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9K716

Soft-bearing balancer for rotors up to 300kg, belt-driven, high precision

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300

Maximal weight, kg

1800

Maximal diameter, mm

2000

Maximum length, mm

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Suitable for rotors with high demands on manufacturing quality

The machine 9K716 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.

Characteristic features of soft bearing  balancing machines:

  • Self-aligning rollers.
  • Frequency-controlled asynchronous electric drive.
  • The presence of jacks for smooth and shock-free installation of the rotor.
  • The possibility of using the machine without installation on a special foundation.
  • 2 end stops included.

  • HIGH BALANCING ACCURACY 0,4 GMM/KG
  • REAL TIME DISPLAYED IMBALANCE MEASURING
  • SOFT-BEARING SYSTEM ENSURING LINEAR SENSITIVITY AND HIGH PRECISION ACROSS ALL SPEEDS
  • SELF-ALIGNING ROLLER BLOCKS AUTOMATICALLY ADJUST TO THE ROTOR ON TWO AXES
  • CYLINDRICAL ROLLERS HAVE A WIDE CONTACT AREA TO PREVENT ROTOR SURFACE DAMAGE
  • LONG STROKE BELT DRIVE
  • INFINITELY VARIABLE SPEED CONTROL OF THE ROTOR IS PROVIDED BY THE FREQUENCY INVERTER DRIVE
  • OWN ADVANCED MEASURING SYSTEM
  • SELF-DIAGNOSTICS FUNCTION
  • ENGLISH INTERFACE
  • CUSTOMISED PRINT OUT OF BALANCE DATA
  • DATA STORAGE TO INTERNAL FLASH MEMORY AND USB MEMORY STICK
  • 17-INCH TOUCH SCREEN MONITOR
  • OPERATION & SERVICE PERSONALIZED MANUALS
  • INTUITIVE SIMPLE OPERATIONING
  • HIGH PRODUCT RELIABILITY
  • SAFETY OPTIONS MODIFICATIONS
  • LOW-COST SPARE PARTS
  • OEM AND AFTERMARKET REPAIRS
  • 12 MONTHS WARRANTY
Self-Aligning Support Systems
  • Self-aligning roller cassette design – Roller cassettes automatically adjust to rotor positioning in two axes, reducing setup time and eliminating rotor surface damage from misalignment. The self-aligning feature minimizes operator skill requirements while ensuring optimal rotor-to-roller contact geometry for medium-weight applications.
  • Wide cylindrical roller configuration – Roller width designed to support medium rotors for extended periods without surface “knurling” effects on rotor bearing journals. The wide contact surface with radius chamfers distributes loads evenly to preserve rotor surface integrity across the weight range.
  • Hardened roller surface treatment – Rollers manufactured with 52-56 HRC surface hardness ensuring extended service life while maintaining optimal contact characteristics for medium rotors. The hardness specification balances durability with rotor surface protection requirements across the capacity range.
  • Height-adjustable roller cassettes – Variable height mechanism accommodates rotor bearing journals from 10-240mm diameter while maintaining precise alignment and support characteristics. The adjustment range enables flexibility across diverse medium rotor geometries including gas turbines and industrial equipment.
Precision Measurement Integration
  • High balancing accuracy up to 0.4 g·mm/kg across the entire range of rotor masses. This makes balancing machine 9K716 indispensable for balancing heavy parts that require low vibration levels.
  • High-movement pendulum suspension – Suspension design provides exceptional sensitivity for micro-vibration detection with operator “feel-based” assessment capability after balancing. The high-movement characteristic enables tactile verification of balance quality complementing electronic measurement systems.
  • Enhanced vibration isolation – Soft-bearing design provides superior isolation from external vibrations while maintaining sensitivity to rotor-generated unbalances. This isolation ensures accurate measurements in demanding industrial environments with external disturbances.
Mechanical Structure & Base Design
  • Medium-capacity soft-bearing pendulum suspension system – Pendulum-mounted support structure provides exceptional measurement sensitivity with visual resonance detection capability for rotors up to 300kg. This soft-bearing design enables unmistakable identification of resonance frequency range and tactile residual vibration assessment optimized for medium-weight applications.
  • Compact floor-mounted installation design – 2400mm base structure eliminates basement requirements and enables direct workshop floor installation with optional anchoring system. This foundation-independent approach reduces installation costs while providing flexibility for anchored or non-anchored configurations in diverse manufacturing environments.
  • Modular design architecture for medium applications – MODULAR DESIGN® system enables interchange of tooling and machine characteristics including diameter adjustments and cassette modifications. The modular approach maximizes machine adaptability across diverse medium-weight rotor applications without equipment replacement.
Specialized Application Features
  • Own-bearing balancing capability – Self-aligning roller design simplifies balancing rotors in original bearings by ignoring interference from misaligned bearings. This capability accommodates agricultural machinery rotors, threshers, and chopper shafts without bearing replacement requirements.
  • Installation jack system – Integrated jacks with soft material overlays enable hammerless rotor installation to accelerate balancing processes while preventing surface damage. The jack system facilitates handling of fluid couplings, impellers, and similar components requiring frequent removal and installation.
  • Cantilever rotor balancing capability – Specialized bracket system enables balancing of rotors with center of gravity outside bearing pedestals. This capability accommodates specialized rotor configurations with unusual weight distribution characteristics common in agricultural and industrial machinery.
Efficient Medium-Capacity Drive System
  • Optimized frequency-controlled drive – 4.0kW electric motor with power reserve reduces acceleration and deceleration times while ensuring adequate torque for medium rotor configurations up to 300kg. Frequency inverter provides smooth speed regulation across 300-2800 rpm range with motor protection and stepless control capability.
  • Patented “LONG STROKE”® belt drive system – Advanced belt drive design with wide tension adjustment range utilizes only two belt sizes to accommodate all medium rotor requirements. The patented system enables rapid belt changes and precise tension adjustment critical for soft-bearing measurement accuracy.
  • Adjustable tension pulley mechanism – Variable tension system allows precise belt force adjustment to optimize soft-bearing measurement characteristics while preventing over-tensioning effects. The adjustment capability ensures optimal drive characteristics across diverse rotor weights and configurations up to 300kg.

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

3 – 300

Maximum rotor diameter (over the bed), mm

1800

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

140 – 2000

Rotor bearin journals diameter, mm

10 – 240

Machine type

Soft-bearing

Support type

Rollers

Minimal achievable residual specific unbalance, gmm/kg

0.4

Rotor rotation speed range, rpm

300 – 2800

Drive type

Belt

Electric motor power, kW

4

Power supply parameters

400V ± 10%, 3 Ph, 50Hz ± 1

Balancing system

PAK-1

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

3000 x 1350 x 1500

Machine weight, kg

450

  • 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.
Axial drive for balancing rotors unsuitable for belt drive or with high aerodynamic resistance

Axial drive

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…
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.

Free support and training

Engineering

After sale service

Personnel training

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Popular Questions


Your questions — our technical solutions

The 9K716 machine is specifically designed for high-precision balancing of a wide range of between-support rotors. Thanks to its soft-bearing design with a lever-type suspension, it effectively handles:

  • Electric motor and generator armatures.
  • Centrifugal pump rotors and fans.
  • Turbines and spindles.

Rotors with high requirements for journal quality, as the self-aligning roller blocks eliminate the risk of surface damage and ensure a perfect fit.

Yes, the machine is designed to handle loads ranging from 3 to 300 kg. A key feature of the non-resonant suspension type is that the machine measures the vibrations of the entire system (rotor + suspension) at frequencies above the resonance frequency.

This allows for highly accurate determination of imbalance regardless of the mass of the rotor being balanced, making balancing possible across a wide range of masses.

The standard bed design is tailored to the most commonly requested dimensions; however, VTM Group’s technical capabilities allow us to manufacture machines with extended beds (over 2000 mm) to meet specific production needs.

During your consultation, please inform our sales manager of your desired bed length, and we will recommend a suitable option.

The use of a soft lever-type suspension makes the 9K716 machine one of the most sensitive in its class. It achieves a residual specific imbalance of 0.4 g·mm/kg, which fully complies with the G0.4 accuracy class according to ISO 21940.

Self-aligning rollers minimize the impact of alignment errors, ensuring repeatable results during batch balancing of critical components.

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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