NSK tapered hole bearing device considerations

Source: Bearing network time: 2014-10-05

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Whether the bearing device is correct or not; directly affects the accuracy, life and function of the bearing. Therefore, the device for drawing and the device part should be fully studied; according to the work specification. The operation specification items are usually as follows:
Clear the bearing and associated parts to check the dimensions and accuracy of the associated parts. Check the filling device after the bearing device is installed. It is expected to be in the device; then turn the bearing package. Usually the grease is smooth; the bearing is not removed; the smooth grease is directly filled. The oil is smooth. Usually; there is usually no need to remove; however; instruments or high-speed bearings; etc.; to be cleaned with clean oil; remove the rust inhibitor coated on the bearing. Remove the bearing of the rust inhibitor; easy to rust; Feel free to place.
Furthermore; bearings that have been sealed with smooth grease; do not clear directly.
Bearing device method; due to bearing layout, cooperation, conditions; because usually the shaft is rotated; so the inner ring needs to cooperate with the cooperation. Cylindrical hole bearing; multi-purpose press press; or hot-packing method. Cone hole occasion; Directly fixed on the tapered shaft; or with a tight sleeve device.
When the device is to the bearing seat; use the gap cooperation; when the outer ring has the interference; usually press with the press; or use the cooling method of the cooling device. Use dry ice as the coolant; cold shrink device; in the air The moisture will condense on the outer surface of the bearing. Therefore, it is necessary to adopt the anti-rust method.
Conical hole bearing device
The tapered bore bearing directly fixes the inner ring to the tapered shaft or may use the adapter sleeve to disassemble the sleeve device onto the cylindrical shaft (see Figures 4 and 5).
Large-scale spherical roller bearing multi-purpose hydraulic device; Figure 6 is the use of hydraulic nut pressed into the adapter device. Figure 7 is to set the oil hole on the adapter sleeve; while the high-pressure oil is sent to the cooperation surface; The method of pressing into the tight sleeve device.
Refer to Table 1. Check the reduction of the radial clearance; perform the device. Use the feeler to measure the clearance; measure the clearance between the two columns together; the value should be flat at all.
The scale of the bearing increases; when the device is on the shaft; the elliptical deformation occurs due to the outer ring of the self-weight; if the clearance is measured at the lowermost part of the deformed bearing; the measured number will be larger than the practice clearance; the radial clearance with this fault; According to the general specification of Table 1, the interference will be too large; or the actual device clearance is too small. Therefore, as shown in Figure 9; the horizontal two lateral clearances a, b and the lowermost clearance Half of the sum of c as a play.
When the self-aligning ball bearing is used to fix the sleeve device to the shaft; make sure that the outer ring can be sensitive and aligning; the clearance behind the device should not be too small.

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