What are the disadvantages of deep groove ball bearings?

Four Major Weaknesses of Deep Groove Ball Bearings

1. Vulnerable to "Forceful Pushing" (Weakness in Axial Force):

While strong in vertical pressure, it malfunctions under extreme axial pushing (like a jack) → ball bearings slip and derail → collapses within three days.
Remedy: Heavy axial loads necessitate the use of thrust bearings.

2. Vulnerable to "Crooked Neck" (Excessive Centering):

Even slight misalignment is unacceptable: Shaft/bore misalignment exceeding 0.5° (the thickness of a human hair) → ball bearings wear down the raceway on one side → abnormal noise + premature failure.
Comparison: Self-aligning bearings can tolerate 2° misalignment (like a oscillating fan), but this type of bearing is like a perfectionist.
Scene of Failure: Belt pulls the shaft crooked → bearing edge peels off → equipment vibrates like a tractor.

3. Vulnerable to "Running Wild" (Low-Speed ​​Ceiling):

It succumbs to high speeds: Above 15,000 RPM: Centrifugal force dries out the grease → raceway burns blue and smokes.
Beads fly around and hit the cage → shatter and jam.
Solution: Replace the high-speed electric spindle with a ceramic hybrid bearing (replace the beads with ceramic ones, making them too light to fly).

4. Afraid of "soaking" (a paper tiger of rust prevention)

Stainless steel isn't always stainless steel:
304 stainless steel in salt water → rusts through in six months (fishing boat wheel bearings ruined after seawater immersion).
Ordinary chrome steel in sweat → rusts in three weeks (gym equipment bearings squeaking).
Desperate solution: In strong acid or alkali environments, use all-plastic bearings or ceramic bearings.