Using a feeler gauge on a bearing is typically done to measure its internal clearance, which is the small amount of play or movement within the bearing components. For a specific procedure on a double-row bearing, you measure the radial clearance by inserting the feeler gauge between the rolling elements.
Measuring Bearing Radial Clearance
Radial clearance is the maximum distance that one ring of a bearing can be moved radially (perpendicular to the axis) in relation to the other ring when the bearing is not under load. Feeler gauges are a common tool used for this measurement, especially in certain types of bearings or during specific inspection procedures.
Procedure for Double-Row Bearings
According to standard practices for measuring radial clearance in a double-row bearing, the procedure involves specific positioning of the bearing elements to ensure an accurate reading.
Here are the steps based on the reference provided:
- Position the Rolling Elements: Arrange the rolling elements of the double-row bearing carefully. Ensure that one element in each row is positioned at the top of the bearing.
- Symmetrical Arrangement: The remaining rolling elements should be arranged symmetrically with respect to the bearing center. This ensures the load is distributed, allowing for accurate measurement of the clearance.
- Insert Feeler Gauges: Insert the feeler gauges between the rolling elements where the clearance is being measured. You will typically try different gauge thicknesses until you find the largest one that fits snugly without forcing it.
- Measure Clearance: Measure the respective radial clearances. This is typically done at various points around the bearing circumference or as specified by the bearing manufacturer's instructions. The thickness of the largest feeler gauge that can be inserted represents the radial clearance at that point.
(Note: The reference mentions figure 4, which illustrates this measurement process. Without the figure, follow the textual description closely.)
Importance of Radial Clearance
The correct radial clearance is crucial for a bearing's performance and lifespan.
- Too Little Clearance: Can lead to excessive heat generation, reduced lubricant film thickness, and premature failure due to increased stress.
- Too Much Clearance: Can result in imprecise shaft guidance, increased noise and vibration, and potential damage under load.
Measuring clearance with feeler gauges, following procedures like the one described for double-row bearings, helps assess the bearing's condition and ensure it meets the required specifications for its application.
