Success Story
Industry: Power Transmission
Application: Gearboxes for Elevators
Cost Savings: $111,200
Introduction
An international manufacturer of elevator gearboxes was experiencing unscheduled failures on its product during operation. NSK investigated the bearings within the application and found that a complex and difficult to assemble bearing arrangement was causing the inconsistent and inadequate performance. NSK suggested a much simpler solution featuring a fully integrated bearing assembly unit. This two-row flanged bearing unit reduced the number of components, was easier to assemble and offered superior performance compared to the original assembly.
Key Facts
- Elevator gearbox manufacturer
- Irregular and unscheduled downtime
- Failures through complex and often incorrect assembly of bearings and components
- Need for greater performance and increased service life
- Testing of NSK flanged bearing units
- Approval of solution after successful testing
- Result: reduced downtime and maintenance work
- Elevator gearbox
- NSK flanged bearing unit
Value Proposals
- NSK’s investigation showed that problems arose during installation of the bearings
- NSK training of employees in the installation and removal of bearings
- Machine design consultancy proposed NSK integrated flanged bearing unit
- Reduction of assembly and maintenance cost
- Increased bearing performance and reliability
- Annual cost savings of approx $111,200
Product Features
- 40° contact angle for high axial forces
- Compact design
- Specially developed seal material for gear oil
- Negative operating clearance
- Lifetime lubrication
- Housing sealed by O-Ring
Cost Saving Breakdown
| Before | Cost p.a. | NSK Solution | Cost p.a. | |
|---|---|---|---|---|
| Bearing costs (incl. parts) Original Assembly |
$181,110 | Bearings Costs New NSK flanged bearings |
$243,777 | |
| Assembly costs (approx. 466h x $37.50/h) | $17,475 | Assembly costs (approx. 116h x $37.50/h) | $4,350 | |
| Maintenance Cost | $160, 742 | Maintenance Costs | $0 | |
| Total Costs | $359,327 | $248,127 | ||
Reference:SS-E-1001
