The Complete Guide to Deep Hole Gun Drilling

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Deep hole gun drilling is a specialist machining process used to produce long, straight, and accurate internal holes where conventional drilling methods are not suitable. It is widely used in applications where depth, straightness, and internal consistency are critical to how a component performs.

LDC Engineering Ltd specialises in subcontract gun drilling and deep hole drilling, supporting customers who require precision drilling across a wide range of component sizes and materials.

What Is Deep Hole Gun Drilling?

Deep hole gun drilling is designed for applications where the depth of the hole is significantly greater than its diameter. The process allows for controlled drilling over long distances, helping to maintain alignment and consistency throughout the full length of the bore.

This method is commonly used for internal features such as heater holes, internal channels, and complex drilled paths that must meet strict dimensional requirements.

Gun Drilling and Deep Hole Drilling Capacity at LDC

A key factor in deep hole gun drilling is drilling capacity. LDC Engineering provides gun drilling up to 38mm diameter, with depths of up to 4 metres achievable on certain diameters. This allows for accurate drilling of long, narrow bores that require a high level of control.

In addition, LDC offers deep hole drilling up to 68mm diameter to a depth of 2 metres, supporting applications that require larger internal bores while still maintaining accuracy.

Together, these capabilities allow LDC to support a wide range of deep hole gun drilling requirements, from smaller precision holes to larger internal features.

Managing Accuracy and Consistency

Accuracy in deep hole gun drilling depends on controlled processes, specialist equipment, and experienced operators. Maintaining straightness and consistency over long depths is essential, particularly when drilled holes form part of a functional internal system.

LDC Engineering’s focus on subcontract gun drilling and deep hole drilling ensures that these processes are carried out with repeatability and care, supporting both one-off components and larger batch production runs.

Materials Commonly Used in Deep Hole Gun Drilling

Material behaviour plays a significant role in deep hole gun drilling performance. LDC Engineering machines a wide range of materials including duplex, stainless steel, mild steel, aluminium, copper, bronze, cast iron, cast steel, resin, nylon, and wood.

This material versatility allows deep hole gun drilling to be applied across many industries and applications, without the need to switch suppliers based on material type.

Supporting Machining Services

Deep hole gun drilling at LDC Engineering is supported by additional in-house machining services including CNC milling, turning, radial drilling, and surface grinding. Their surface grinder includes a large table size of 1500mm x 500mm x 350mm, supporting accurate finishing where required.

Having these services available alongside drilling helps ensure that drilled features remain accurate in relation to other machined surfaces.

Why LDC Engineering Is Suited to Deep Hole Gun Drilling

Deep hole gun drilling requires specialist capability, experience, and process control. LDC Engineering Ltd combines gun drilling and deep hole drilling capacity with material versatility and supporting machining services, making them well suited to complex drilling projects.

For businesses requiring reliable deep hole gun drilling carried out to a consistent standard, LDC Engineering provides a focused subcontract solution.

To discuss a deep hole gun drilling requirement, contact LDC Engineering Ltd.

 

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