Capabilities / Gun Drilling
Deep-hole drilling, done properly
Gun drilling is our founding specialism — deep, straight, high-accuracy holes that general machine shops outsource. We run it in-house on dedicated machines, and have done since 1983.
What is gun drilling?
The right process for deep, precise holes
Gun drilling — also called deep-hole drilling — uses a long, single-flute tool and high-pressure through-tool coolant to bore holes with a high depth-to-diameter ratio while holding tight tolerances on straightness and position.
It's the process of choice when a hole is too deep, too straight or too accurate for conventional drilling. We quote and manufacture from your STEP, IGES or 2D drawing, and friendly advice is always available if you want to talk an application through.
Depth without drift
Gun drilling keeps holes straight and on-centre to depths that a standard twist drill simply can't hold.
A superior bore finish
Single-flute tooling and through-tool coolant leave a clean, accurate bore — often with no secondary operation needed.
Dedicated machines
We run gun drilling on purpose-built machines, not adapted mills — so it's faster, more repeatable and in-house.
Our gun-drilling plant
The machines behind the holes
TBT Gundrill Block Machine
Dedicated deep-hole gun-drilling
Mollart Twin Spindle
Twin-spindle gun drilling
Mollart Single Spindle
Single-spindle gun drilling
Capacity (maximum depth, diameter and materials) confirmed on enquiry — send your drawing and we'll advise.
Start a project
Got a deep-hole job?
Send your drawing and we'll quote it — or call to talk it through with an experienced engineer.