Although the spindle nut is only a small thing for a cnc router engraving machine, a lot of friends maybe do not understand its importance. The nut without balance correction will greatly shorten the service life of spindle motor and your wood router machine. Furthermore, it may cause problem of chatter mark on the engraving finish surface. 

A lot of friends will have questions when they choose the spindle nut for their cnc machines. Why choose dynamic balancing nuts, is it same if using ordinary nut? What is the difference between the common nut and lengthened nut? We are here to answer these questions today.

What is the benefit if using dynamic balance spindle nut? You can get three benefits:

First benefit, improve the engraving accuracy; make the carving work more exquisite and beautiful.

Second benefit, obviously reduce the noise and vibration of electric spindle so as to prolong the service life of the spindle motor.

Third, the vibration of the spindle motor is reduced; thereby the router cutter bit break rate is reduced.

Which one is better, common nut or lengthened nut?

Difference: the lengthened nut has two more threads than common nut.

Benefit: Because the longer thread is difficult to become slide, the spindle motor rotor is protected.

1. Origin nut from spindle factory is all lengthened ones. 

2. Many customers say good to extended nuts.

What is Dynamic balance correction?

Simply speaking, dynamic balance is to eliminate the partial sink of the nut. If the nut is partial sink, it will cause the spindle motor rotor to be partial sink; if spindle motor rotor is partial sink, the spindle will have vibration and large noise. And the final result is the spindle service life is reduced.

Explanation from professional field

Any rotor that rotates around its axis produces centrifugal force due to uneven mass distribution with respect to the axis. This unbalanced centrifugal force will cause vibration of the rotor bearing, noise and accelerated wear of bearings, which will seriously affect the engraving finish and shorten service life of the spindle.

Doing dynamic balance correction for the rotor with a balancing machine can improve the mass distribution of the rotor relative to the axis, and then reduce the vibration caused by the rotation of the rotor or the vibration force acting on the bearing to the allowable range. Therefore, dynamic balancing is an essential test procedure for reducing vibration, improving performance and quality. This is why the original matching nut is good. The new nut bought from the market is noisy and accompanied by vibration.

Then what is the standard of dynamic balance?

Answer is that the accuracy is not more than 0.003 grams.

We found that 95% of the nuts which are on sale in the market now have not done dynamic balance correction. Using this nut will undoubtedly shorten the service life of your cnc router carving machine. Just imagine, nut without dynamic balance correction must have noisy working at speed of 24000 RPM. Noise represents vibration and vibration is the biggest damage to spindle motor bearings.

So please don't neglect the importance of this small nut on the cnc engraving machine.

To order the nut, please click dynamic balance spindle nut

                                                                                       
                                                                                                              Original article from Jinan EagleTec CNC Machinery Co.,Ltd.

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