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Motors play a critical role in powering rock crushing equipment. To ensure smooth operations, boost productivity, and minimize costly downtime, regular motor maintenance is essential. The majority of motor failures can be attributed to two primary components: and . In this article, we’ll focus on bearing maintenance—a vital aspect of motor upkeep.

Why Bearings Fail and How to Prevent It

Bearing issues are the most common reason for motor failures, with inadequate being the leading cause. Anti-friction bearings, in particular, require consistent lubrication to operate smoothly and avoid failure. The re-lubrication frequency varies based on the motor’s operating environment, which we can categorize into three main conditions:

• Standard Conditions: 8 hours/day with light loads and a clean environment at around 104°F
• Severe Conditions: 24 hours/day with heavy loads, vibration, or exposure to dust at 104-122°F
• Extreme Conditions: High shock, vibration, and heavy dust exposure

Following a customized re-lubrication schedule based on these conditions is crucial to maintaining motor bearings and extending motor life. See the recommended schedule below:
Re-Lubrication Schedule:

Ball Bearings:

• Standard: Every 6 months
• Severe: Every 3 months
• Extreme: Every 2 months

Roller Bearings:

• Standard: Every 4 months
• Severe: Every 2 months
• Extreme: Every 1.5 months

Selecting the Right Grease for Bearing Lubrication

Proper grease selection is equally essential. Refer to the motor’s nameplate or manual for the recommended grease type. Mixing incompatible greases can lead to chemical reactions that deteriorate lubrication quality, often resulting in catastrophic bearing failure within hours. For those managing multiple motor types, consider maintaining a guide for grease compatibility to ensure optimal lubrication.

Protect Bearings from Contaminants

Aside from lubrication issues, bearing failures can also result from contamination. For motors operating in severe or extreme conditions, bearing seals—such as shaft slingers, contact seals, or non-contact seals—can significantly extend motor life by preventing the ingress of dirt, dust, or water.

Safety Reminder

When performing motor maintenance, wear appropriate safety gear, including safety shoes to protect against heavy objects. Ensure that shoes have oil-resistant soles for added protection in industrial environments.
For questions, contact our Service Department or call us at 800-634-5634.

With these tips, you’ll be well-equipped to keep your motors in top condition, maximizing performance and reducing costly downtime. Proper bearing care and a consistent maintenance schedule are the first steps toward more reliable operations and extended motor lifespan.Ìý Shop bearings online on our store today!