a)Advanced material

    Polyether Ether Ketone (PEEK), one of the special engineering plastics, was developed in 1978. Considering its outstanding properties like excellent bone matching, high-strength, high modulus, light quality and X-ray penetrated, PEEK has been made to artificial spines at the earliest, then gradually applied in aerospace, high-precision machinery and other fields.

    b)Advanced design

    According to the material characteristic of PEEK, TIMG uses the simulation analysis like aerodynamics, high speed deformation and plastic injection molding, which makes our design more suitable for the working condition of spindle both in theory and reality.

    With the combination of advanced material and design, TIMG makes our cage perform better.

    Centrifugal Expansion of Cage

    Cage made from Nylon or Bakelite will produce great deformation in high-speed operation, which will directly affect the performance of processing equipment.

       TIMG considers that cages made from Nylon or Bakelite should be phased out in machining center spindle bearings, and we recommend advanced PEEK as cage’s material.


    Under the same design condition, when the bearing rotates at 10,000rpm,

          the cage made from PEEK shows less deformation than from Nylon or Bakelite, about 20% off.

    CFD of Cage

    TIMG considers that the airflow field in the spindle can be confirmed by the aerodynamic simulation, which ensures our bearing performs better in the spindle.

    Cage airflow field analysis cloud chart

    Plastic Injection Molding Analy

    The simulation of plastic injection is necessary to the mould’s design.

    Cage Mold Flow Analysis Cloud


    TIMG has developed professional software for the design of ball bearing, so that the whole development progress becomes more concise and reliable.

    Quasi-statics Analysis

    The quasi-static analysis is combined with the working conditions of the bearing, so that under different conditions, the stress situation of various parts of the bearing is more data-dependent.

    Quasi-statics analysis and calculation formula

    Quasi-statics analysis and calculation results

    Contact Stress Analysis

    TIMG uses the contact stress analysis to confirm internal stress of each part during the application of the bearing, 

    thus providing a strong basis for the matching of the bearing life.


    Centrifugal Expansion Calculati

    By using the simulation calculation of centrifugal expansion, it is effective to know whether the setting of interference is reasonable under the condition of different spindle installation.

    Actually, the preload of the bearing will increase, due to the centrifugal force of balls, the temperature difference of inner ring and outer ring, the centrifugal expansion of the inner ring, the thermal expansion of balls, etc. The above factors can be considered by the finite element analysis to obtain a reasonable application scheme.

    Centrifuge expansion cloud

    Thermal Extension of Spindle

    TIMG carries out the temperature field simulation on our testing machine, and verifies the running state of the bearing combining with our experiments on spindles.

    Spindle thermal elongation cloud

    Vibration Analysis

    Damage process of the bearing is the change of tangential force → micro-crack → crack → damage. These will all be reflected by the vibration signals. TIMG gathers those vibration signals and interprets them through the mathematical calculation. Especially the early tangential force changes in the vibration signal interpretation, we can carry out some diagnosis in the early stage, which is of great significance in the application of the bearing.

    Vibration chart

  • Dynamic Rigidity

    Dynamic Rigidity

    Experiment on Spindle

    Experiments on various spindles of the most popular brands are compared between the original bearing and TIMG, working at 8,000rpm, kind of limit. And experiments are carried out by means of vertical installation and without any cooling measures, which is close to actual application conditions.

    Run-in test site pictures are as follows:


    Under the same rigidity condition:

          TIMG performs better than the originals, more than twice times longer in bearing life.

    We should pay attention to the spindle axial rigidity measurement during application, so that the bearing could better play its excellent performance.

    More information about our experiments, please contact TIMG.