Contact us at 814-267-7100 or

ISO 9001:2015 Certified
Center Rock Inc. We Make Rock Disappear!
Close this search box.

Center rock inc.® products

ROTO LOC® Underreamer

ROTO LOC® Underreamer

ROTO LOC Overburden Drilling System

ROTO LOC is an overburden drilling system for casing advancement developed by CENTER ROCK, INC.® With wings that lock in place and are easily retractable, ROTO LOC is able to drill straight, full-diameter holes through any formation, including pinnacle limestone and karst. The lack of expensive starter casing J-teeth or ring bits needed means your team saves money by using ROTO LOC.

As the pilot bit rotates and makes contact with the ground, the system rotates into a locked position, and the wings are fully extended. While in this position, the wings are positively locked, ensuring that the pilot will drill a borehole to a fully expanded diameter until retracted.

The long nose on the pilot leads/guides the tooling through sloping and karstic formations, maintaining the desired angle and minimizing deviation. When the target is reached, with a slight bump backward, the system moves to the retracted position, allowing the wings to collapse inward. At that point, the bit is retracted from the casing, leaving the casing behind.

ROTO LOC is the ultimate underreamer system. It delivers straighter holes, minimizes casing friction, which can cause casing failures, requires NO expensive casing teeth, and provides industry-leading penetration rates.

Elevating Drilling Standards with Center Rock’s ROTO LOC Underreamer

At Center Rock, our commitment to innovation, precision, and efficiency drives every product we create. The ROTO LOC Underreamer is no exception. Designed with your most challenging drilling projects in mind, this advanced underreaming system exemplifies our dedication to pushing the boundaries of drilling technology.

Unlocking New Possibilities in Drilling Performance

  • Advanced Design for Unmatched Efficiency: The ROTO LOC Underreamer is engineered to tackle the toughest drilling environments, from pinnacle limestone to unpredictable karst formations. Its unique locking wing mechanism ensures straight, full-diameter holes, significantly reducing the risk of casing damage and project delays.

  • Cost-Effective Solutions for Your Drilling Needs: Understanding the cost pressures in drilling operations, we’ve optimized the ROTO LOC Underreamer to minimize the need for expensive drilling accessories. This focus on cost-efficiency, without compromising on quality, reflects our commitment to providing value-driven solutions.

  • Precision and Durability at Its Core: With sizes ranging from 5 1/2″ to 36″ (140-914 mm), the ROTO LOC Underreamer offers versatility while maintaining the highest standards of precision and durability. Each component is crafted to ensure peak performance, enabling you to drill with confidence.

  • Center Rock’s Promise of Excellence: Our team is dedicated to your success. The ROTO LOC Underreamer represents more than just a tool; it’s a testament to our promise of delivering excellence in every product. Backed by our expert support and service, we’re here to ensure your projects proceed smoothly, efficiently, and effectively.

Your Partner in Drilling Innovation

As you embark on your next drilling project, choose the ROTO LOC Underreamer for an experience defined by reliability, efficiency, and precision. With Center Rock, you’re not just selecting a product; you’re partnering with a team that stands by your side, committed to your project’s success from start to finish.

Explore the future of drilling with Center Rock. Together, let’s break new ground!

Check out all of our cutting-edge products for even more from CENTER ROCK, INC.®.

Advanced Design ROTO LOC Underreamer System Features & Benefits

  • Sizes from 5 1/2″ to 36″ (140-914 mm)
  • Wings lock in place to cut full diameter through any rock formation
  • No expensive starter casing teeth or ring bit left in the hole
  • Easily retractable wings
  • Straight holes in pinnacle limestone and karst, eliminating bent or broken casing
  • Positive locking wings can be used to retrieve casing.
  • Simple, quick wing replacement
Play Video

Let’s Talk

Contact Center Rock today to learn more about the ROTO LOC® Underreamer for your project needs.