Machines
Precihole’s complete line of deep hole drilling machines is designed to meet the needs of the modern machine shop now and for many years to come. These machines offer a wide range of features and capabilities making them versatile to suit a myriad of applications in various industries. The multi-axis and multi-spindle versions boost productivity many folds without compromising on accuracy and rigidity.
GDM Series
Micro Gun Drilling
This series is specially designed to meet all the requirements of very small hole drilling from Ø1 mm to Ø6 mm. Motorized spindles, high pressure coolant pumps as well as tool breakage monitoring systems are standard on this series. Many work holding options are also offered on these machines depending on application requirements.
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GVN Series
Single Axis Gun Drilling
This series is our most popular series and has 100s of applications in dozens of industries. This series covers drilling range from Ø2mm to Ø40 mm and lengths of parts up to 1500 mm. Machines are designed for 3 shift production mode and provide all the features for excellent output parameters like straightness, bore tolerance and surface finish.
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XYGVN Series
Three Axis Gun Drilling
These machines are designed for prismatic parts that need multiple holes on the face. The use of CNC controls to interpolate X, Y and Z axes movements gives precise location and repeatability for holes. Applications include cooling holes in mold plates, glass molds as well as long plates needing through holes in them.
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BVN Series
BTA Drilling
Precihole’s BVN series BTA deep hole drilling machines are well designed and robust to take heavy loads while drilling large holes. This series covers hole drilling from Ø20 mm to Ø250 mm solid and counter boring to Ø400 mm. Work piece lengths of 500mm to 10m can be accomodated on these machines. These machines are configurable with features depending on accuracy requirements and type of parts to be drilled.
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PMTC Series
Column Type Drilling
This series is specifically designed for large mold bases and tube sheets. Machines can be configured for gun drilling mode or BTA mode as per requirements. This series can incorporate 3 to 7 axes of CNC depending on features selected.
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FCVN Series
Facing & Centering
Facing, Chamfering and centering machines are specifically designed to accommodate high volume needs to face, center and chamfer cylindrical shafts at both ends in one setup. The tool plunges into the work piece ends and does all 3 operations in one shot. Cycle times are typically less than 30s. This machine is ideally suited for use in automotive industries.
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PRVN Series
Pull Reaming
Precihole’s pull reaming machine series combines high speed sizing of holes. Surface finish as well as consistency of holes across the length of the part is vastly improved after pull reaming.
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HHM Series
Horizontal Honing
Precihole Horizontal Honing Machines cover the requirements of honing the complete range from Ø20 mm to Ø160 mm. The maximum length of the component can be up to 10000 mm. The honing solution includes the machine as well as all the tooling and tooling accessories needed. The design of the machine is optimized to allow quick loading and unloading of component. Precision control of depth and diameter of the component are ensured by using PLC controls and servo drives.
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VHM Series
Vertical Honing
Precihole’s Vertical Honing Series is versatile and incorporates all the necessary features to produce excellent sizing and surface finish in a variety of parts in various industries. Precihole also provides all the fixturing and tooling needed for sizes ranging from Ø5 mm to Ø40 mm in this series.
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SBN Series
Skiving & Roller Burnishing
Precihole’s Skiving and Roller burnishing machine combines state-of-the-art features to offer a high speed high volume production of hydraulic cylinders. This technology is about 40 times faster than honing and results in excellent output parameters needed on hydraulic cylinder tubes.
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Special Purpose Machines
Multi Spindle Multi Axis
Precihole specializes in custom manufacturing deep hole drilling and hole finishes machines that are not covered in our standard series. With over 30 years of special machine design and development experience under its belt and a team of highly experienced concept and design engineers, Precihole prides itself to be one of the best SPM manufacturers in the industry.
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TGM Series
Gun Drill Regrinding
Precihole’s Gun drill regrinding machine provides users with a quick and accurate way to regrind their gun drills for multiple uses. The machine does not require skilled labor to operate and regrinds drills from Ø2 mm to Ø30 mm in one setting.
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BRVN Series
Button Rifling
Precihole Button Rifling Machines incorporate state of the art features to form precision grooves in small caliber gun barrels. The rifling button is pulled and rotated precisely through the barrel. The machine uses anti-backlash helical guides and rotary encoder to interpolate linear and rotary motions. This combination produces highly precise twists in the barrel. Rifling operation is extremely fast at 40-50 IPM pull feeds.
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CRVN Series
Cut Rifling
Precihole Cut Rifling Machines produce extremely accurate and precise barrels by cutting grooves using a single point cutting tool. Work piece is clamped rigidly in a self-centering vice. Servo controls ensure precision indexing and pulling to cut grooves. Cycle repeats till the intended depth of grooves is reached. Typically, depth of cut is programmed to be about 0.004 mm or 0.00015”. This rifling process can be used where very high precision and repeatability are required in the barrel for a weapon system like a sniper rifle or a match gun. This process is capable of rifling conventional grooves or 5R rifling grooves and can handle progressive or gain twists.
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BRM Series
Broach Rifling
Precihole is proud to be in a very small elite group of machine manufacturers in the world that can provide a broach rifling machine for medium and large caliber weapon systems. Broach rifling creates spiral grooves in the barrel using a hook cutter. The linear and rotary motion of the hook cutter are precision controlled for accuracy using a servo drive and ball screw or rack and pinion mechanism. The broach cutters are progressive in size and each cutter cuts a size slightly bigger than the previous one.
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FCVN Series
Facing & Chamfering Machine
Precihole provides a facing and chamfering machine for barrel rods to be end machined quickly and accurately. The quality of the face and chamfer on rods is critical to achieving good straightness on the subsequent gun drilling operation. The operation is done simultaneously on both ends with special tools. This eliminates the need for the rod to be inserted into chucks on a machining center and reversing it again to machine the other side. Cycle time is around 30s for facing and chamfering resulting in high volume production. Automation for loading and unloading barrels can be added. This includes use of a conveyor or robot.
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BSP Series
Straightening Press
Barrels need to be straightened during various stages of conversion between a rod to a finished barrel. Precihole provides a compact and precise solution for this operation. Barrel blank straightness is a critical factor that determines the final accuracy of the weapon system. Barrels are long and slender shafts that bend during heat treatment, machining or stress relieving. This press helps to correct the deflection by holding the barrel in a simply supported configuration and pressing the area with the bend in the opposite direction.
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LPVN Series
Lapping
Precihole Lapping Machines lap/polish the bores and grooves in the barrel after button rifling or cut rifling. This process helps improve the surface finish by getting rid of any burr or surface deformities like deep tool or chatter marks on the ID. This is the last process in barrel ID making before chambering and profiling. The machine is capable of handling cast lead or hard nylon brush tool during operation. Choice of using cast lead or hard nylon tool depends on the level of polishing needed on the barrel.
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