Product category:
Drilling, boring and reaming
News Release from: Mikron Tool SA Agno | Subject: CrazyDrill Cool small carbide drills
Edited by the Manufacturingtalk Editorial
Team on 11 April 2005
Small carbide tools drill deeper, faster
A breakthrough in small solid carbide drill technology and development of the cutting process allows 1mm-4mm holes to be drilled up to 15 times diameter in depth at 20 times faster feeds.
Holes between 1mm and 4mm diameter can now be drilled up to 15 times the length to diameter ratio to very high accuracy with penetration rates of up to 20 times faster than normal applied feeds following a breakthrough in small solid carbide drill technology and development of the cutting process by Mikron Tool of Agno, Switzerland The CrazyDrill Cool, aptly named due to its almost unbelievable performance as a twist drill, combines the latest generation carbide, Mikron developed cutting edge technology, special coatings and a progressive helix grooving
This article was originally published on Manufacturingtalk on 23 Oct 2006 at 8.00am (UK)
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Small but powerful - drilling up to 15 x D
Expanded range of internally cooled small drills is capable of advancing 0.07mm/rev with a diameter of 0.8mm and length of 8mm in 100Cr6 alloy steel at a speed of 50m/min.
Drilling into aluminium at faster speeds and feeds
When machining small holes into aluminium a drill offers excellent chip removal, outstanding tool life, high productivity and at the same time 'brilliant surface quality'.
As a result, penetration of the workpiece is improved with through the tool coolant fed directly to the cutting zone which maximises chip removal and extends cutting tool life in a wide range of materials from non-ferrous to heat treated steel.
These high performance drills are available from stock between 1mm and 4mm diameter in increments of 0.05mm and lengths of 6XD, 10XD and 15XD (D = diameter).
For tools up to 2.5mm diameter, Mikron has been able to improve coolant flow to the cutting zone by up to 300%, even when applied at low pressure, by incorporating a 'power chamber' set into the tool shank.
Further reading
Profile milling cutters offer unifom quality
Profile milling cutters use logarithmic relief grinding to guarantee a uniform cut quality and identical profile even in case of multiple regrinding.
Drills designed for small holes and batch jobs
Swiss cutting tool manufacturer will be showing a very adaptable small hole drill range and a drills designed for carying out for machining small and medium batch quantities.
Small milling cutters have wide profile range
Small, profile milling cutters are offered in a wide range of cutting profiles including convex, concave, rounded or angled, straight or spirally toothed or even in complex profiles.
As a result, this copious supply of cutting fluid through the tool is ideal to cool and lubricate the tool and is especially successful when difficult to machine materials have to be processed.
The Mikron developed process, uses two stages of drilling that enables maximum productivity to be obtained.
Initially, a Mikron PilotDrill is used to position the hole centre and provide a 'start bush' or guide hole in the material to a depth equal to twice the diameter of the tool.
The same tool can also be used to chamfer or break the edge of the hole within cycle and also enables holes to be produced at an angle if required.
As a result, it creates a very accurate start position for the main drill preventing initial wander, helps stop any deviation from the target area and prevents tool breakage as the drill starts to engage in the cut.
Important in the overall performance of CrazyDrill Cool is the considerable reduction in the cycle time.
This is achieved due to its ability to drill up to 10 times the depth to diameter ratio in a single step before any peck stages have to be initiated in order to relieve the tool and break up the swarf.
In recent trials on 90 Mn CrV8 tool steel a 1.5mm hole was produced some 22.5mm deep.
The PilotDrill initially created a start hole 3mm deep that was followed by CrazyDrill Cool running at 10,600 rev/min and 0.10mm/rev feed rate that enabled the material to be penetrated at 1060mm/min.
During the cycle, which covered a drill depth of 22mm, the tool only had to be peck fed and redrawn four times.
There are three variants of CrazyDrill Cool - a short version for holes up to six times diameter to length ratio, one of medium length for holes up to 10:1 and a long series drill which enables holes up to 15:1 to be drilled.
Both coated and uncoated tools can be supplied according to materials to be machined and a regrinding service is available from Mikron for tools over 1.5 mm diameter.
Special customised tool dimensions can also be supplied under Mikron's 'Star Service' together with certification of conformance.
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