Industrial Fans, Blowers & Air Movement Equipment worked example

Bearing Load at 99% bearing check station uptime: a worked example

Push bearing check station uptime up to 99% and the picture changes. This example computes every intermediate figure at that operating point. Use it when planning bearing load, run-in, temperature, vibration, or shaft alignment checks for fan assemblies.

The inputs for this scenario

  • Bearing checks per cycle: 2 checks / cycle (unchanged)
  • Available bearing check cycles: 30 cycles (unchanged)
  • Bearing check station uptime: 99 % (raised for this scenario; the documented default is 88)
  • First-pass bearing check yield: 94 % (unchanged)

Working through the calculation

  • Applying the documented formula (Gross bearing check capacity = bearing checks per cycle × available bearing check cycles) to the inputs above produces each figure below.
  • At this operating point the engine returns 55.84 loads for accepted bearing check capacity, the number this scenario is built around.
  • At this operating point the engine returns 60 loads for gross bearing check capacity.
  • At this operating point the engine returns 0.6 loads for bearing check station downtime loss.
  • At this operating point the engine returns 3.56 loads for first-pass bearing check yield loss.

How this compares with the baseline

  • Against the tool's baseline example, where bearing check station uptime sits at 88% and the headline result is 49.63 loads, this scenario comes in 12.5% above the baseline at 55.84 loads.
  • It computes gross bearing-check capacity (checks per cycle x available cycles) then derates it by station uptime and first-pass yield to give accepted capacity. The value of this scenario is the size of the gap it exposes: that gap, priced out over a year, is the budget you can justify spending to close it.

Results at a glance

  • Accepted bearing check capacity: 55.84 loads (headline result)
  • Gross bearing check capacity: 60 loads
  • Bearing check station downtime loss: 0.6 loads
  • First-pass bearing check yield loss: 3.56 loads

Run it with your numbers

  • Every input above is editable in the live Bearing Load calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.