Success Story
Industry: Automotive
Application: CNC Spindle
Cost Savings: € 32 880
Introduction
Within a big Automotive production plant the machine tool spindles often broke down due to spindle failures. The maintenance department of the production plant had to change the bearings every 2 weeks. The customer requested NSK to investigate the root cause of this bearing failure. After a survery of the complete application and the maintenance process the NSK engineers discovered that the main problem was incorrect handling of Super Precision Bearings during installation.
- Automotive Production - CNC Spindle
- Mounting training for Super Precision Bearings
Key Facts
- Machine Tool Spindle
- Incorrect handling of the bearings during maintanance
- NSK Solution: Super Precision Bearing training - mounting & dismounting
- Significant cost savings due to increased lifetime of the bearings up to 6 months
Value Proposals
- An NSK expert checked the complete mounting and dismounting process of the maintenance departement
- It has been recognised that the bearing failed due to incorrect handling during installation
- A complete training with the maintenance people including advise on grease refilling of bearings was done
- No further issues were detected on the bearings, after the installation process was clear
Product Features
- Optimum design - achieved by computer simulation of temperature rise resulting from ball skid
- Long life - Range of material specification including high quality ultra clean steel, extra pure and advanced material SHX patented by NSK
- High accuracy - Rolling elements with P2 series available in standard steel and ceramic material
- Low Noise - Quieter running high-speed spindle
- Cage material options, available in high speed design including - brass, engineered polymer and phenolic
- Optional seals available within the standard ISO envelope
- High rotational speed
- Minimum friction and heat generation
- Controlled rigidity
Cost Saving Breakdown
| Before | Cost p.a. | NSK Solution | Cost p.a. | |
|---|---|---|---|---|
| Bearing Costs: Bearing failure every 2 weeks | € 20.120 | Bearing Costs: 2 Bearing changes per year | € 160 | |
| Engineering Costs: Replacement of bearings | € 1.920 | Engineering Costs: Replacement cost for bearings per year | € 1.000 | |
| Costs of lost production: Machining downtime x 24 | € 12.000 | Costs of lost production: No downtime | € 0 | |
| Total Costs | € 34 040 | € 1 160 | ||
Reference:SS-E-5005
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