SR65 Drill Motor

 Power of 7.5 kW at 400 Volt with only a weight of 18.3 kg

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SR65 Drill Motor

SR65 Drill Motor

The SR65 is a further development of the new SR-drive for Drill Motors that is already used on the SR35 and SR75. 
Like the SR75, this drill motor brings power of 7.5 kW at 400 Volt with only a weight of 18.3 kg. 



The motor is based on the principle of the switched reluctance motor (SR = switched reluctance). The stator is very robust but simple. The rotor consists of a shaft on which there are strung several single steel laminations. This allows the motor to work without any turning windings or short circuit rotor and also without commutator and wear-affected carbon brushes. The motor is saves resources and consists almost only of steel and copper.

The commutation (alternating current of the stator poles) is managed by the electonic power which gets its order from a microcomputer. The speed over the whole capacity range is constant, making the drill start easier, the wear reduced and the efficiency of the drill bit increased. The SR65 has six fine adjusted speed, which can be chosen while drilling on its robust keypad. The LED display clearly showing the operator the suitable drilling diameter. The SR65 does not have gear speeds and is therefore lighter than the larger SR75 model.

Motor protection

The motor current is controlled corresponding to the requirements and limited to the maximum. Therefore it cannot be overloaded.
Via thermal protective switches the actual temperature of the motor and the electronic power is registered and if deemed necessary will be switched off safely. Thus the motor and power are protected directly against thermal overload which may occur on insufficient cooling.

Oil bath lubrication with oil pump

The gear is lubricated optimally in all general purposes and offers a high efficiency on long lifetime and little maintanance. 

Safety Clutch

Due to this new type of motor, the SR65 is fitted with a novel multi flange clutch which protects the operator, the tools and the motor against high mechanical overload. The higher number of friction surfaces guarantees a nearly constant releasing torque even after a few hundred overload cycles. Through the limiting of the torque by the motor management the wear out of the clutch is extremely low.

Water Cooling

The motor together with the electonic power is optimally cooled by a water cooling system that is patented. It is already used successfully in the DK42 and DK52 and the SR35 and SR75. The water flow is controlled through the interspace between the motor case and the case sleeve. Through this arrangement the electrical part is completely separated from the cooling and thus the electrical safety is guaranteed.

Metal Case

The skin is completely made of aluminum. Therefore is very robust, thermally stable and prepared for outstanding professional use. The casing is protected at the sensitive side by a laterally running carrying handle. 


The operating hours counter which is integrated in the micro controller allows for 250 hours of permanent operation. Then the operator can maintain the motor by only starting, when my start button is pressed three times.

The SR65 Jumbo is not only very strong and robust, but also water protected. With proper use water cannot enter the inner workings. Therefore the Drill Motor is able to drill upwards in a vertical position (overhead drilling) without any further precautions.

Technical Data

Voltage 400 3~
Current 15A
Power 7500W
Output Power 5700W
Speeds 140-175-205-240-270-305
Torque 240Nm
Length 515mm
Weight 18.3kg
Drilling Diameter 125-500mm
Tool Fixture 1 1/4


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SR65 Drill Motor

SR65 Drill Motor