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Bearing Commissioning

Run-in and Commissioning Procedures for AXRY-NGS Bearings

Commissioning Procedure Overview

Commissioning of AXRY-NGS (NGS-SBI) bearings consists of two main phases that must be carried out in sequence:

1

Grease distribution run

Grease distribution run

Ensures the grease is evenly distributed within the bearing in preparation for high-speed operation. It uses alternating CW/CCW rotation with cooling pauses.

2

Limiting speed run

Limiting speed run

A ten-step progressive acceleration program that safely brings the bearing up to its limiting speed nG.

Important Notice

A correct commissioning procedure is essential to achieve optimal bearing performance. The grease distribution run must be completed before proceeding to the limiting speed run.

1 Grease distribution run

The grease distribution run for AXRY-NGS (NGS-SBI) bearings is substantially longer than for standard NGX/EX bearings, and is adapted according to the following factors:

  • Lubrication system
  • Lubricant
  • Limiting speed

An even grease distribution across the bearing is mandatory before operating at elevated speeds.

The grease distribution run incorporates alternating rotational directions (CW/CCW) with variable duty cycles and cooling pauses, until the limiting speed nG is reached.

Official Recommended Diagram

The procedure recommended by myonic is shown in the diagram below (SVG). The specific number of stages, the duration of each step and the speed allocation should be taken from the diagram:

Recommended grease distribution run diagram (myonic official)
myonic official recommended diagram (source: product-myonic.com/wp-content/uploads/2022/07/Schaubild_tabellen-1.svg)
Legend
  • CW: clockwise rotation
  • CCW: counter-clockwise rotation
  • Cooling pause: cooling interval (shaded blocks in the diagram indicate a pause for cooling)
  • nG: limiting speed of the axis

2 Limiting speed run

Once grease distribution is complete, follow the ten-step progressive acceleration program. Each step lasts at least 60 minutes:

Column descriptions
  • Step: commissioning step number, 10 steps in total
  • Speed: expressed as a multiple of the limiting speed nG
  • Minimum duration: minimum run time per step
Step Speed Minimum Duration
10.1 × nG≥ 60 min
20.2 × nG≥ 60 min
30.3 × nG≥ 60 min
40.4 × nG≥ 60 min
50.5 × nG≥ 60 min
60.6 × nG≥ 60 min
70.7 × nG≥ 60 min
80.8 × nG≥ 60 min
90.9 × nG≥ 60 min
101.0 × nG≥ 60 min

nG = limiting speed of the axis; total time at least 600 minutes (10 hours)

Temperature Monitoring Requirements

Temperature monitoring is essential for both commissioning phases:

Maximum Temperature Limit

60°C

Upper limit of the sensor temperature measured in the sensor bore

Cooling Target Temperature

21°C ± 1K

Cool the bearing to this temperature before the start of each step and between steps

Sending Results After Completion

Upon finishing the limiting speed run, please share your test results with myonic for confirmation:

"Based on your test results myonic will check if everything is O.K. Should you have any questions or problems, please contact myonic application engineering."

(After completing the limiting speed run, please send the test results to sales@eb-system.com and we will help confirm whether the results are in order.)

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