Luoyang Tedin Bearing Co.,Limited
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QC & Measuring Process
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TEDIN Bearing Co., Ltd.

Tel.:     0086-379 67301199

M.P:    0086-136 63889399

Whatsapp:  8613663889399

Skype:  lysnzc
E-mail: sales@tedin-bearing.com;

Web: www.tedin-bearing.com;

Test Methods for Slewing Bearing

1. Test for Basic Dimensions:

   Place the bearing on a clean platform after demagnetization cleaning.

   1.1 Test for Inner Ring’s Dimension:

   Equipment: gauge block, tube ruler


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        gauge                                                                  tube ruler

 

   Procedures:

   --- Set the gauge blocks to the dimension of inner diameter, keep constant temperature for 8 hours.

   --- Set the tube ruler to inner diameter by means of gauge blocks.

   --- Measure the inner diameter and record the results, compare the results with allowed tolerance.

   Notice: Test method for other radial dimensions is the same as for inner dimension.


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Test for Inner Ring’s Dimension

   

     1.2 Test for Assembly Height:

      Equipment: height gauge

      Procedures:

      --- Turning the bearings for several circles, in order to reset all components.

      ---- Place the movable blocking foot of height gauge to the highest surface of the bearing, record the result, and compare the results with allowed tolerance.

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Test for Assembly Height

 

 

2. Test for bearing runout:

   2.1 Test for the radial runout of outer ring:

      Equipment: magnetic base, dial gauge.

      Procedure:

      --- Place the magnetic base on the inner ring, and set the probe on the outer ring - outer ring diameter.

      --- Turn the outer ring at least one circle, record the results and compare them with allowed tolerance.

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Test for the radial runout of outer ring

  

    2.2 Test for the radial runout of inner ring

       Equipment: magnetic base, dial gauge

       Procedure:

       --- Place the magnetic base on the outer ring, and set the probe on the inner ring - inner ring diameter.

       --- Turn the outer ring at least one circle, record the results and compare with allowed tolerance.

 

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Test for the radial runout of inner ring

  

3. Test for bearing’s axial runout:

   3.1 Test for the axial runout of outer ring

      Equipment: magnetic base, dial gauge

      Procedure:

      --- Place the magnetic base on the inner ring, set the probe on the upper surface of the outer ring.

      --- Turn the outer ring at lease one circle, record the results and compare with allowed tolerance.

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 Test for the axial runout of outer ring

   

   3.2 Test for the axial runout of inner ring

      Equipment: magnetic base, dial gauge

      Procedure:

      --- Place the magnetic base on the outer ring, set the probe on the upper surface of the inner ring.

      --- Turn the inner ring at lease one circle, record the results and compare with the allowed tolerance.

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Test for the axial runout of inner ring

 

4. Test for clearance

   Equipment: lifting jack, 3 accordant supporting platform, 3 magnetic base, 3 dial gauge

   Procedure:

   --- Put the 3 accordant supporting platforms equally spaced on a big platform in a circle same as the bearing’s outer ring’s diameter, then place the bearing on the 3 platforms, adjust the spaces between the platforms, make the platforms only supporting the bearing’s outer ring.

   ---  Put 3 lifting jacks equally spaced on the bearing’s inner ring between the platforms.

   ---  Place the magnetic base on the outer ring, set the probe on the inner ring’s surface where the lifting jack support.

   ---  Using the 3 lifting jack support the inner ring at the same time, record the 3 results on the 3 dial gauge, the average value is the actual clearance, compare the value with allowed clearance. 

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 Test for Clearance

5 . Test for Torque:

   Equipment: Torque meter,

   Procedure:

   --- Place the bearing on a platform, assemble a matched screw on the hole of the inner ring

   --- Make the Torque meter hook the screw, pull in the tangential direction, record the results, turn the bearing at least one circle, compare the results with allowed value.

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Test for Torque