Success Story
Industry: Power Transmission
Application: Gearboxes for Elevators
Cost Savings: € 103 750
Introduction
An international manufacturer of elevator gearboxes was experiencing irregular and unscheduled stoppages of its product during operation. NSK investigated the problem and found out that there was a complex and difficult to assemble bearing arrangement resulting in inconsistent performance. NSK implemented through its machine design consultancy service 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, gave superior performance and had the benefit of supplier rationalisation.
- Elevator gearbox
- NSK flanged bearing unit
Key Facts
- Gearbox manufacturer
- Gearboxes for elevators
- Irregular and unscheduled stoppages
- Failures through complex and often incorrect assembly of bearings and components
- Demand for greater performance and extended service life
- Trials with NSK flanged bearing units
- Approval of solution after successful trial
- Result: reduction of assembly costs and staff deployment
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 costs and staff deployment
- Great improvement in the bearing performance and reliability
- Cost savings of approx. €103.750 per annum
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: Bearing costs (incl. parts) | €169.000 | Bearing Costs: Costs of flanged bearings | €227.500 | |
| Engineering Costs: Assembly costs (approx. 466h x 35€/h) | €16.333 | Engineering Costs: Assembly costs (approx. 116h x 35€/h) | €4.083 | |
| Engineering Costs: Personnel required to replace bearings | €150.000 | Engineering Costs: Personnel required to replace bearings | €0 | |
| Total Costs | € 335 333 | € 231 583 | ||
Reference:SS-E-1001
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