Press Release
Ligna – 22-26 May 2017
Page 1
Dust-free drilling of wood and plastics
ADU gears from Grotefeld – outstanding drilling results
every time thanks to air feed-through
GROTEFELD GmbH
Eugen-Gerstenmaier-Str. 1
32339 Espelkamp
Germany
Fon: +49 5772/ 8071
Fax: +49 5772/ 8073
Email: [email protected]
www.grotefeld.com
The gears developed by Grotefeld (Germany) with air feedthrough coupled with drill bits featuring a central interior air
chamber mean that dust left behind or even swarf from
machining in the drilled holes are now a thing of the past. These
developments bear testimony to the leading position of the
Espelkamp-based expert in the field of power units and top-class
supplier when it comes to the innovation of high-precision,
sophisticated machining units.
The engineering company presented a new air drilling unit with air
feed-throughs and fixed spindles spaced from 30 mm apart at the last
Ligna show, and has constantly enhanced this unit for a variety of
applications, as the samples will demonstrate in impressive fashion at
the company stand D27 in hall 12 at this year’s event.
Trouble-free operations with excellent drilling results
The background concerns the minimisation of “drill dust in the drill
hole”, which represents a nuisance factor in terms of quality, time and
Press contact:
costs, by means of drill bits with a central interior air chamber (air
drills) to permanently blow dust from the drilled holes during the
drilling process.
First of all, the wood dust remaining in the drill hole until now has
been a disturbance in the drilling process itself: Frictional resistance,
stress caused to the tool or power unit, machine downtime, wear and
fraying are some of the critical parameters which Grotefeld confronts
with its optimal solutions.
Edelweisspress
Frank B. Müller
Goebenstraße 4-10
32052 Herford
Germany
Fon: +49 5221 126520
Fax: +49 5221 126565
Email:
[email protected]
www.edelweisspress.de
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Presseinfos: gfne1704
Press Release
Ligna – 22-26 May 2017
Page 2
The chipping residue or compacted dust which once remained in the
drill hole also frequently caused disruptions in operations during the
subsequent production flow. When wooden parts were turned over,
for instance, drill residue fell out at the “wrong” moment or pegs and
GROTEFELD GmbH
Eugen-Gerstenmaier-Str. 1
32339 Espelkamp
Germany
Fon: +49 5772/ 8071
Fax: +49 5772/ 8073
Email: [email protected]
www.grotefeld.com
plugs driven into the part protruded due to debris at the bottom of the
hole.
Compressed air right at the end of the drill bit
The development activities of Grotefeld in the field of power units start
with the accessing of compressed air at a central point, e.g. at the
main spindle. The air is then distributed in the ADU gears to the
individual spindles and finally the cleaning medium is blown through
the central axis of the drill bit to the tip. In doing so, chips, wood
debris or dust are blown out of the drill hole with compressed air at a
pressure of up to 6 bar, resulting in clean drill holes right down to the
bottom for all subsequent work processes.
The spindles in the new ADU gears – the acronym stands for “air drill
unit” – generally rotate to the right. The torque within the speed range
of 1,000 to 6,000 r.p.m. is 30.5 to 5.1 Nm. Spindle output is 3.2 kW.
The spindles are fitted with shaft receptacles with a diameter of 10H7
and lateral clamping screws for the air channel drill bits.
When it comes to the further developments in the run-up to this year’s
Ligna from 22nd to 26th May, Grotefeld will meet the exacting
standards it has set itself in providing excellent quality as well as
comprehensive service at an optimal price-performance ratio.
Premium power unit technology – development, production, sales and
customer care “all from a single source”!
Press contact:
Edelweisspress
Frank B. Müller
Goebenstraße 4-10
32052 Herford
Germany
Fon: +49 5221 126520
Fax: +49 5221 126565
Email:
[email protected]
www.edelweisspress.de
Download (content/pict.)
edelweisspress.de/
Presseinfos: gfne1704
Press Release
Ligna – 22-26 May 2017
Page 3
Photos (2)
GROTEFELD GmbH
Eugen-Gerstenmaier-Str. 1
32339 Espelkamp
Germany
Fon: +49 5772/ 8071
Fax: +49 5772/ 8073
Email: [email protected]
www.grotefeld.com
gfne1704_b1: The new ADU gears with air feed-through are built with
spindle distances from 30 mm. The maximum torque is 6,000 r.p.m.,
power consumption is 3.2 kW.
gfne1704_b2: Section of the ADU gears with a fitted drill bit with an
interior air chamber (air drills). Drill holes with debris or dust in the
furniture industry are now a thing of the past thanks to compressed
air which is accessed and passed through the drill at a pressure of 6
Press contact:
bar.
Edelweisspress
Frank B. Müller
Goebenstraße 4-10
32052 Herford
Germany
Fon: +49 5221 126520
Fax: +49 5221 126565
Email:
[email protected]
www.edelweisspress.de
Photos: Grotefeld GmbH
Download (content/pict.)
edelweisspress.de/
Presseinfos: gfne1704