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  GMN - High Frequency Grinding Spindles  
 
   

75 years of experience in the field of grinding spindles have shown results. GMN – High Speed Grinding Spindles have been accepted world-wide as the standard for universal grinding machines. GMN's reliability is derived from over this experience in design, use and manufacture of precision rotating mechanisms.

The features of GMN spindles are:

:: Short, rigid construction due to high-frequency motor being placed between the  
   bearings sets, results in favourable critical speeds, far exceeding the operating 
   speed
:: High stiffness and load carrying capacities due to use of ultra precision hybrid   
   bearings
:: Minimal temperature variations due to liquid cooling of the motor and front 
   bearing complement
:: Monitoring of motor temperature
:: Oil-air lubrication for higher reliability

HSX spindles with hybrid ball bearings

HSX models have over the years replaced the former TSSV and HS models. The use of hybrid bearings is standard in all the models. With the use of hybrid bearings, the shaft diameters of the all the models have been increased to give much higher stiffness as compared to the old models with steel bearings. Higher motor power is provided to make the maximum use of the mechanical strength of the spindle.

The features of the HSX spindles are:

:: Speeds upto 105000 rpm
:: Motor power upto 35kW
:: Use of hybrid bearings with ceramic balls for high stiffness
:: Water cooling of motor as well as front bearings
:: “Field weakening” motors offer high torque at low speeds
:: Oil-air lubrication
:: Option: Coolant through shaft / Air purge
:: Speed sensor for actual speed monitoring
:: PTC for motor temperature monitoring

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New – HVX spindles with still higher stiffness values and higher motor power

With the increasing demand of shorter cycle times, the HSX spindles needed an upgrade.
The new HV-X series of spindle is the answer to the requirement. The HV-X models have a larger bearing size than the HSX models. Also the motor power are comparatively higher.
With the improvements of power, load carrying capacity and stiffness in the HV-X designs, the working range of single spindle is extended over the previous models. These enhancements minimize the number of spindles required to cover a large speed range.

The features of these spindles are:

:: Speeds upto 105000 rpm
:: Motor power upto 37kW
:: Use of hybrid bearings with ceramic balls for high stiffness
:: The bearing size is larger than the one used in HSX spindle for similar speeds
:: Water cooling of motor as well as front bearings
:: “Field weakening” motors offer high torque at low speeds
:: Oil-air lubrication
:: Option: Coolant through shaft / Air purge
:: Speed sensor for actual speed monitoring
:: PTC for motor temperature monitoring

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TSEV spindles with external motor

:: External type grinding taper
:: Precision bearings, solid preloaded
:: Permanent grease lubrication
:: Clamping on cylindrical housing
:: Direct AC voltage or higher frequency for high speeds
:: Economical support systems
:: For heavy machining operations
:: For high Stiffness requirement
:: Option: Provision for automatic wheel balancing
:: PTC for motor temperature monitoring

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HVXs spindles with low motor power

With wide experience from the user industry, there are some areas of grinding where you do not need high motor power.
The new HVX-s spindles offer the same mechanical rigidity of the HVX series with larger bearings, but with smaller motor power. The advantage is that using these spindles reduces the cost of frequency convertor and chilling unit.

Presently the following models are available:

HV-Xs 120-60000/7.5
HV-Xs 120-45000/7.5
HV-Xs 120-30000/7.5

For more information visit www.gmn.de

   
 
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