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9D717

Hard-bearing balancing machine wide range of rotors weighing up to 1500 kg

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1500

Maximal weight, kg

1800

Maximal diameter, mm

3000

Maximum length, mm

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9D717 is an universal dynamic balancing machine with horizontal axis of rotation type. Generally, It is possible to balance the following kinds on such a machine:

  • inter-support and cantilever rotors
  • rotor on special mandrels (disks, fans, pumps)
  • rotor in own bearings

Thanks to the narrow stands and belt drive, the balancing machine 9D717 is used for balancing of rotors of various structures at repair and production plants.

The machine has high accuracy (0,4 gmm \ kg). Accuracy is achieved due to the special design of the spindle and the rig of the machine, as well as a reliable balancing system, PAK-1, which has a high degree of noise immunity. Ease of control allows you to quickly learn how to work on the machine and get to work as soon as possible. When designing the machine, high demands were placed on the functionality and versatility of each node, this made it possible to install absolutely any driveshaft on the machine with a minimum of time.

Width of the support rollers and roller cartridges allows the rotor to be installed with a very short length. Highly located “roller cassettes” allow you to create products with different overall dimensions, and the modular design allows you to increase the standard dimensions of the machine due to spacers and accessories.

Support has the ability to adjust the “roller block” in height, this allows you to balance the rotor with different diameters of the support journals, and also allows you to center the rotor when setting up the machine.

  • High accuracy 0,4 gmm/kg = 0,4 μm.
  • Real-time balancing process.
  • Short unbalance measurement time.
  • Maximum machine sensitivity with operator-controlled setup and calibration.
  • Large diameter spherical rollers.
  • Measures large initial unbalances without damaging the machine.
  • Belt drive design for rotating any rotor with two belts.
  • Safe balancing at low speeds.
  • Balancing of rotors with very short bearing journals thanks to narrow roller blocks.
  • Smooth speed control and acceleration through a frequency inverter drive.
  • Options: axial drive, extended machine base.
Industrial Application Features
  • High initial unbalance handling capacity – Structural design accommodates rotors with significant initial unbalances including damaged or heavily worn components without machine damage. The robust construction enables large correction operations directly on the machine for enhanced productivity.
  • Modular tooling and spacer system – Configurable mounting arrangement accommodates unusual rotor configurations through specialized tooling combinations. The modular approach maintains measurement accuracy while adapting to non-standard industrial workpiece geometries.
  • Own-bearing balancing capability – Support design enables balancing rotors in their original bearings without bearing replacement requirements. This capability reduces repair time and prevents potential trunnion damage during bearing removal operations.
  • Disk and shaft type rotor compatibility – Mechanical configuration accommodates both disk-type components (impellers, working wheels) and shaft-type assemblies (drums, threshing equipment). The design flexibility enables handling diverse component geometries on single machine platform.
  • Length-independent rotor mounting – Support design accommodates rotors of unlimited length within belt drive or bed constraints without compromising measurement precision. This flexibility enables handling of extended assemblies including metallurgical rolls and printing equipment shafts.
High Precision Balancing
  • Precision roller assembly with advanced bearings – Rollers manufactured using patented “exact barrel”® grinding technology with high-precision bearing integration for superior rotational accuracy. The specialized bearing configuration optimizes performance for medium to heavy rotor applications.
  • High-precision vibration sensor – Sensor configuration optimized for medium-heavy rotor applications with micro-vibration sensitivity and external disturbance filtering. The mounting design provides maximum sensitivity throughout the extended operational envelope.
  • Enhanced measurement stability for industrial environment – Support structure design provides vibration isolation from external sources while maintaining sensitivity to rotor-generated unbalances. This design ensures accurate measurements in demanding industrial workshop environments.
Mechanical Structure Design
  • Monolithic support and base construction – Integrated rigid framework minimizes oscillation system elements to eliminate vibration losses during measurement cycles. This structural design ensures consistent accuracy across the 15-1500kg rotor weight capacity range.
  • Hard-bearing design – Low natural resonance frequency of support structure enables balancing operations at reduced rotational speeds for enhanced safety with heavier rotors. This design characteristic reduces power requirements while maintaining measurement precision.
  • Simple yet robust functional design – Streamlined mechanical architecture provides reliability while maintaining operational versatility for diverse rotor types. The design philosophy emphasizes functional effectiveness over complexity for enhanced maintainability.
  • Narrow stand design with enhanced capacity – Compact support geometry maximizes workspace accessibility while providing structural rigidity for medium-heavy rotor applications. The narrow profile enables installation in constrained environments without sacrificing load-bearing capacity.
  • Adjustable roller block height mechanism – Variable height system accommodates rotor bearing journals from 40-230mm diameter with precise centering capability. The adjustment range enables setup flexibility for diverse industrial rotor geometries including electric motor armatures and generator rotors.
  • Wide roller design for journal accommodation – Extended roller width supports rotors with varying bearing journal lengths while maintaining stability during high-speed rotation. This design feature enables balancing of both compact and extended rotor assemblies.
  • “MICRO-TUNING”® axial alignment technology – Specialized compensation system eliminates measurement errors from axial misalignment during rotation cycles. This technology maintains accuracy regardless of rotor positioning variations during setup and operation.
Drive System Configuration
  • Medium-capacity frequency-controlled drive – 7.5kW electric motor with power reserve design optimizes acceleration and deceleration cycles for the 15-1500kg weight range. Frequency inverter provides smooth speed control across 250-1200 rpm with infinitely variable adjustment capability.
  • Patented “LONG STROKE”® belt drive mechanism – Configuration with an extended stroke capability and only two drive belts can accommodate rotors with different drive surface diameters. This design provides consistent torque delivery while maintaining operational flexibility.

The PAK-1 unbalance measuring unit represents the latest generation of measuring complexes for dynamic balancing, combining high precision, stability, and ease of use. It’s designed to tackle a wide range of rotor balancing tasks, from simple to the most complex, requiring precise measurements.

Based on an industrial fanless computer with a touchscreen and a multi-channel measuring unit, the system ensures reliability and a long service life, even under intensive use. The PAK-1 utilizes a universal measuring path and modern component base, allowing for equally high accuracy when working with all types of rotors.

Its intuitive interface, self-calibration capability, and automation of key operations make the complex a convenient tool for both experienced specialists and beginners.

Features of the PAK-1 System:
  • High-precision dynamic balancing for rotors of any configuration.
  • Industrial fanless PC with touchscreen and multi-channel measuring unit.
  • Setup using trial runs with calibration weights on production rotors.
  • Self-calibration by the operator, eliminating annual service adjustment costs.
  • Calculation of permissible unbalance values, even without technical documentation.
  • Determination of control weight mass to simplify setup for a specific rotor.
  • Real-time display of unbalance magnitude and angular position, including “highlighting” of the correction zone.
  • Automatic measurement start upon reaching a set speed and automatic stop after cycle completion.
  • Display of unbalance magnitude in grams, gmm, gcm, gmm/kg.
  • Vector and exponential averaging for working with moving elements and in noisy conditions.
  • Additional functions that significantly simplify the balancing process and expand the technological capabilities of the balancing machine.
  • Generation and printing of balancing reports directly from the system.
  • USB ports and Ethernet interfaces for connecting a printer, data storage, and integration into a local network.

Parameter

Value

Balancing rotors weight range, kg

15 – 1500

Maximum rotor diameter (over the bed), mm

1800

Distance between rotor bearing journal centers, mm, min/max

360 – 3000

Rotor bearin journals diameter, mm

40 – 230

Machine type

Hard-bearing

Support type

Rollers

Minimal achievable residual specific unbalance, gmm/kg

0.4

Rotor rotation speed range, rpm

250 – 1200

Drive type

Belt

Electric motor power, kW

7.5

Power supply parameters

400V ± 10%, 3 Ph, 50Hz ± 1

Balancing system

PAK-1

Overall machine dimensions (length x width x height), mm

3500 x 1260 x 1500

Machine weight, kg

1700

  • 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.
  • Drive belt – 2 pc.
Drilling module for correcting rotor unbalance directly on the balancing machine

Drilling module

The drilling module, mounted on its own guides, is designed to eliminate rotor unbalance without removing it from the machine. This solution increases productivity by allowing corrections to be made…
Custom extended machine base expanding the range of rotor balancing applications

Extended machine base

On request, the machine can be manufactured with an extended bed, expanding its range of applications. This modification makes it possible to balance rotors of non-standard lengths.
Powerful axial drive for balancing rotors with high aerodynamic resistance or no belt drive

Axial drive powerful

The axial drive enables balancing of rotors whose design does not allow the use of a belt drive or which have significant aerodynamic resistance. A rigid connection to the rotor…

3D Visualization

Free support and training

Engineering

After sale service

Personnel training

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Popular Questions


Your questions — our technical solutions

The 9D717 is an industrial-class model designed for handling large-scale assemblies. Its application range covers key sectors:

  • Energy: Steam and gas turbine rotors, generator rotors.

  • Mining Industry: Winch drums, crusher components, heavy-duty augers.

  • Petrochemicals: Centrifugal compressor shafts, large pump impellers.

  • Ventilation Systems: Industrial smoke exhausters and axial fans with a diameter of up to 1800 mm.

  • Shipbuilding and Railways: Propeller shafts and locomotive traction motors.

Yes, the 9D717 is designed to work with parts weighing up to 1500 kg. Its rigid hard-bearing design allows for mounting massive rotors without the risk of support deformation. High load capacity combined with sensor sensitivity enables effective unbalance elimination on both heavy and relatively light parts (from 15 kg).

In the basic configuration, the machine accommodates rotors with a distance between bearing journals of up to 3000 mm. For working with longer shafts, an extended bed option is provided. We can manufacture a bed of the required length to suit your specific production tasks, while ensuring perfect alignment and rigidity along the entire length of the equipment.

The machine achieves a minimum specific residual unbalance of 0.4 g·mm/kg. For equipment of this capacity, this guarantees compliance with the strictest standards, allowing for balancing to accuracy classes G1 and G2.5 (according to ISO 21940). This is critical for preventing premature bearing wear in heavy-duty machinery.

Yes, the machine is set up for a new product type by the operator using trial runs with calibration weights.

This approach offers several key advantages for B2B production:

  • Maximum Sensitivity: Calibration allows adapting the measuring system to the specific geometry and mass of the rotor, minimizing error.

  • Accuracy Control: The operator can verify and confirm measurement accuracy at any time, eliminating the accumulation of errors during long-term operation.

  • Flexibility: The machine maintains reference-level accuracy even with non-standard or complex parts, as the system is tuned to the actual response of the specific rotor.

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