Lubrication units for high-performance spindles - longevity and top performance for your machines

Modern machines require maximum precision and reliability – and this is where GMN’s high-quality lubrication units come into play. With innovative solutions, such as the Prelub GP PLUS series, GMN guarantees efficient and long-lasting lubrication for high-precision spindles.

Thanks to precise oil-air metering and intelligent control, the lubrication unit ensures optimum bearing lubrication, minimizes wear, and maximizes the service life of your spindles.

 

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Lubrication units from GMN - innovation for maximum performance

With PRELUB GP PLUS, GMN offers a technologically advanced lubrication solution that is perfectly tailored to high-performance applications. Thanks to the precise control and simple, tool-free lubricant metering, companies benefit from long-lasting, trouble-free machine performance.

Advantages of PRELUB GP PLUS lubrication units

  • Efficient lubrication: Extends the service life of spindle bearings through targeted oil-air lubrication.
  • Cost-saving: Lubricant consumption is reduced by automatically interrupting the lubrication cycle when the spindle is idle.
  • Space-saving design: Compact design with four connections for simultaneous lubrication of two spindles. The GP 0 PLUS has an external mixing distributor with max. 4 lubrication points. Only the GP-S PLUS can be used with an external mixing distributor with max. 12 lubrication points.
  • Simple operation: Intuitive menu navigation with multilingual text displays for maximum user-friendliness.
  • Flexibility: Interchangeable with the predecessor model PRELUB GP and compatible with most competitor products.
  • Modular design: The control unit and mechanical part are separate, which simplifies maintenance work and allows system components to be replaced in a targeted manner.
  • International user-friendliness: Thanks to the menu language settings (DE, ENG, ES, FR, IT, JP, CN), PRELUB GP PLUS devices can be used worldwide without any problems.

Why should you choose lubrication units from GMN?

The right lubrication is crucial for the functionality and longevity of high-precision spindles. GMN stands for quality, innovation and decades of experience in manufacturing high-performance components for the mechanical engineering industry.

With a lubrication unit from GMN, you benefit from:

  • Customized lubricant metering for maximum operational reliability
  • Modular system solutions for individual requirements
  • Low-maintenance and reliable components with a long service life

In addition, the PRELUB GP PLUS makes it easy to retrofit existing systems without the need for costly conversions. Thanks to its standardized interface, competitor products can also be easily replaced, allowing companies to benefit directly from the advantages of GMN technology.

 

Technical highlights of the PRELUB GP PLUS

The lubrication unit is equipped with the latest technology:

  • Compressed air filter/regulator with pressure gauge (filter fineness 5 µm)
  • Electronic control with direct control of oil level, oil pressure and air pressure
  • Transparent lubricant reservoir with visual fill level indicator
  • Mains voltage from 90 to 260 V AC for flexible use
  • Protection class IP55 for safe use in demanding environments
  • Lubrication cycle adaptation: The cycle times can be flexibly adapted to the oil viscosity and spindle data.
  • Delivery volume mixing distributor: 30 mm³ (standard) or 10 mm³ (e.g. UH series) per lubrication pulse.
  • Lubrication point connections: Suitable for PVC pipe 6 × 1 mm (30 mm³) or 4 × 1 mm (10 mm³).
  • Air supply G1/4″: pmin = 5 bar, pmax = 10 bar for stable operation.
  • Plug connection for power and signal transmission: Simple integration into existing machine control systems.
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The PRELUB GP PLUS ensures fully automatic pre-lubrication, which guarantees a reliable start of the spindle. Depending on the cable length, several lubrication pulses are emitted before the system switches to normal operation, ensuring reliable lubrication even before the spindle starts up.

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Prelubrication

Automated timeout

1. Start pre-lubrication (release signal not used for spindle operation)

2. Several lubrication pulses within a short time, depending on the line length between the spindle and the mixing distributor (pre-lubrication cycle)

3. Release signal after the pre-lubrication time is completed

4. Transfer to the normal cycle (cycle time) as per the GMN operating manual

The duration of pre-lubrication depends upon the length of the connected

lubrication lines.

(Details: see operating manual)

GMN lubrication units: Efficient lubrication for maximum machine performance

GMN’s innovative lubrication units – particularly the PRELUB GP PLUS – provide companies with a state-of-the-art solution for lubricating high-precision spindles. With efficient oil-air lubrication, intuitive control and maximum operational reliability, GMN is setting new standards in machine performance.

 

Rely on quality and experience – with GMN lubrication units for long-lasting and trouble-free spindle performance!

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Maintenance and accessories for lubrication units

For reliable lubrication, having not only the right unit is crucial but also the right accessories. GMN offers high-quality lubricant hoses, hydraulic and air hoses, as well as filtered lubricating oil – all perfectly matched to the PRELUB GP PLUS.

  • Maintenance-friendly design: The transparent lubricant reservoir allows the fill level to be checked quickly and makes changing the lubricant much easier.
  • Maintenance of the oil and air supply: Regular filter changes are required to ensure consistently high lubrication quality. The appropriate filter cartridges are available directly from GMN.

GMN cooling units

Coolant accessories

The reliable availability of the required coolant quantity and temperature reduces the heat generation caused by the operation and ensures maximum detachable spindle speeds.

GMN cooling units ensure precisely adjustable temperature and quantity delivery of the cooling medium and achieve consistently low operating temperatures.

High-precision control accuracy reduces axial shaft misalignment, caused by temperature fluctuations in the coolant.

 

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Design F (similar to figures) 
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Design T (similar to figures) 

GMN Cooling unit K 0.9 … 11.8

  • Refrigerant: CFC-free
  • Temperature of the cooling medium: 20 °C – 25 °C
  • Control accuracy: Design T: ± 2°K / Design F: ± 1 K
  • High-precision control accuracy (upon request): (For low axial shaft spindle bearings) Design T: ± 1,2 K / Design F: ± 0,5 K
  • Allowed environmental temperature: + 42 °C
  • Connections for several spindles upon request (parallel or series connection)
  • Coolant sensor: Level and flow monitoring with a fault message contact
  • Color: Design F: RAL 5019 (capri blue) / Design T: RAL 9005 (deep black) / Further RAL-colors (upon request)
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1) In addition to high-pressure monitoring, also available with low-pressure monitoring in the coolant circuit.
2) At 37 °C ambient temperature and 20 °C water temperature. The performance is reduced at higher ambient temperatures.
3) Other voltages and frequencies upon request.
4) Assumptions: Spindle power ≥ 80 kW means reduced coolant performance needs of 12% or 10%, related to spindle power.