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    Crankshaft balancing machine 9D715US for parts up to 300 kg.PAK-1

    The 9D715US machine has unique capabilities that allow it to effectively handle a wide range of crankshaft balancing tasks in engine overhaul shops.

    Thanks to its innovative technology and high performance, it solves the following tasks:

    • Measuring and correcting large initial crankshaft imbalances.
    • The narrow support rollers allow the crankshaft to be balanced complete with flywheel and pulley, while the compact size of the belt drive eliminates the difficulties of balancing with bobweights attached to the crankshaft.
    • An integrated drilling unit mounted on its own guides increases the productivity of the balancing operation.
    • The software function for converting unbalanced mass to drilling depth ensures accurate and efficient unbalance correction directly on the machine.

    With the 9D715US balancing machine you get a reliable and powerful tool for high accuracy and quality crankshaft balancing.


    The universal balancing machine model 9D715US can handle these types of parts :

    • Inter-supported “shaft” type (the center of mass of the part is between the supports);
    • Cantilever type (most of the part mass is located on one side behind the supports);
    • Disc type part (if the part does not have its own bearing journals, a mandrel is used for balancing);
    • A part on its own bearings.


    The unbalance is detected by means of force sensors located in the vibrating supports and a velocity sensor which monitors the rotation of the part. The force transducers convert the support vibrations caused by the unbalanced part into digital signals. The rotational frequency of the part is also converted into electrical pulses. The information from the sensors is processed by the balancer’s computing unit, then output in a convenient format to an information output device such as a computer or a microprocessor screen.

    Customer may choose one of the two ready-to-use balancing systems when ordering the machine: PB-02M (microprocessor-based system) or PAK-1 (industrial computer-based system). We can also develop a completely new balancing system by special order with the functions that you suggest.

    • The support rollers of the machine are made according to the patented technology of grinding “exact barrel”, this as well as high-precision quality bearings and unique technology of assembling provided the accuracy of unbalance determination 0,4 g*mm/kg (can be 0,1 g*mm/kg);
    • Design and height of supports and roller cassettes allow safe work with large-sized parts;
    • The patented construction of the machine “MODULAR DESIGN” is highly modular and it is possible to modify the machine characteristics by changing the modules;
    • Thanks to the adjustment of the position of the rollers, the “belt drive” assures a perfect adherence of the belt to the workpiece without any slippage during rotation. This feature, as well as the tensioning force of the belt, contributes to the high accuracy of the machine.
    • The “axial drive”, thanks to its rigid coupling with the workpiece, makes it possible to ignore the errors associated with the high aerodynamic resistance of the workpiece and to accelerate/decelerate quickly, thereby reducing the balancing cycle; the “axial drive” also has a “quill” which also reduces the balancing cycle, making it easier to set up and more comfortable.

    Functions of the hardware-software complex PAK-1:

    • Calculation of permissible unbalance, drilling depth and test weights eliminates the need for complex mathematical calculations;
    • Vector averaging improves machine accuracy during the balancing process by summing up differently directed unbalance vectors into a single vector;
    • Mathematical consideration of tooling eccentricity will cut off the “parasitic” vibration of the tooling and the part to be balanced;
    • Distribution of unbalance on the n-plane correction distributes the total unbalance to multiple planes (in case of limited space for mounting an overall correction weight);
    • Distribution of the correction weight to structurally determined points (e.g. blades, slots, holes);
    • Creating, storing and printing reports of balancing results helps eliminate “quality of work” issues.

    Main Specifications

    Parameters 9D715US
    Balancing rotors weight range, kg 3 – 300
    Maximum rotor diameter (over the bed), mm 1300
    Rotor bearin journals diameter, mm 30 – 180
    Distance between rotor bearing journal centers, mm, min/max 150 – 1350
    Support type Rollers
    Minimal achievable residual specific unbalance, gmm/kg 0,4
    Rotor rotation speed range, rpm 300 – 1500
    Drive type Frequency-controlled asynchronous electric drive
    Electric motor power, kW 2,2
    Drive gear type Belt
    Equipment Balancing device
    Bed length, mm 1600





    The operation manual on the machine with acceptance tests reports and the basic electric circuit 1 pc.
    The operation manual on balancing system 1 pc.


    High universality

    Service in the EU

    Short time measurement

    Low-cost maintenance

    Reliable and productive

    Quick payback time

    Design features of the machine 9D715US

    Generally, every hard-bearing balancing machine (9D715US in this case) has the unique micro-tuning mechanism ® technology, that eliminates the “thread” effect (when the rotor moves axially).

    Furthermore, the supports are set relative to the bed with a chain mechanical drive, this simplifies the setup process.

    So the special design of the supports allows you to install the rotor without paying attention to its length, the only limitation is the width of the “drive belt” and the length of the bed (By special order, the bed can be made under the rotor of any length).

    The “belt drive” has the patented LONG STROKE ® design which allows with just two drive belts to balance any rotor regardless.

    However, there is an alternative to a “belt drive” is an “axial drive”, which uses a driveshaft that is capable of transmitting large torque from the electric motor to the rotor. Such a drive is used for parts with high aerodynamic drag. In addition, the axial drive of all machines of the 9D series is equipped with a full-fledged quill.

    By special order, it is possible to order a combined version of the machine (with two drives: axial and belt).

    Belt drive also provides versatility of the machine, the large travel of tension pulley allows only one or two belts to be used. Belt installation does not require disassembly of the unit.

    All electrical equipment is located in the cabinet, the outer cables are in metal hose. Nevertheless, the assembly matches CE standards.

    Preconfigured frequency-controlled asynchronous electric drive allows controlling of the rotor speed, as well as acceleration and deceleration process.

    Lastly, safe working conditions on the hard-bearing balancing machine 9D715US are provided by rigid stops, protective covers of the drive belt and rotating pulleys, safety interlocks, ergonomic controls, etc.

    Crankshaft Balancer 9D715US
    Crankshaft Balancer 9D715US
    Crankshaft Balancer 9D715US


    Firstly, the digital system is based on an industrial fanless computer with a touch screen and a measuring unit.

    Secondly, set-up mode by “triple start-ups” method with the use of calibration weights on the serial rotors with initial unbalance.

    At last, calibration of the machine is made by the operator enabling to reach the maximum sensitivity of the machine, thus exempting from the duty to pay annual calibration fees.

    Even so, take in consideration following functions:

    • Calculation of the balance tolerance values in default of technical documentation for the balancing product.
    • Value calculation of the correction test weights to simplify the tuning process for the balancing rotor.
    • Real-time balancing display, i.e. if there is any defect or a hindrance of a rotor, it’s visible immediately as fluctuation in measurement result.
    • View of unbalance value in grams, gmm, gsm, gmm / kg optionally.
    • Taking into account the eccentricity of the balancing mandrel.
    • Unbalance distribution on n-planes correction
    • Calculation of hole depth for correction of unbalance.
    • Possibility of decomposition of correcting weights into structurally conditioned anchoring points (blades, fans, slots).
    • Rotor balancing report creating and printing.
    • USB port for printer connection, USB-flash memory, port for connecting to local network and Ethernet network.
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