Identifying Differences via Structural Features
The front and back sides of a spring washer are much like the two sides of a coin; a careful examination will reveal the differences:
Bevel Orientation: Most washers feature a bevel on one side; the raised face typically points toward the nut.
Gap Direction: When the open ends of the washer face outward, the bevel naturally forms an upward-sloping angle.
Surface Finish: For some products, a rust-resistant coating or treated surface serves as the visual indicator for the "front" side.
Hands-On Testing for Greater Reliability
When visual inspection alone proves difficult, try these methods:
Compression Test: When placed in the correct orientation, pressing down on the washer will elicit elastic resistance; if placed upside down, it will tend to collapse easily.
Rotation Test: Once installed in the correct orientation, manually rotating the nut should produce a faint "click" sound.
Thickness Comparison: Using a caliper to measure, you will often find that the beveled side is 0.1 to 0.3 mm thinner than the flat side.
Installation Tips to Prevent Errors
Keep these practical pointers in mind:
Ensure the open ends of the washer face toward the direction of the applied load.
After installation, verify that effective tension has been established.
When used in combination with a flat washer, the spring washer should 'always' be positioned directly against the nut.
Before reusing a washer, check to ensure its elastic resilience remains within acceptable standards.
