In underground mining, every second counts. Whether you’re working in a narrow stope or drilling at an awkward angle, the equipment you rely on directly impacts how fast the job gets done — and how safely. At GME Drills, we’ve spent years engineering jackleg drills and pusher legs that genuinely make a difference on the ground. In this post, we’re breaking down exactly how our pusher legs work alongside our jackleg drills to boost drilling speed and improve operator productivity, shift after shift.

Why Pusher Legs Matter More Than You Think

Most conversations about drilling focus on the drill itself — power, air consumption, impact rate. But the pusher leg is just as critical. It controls feed force, supports the drill’s position, and directly affects how much effort an operator has to exert throughout a shift. A poorly matched or poorly designed pusher leg means slow drilling, operator fatigue, and higher maintenance costs. A well-designed one? It transforms the working experience entirely.

GME’s pusher legs are purpose-built for specific drills in our lineup, which means they’re optimized — not generic. Let’s look at what makes each one stand out.

GP755A Pusher Leg — Purpose-Built for the G250

The GP755A pusher leg was designed from the ground up to pair with the G250 – Jackleg Drill. Nothing about this combination is left to chance. The pusher leg controls are integrated directly into the G250 drill backhead, putting everything the operator needs right at their fingertips. Push-button jackleg retraction makes repositioning fast and intuitive, reducing the awkward fumbling that eats into productivity on longer shifts.

Balanced weight distribution is another key feature. Jackleg drilling often requires working at challenging orientations — overhead, angled, or in tight spaces — and unbalanced equipment turns every one of those positions into a physical strain. The GP755A’s weight balance keeps the operator in control without burning them out. Parts are also interchangeable with the Boart Longyear A755 pusher leg, which is a practical advantage for operations that maintain mixed equipment fleets.

GP7 Pusher Leg — The Workhorse for G83F Operators

For teams running the G83F – Jackleg Drill, the GP7 pusher leg is the natural match. Like the GP755A, it integrates its controls directly into the rear of the G83F drill head, keeping the operator’s workflow smooth and uninterrupted. But there are a few features that make the GP7 particularly well-suited to high-demand environments.

First, it’s manufactured from space-grade aluminum alloy — not standard aluminum, but aircraft-quality tubing selected for its strength-to-weight ratio. That matters in underground mining, where every kilogram of carry weight compounds over a full shift. The large-diameter piston provides excellent forward force, which translates directly into faster penetration rates and fewer instances of the drill stalling under resistance.

The GP7 is available in three sizes — 56 inches, 42 inches, and 36 inches — making it adaptable to a wide range of working heights and stope configurations. Its parts are interchangeable with the MID WESTERN / RNP S83 push leg, giving maintenance teams flexibility when sourcing spares. Minimal maintenance requirements and a robust, simple design mean less downtime and more drilling time.

The Drills They’re Built For

It’s worth understanding the drills these pusher legs are paired with, because compatibility is what makes the whole system work.

The G250 jackleg drill is engineered for miners who need reliable performance in confined spaces and challenging orientations. Its motorcycle-style control feed and ergonomic backhead design reduce operator fatigue, and the large contact areas between major cylinder components reduce impact pressure — extending product life significantly. Paired with the GP755A pusher leg, it becomes a complete system that’s hard to beat for demanding underground conditions.

The G83F jackleg drill earned its reputation as a market favorite through consistent, dependable performance. It delivers a high penetration rate with an impact rate of 2256 BPM, runs at 86.36 l/s air consumption at 6 Bar, and its water-flushed design keeps the working environment cleaner and safer. With the GP7 pusher leg attached, operators get a complete drilling system that’s versatile enough to handle sinker and jackleg applications alike.

The Productivity Equation

When you combine the right jackleg drill with its matched pusher leg, the productivity gains are real and measurable. Operators spend less time fighting the equipment and more time drilling. Repositioning is faster. Fatigue builds more slowly over a shift. Maintenance intervals stretch further because the components are designed to work together rather than against each other.

At GME Drills, we supply these systems across North America and South America, and the feedback from both operators and mine managers consistently points to the same thing: matched equipment matters. The GP755A and GP7 pusher legs aren’t afterthoughts — they’re integral to how our jackleg drills perform in the field.

If your operation is running jackleg drills and you haven’t evaluated your pusher legs as part of the complete system, it’s worth taking a closer look. The right pusher leg won’t just support the drill — it’ll make your operators faster, safer, and less exhausted at the end of the day. That’s a productivity gain that shows up not just in drilling metrics, but in retention, morale, and long-term equipment costs.

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