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For technical reasons, the same type of drilling tool or equipment cannot be used for all drilling operations. Different drilling systems have been introduced to obtain the desired hole dimensions, hole quality, and economics.
Jarvie Engineering utilises Gun Drills and Single Tube System (STS) drills and Counterboring tooling as the key to producing holes in components that require hole depths or bores from 10x-drill diameter up to 100x-drill diameter.
Drilling normally occurs from one end of the work piece, to ensure high quality straight holes to a tolerance IT 10, and a smoothness of 10µm can normally be maintained.
GUN DRILLING
The Gun Drill employs an internal-type cutting fluid supply and external chip exit. The fluid is supplied at very high pressure through the channel to the cutting edge where it lubricates and cools the cutting edge and support pads.
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Gun Drills produce holes that conform to high levels of straightness, surface finish, and tolerance.
STS DRILLING
STS drills and Counterboring tools comprise of a drilling head fast threaded to a drill tube. The cutting fluid is pumped under high pressure between the external surface of the drill and the hole being drilled.
The cutting fluid, diverted at the drilling face, transports the chips, through the drill head and out through the tube.
Hole sizes can vary from 30mm to 150mm drilled from solid to 500mm diameter for counterboring in work pieces up to 6000mm in length and 10 tonne weight. Materials drilled include alloy steels, aluminium, stainless steels, and cast iron.
ENQUIRIES
Please direct all inquiries to the Works Manager and provide the following information:
• Required hole diameter
• Hole depth
• Hole tolerances
• Surface finish requirements
• Work piece dimensions and surface finish
• Number of components and batch size volume
• Component drawings when possible
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