BTA Deep Hole Drilling Machine

BTA refers to Boring and Trepanning Association which is also mentioned to as STS (single tube system) drilling, as it utilises one single drill tube for the BTA tool, compared to other processes such as ejector drilling, which use two. A BTA Deep Hole Drilling Machine is a metal-cutting machine tool, functionally designed to create deep, precision holes into almost any metal. It allows the performance of specific tools such as BTA and gun drills, to improve the deep hole drilling process for manufacturers. Machines are designed and constructed to fit in the technology utilised by these tools, and improve all aspects of the process, to drill deep holes with reliability, accuracy and efficiency.

BTA Deep Hole Drilling Machines are perfect for a number of sizes of deep holes and production levels, and are essential for holes that are about 20:1 depth-to-diameter or greater in ratio. These machines provide the tooling support, coolant delivery, and process feedback that let manufacturers attain their deep hole drilling goals. These properties improve the process and prioritize deep hole drilling methods, by stabilizing tooling, reducing cycle time, evacuating chips, and avoiding tool breakage and process failures.

Trepanning Operation in BTA Machine is a technique utilised for drilling bigger hole diameters where machine power is restricted as it is not as power intensive as conventional drilling where the full hole is converted into chips. In this operation, the trepanning tool does not machine the whole diameter, only a ring at the periphery.

The BTA-System is a deep hole drilling system for distinct BTA Deep Hole Drilling Machines with an exterior coolant supply and an internal chip removal (single tube system). It is necessary for bringing the coolant to the work piece and for sealing off the process on work piece and boring bar, requires the BTA-System a pressure head (BOZA). This BTA-System is utilised for bore hole diameters between 76 mm and 700 mm and allows hole depths over 100 x D. As from dia. 18 mm the tools mostly become indexable cutting inserts and guide pads.

BTA Deep Hole Drilling Machine works on the principle of deep hole drilling processes which works by using distinct tools and setups to provide high pressure coolant, vacate chips cleanly, and accomplish depth-to-diameter holes into metal beyond what a common CNC machine can reach and perform.

BTA stands for Boring and Trepanning Association established for deep hole drilling systems. BTA Drilling comprises a single drill tube in which high pressure coolant is provided to the drill through the annular area between the drilled hole and the tube outer diameter. The drill head is fastened to a drill tube which is far sturdier compared to the kidney shaped shank of a gun drill, hence much higher metal removal rates are possible. The chips are displaced or evacuated through the I.D. of the tube. Pressure head is used which is essentially a high-pressure seal between the workpiece and the drill bush. BTA/STS drilling is normally used for hole sizes ф19 and above. For bigger diameter deep hole drilling, BTA drilling is the only existing option which delivers high output and precision. Since the chip removal is internal, no v shaped groove is essential in the shank, so its cross-section is entirely round and this delivers more rigidity to the whole system. BTA drilling is used in Industries like automotive, oil and gas, aerospace, power generation, energy, transmission, defence, marine, paper etc.

Features of BTA BORE Deep Hole Boring Machine:

• Easy detection of tool breakage and wear out.
• Easy arrangement that can go up from one spindle to four spindles dependent on production capacity needs.
• Customized machine available for line production requirements and tool room requirement.
• Robust design to permit precise and vibration free movement of machine elements.
• Superior pressure head design to allow optimum oil flow and tool guiding.
• Vibration dampeners absorb vibrations and diminish tube whipping to improve hole straightness.
• Oil chilling and automatic lubrication with high pressure coolant and fine filtration system.
• Fanuc / Siemens CNC controls with customized screens for monitoring machine parameters
• Facility for addition for other processes like trepanning, counter boring, skiving, pull boring and roller

burnishing, bottle boring on the same machine.

Solid drilling: For the jobs of solid bars, we can get a hole by solid drilling. It has a range of hole dimensions from 20mm to 150mm diameter depending on models.

Pull boring: Used for getting accurate results and less deviation tolerance for a hollow pipe.

Counter boring: Used for the jobs of expansion of hollow tubes. According to requirements, we have single inserts boring heads, double inserts boring heads and three inserts, of which the cutting volume is different.

Burnishing: Uses the rollers to press the inner surface of the tubes to get a harder and improved roughness of the inner hole.

Trepanning: Used for requirements of bigger size holes, normally bigger than 100mm. It is more economical and greatly benefits if the materials are expensive.

Numerous components are present on typical BTA drilling machines, regardless of configuration.

Pressure Head: Seals around the BTA tool and drill guide bushing, inletting the coolant around the outside of the tool, and for chip clearing throughout the drilling process.

Drill Guide Bushing: For contacting the workpiece to guide the BTA tool for drill preparation. Allows the tool to start in the correct location, and with the correct hole diameter, both important for accurate deep hole drilling. Also works to seal against the workpiece to comprise the coolant during the drilling process.

Drilling Spindle: Transmits the power and torque from the motor, to the tool. Also, chips and coolant are evacuated through a hole in the centre of the spindle during operation.

Vibration Dampeners: Supports long drills under the speed of rotation while transmitting torque, stabilizing the tool for an accurate drilling process. Equipped with rotating bearings and inserts that contact the tool to deliver the vibration dampening benefits. Lengthier travel machines may have numerous traveling vibration dampeners, while shorter machines may not require any.

Coolant Temperature Control: The drilling headstock and coolant pumping system produce heat having a negative effect on drilling factors such as tool life and accuracy. Hence, it is utilized to manage the heat and to maintain cutting fluid at the proper temperature.

Coolant System: The dependability and efficient performance of the BTA deep hole drilling process depends deeply on the machine coolant system. Low-micron coolant filtration, and filter condition feedback avert the build-up of chips and small particles, leading to less down time, lengthier tool life, and better surface finishes.

Applications of BTA Deep Hole Drilling Machine:

Oil and gas industry: BTA Deep Hole Drilling Machines is the ideal equipment for the oilfield industry used for drill pipes, drill collars, and submersible pumps,  

It is the most cost-effective way done by using a trepanning process as we could get core and also saving electricity. For longer drill collars, rack and pinion structure can be used, instead of ball screws, which will slag under the earth's gravity.

Paper machinery industry: BTA Machine can be used to work on the rolling calendars. BTA Machines have high tolerance accuracy required in rolling calendars, metallurgical roll, corrugated rod of paper machinery industry.

Oil Pump Nozzle Industry: BTA Machine can be used to work on Needle Valve Body, Injection Gas, Plunger Sleeve and Other Parts.

Automobile industry: BTA Machine can be used to work on head, crankshaft, cylinder block (internal combustion engine), steering gear rack, gear shaft and valve core. 

Hydraulic and Pneumatic cylinders: BTA Machine is suitable for hydraulic cylinders tubes as they require precision dimensional accuracy and finest inner surface roughness. BTA Machine is reliable and stable for applications in the hydraulic cylinder industry.

Moulds industry: BTA Machine is suitable for moulds industry and can be used to work on the thimble hole, water hole of moulds, runner hole, guide post hole and bottle mould hole. 

Extruder barrel industry: BTA Machine is best suited for the extruder barrel as it needs deep hole drilling to solid drilling and honing the inside hole.

Military industry: BTA Machine is suitable for gun barrels as its accuracy is excellent and can be used to work on anti missile launch tube, test torpedo launch tube, high-speed oil cylinder, re-entry machine parts, etc.

Coal industry: BTA Machine is utilised to drill hydraulic brackets in major big coal industry companies.

BTA Drilling Process: BTA drills utilise exterior coolant and internal chip exhaust to drill bigger diameter holes at a faster feed rate. Common Hole diameters are between 20 - 630 [0.80 - 24.8 in].

Ejector Drilling Process: Ejector drilling is a dual-tube substitute to BTA drilling in restricted applications. Typical ejector drills range from 20 - 200 mm [0.08 - 7.87 in] in diameter.

Trepanning Process: Trepanning drills a hole into a solid bar, leaving a solid core in the middle, and allowing bigger holes to be drilled with the same comparative power.

Pull Boring Process: Pull counter boring widens an existing hole as it is pulled back through the workpiece on a tensioned boring bar for maximum straightness.

Counter boring Process: Counter boring is utilised to widen existing holes, and can pilot off of either the finished bore for straightness, or pre-bore for concentricity.

Bottle Boring Process: Bottle boring uses actuators which outspread and retract within the hole to create an internal profile, regularly in aerospace landing gear applications.

Skiving and Burnishing Process: Skiving and roller burnishing is a two-process, one-pass finishing operation utilised to attain surface finish requirements in applications such as hydraulic cylinders.

Gun drilling Process: Gun drilling is characterized by hole diameters between 1 - 50 mm [0.04 - 2.00 in and uses internal coolant and exterior chip exhaust to handle deep holes with precision.

Rifling Process: Rifling is executed on a servo-controlled machine for precision rifle grooves in a barrel blank.

Bottom Forming Process: Bottom forming finishes off the base of a hole using specialized form tools. Bottom forming profiles comprises of radius, step, or flat bottom.

Reaming Process: Reaming is part of the rifle barrel blank manufacturing procedure, following gun drilling, and prior to rifling, for roundness and surface finish.

Milling and Machining Process: Milling and machining complements deep hole drilling abilities for improved profitability and throughput on select machines.

There are numerous factors affecting the BTA Deep Hole Drilling Machine price as it depends on the size or capacity of the machine. The price of the BTA Deep Hole Drilling Machine product is between INR 100 Lakh / Unit – INR 150 Lakh / Unit during Sep '21 - Aug '22. These are indicative prices based on numerous product prices.

Automotive	Oil and gas	Aerospace	Power generation	Energy
Transmission	Construction	Defence	Marine	Paper