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Testing of cooperation between NSK bearings and shafts

Source: China Bearing Network Time: 2014-03-29

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The cooperation gap between the NSK bearing and the shaft must be suitable; in order to make the service life of the NSK bearing more durable; during the detection of the radial clearance of the NSK bearing, the following methods can be used:
First, the ruler detection method is about the NSK bearing with larger diameter; the gap is larger; it is intended to be directly detected with a narrower feeler gauge. For the NSK bearing with smaller diameter; the gap is smaller. The side of the NSK bearing is damaged. Gap; must be measured with a suitable thickness gauge.
Second, the pressure lead detection method using the pressure lead method to detect NSK bearing voids is more accurate than the feeler detection; but the cost is relatively high. The aluminum wire used for testing should be soft; the diameter is moderate; not too big or too. Noisy this paragraph 湎Pocket 1. 5~2 times; in practice, soft lead wire is usually used for testing.
The time of detection; first open the NSK bearing cover; select the appropriate diameter of the lead wire; cut it into 15~40 mm long section; place it on the journal and the upper and lower NSK bearing interface; cover the NSK bearing cover; Tighten the fixing bolts; then loosen the bolts; remove the NSK bearing cap; use a micrometer to check the thickness of the flattened wire; and find the average value of the NSK bearing top clearance.
If the headspace is too. Slightly thin (11) 峦呓岷 嫔 嫔 . .. If too large; then reduce the pad, scrape the ground or cast the tile from the head.
Adjustment of bearing bushing force: In order to avoid possible transition and axial movement of the bearing bush during operation; in addition to cooperating with interference and stop parts; bearing bush must also be pressed with NSK bearing cap; measuring method and measuring top gap method The same; the thickness of the soft lead wire is measured; the bearing bushing force can be calculated.
Usually, the bearing force of the bearing bush is between 0. 02 and 0. 04 mm. If the pressing force does not meet the specifications, it can be adjusted by increasing or decreasing the thickness of the gasket at the joint surface of the NSK bearing and the bearing housing; the back of the tile is not allowed to be padded.
In addition to ensuring radial clearance, the plain bearings should also ensure axial clearance. When detecting axial clearances; move the shaft to a pole orientation; then use a feeler gauge or dial gauge to measure the orientation of the shaft from one pole to the other. The amount of turbulence is the axial clearance. When the clearance of the sliding bearing does not conform to the rules; adjustment should be made. The split NSK bearing often uses a gasket to adjust the radial clearance.
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