With the widespread use of NTN Bearing, select and use techniques and other technical issues NTN Bearing also getting attention by everyone, cautions NTN Bearing selection and use of selected bearings NTN bearings rolling when the outline of the kind, type and size are varied. For the mechanical device to play the expected performance, choose the most appropriate bearing is critical. NTN Bearing selected, you need to analyze a lot of reasons, studies from all angles, the evaluation procedures for selecting NTN bearings, no special specifications, but generally the following order:
(1) Have conditional use mechanical means and NTN bearings, etc.
(2) a clear requirement for NTN Bearing
(3) Type of selected NTN Bearing
(4) the selected configuration NTN Bearing
(5) Selected NTN Bearing Size
(6) Selected NTN Bearing Specifications
(7) NTN Bearing installation method selected
NTN bearing is installed after the conclusion of the hosts, as measured radially spindle runout, measured values ​​can be found in each of its turn has some changes; continuous measurements can be found after after a certain number of revolutions, this change will be approximately repeated. This change in the index to measure the degree of circular rotation accuracy, approximately repeated changes in the number of revolutions required for precision rotation cycle on behalf of the "quasi-periodic", the magnitude of change in the quasi-periodic large amplitude, rotation accuracy is poor circulation ʱ??
If properly pre-load on the spindle, the speed gradually decline to close to the speed the obligation to implement NTN Bearing "run" effect, can improve the accuracy of the spindle rotation cycle.



Recommended NTN Bearing Part models are as follows:

32720 NTN 6834 Bearing 61834 1000834 170 215 22 6834 NTN deep groove ball bearings deep groove ball bearings (60000 type)
32721 NTN 6836 Bearing 61836 1000836 180 225 22 6836 NTN deep groove ball bearings deep groove ball bearings (60000 type)
32722 NTN 6838 Bearing 61838 1000838 190 240 24 6838 NTN deep groove ball bearings deep groove ball bearings (60000 type)
32723 NTN 6840 Bearing 61840 1000840 200 250 24 6840 NTN deep groove ball bearings deep groove ball bearings (60000 type)
32724 NTN 6844 Bearing 61844 1000844 220 270 24 6844 NTN deep groove ball bearings deep groove ball bearings (60000 type)
32725 NTN 6848B bearings 61848 1000848 240 300 28 6848B NTN deep groove ball bearings deep groove ball bearings (60000 type)
32726 NTN 6852B bearings 61852 1000852 260 320 28 6852B NTN deep groove ball bearings deep groove ball bearings (60000 type)
32727 NTN 6856 Bearing 61856 1000856 280 350 33 6856 NTN deep groove ball bearings deep groove ball bearings (60000 type)
32728 NTN 6860 Bearing 61860 1000860 300 380 38 6860 NTN deep groove ball bearings deep groove ball bearings (60000 type)
32729 NTN 6864 Bearing 61864 1000864 320 400 38 6864 NTN deep groove ball bearings deep groove ball bearings (60000 type)
32730 NTN 6868 Bearing 61868 1000868 340 420 38 6868 NTN deep groove ball bearings deep groove ball bearings (60000 type)

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