High Pressure Coolant
The K4000 Series
High Pressure Pump can transform your machine to give a deep hole drilling
capability equal to a purpose built Gun Drilling Machine.
Coolant is utilised from the machine’s existing coolant tank. To control coolant temperature the machine tool should have a tank capacity of at least 300 litres.
K4000 Pumps can cope with debris and swarf up to 500 microns. However, to prevent debris collecting or catching in the transfer pipes or drill coolant holes a magnetic strainer on the pump inlet is essential. For smaller drills and holes with fine surface finish requirements good quality filtration is a must. Suitably enclosed guarding is required to contain the high-pressure coolant.
For gun drilling operations, a soluble oil with high-pressure additives mixed to a 10%–15% solution or a good quality gundrilling type mineral oil should be used.
The maximum output of the K4000 pump is 26 litres/min at 70bar (1000psi).
The output from the pump can be controlled by a solenoid valve which diverts the coolant to the drill or back to the tank. This can be activated by the machine’s “M” codes.
If the machine does not have a suitable coolant capacity, we can supply the pump mounted vertically into a 300 litres Auxiliary Coolant Tank fitted with an integral float switch, sight glass, magnetic strainer and safety overflow. The float switch controls a free standing scavenge pump which in turn controls the fluid level in the auxiliary tank. The solenoid valve can also be mounted on this unit, giving the flexibility to being able to move the unit from machine to machine.
Spraymist
The K2000A and
K3000A
spray mist units can be quickly fitted to most machine tools to give a deep
hole drilling capability; they are portable and require only to be connected
to the factory compressed air supply. The Ventec drilling system works in
the following way. A 3:1 air driven pump situated inside the spraymist unit
pressurises a 10% solution of a special emulsion oil; the oil is atomised by
the compressed air at an adjustable sprayjet head and delivers the resulting
mist mixture into the toolholder and through the Ventec drill. At the
cutting face the mist mixture expands as it exits the hole in the carbide
tip producing a refrigerating effect. The heat from the cutting process
evaporates the water content of the mist leaving high lubricity oil to
lubricate the burnishing pads of the cutting tip. The compressed air ejects
the chips back along the drill flute and out of the hole.
The incoming air pressure should be 5,5–8,5 Bar (80-125psi). The coolant pressure should be set 3-5 Bar (45-75psi) above this pressure. The mist flow should be adjusted until a light mist is visible at the commencement of drilling. During the drilling cycle a trickle of fluid should just be noticeable returning along the drill shank and slightly wetting the face of the workpiece. To achieve optimum results the Ventec cutting oil mixing instructions must be followed exactly.
We also offer a range of standard and custom built Coolant Fed Toolholders (click here for more info) and a service to design and retrofit High Pressure coolant transfer systems to most CNC Lathes and Machining Centres.