MENU EU/ENEU/EN Search NSK - Motion & Control

Introduction

A worldwide manufacturer of automotive components was having significant unplanned stoppages due to the failure of the Ball Screws in the Machining Center. This had a major effect on the manufacturing output resulting increased costs and reduced machine reliability. The average life of the Ball Screws was about 6 months. NSK analysed three of the failed Ball Screws to determinate the main reason of the failure. NSK's Technical Department developed a special design to improve all the technical characteristics, especially the high-performance sealing design. Two Ball Screws were installed in the most critical points in the plant. This was successful and led to a cost saving and reduced machine downtime and a massive increase in lifetime.

Key Facts

  • Machine centre with very arduous working conditions
  • Malfunction of the Ball Screws due to high loading and agressive environment
  • NSK Solution: High-performance seals and high-speed/high-load Ball Screws
  • Nut design Ball Screws to maintain better stiffness and improved quality
  • Increased lifetime by 6 times and still continue working
  • Reduced production downtime and material costs

Machining Centre Machining Centre
Ball Screw with High-performance X1 Seal Design Ball Screw with High-performance X1 Seal Design

Background Information

  • Sector: Automotive Production
  • Country: Spain
  • End-product: Break systems
  • Application: Machining Centre

  • Number of machines: 117 Ball Screws
  • Approx. Lifetime: 6 months
  • Problem: Production stop due to Ball Screws failures

Value Proposals

  • Plant survey to inspect the machine environment and working conditions by the NSK Engineers
  • Analyse three Ball Screws to observe the running paths and lubrication conditions

  • NSK Technical Department designed a special Ball Screw that could be assembled without any change from customer's side

Product Features

  • High-performance seal design to work in a hard environment
  • Decrease in the operating temperature and wear (precision and preload)
  • Increase of the lifespan, due to the greater load capacity and the lower preload per ball
  • Reduction of the torque required, due to a lower degree of preload, with a corresponding reduction of the energy consumption of the machine

  • K1 lubrication system included for reduced maintenance
  • Substantially longer grease life
  • Optimum lubrication even with high loads and hard operating conditions
  • No contamination of cutting/cooling liquid with grease

Cost Saving Breakdown

Before Cost p.a. NSK Solution Cost p.a.
Costs for Ball Screws x 2 machines € 8.400 Costs for Ball Screws x 2 machines € 4.000
Production costs: 6 hours/stop x 12 stops x 360 pieces/hour x 10€/piece € 259.200 No failures in 36 months € 0
4 hours for each Ball Screw x 50€/hour x 14 changes € 2.800 4 hours for each Ball Screw x 50€/hour x 2 changes € 400
Total Costs € 270.400 € 4.400

Reference: SS-E-7028

* To save as PDF select PDF as your print device

Contact Search

Please select your options to view your contact.

Your result

Cookies on the NSK website

We use cookies to ensure that we give you the best experience on our websites and web applications. We use cookies to ensure that we give you the best experience on our websites and web applications. By continuing without changing your browser settings, we assume you give your consent to receive cookies. However, you can change your browser cookie setting at any time.