Success Story
Industry: Quarrying, Mining & Construction
Application: Vibrating Drum
Cost Savings: € 2 970
Introduction
A company related to the Quarry & Mining industry was having frequent reliability problems with the bearing units assembled in a vibrating drum. These bearings worked under severe environments and were exposed to large amounts of sand, which often covered the units completely. Due to the nature of the application and its difficult access, the regularity and increasing cost of maintenance was an issue.
- Vibrating Drum
- Self-Lube
Key Facts
- Vibrating Drum
- Harsh environment, exposed to sand
- Regular failures with difficult replacement led to high cost of maintenance
- NSK Solution: Self-Lube housings with Triple Lip Seal Supports - ideal for remote applications
- Increased life-time by 10 times
- Cost Saving generated
Value Proposals
- NSK Engineers visited the site to assess the application
- Failed Bearing Analysis showed that fine sand particles were entering the bearing causing early failure
- A trial of Self-Lube triple lip sealed bearings resulted in life improvements 10 times than before
Product Features
- Three high integrity nitrile seal lips with lubrication traps to stop ingress of contaminates
- High strength steel outer case resists impact to seal and provides a primary dust trap
- Available for both setscrew and eccentric locking collar inserts options
- Large size range offered, including imperial options
- Inserts interchangeable with standard items
- Longer bearing life through superior seal performance
- Extended re-lubrication intervals, greatly reducing maintenance costs and increased productivity of machinery
- Simple implementation; ready replacement for existing bearing units
- Mounting on the shaft with balled setscrews, providing much greater resistance to loosening
Cost Saving Breakdown
| Before | Cost p.a. | NSK Solution | Cost p.a. | |
|---|---|---|---|---|
| Engineering Costs: Replacement per year × No. of engineers × €30/hr | €360 | Engineering Costs: Less than 1 replacement per year × No engineers × hours × €30/hr | €36 | |
| Costs of lost production: Downtime costs: 70ton/hr × 7€/ton × hours × No. of replacement per year | €2.940 | Costs of lost production: Downtime costs: 70ton/hr × 7€/ton × hours × No. replacements per year | €294 | |
| Costs of lost production: Bearing Life: 2 months approximately (440hrs) | €0 | Costs of lost production: Bearing Life: 19 months approximately (4.400hrs) | €0 | |
| Total Costs | € 3 300 | € 330 | ||
Reference:SS-E-7023
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