Update quantity
Please note, the order volume has been updated. This is due to package and minimum order quantities.
Please note, the order volume has been updated to. This is due to package and minimum order quantities.
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Read the operating instructions before use. |
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Instructions for use and other useful information |
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Dealing with recyclable materials |
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Do not dispose of electric equipment and batteries as household waste |
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These numbers refer to the corresponding illustrations found at the beginning of these operating instructions |
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The numbering reflects the sequence of operations shown in the illustrations and may deviate from the steps described in the text |
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Item reference numbers are used in the overview illustrations and refer to the numbers used in the product overview section |
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This symbol is intended to draw special attention to certain points when handling the product. |
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Wear eye protection |
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Wear a hard hat |
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Wear ear protection |
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Wear protective gloves |
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Wear protective footwear |
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Wear light respiratory protection |
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Analysis data |
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Hole-starting mode |
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Rated speed under no load |
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Alternating current |
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Diameter |
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Do not transport by crane |
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Bluetooth |
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Locking mechanism opened |
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Locking mechanism closed |
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The product supports wireless data transmission compatible with iOS and Android platforms. |
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Protective ground |
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If applied on the product, the product has been certified by this certification body for the US and Canadian markets according to the applicable standards. |
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On the vacuum base plate Upper half of the image : An additional means of securing the drill stand must be employed when the machine is used for horizontal drilling with the vacuum securing method. Lower half of the image : Use of the vacuum securing method without an additional means of securing is prohibited for drilling in an upward direction. |
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On the diamond core drilling machine Use of the water collection system in conjunction with a wet-type industrial vacuum extractor is a mandatory requirement for working overhead. |
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On the diamond core drilling machine Operate the system only with a fully functional PRCD. |
Diamond core drilling machine |
DD 250-CA |
Generation |
01 |
Serial no. |
The product described is an electrically powered diamond core drilling machine. It is designed for the rig-based wet drilling of through-holes and blind holes in (reinforced) mineral materials. Hand-held use of the diamond core drilling machine is not permitted.
Always use a drill stand when using the diamond core drilling machine. The drill stand must be sufficiently anchored in the base material by an anchor base plate or vacuum base plate.
Do not use a hammer or other heavy object to adjustment the base plate.
Operate the tool only when it is connected to a power source providing a voltage and frequency in compliance with the information stated on the rating plate.
Comply with the safety rules and operating instructions for the accessories used.
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The start screen is displayed when the diamond core drilling machine is supplied with power. The Bluetooth status, the personalized name and the serial number of the diamond core drilling machine are shown on the start screen.
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The diamond core drilling machine is not switched on. The display helps you to level the system and to align the drill stand when drilling at an angle. The display shows the alignment of the diamond core drilling machine symbolically and in degrees.
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The diamond core drilling machine is running under no load. The display helps ensure that the gear engaged is suitable for the diamond core bit used. At top left, the display shows the gear engaged and in the center, the recommended core bit diameter range in millimeters and inches for this gear. |
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The diamond core drilling machine is switched off or running under no load. This function makes it possible to start holes with low vibration when using large-diameter core bits. This function can be deactivated at any time by pressing the button ![]()
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The diamond core drilling machine is drilling and the hole-starting mode is active. The display shows the time remaining until the diamond core drilling machine automatically switches off.
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Hole-starting mode has been deactivated. Speed and power of the diamond core drilling machine increase and drilling can proceed
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The diamond core drilling machine is drilling. The button for activating hole-starting mode was pressed while the diamond core drilling machine was under load or was in cool-down mode.
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The diamond core drilling machine is drilling and the hole-starting mode is not activated. The information displayed helps ensure that the diamond core drilling machine is being operated in the optimal range.
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The diamond core drilling machine is drilling and the hole-starting mode is not active. The information displayed helps ensure that the diamond core drilling machine is being operated in the optimal range.
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![]() Rated current limit has been exceeded |
The diamond core drilling machine is drilling and the hole-starting mode is not activated. Rated current has exceeded the limit of 20 A.
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The diamond core drilling machine is drilling and the hole-starting mode is not activated. The information displayed helps ensure that the diamond core drilling machine is being operated in the optimal range.
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The status bar displays various information regarding the machine’s current status, such as the gear engaged or the activated hole-starting mode. |
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The status bar displays various warnings regarding the tool's current status which do not result in the diamond core drilling machine stopping immediately. |
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Bluetooth is activated in the basic setting. To switch off the Bluetooth function, press and hold down the buttons ![]() ![]()
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Bluetooth is deactivated. The diamond core drilling machine cannot be connected to additional device or accessories. To switch on the Bluetooth function, press the buttons ![]() ![]()
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The diamond core drilling machine is ready to connect to another device or accessory. To start the process of establishing the connection, simultaneously press the ![]() ![]()
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An existing Bluetooth connected to a device or accessory has been interrupted. |
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The display shows drilling time (diamond core drilling machine actually drilling) at the top and operating hours (diamond core drilling machine switched on) at the bottom. Both figures are shown in hours, minutes and seconds. To reset drilling time and all other analysis data, press the ![]()
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This display shows contact pressure during drilling time as a percentage (%). This enables user behavior to be optimized.
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This display shows an evaluation of the drilling directions in %.
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This display shows an evaluation of the duration of use of the respective gear in %. The arrow always points to the gear with the highest rate of use.
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This reading shows use of the diamond core drilling machine in manual mode and with use of an AF-CA in %.
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This display provides an overview of all devices and accessories connected to the diamond core drilling machine.
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Start connection setup process at the diamond core drilling machine first and then at the device or accessory you want to connect. To start the process of establishing the connection, simultaneously press the ![]() ![]()
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The gear selector is in an intermediate position or is not correctly latched. Operate the gear selector until it latches completely. |
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Maximum running time with hole-starting mode active has been exceeded; Fault in the power supply; The diamond core drilling machine has been overloaded; Overheated, water has entered the motor or the cooling running time has ended. Switch of the power tool is in I position while connection to the power supply being established. |
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Undervoltage occurred in the supply network. In the event of undervoltage, the diamond core drilling machine cannot be operated at full power.
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The diamond core drilling machine has overheated and has switched off or is in the cooling mode. The indicator displays the time remaining until cooling down. If the diamond core drilling machine is still too hot after this time has elapsed, the remaining running time starts from the beginning again. |
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The motor of the diamond core drilling machine is running and the carbon brush wear limit has almost been reached. The indicator displays the time remaining until the carbon brushes need to be replaced. The time remaining until the diamond core drilling machine automatically switches off is displayed in hours and minutes.
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The carbon brushes are worn and have to be replaced. |
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The motor of the diamond core drilling machine is running. The carbon brushes have been changed and must be run in by letting the machine run under no load for at least 1 minute without interruption, in order to achieve the optimum service life.
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Item number |
Designation |
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51279 |
Hose connector |
2006843 |
Carbon brushes 220-240 V |
2104230 |
Carbon brushes 100-127 V |
DD 250-CA |
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Weight |
15.4 kg (34.0 lb) |
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Drilling depth without extension |
500 mm (19.7 in) |
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Permissible water supply pressure |
≤ 7 bar |
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Rated speed under no load |
1st gear |
240 /min |
2nd gear |
580 /min |
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3rd gear |
1,160 /min |
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4th gear |
2,220 /min |
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Optimum core bit diameter |
1st gear |
152 mm … 500 mm (6.0 in … 19.7 in) |
2nd gear |
82 mm … 152 mm (3.2 in … 6.0 in) |
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3rd gear |
35 mm … 82 mm (1.4 in … 3.2 in) |
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4th gear |
12 mm … 35 mm (0.5 in … 1.4 in) |
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Ideal distance of the mark on the anchor base plate from the hole center |
267 mm (10.5 in) |
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Ideal distance of the mark on the vacuum base plate from the hole center |
292 mm (11.5 in) |
DD 250-CA |
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Ø without accessories |
1/2 in … 12 in |
Ø with spacer |
1/2 in … 18 in |
Ø with water collection system and wet-type industrial vacuum cleaner |
1/2 in … 10 in |
DD-HD 30 |
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Weight |
21.4 kg (47.2 lb) |
DD 250-CA |
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Frequency band |
2,400 MHz … 2,483 MHz |
Maximum emitted transmission power |
10 dBm |
Ideal distance of the mark on the vacuum base plate from the hole center |
292 mm (11.5 in) |
Ideal distance of the mark on the combination base plate from the hole center |
292 mm (11.5 in) |
Malfunction |
Possible cause |
Action to be taken |
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Switch of the power tool is in I position while connection to the power supply being established. |
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The diamond core drilling machine has been overloaded |
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Maximum running time with hole-starting mode activated exceeded. |
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Water in the motor. |
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Supply network fault – the power supply has been interrupted. |
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The motor has overheated. The cooling down process is complete. |
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The motor has overheated. The diamond core drilling machine is running in cooling mode. |
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The carbon brush wear limit has almost been reached. The diamond core drilling machine will continue to run for a few hours until it shuts down automatically. |
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The carbon brushes have been changed and must be run in. |
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Diamond core drilling machine is drilling. |
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The motor has overheated. The diamond core drilling machine is running in cooling mode. |
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Supply network fault – undervoltage occurred. |
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The gear selector isn’t engaged. |
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Existing Bluetooth connection has been separated. |
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Bluetooth is deactivated. |
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Another diamond core drilling machine has automatically connected to the accessory used (e.g. water treatment system) via Bluetooth. |
Several diamond core drilling machines are connected to the same accessory. The accessory always connects automatically to the diamond core drilling machine that enables the connection to be established fastest. |
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The diamond core bit doesn’t rotate. |
The diamond core bit has become jammed in the base material. |
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The drilling speed is decreasing. |
Maximum drilling depth has been reached. |
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The core is stuck in the diamond core bit. |
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Wrong core bit specification for the base material. |
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High steel content (indicated by clear water containing metal cuttings). |
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The diamond core bit is defective. |
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Wrong gear selected. |
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Contact pressure is too low. |
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The machine has too little power. |
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The diamond core bit is polished. |
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The water flow rate is too high. |
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The water flow rate is too low. |
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The carriage lock is engaged. |
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Dust is hindering drilling progress. |
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The hand wheel can be turned without resistance. |
The shear pin is broken. |
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The diamond core bit can’t be fitted into the chuck. |
The core bit connection end or chuck is dirty or damaged. |
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Water escapes at the water swivel or gear housing. |
The water pressure is too high. |
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Water escapes from the chuck during operation. |
The diamond core bit isn’t securely tightened in the chuck. |
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The core bit connection end / chuck is dirty. |
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The seal at the chuck or at the connection end is defective. |
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No water is flowing. |
The water channel is blocked. |
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The drilling system has too much play. |
The diamond core bit isn’t securely tightened in the chuck. |
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The core bit connection end / chuck is defective. |
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The carriage has too much play. |
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Screws / bolts on the drill stand are loose. |
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The drill stand is inadequately fastened. |
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The connection between the diamond core drilling machine and the carriage or spacers is loose. |
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Malfunction |
Possible cause |
Action to be taken |
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The PRCD isn’t switched on. |
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Interruption in the electric supply. |
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Water in the motor. |
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The carbon brushes are worn out. |
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Water in the motor. |
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