504,214 active members
4,584 visitors online
Register for free
Login Register
MADRA-EDM - Banner
MADRA-EDM Products
MADRA-EDM GmbH
Start-hole electric discharge machine
BT-E - EDM machines
460 x 210 mm
325 mm
210 mm
350 mm
400 mm
20 Liter
200 kg
240 mm
600 kg
460 x 210 mm
325 mm
210 mm
350 mm
400 mm
20 litre
200 kg
240 mm
600 kg
Your low cost entry to the “Bohrteufel”-World.
Product details Homepage Product request
BT-1210 ATC - EDM drilling with gantry machine
BT-1210 ATC - EDM drilling with gantry machine
Start-hole electric discharge machine
MADRA-EDM GmbH
Start-hole electric discharge machine
1350 x 1150 mm
1100 mm
1200 mm
1000 mm
600 mm
1000 mm
2500 kg
30 Stationen
1350 x 1150 mm
1100 mm
1200 mm
1000 mm
600 mm
1000 mm
2500 kg
30 station

With the machine BT-1210 ATC the product range of Madra-EDM has been extended by a special feature. Because of the gantry design, the machine is particularly suitable for heavy work pieces up to 2.5 t. The working space is optionally equipped with a splash guard or with a complete housing. The work pieces can be easily lifted on the work table by a crane or forklift. The working space is accessible from the top and the front. In the version with splash guard the machine is even accessible from 3 sides.

The machine can be equipped with an automatic 30-fold electrode changer as well as a 4-fold guide changer. A process-safe changing of electrodes, starting with diameter 0.5 mm, is guaranteed.

The stainless-steel working space with a table surface of 1350 x 1150 mm enables machining of work pieces up to 1000 mm height and a weight up to 2.5 t. Travel in X 1100 mm, Y 1200 mm and Z 600 mm, as well as the programmable W-axis with 1000 mm are a special feature.

The big, separate filter unit TFA-200-1 with a tank volume of 200 l guarantees clean working fluid. As an option, equipment with an external cooling unit and adjustable thermostat is available to ensure constant temperature of the working medium. Pure deionized water or EDM drilling additive WITOL BT can be used as working medium. WITOL BT guarantees a stable work process with low electrode wear, faster EDM drilling time and prevents rust formation on the work piece because of integrated corrosion protection. An antifungal agent prevents medium to tip over. This is very important when machining deep as well as very fine holes.

A wide range of application is possible because of the use of electrodes with diameter 0.2 to 4 mm and a length of up to 400 mm with the automatic electrode changer, (manually up to 700 mm). Optionally, together with a booster, electrodes with a diameter of up to 8 mm can be used.

The entire technology of the required EDM parameter is stored in the CNC control system and can be freely selected and programmed. These can be called up via the editing program. Many subprograms facilitate programming for the machining tasks as well as alignment of work pieces.

The CNC path control is designed to control up to 8 axes. This makes it possible to attach a separate indexing device, rotary table or tilt- and swivel table, which can be used to solve special machining tasks. As a further option, a swiveling eroding axis is available.

The field of application for the EDM drilling machine „Bohrteufel“ MADRA BT-1210 ATC is insertion of drill holes into work pieces made of electrically conductive materials such as steel, aluminum, copper and carbide. However, for carbide only with optional C-box in general tool making industry, as well as for special machining tasks on turbine blades, rims, round bearings and so on.

Besides of the EDM drilling machine type BT-1210 ATC, the series range „Bohrteufel“ of MADRA-EDM offers the appropriate machine concept for each...www.madra-edm.de/news
Product details Homepage Product request
How to machine small holes?
How to machine small holes?
Start-hole electric discharge machine
MADRA-EDM GmbH
Start-hole electric discharge machine
How to machine small holes?
Drilling of small holes is a difficult task and has only been possible with mechanical machining for a long time. For the watch industry, a solution could be found by producing special, own mechanical tools. These tools are still not generally available today.
It has been shown that the spark erosive processing provides an excellent solution for this problem. When the machine tool manufacturer MATRA-Werke GmbH in Frankfurt presented an EDM drilling machine in 1986, the experts were astonished. At a first performance of the machine in Frankfurt, the exclamation “it drills like a devil” was made. Thus, the brand name “Bohrteufel” (drill devil) was born, which stands for EDM drilling process since then.
With this method, drill holes of 0.2 to 6.0 mm with a drilling depth of up to 600 mm can be produced in all electrically conductive materials very fast. The drilling speed into hardened tool steel (e.g. 20 mm high) with a tube electrode of 0.8 mm diameter is about 1 sec./mm. The drill tolerances are a few hundredths of a millimeter depending on the machining task. Due to the contact-free operation of the electrode on the work piece, a drill hole can also be inserted without any problems into slanted surfaces.
The choice of the electrode and the working fluid is important for a high-quality machining with the ”Bohrteufel”. The technology of the machine is precisely coordinated with the work equipment.
Until now a whole series of high-tech machines has been developed from the “Bohrteufel”, which was presented more than 20 years ago. In 2005, MADRA-EDM company took over all the rights of the “Bohrteufel”-series and the machines have been subject to constant enhancement since then.
In addition to the machine series of the BT-type in manual or CNC-version, also special requests of the users are fulfilled. The machines are used wherever small holes with a large drilling depth are required into high tensile and/or tough materials, e.g. carbide, titanium, non-ferrous metals, graphite, etc. The fields of application are generally tool making, for start hole drilling for wire erosion or also for bleeder holes.
The machines are also used for production tasks in aerospace, medical technology, electrical engineering, automotive production and for cutting tools. Due to continuous technological development and adaptation to special machining tasks, the application areas are constantly expanding.
Product details Homepage Product request