GVN Series

Single Axis Gun Drilling Machines

Precihole’s GVN Series Gun Drilling Machines are built to manufacture high precision parts. Machines incorporate the latest technology available for this process in the world. Machines are customized to suit volume requirements and provide excellent straightness, surface finish and bore tolerance. Length to diameter ratios of up to 125 are possible. These machines are complete solutions that include features needed for continuous and repeatable performance over many years.

Machine Features

Component Counter rotation to ensure excellent straightness
Use of ball screw and servo drives for linear motion
Multiple tool steadies to provide tube support
Rotating Cone or Self Centering chuck arrangement for part clamping
High pressure coolant and fine filtration system
Oil chilling and Automatic Lubrication
Mitsubishi / Siemens PLC controls with touch screen HMI
Integrated design to reduce overall machine foot print

Description	GVN08C	GVN12C	GVN20C	GVN25C	GVN40C
Drilling Diameter Range (mm)	Ø2 - Ø8	Ø3 - Ø12	Ø5 - Ø20	Ø8 - Ø25	Ø8 - Ø40
Spindles (Nos.)	1 / 2 / 4			1 / 2
Max. Drilling Depth (mm)	400 / 600 / 1000
Part OD Range (mm)	10 - 50		12 - 75		15 - 100
Part Clamping System	Hydraulic Cone Clamping / Chuck Clamping
Max. Component Weight (kg)	30		50		70
Counter Rotation Speed (rpm)	300		140
Drill Feed Range (mm/min)	0 - 1000
Rapid Traverse (mm/min)	1000		8000		4000
Power per Spindle (kW)	1.5	2.2	5.5	7.5	15
Spindle Speed (rpm)	2000 - 12000	1200 - 10000	600 - 6400	600 - 3300	350 - 3300
Coolant Tank Capacity (liters)	850 / 900 / 1100		1050 / 1100 / 1250		2000
Max. Coolant Pressure (bar)	120	100	80	60

Description	GVN08C	GVN12C	GVN20C	GVN25C	GVN40C
Drilling Diameter Range (in)	Ø0.08 - Ø0.3	Ø0.12 - Ø0.47	Ø0.197 - Ø01	Ø0.315 - Ø1	Ø0.31 - Ø1.57
Spindles (Nos.)	1 / 2 / 4			1 / 2
Max. Drilling Depth (in)	16 / 24 / 40
Part OD Range (in)	0.4 - 2		0.47 - 3		0.6 - 4
Part Clamping System	Hydraulic Cone Clamping / Chuck Clamping
Max. Component Weight (ibg)	67		111		155
Counter Rotation Speed (rpm)	300		140
Drill Feed Range (in/min)	0 - 40
Rapid Traverse (in/min)	393		315		157
Power per Spindle (hp)	2	3	7.5	10	20
Spindle Speed (rpm)	2000 - 12000	1200 - 10000	600 - 6400	600 - 3300	350 - 3300
Coolant Tank Capacity (gal)	225 / 238 / 290		277 / 290 / 330		530
Max. Coolant Pressure (psi)	1740	1450	1160	870

Description	GVN08C	GVN12C	GVN20C	GVN25C	GVN40C
Drilling Diameter Range (mm)	Ø2 - Ø8	Ø3 - Ø12	Ø5 - Ø20	Ø8 - Ø25	Ø8 - Ø40
Spindles (Nos.)	1 / 2 / 4			1 / 2
Max. Drilling Depth (mm)	400 / 600 / 1000
Part OD Range (mm)	10 - 50		12 - 75		15 - 100
Part Clamping System	Hydraulic Cone Clamping / Chuck Clamping
Max. Component Weight (kg)	30		50		70
Counter Rotation Speed (rpm)	300		140
Drill Feed Range (mm/min)	0 - 1000
Rapid Traverse (mm/min)	10000		8000		4000
Power per Spindle (kW)	1.5	2.2	5.5	7.5	15
Spindle Speed (rpm)	2000 - 12000	1200 - 10000	600 - 6400	600 - 3300	350 - 3300
Coolant Tank Capacity (liters)	850 / 900 / 1100		1050 / 1100 / 1250		2000
Max. Coolant Pressure (bar)	120	100	80	60

Description	GVN08C	GVN12C	GVN20C	GVN25C	GVN40C
Drilling Diameter Range (in)	Ø0.08 - Ø0.3	Ø0.12 - Ø0.47	Ø0.197 - Ø01	Ø0.315 - Ø1	Ø0.31 - Ø1.57
Spindles (Nos.)	1 / 2 / 4			1 / 2
Max. Drilling Depth (in)	16 / 24 / 40
Part OD Range (in)	0.4 - 2		0.47 - 3		0.6 - 4
Part Clamping System	Hydraulic Cone Clamping / Chuck Clamping
Max. Component Weight (ibg)	67		111		155
Counter Rotation Speed (rpm)	300		140
Drill Feed Range (in/min)	0 - 40
Rapid Traverse (in/min)	393		315		157
Power per Spindle (hp)	2	3	7.5	10	20
Spindle Speed (rpm)	2000 - 12000	1200 - 10000	600 - 6400	600 - 3300	350 - 3300
Coolant Tank Capacity (gal)	225 / 238 / 290		277 / 290 / 330		530
Max. Coolant Pressure (psi)	1740	1450	1160	870