How do you calculate accepted bearing-check capacity?

Multiply checks per cycle by available cycles for gross capacity, then multiply by station uptime and first-pass yield. With 2 checks x 30 cycles x 88% x 94%, accepted capacity is 49.632 checks.

What is the difference between gross and accepted capacity?

Gross is the theoretical maximum — 2 x 30 = 60 checks here. Accepted is what survives downtime and rework: uptime removes 7.2 checks and yield removes another 3.17, leaving 49.632 accepted checks.

How much capacity does station downtime cost?

At 88% uptime on 60 gross checks, downtime alone removes 7.2 checks of capacity. Raising uptime to 95% would recover most of that — uptime is usually the cheapest lever to pull.

What is a good first-pass yield for bearing checks?

On a well-run fan line, first-pass bearing-check yield should sit in the mid-90s; the 94% default is solid. Falling below 90% usually means inconsistent preload, contamination at assembly, or a miscalibrated vibration probe.

Why does first-pass yield matter if failed bearings get re-checked?

Re-checks consume cycles that could have served new units, so every point of lost yield shrinks effective throughput. Here the 6% yield loss costs 3.17 checks of capacity even before the rework time itself.

How do I increase accepted bearing-check capacity?

Add cycles or a second station, lift uptime by reducing jams and tooling changeover, or raise first-pass yield by fixing root causes of bearing failures. The biggest single gain here is uptime, which is costing 7.2 checks.

Industrial Fans, Blowers & Air Movement Equipment calculator

Bearing Load Calculator

Bearing Load capacity estimates how many fan-bearing inspections a check station can actually complete and pass, after accounting for downtime and first-pass yield. Reliability engineers and production planners on fan and blower lines use it to size the bearing-verification step — vibration, temperature, and clearance checks on the shaft bearings that most often limit a fan's service life. It matters because bearings are the number-one wear item on industrial fans, and a check station that looks like it has plenty of throughput on paper rarely does once uptime and rework are subtracted. The calculator separates gross capacity from the realistic accepted capacity so you can plan staffing and catch bottlenecks.

What this calculator does

Estimate accepted bearing load checks from checks per test cycle, available cycles, uptime, and first-pass bearing inspection yield.
Use it when planning bearing load, run-in, temperature, vibration, or shaft alignment checks for fan assemblies.
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.

Formula used

Gross bearing check capacity = bearing checks per cycle × available bearing check cycles
Accepted bearing check capacity = gross bearing check capacity × bearing check station uptime × first-pass bearing check yield

Inputs explained

Bearing checks per cycle:
Available bearing check cycles:
Bearing check station uptime:
First-pass bearing check yield:

How to use the result

Use it when planning or load-balancing the bearing-inspection station on a fan or blower production line.
It assumes uptime and yield are independent flat percentages; in practice a jammed station and a rework loop can interact, so treat the accepted figure as a planning ceiling.

Current U.S. benchmarks

Steel mill PPI stands at 348.53 (BLS, May 2026), up 6.7% from a year earlier. New factory orders are up 2.3% year over year (Census).

Common questions

How do you calculate accepted bearing-check capacity? Multiply checks per cycle by available cycles for gross capacity, then multiply by station uptime and first-pass yield. With 2 checks x 30 cycles x 88% x 94%, accepted capacity is 49.632 checks.
What is the difference between gross and accepted capacity? Gross is the theoretical maximum — 2 x 30 = 60 checks here. Accepted is what survives downtime and rework: uptime removes 7.2 checks and yield removes another 3.17, leaving 49.632 accepted checks.
How much capacity does station downtime cost? At 88% uptime on 60 gross checks, downtime alone removes 7.2 checks of capacity. Raising uptime to 95% would recover most of that — uptime is usually the cheapest lever to pull.
What is a good first-pass yield for bearing checks? On a well-run fan line, first-pass bearing-check yield should sit in the mid-90s; the 94% default is solid. Falling below 90% usually means inconsistent preload, contamination at assembly, or a miscalibrated vibration probe.
Why does first-pass yield matter if failed bearings get re-checked? Re-checks consume cycles that could have served new units, so every point of lost yield shrinks effective throughput. Here the 6% yield loss costs 3.17 checks of capacity even before the rework time itself.

Last reviewed 2026-05-12.