketing register.

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We only process your personal data if this is permitted by an applicable legal regulation. The processing of your data is based on a contractual relationship between a customer/partner and Geonex, or a separate consent for the processing of customer information. The goal for the register is to make services available to you, manage and improve our day-to-day operations, personalise your Geonex experience as well as contact and interact with you.

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We may need to transfer your personal data outside of the European Economic Area (EEA) if it is necessary for the realisation of the service. In such cases, we will make sure that any transfer of your personal data is subject to appropriate protections as if it were being processed inside the EEA.

10. Data subject’s rights related to data processing

We know how important it is to protect and manage your personal data. You have the right to see the personal data we hold about you. Also, the data controller only collects and processes information that is necessary for its operations. Personal data that we process for any purpose or purposes shall not be kept for longer than is necessary for that purpose or those purposes.

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12. Amendments

We may update this policy from time to time by publishing a new version on our website. You should check this page occasionally to ensure you are happy with any changes to this policy.

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