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What is the clearance and how to measure the clearance of the rolling bearing?

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The so-called roll bearing clearance; is to fix a ferrule; the other ring has the maximum amount of motion along the radial or axial direction. The maximum amount of activity in the radial direction is called radial clearance; the maximum amount of activity along the axial direction is called Axial clearance. In general; the larger the radial clearance; the larger the axial clearance; and vice versa. According to the condition of the bearing; the clearance can be divided into the following three types:
1. The clearance of the original clearance bearing device in the free condition. The original clearance is determined by the processing and installation of the manufacturer.
Second, the device clearance is also called the cooperative clearance; it is the clearance of the bearing and the shaft and the bearing seat device without working. Because of the interference device; or the inner ring is enlarged; or the outer ring is contracted. The arch dam and the dam are still snails.
Third, the clearance of the working clearance bearing in the working condition; the inner ring temperature rises the most during operation; the thermal expansion is the largest; the bearing clearance is reduced. The endangered emperor 岢 岢 蜗 蜗 龃 龃 轴承 轴承 轴承 轴承 轴承 轴承 轴承 轴承 轴承 轴承 轴承 轴承 轴承 轴承 轴承 轴承 轴承 轴承 轴承 轴承 轴承 轴承.
Some tumbling bearings can't adjust the clearance; they can't be disassembled; there are six types of these bearings; 0000 to 5000, some tumbling bearings can adjust the clearance; but they can't be disassembled; there are 6000 (angular touch bearing) and inner Type 1000, 2000 and 3000 roll bearings with tapered bore; device clearance for these types of roll bearings; adjusted to be more than the original clearance. 涣硗猓 ┲岢 ┲岢 ┲岢 ┲岢 梢 梢 ┲岢There are three kinds of volute type 7000 (tapered roller bearing), 8000 type (thrust ball bearing) and 9000 type (thrust roller bearing); these three kinds of bearings do not have original clearance, 6000 type and 7000 type rolling bearings; Adjusted to the clearance. 嵯蛴 兑 兑 嬷湫 嗳唬 嗳唬 嗳唬 8000 8000 8000 and 9000 type rolling bearings; as long as the axial clearance has practical significance.
Appropriate device clearance helps to normalize the operation of the rolling bearing. The clearance is too long. The 龆岢 壬撸 壬撸 壬撸 薹ㄕ ぷ鳎 ぷ鳎 ぷ鳎 ぷ鳎 ぷ鳎 灾 灾 灾 蜗 蜗 蜗 蜗 蜗 蜗 蜗 蜗 蜗 蜗 蜗 蜗.
The radial clearance is viewed as follows:
First, the feeling of the law 1, the hand to change the bearing; the bearing should be smooth and sensitive without card 涩 representation.
2. Shake the outer ring of the bearing by hand; even if the radial clearance is only 0. 01mm; the axial movement of the uppermost point of the bearing; there are also 0. 10~0. 15 mm. This method is dedicated to single row radial ball bearings.
Second, the measurement method 1, with the feeler gauge; recognize the maximum load of the rolling bearing; between the 180 ° rolling body and the outer (inner) ring into the feeler gauge; the elastic thickness of the feeler gauge is the bearing radial Clearance. This method is widely used in self-aligning bearings and cylindrical roller bearings.
2. Use a dial gauge to check; first zero the dial gauge; then push up the outer ring of the rolling bearing; the dial gauge reading is the radial clearance of the bearing.
The way to view the axial clearance is as follows:
1. Feel the finger to check the axial clearance of the rolling bearing; this method is applied to the occasion where the shaft end is exposed. When the shaft end is closed or cannot be viewed with fingers for other reasons, it can be seen whether the shaft can be changed sensitively.
2, the measurement method (1) with a feeler gauge; the operation method is the same as using the feeler gauge to view the radial clearance; but the axial clearance should be c = λ / (2sinβ)
Where c axial clearance; mm,
λ feeler thickness; mm,
轴承 bearing cone angle; (°).
(2) View with a dial gauge; use the crowbar to move the axis so that the axis is at the two pole orientations; the difference between the dial gauge readings is the axial clearance of the bearing. However, the force applied to the crowbar should not be too large. Otherwise, the shell will be elastically deformed; even if it is very deformed, it can be boiled.

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