Gun Drilling Machines

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Nationally famous technician teams are in our factory, who are good at design customized deep hole machines, heavy duty deep hole machines and high automatically deep hole machines.

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Gun drilling machine: Single axis gun drilling machine single spindle,double spindle,four spindle axis gun drilling machine Double axis,three axis,four axis,five axis,six axis Gun drilling machine drilling range:φ3mm-φ40mm Max drilling depth:2500mm Drilling accuracy: Hole diameter accuracy：IT8-IT10 Hole roughness accuracy-Ra6.3μm Hole deviation： 1.0mm/1000mm(workpiece fixed,Max workpiece length and diameter ratio 100：1) 0.5mm/1000mm(workpiece rotating，Max workpiece length and diameter ratio 100：1)

Advantages of Gun Drilling Machines

Cost Efficiency: Gundrills can be reground and re-tipped numerous times by specially trained machinists, offering a long service life that makes the method more cost-effective than conventional twist drilling. The feed rate is also extremely quick and efficient in comparison with traditional drilling.

Superb Drilling Quality: Whether you need shallow or deep holes, gundrilling can produce outstanding results quickly. Close tolerance holes can be made with excellent surface finishes, free from burrs, consistently over long lengths. Additional machining, such as reaming and honing, is not usually required.

Precise Cutting Performance: Compared to conventional drilling methods, gundrilling is consistently more accurate, delivering superior accuracy with minimum centreline deviation. Consequently, gundrilling makes it more possible to deliver to exact specifications for a range of projects and industries.

High Reliability: Because of the way in which they are formed and the use of a high-pressure coolant, swarf can be continuously removed from the cutting area, improving quality and repeatability, and reducing machining time (with the process up to six times faster than conventional twist drilling).

What Does A Gun Drilling Machines Do?

A gun drilling machine is a type of deep hole drilling machine that maximizes the performance of the drilling tool. Thus, it is possible for the machine to drill holes at great depths and with an extreme precision in any type of material, even those with a higher hardness.
This machine can drill at great depths, thanks to the high-pressure coolant system that always cleans the metal chips from the cutting tool.
Therefore, one of the major difficulties in using the gundrilling machine is, effectively, removing the metal chips, so that the cutting tool is not damaged. A tricky, but vital, process to create a perfect and accurate hole.
Our machines will allow you to:
• 60% reduction in drilling time
• 40% reduction of setup time
• 20% reduction in mold delivery time

The Key Features of Gun Drilling Machines

Single-Point Cutting Tool: Gun drilling uses a single-point cutting tool, typically a twist drill with a long, slender shank. The design of the tool allows it to remove material efficiently and maintain straightness even at significant depths.
High Pressure Coolant: These machines employ a high-pressure coolant delivery system to lubricate and flush chips away from the cutting area. The coolant also helps to reduce friction and heat generation, which improves tool life and hole quality.
Deep Reach: Gun drilling machines can create holes with depths much greater than their diameter, often reaching ratios of 10:1 or more.
Automatic Feed: To maintain consistent drilling speeds and prevent tool breakage, gun drilling machines typically feature automatic feed mechanisms that control the rate at which the drill advances into the workpiece.
Stability: Due to the length of the drill and the depth of the holes, gun drilling machines are engineered to minimize vibration and ensure stability during the drilling process.

Gun drilling is particularly advantageous for creating blind or through-holes in hard metals, such as stainless steel, alloy steels, and titanium alloys, where conventional drilling methods may not be effective or economical. It is also suitable for creating holes with small diameters where maintaining straightness and precision is crucial. The process can be performed on CNC (Computer Numerical Control) machines to achieve high repeatability and accuracy.

Gun Drill Process Description

A gun drill is a type of deep hole drill that specializes in cutting the required tolerances of hole roundness, straightness, size, finish, and concentricity in one pass. Though it can cut any size hole, the gun drill is especially desirable for very deep hole drilling, able to machine parts at up to a 300:1 depth-to-diameter ratio.
The gun drill was invented over 100 years ago to machine gun barrels. The basic innovation of forcing chips outward down a long fluted drill soon lent itself to many more operations than this, however. A gun drill produces consistent hole quality of whatever depth with a high degree of consistency, repeatability, and accuracy, while requiring minimal supervision.
A gun drilled piece does not require any secondary operations after its initial pass. Reaming, honing, deburring, and their associated time and energy costs are unnecessary. Constant flow of pressurized coolant not only flushes any chips directly into a chip box, resulting in a clear work area, but also cools the drilling area and increases tooling life. Overall, a gun drill provides: lower fixturing costs; increased productivity; quick, simple conversion from job to job; the ability to handle both production and job shop quantities; the ability to multiple load like parts; and the capability of regrinding drill heads much greater than standard twist drills.

Process Description: How does it work?
The primary purpose of a gun drill is to drill consistent holes in one pass. The machine work is therefore fairly simple. The entire machine consists of the gun drill itself, the machine, the coolant supply system, the workholding fixture, and the part handling equipment.
The gun drill is a long tool, generally with a detachable carbide tip at the end of a narrow shank and ending in a driver that connects to the workholder. Since the drill head is fairly flat the hole is usually begun with the aid of a bushing. After this point, the drill is essentially self-piloting. 8

There is a small hollow running down the entire length of the gundrill, as well as a fluted notch running along the side. As the drill rotates and cuts the metal, the coolant system pushes high-pressure coolant down the hollow pathway, forcing the chips back outward along the fluting and directly into the chip box.
The machine that controls this process may be either conventional, N/C, or CNC, and may feature multiple spindles or spindles with counter-rotation to the gundrill itself.

Part handling may involve an optional knee-bed system to aid in quick changeover.

Common Industries
Aerospace
Automotive
Defense
Hydraulics
Mining
Mold-making

Virtually any industry requiring the production of close tolerance holes may utilize a gundrill.
Common Processes:

Plastic molds
Tools & dies
Oil galley holes
Water lines
Heat exchanger tube sheets
Large steel and cast iron job shop parts

Why Use Gundrilling?

Let's take a look at the advantages of gun drilling over other CNC techniques. Why use this method as opposed to any other?
Gun drilling creates precise, accurate holes, using only a single pass.
It is ideal for sustaining precisely round holes and exactly straight drilled channels.
The guide pads and clearance faces of the drill reduce or eliminate the need for secondary finishing.
The drill channel is kept burr free.
Drilling can be carried out within high tolerance parameters to exact specifications.
Gun drilling is faster and more cost-effective than other methods.

Deep Hole Drilling & Gundrilling for the Molding Industry

Deep hole drilling vs. Gundrilling

Deep hole drilling refers to the production of holes with a relatively large depth to diameter ratio. Normal drilling methods should only be used to create holes where the depth is less than five times the diameter. Comparatively, deep hole drilling is used in operations where a hole needs to be anywhere from 10 to 150 times deeper than its diameter.
There are numerous types of deep hole drilling that can utilize rotating workpieces, tools, or both in the same process. Gundrilling is one such type of deep hole drilling. In single flute gundrilling, coolant is fed through a hole in the tool before exiting the flute as the hole is drilled. This coolant also provides lubrication to the drill periphery.

Benefits of gundrilling for molding

Gun drilling is often used in the production of injection molds, most commonly for drilling cooling lines or heater holes. Gun drilling is also used in the die-making process. While the process has become synonymous with drilling where greater depth is required, it also finds use in shallower applications, since a gun-drilled hole requires less finishing than other drilling methods.
Gun drills are typically used to produce holes between .25"and 2.36"; the major benefit of gundrilling is that it is capable of achieving these depths without losing accuracy in diameter or straightness. Gun drilling also naturally allows for high feed rates, which can reduce costs and lead times. For these reasons, gundrilling provides major benefits to those working within the molding industry.

Understanding Deep-Hole Drilling Machines and Their Applications

A deep hole drilling machine is known as a metal-cutting tool that is designed to produce very deep, precise holes into virtually any metal. Deep hole drilling machines are used for specific tools such as BTA and gun drills, which help manufacturers optimise the drilling procedure. For example, a deep-hole gun drilling machine maintains the accuracy of depth ratio in extreme cases. It is a rotary drill with a diameter of up to 100 inches (254 cm). It uses a rotating bit to drill through the earth.

Types of deep-hole drilling machines
There are many different types of deep-hole drilling machines on the market today. Each has its own advantages and disadvantages. Here is a brief explanation of the most common types:

Conventional rotary drilling machines: Conventional rotary drilling machines are the most common type of drilling machine. They use a drill bit that revolves around a central shaft. This type of machine is good for shallow drilling because it can generate a lot of torque and is easy to operate. However, conventional rotary drilling machines are not very good at drilling through hard rocks. They also demand a great amount of maintenance, which can be expensive

Drill bits with spinning motors: Drill bits with spinning motors are similar to conventional rotary drilling machines, but they use a motor to spin the drill bit instead of a revolving drill shaft. This type of machine is good for deep drilling because it can generate more torque and is less prone to jamming. However, drill bits with spinning motors are not as efficient as traditional rotary drilling machines when it comes to shallow drilling. They also require more maintenance than conventional rotary drilling machines.

Long-Hole Drilling Machines: With the long-hole drilling technique, mining companies can drill deeper holes in ore. This is referred to as production drilling and is done for a typical depth of 10 metres up to 40 metres in extreme cases.

Applications of deep-hole drilling machines
Deep-hole drilling machines are versatile tools that can be used for a variety of applications. They can be used for construction, mining, oil and gas extraction, and more.

One common use for deep-hole drilling machines is construction. They are used in conjunction with other construction tools, like hammers, saws, and chisels. By using a deep-hole drilling machine, workers can make precise cuts without having to go through the hassle of hand-sawing or chiselling.

Deep-hole drilling equipment is also commonly used in mining. This is because they are able to drill down into the earth much faster than traditional mining methods, allowing miners to extract more resources in less time. Additionally, deep-hole drilling machines are often used to extract oil and gas. This is because they are able to penetrate deep into the earth, where these resources are typically located.

Overall, deep-hole drilling machines use deep-hole boring tools and various other versatile tools that can be used for various applications. Their versatility makes them useful in a variety of settings, which is why they are so popular.

Deep Hole Drilling: Gun Drilling and Machining Services Explained

Deep hole drilling (DHD) is a stress measurement technique used in engineering materials and components to measure locked-in and applied stresses. The process measures residual stresses at a microscopic level with penetration of over 750 millimeters (30 in), without destroying the original component.
Advances in engineering technology have given common CNC machining centres gun drilling ability up to a certain depth-diameter ratio. Roundness and surface finish are among considerations. Common applications of deep hole drilling and machining processes include oil and gas exploration equipment, aerospace equipment, armaments and engines.

Types of Deep Hole Drilling
There are three basic types of deep hole drilling categorised by how the cutting coolant flushes heat and chips from the surface.

Gun drilling
The cutting tool is a fluted solid rod with a bored hole in the center where the coolant is injected through a hole in the middle. From there it flows back outside, through the flute and brings the chips with it.

Single Tube System (BTA / STS)
This is only for holes with a diameter of over 15.6 mm as the tubes have a minimum sizes. Coolant is pumped in around the outside of the cutting tool and pushes the chips out through the center tube.

Ejector System
This is only an acceptable technology for holes over 18.4 mm in diameter. The cutting tool is a tube within another tube where the coolant flows through the smaller one and onto the cutting face. From here the coolant and chips flow back through the larger tube.

How can help you with Deep Hole Drilling
We have years of Deep Hole Drilling experience working with a wide range of customers showing unrivaled workmanship and unmatched prices. Our highly skilled and knowledgeable staff deliver only the highest levels of accuracy for Deep Hole Drilling. This is essential in terms of hole position, diametrical tolerance, surface finish and straightness.
Deep hole drilling is offered as a stand-alone service or a complete manufacturing package which provides component processes for the required stage. Using our 10 deep hole drilling machines and related equipment, we have developed a full range of supporting processes. Our extensive range of Gun Drills, Ejector Drills and Counter Boring Heads allow for a number of capabilities, technical assistance and on-site drilling services.

Non-cylindrical components
Holes from 4mm to 320mm diameter in any position
Up to 2200mm centres depending on height and overhang
Cylindrical components
Holes from 4mm up to 320mm in diameter
Up to 6000mm in length
Site drilling services

A Brief Understanding Of Different Drilling Machines

Drilling and extraction are fundamental processes in the oil and gas industry. Drilling machines come in different shapes and sizes, each with specific features and benefits. A deep hole drilling machine is a type of machine used for drilling holes that are deeper than those that can be drilled by a standard drill bit.

Deep-hole drilling machines come in various designs, but they all share some essential parts and features. These include a drill bit, a chuck to hold the drill bit, a spindle to rotate the drill bit, and a feed mechanism to move the drill bit into the work-piece.

Standard Gun Drilling Machines
The most common kind of drilling machine is the gun drilling machine. Gun drilling machines use rotary hammers to create a hole in a rock or other material. They come in several sizes and speeds, but all share some common features.
First, all gun drilling machines have a rotating drill bit that sits at the top of a long barrel. The drill bit is attached to a motor that spins it quickly around the barrel. This movement creates a circular pattern of holes in the material.

Second, all gun drilling machines have an operator control panel at the front of the machine. This panel contains buttons to control the drill bit's speed and direction. It also has indicators showing how deep the drill bit is cutting into the material.
Finally, all gun drilling machines have a hammer that hits the drill bit repeatedly as it rotates. This action creates sparks that break down large pieces of rock into smaller ones. As a result, gun drilling machines are versatile tools that can be used for many different tasks, including mining and construction.

Micro Gun Drilling Machines
Micro gun drilling machines use a rotating drill bit similar to a gun. The drill bit moves up and down, making it easy to create small holes in a variety of materials. They come in various sizes and are used for a variety of applications, including the production of parts for products such as electronics and automobiles.

Universal Gun Drilling Machines
Universal drilling machines are a great choice for anyone looking to drill holes into a variety of materials. They are versatile, efficient, and can handle a wide range of drilling tasks.
Some of the most common Universal drilling machines have a quick change gear system that allows users to quickly switch between different drilling modes and variable speed control that lets users adjust the speed according to their needs. Additionally, these machines have power augers that help make hole formation more consistent and accurate.

BTA Drilling Machine
A BTA machine is a specific kind of deep-hole drilling machine crafted and developed to optimise the BTA and related tooling performance to make huge and deep holes in virtually any material. It is widely used worldwide, including in North America, South America, Africa, the Middle East and Asia. BTA drilling machines have the following advantages: high productivity, low cost and high reliability.

Skiving and Roller Burnishing Machines
Skiving machines create smooth surface edges by shaving off material with a sharp blade. Roller burnishing machines use rolls of pressure-sensitive paper to create a highly polished finish on surfaces. Both machines can use several materials, including metals, plastics, and composites.

Our factory

Dezhou Guanlu Precision Machinery Co.,Ltd is founded in 2011,its main business is manufacturing: Gun drilling machine,deep hole drilling machine,BTA deep hole drilling machine,deep hole skiving burnishing machines,deep hole honing machines and toolings.Our factory had about 50 workers,10technical engineers,15000square meters workshop.

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FAQ

Q: What is the difference between gun drilling and BTA drilling?

A: BTA Drilling vs Gun Drilling
BTA drilling machines introduce coolant around the tool head, and evacuate chips through the drill and machine spindle, compared to gundrilling, where coolant is introduced internally and chips exit through an external groove.

Q: How accurate is gun drilling?

A: How accurate is a gun drill? . 0005"/inch or better straightness is common with an accurate set-up and proper operating conditions. Best accuracy is achieved with counter rotating work and drill.

Q: What are the basics of gun drilling?

A: The basic principle behind gun drilling is the use of a long and thin tool, known as a gun drill, which is rotated at high speeds to produce the hole. The gun drill is guided by a tool holder, which keeps it centered and on the correct path as it cuts through the material.

Q: How do I choose a good drill machine?

A: If you wish to drill large-diameter holes in masonry, select a corded drill with a low speed gear. If you envisage drilling into a variety of materials - such as wood, plastic or metal - you should choose a drill with a multiple-speed feature.

Q: What should the coolant pressure be on a gun drill?

A: Typical recommendations are anywhere from 1,500 PSI for holes below 0.15" diameter to 500 PSI. One other factor to be aware of is that as your drill diameter increases so do the flow requirements, so make sure that your coolant pump can handle the load and will not starve your tool of vital coolant.

Q: What size drill is most useful?

A: The most popular is a 3/8-inch diameter drill. A 1/4-inch diameter features a lightweight design and is generally one of the best drills for home use by style. A heavy-duty capacity drill is usually a 1/2-inch diameter.

Q: Would speed or torque be better for drilling?

A: When driving screws in the harder the material the lower speed and more torque you're likely to need. Getting these settings right helps you to control the depth of your drilling without causing any damage. When drilling holes the harder the material the higher the speed to get the best result.

Q: What makes a drill more powerful?

A: There are two values you'll need to keep an eye out for here: voltage and torque. The general rule of thumb is that a higher voltage means a more powerful drill. Most cordless drills today are 18V, although lower (7.2V) and higher (20V) options are available.

Q: What are the three types of drilling methods?

A: The main types of drilling systems include rotary drilling, percussion drilling, and rotary-percussion drilling. Rotary drilling involves a rotating drill bit, percussion drilling uses a hammering action, and rotary-percussion drilling combines both methods to penetrate various soil and rock conditions.

Q: What are the three types of drilling machines?

A: There are many different types or configurations of drilling machines, but most drilling machines will fall into four broad categories: upright sensitive, upright, radial, and special purpose.

Q: What is a deep hole drilling machine?

A: A deep hole drilling machine is a metal-cutting machine tool, designed to produce very deep, precision holes into virtually any metal. Deep hole drilling machines enable the performance of specific tools such as BTA and gundrills, to optimize the deep hole drilling process for manufacturers.

Q: What are the categories of drilling machines?

A: The capacity of the drilling machine is determined by the size of the largest workpiece on which the spindle can be centered. Drilling machines can be categorized into five major classes- upright, radials, horizontals, turret drills, and multiple-spindle machines.

Q: What are the four main types of drilling?

Q: Which types of drills are known as deep hole drills?

A: Deep hole drilling is the process of machining holes with a depth to diameter ratio of greater than 10:1. Below, we'll explain 5 deep hole drilling tools and technologies: gundrilling, BTA drilling, ejector drilling, bottle boring tooling and counter boring tooling.

Q: What are the different types of deep drilling?

A: Deep hole drilling methods
Single-lip deep hole drilling. Principle of single-lip deep hole drilling. ...
BTA deep hole drilling. Principle of the BTA deep hole drilling method. ...
Ejector deep hole drilling. Process principle for ejector deep hole drilling.

Q: What are the methods of deep hole drilling?

A: Deep hole drilling
The classic deep hole drilling processes are single-lip drilling, STS drilling and ejector drilling. These processes are all based on an asymmetrical tool design and differ predominantly in the supply of cooling lubricant and in the removal of the mixture of cooling lubricant and chips (swarf).

Q: What is the most common drilling machine?

A: The most commonly used drilling machine is a single-spindle, floor-mounted, belt-driven machine for non-production drilling. Belt-driven spindles may require manual belt shifting for spindle speed changes. Feed rates are also adjustable and may be manual or automatic.

Q: Which type of drilling machine does a carpenter use?

A: As per the name, a breast drill essentially has a chest plate at the end for extra support and pressure while drilling. With this, you can drill into comparatively harder surfaces when compared to a hand drill. Breast drilling machines are used in carpentry.

Q: What are the two most common types of drilling method?

A: Two Primary Drilling Techniques: Percussive Drilling and Rotary Drilling. Drilling is a cutting operation which uses a drill bit to cut a hole of a circular cross-section in a solid material. It is helpful in drilling water wells, oil wells, and natural gas extraction wells.

Q: What are the six 6 operations that are commonly performed on drilling machines?

A: The operations that are commonly performed on drilling machines are drilling, reaming, lapping, boring, counter-boring, counter-sinking, Spot facing, and tapping. This is the operation of making a circular hole by removing a volume of metal from the job by a rotating, cutting tool called drill.

As one of the leading gun drilling machines manufacturers and suppliers in China, we warmly welcome you to wholesale cheap gun drilling machines for sale here from our factory. All customized products are with high quality and competitive price.