How do you calculate magnetization capacity?

Multiply magnets per pulse cycle by available cycles to get gross capacity, then multiply by uptime and first-pass yield. For 4 units x 480 cycles x 90% x 97% you get 1676.16 good units.

What is the difference between gross and good magnetization capacity?

Gross is the theoretical maximum, here 4 x 480 = 1920 units. Good capacity, 1676.16 units, is what survives after 192 units of downtime loss and about 51.84 units of yield loss.

What causes magnetization first-pass failures?

Undersaturated charge from insufficient pulse energy, poor fixture coupling, magnets not fully aligned during pressing, or a marginal coercivity grade. A charge below full saturation means the magnet fails its flux check and must be recharged or scrapped.

How do I increase magnetization throughput?

Raise uptime by cutting capacitor recharge and fixture-change time, increase magnets per pulse with multi-cavity fixtures if the coil energy supports it, and lift first-pass yield by verifying full saturation for the grade.

Why does a 90% uptime cost so many units?

Because it applies to the full gross of 1920, a 10% loss is 192 units before yield even enters. On a magnetizer, downtime is often the single largest capacity leak, which is why it is shown separately.

Is first-pass yield the same as magnetization pass rate?

Effectively yes here: it is the fraction of magnets that reach full saturation on the first pulse and pass the flux gauge. At 97% you lose about 51.84 units, small next to the downtime loss in this example.

Rare Earth Magnet & Motor Materials calculator

Magnetization Capacity Calculator

Magnetization capacity estimates how many fully magnetized, in-spec magnets a pulse magnetizer can deliver over a shift, after accounting for downtime and first-pass yield. In NdFeB production the final step charges the sintered and coated magnet to saturation with a capacitor-discharge pulse, and throughput here often gates shipment. Production planners and capacity engineers use it to size magnetizer fixtures, schedule orders and spot whether the bottleneck is machine availability or magnetization quality. It splits gross theoretical output from the good output you can actually promise, and quantifies how much is lost to downtime versus failed charge.

What this calculator does

Estimate magnetization capacity for rare earth magnet and motor materials using production-ready inputs so teams can confirm whether capacity can cover demand before committing the schedule.
Use it when magnetization capacity in rare earth magnet and motor materials is being asked to take on more work and you need to know if there is room.
It multiplies output per cycle by available cycles for gross capacity, then derates by uptime and first-pass yield to give good units.

Formula used

Gross magnetization capacity = magnetization capacity output per cycle × available magnetization capacity cycles
Good magnetization capacity = gross capacity × expected magnetization capacity uptime × expected magnetization capacity first-pass yield

Inputs explained

Magnets magnetized per pulse cycle:
Available magnetizer pulse cycles:
Expected magnetizer uptime:
Expected magnetization first-pass yield:

How to use the result

Use it for shift or line capacity planning, quoting delivery dates, or deciding whether adding fixtures or cutting downtime buys more throughput.
It assumes uptime and yield are independent and constant; in reality a marginal magnetizer both stops more and produces more weak charges, so losses can compound.

Current U.S. benchmarks

The producer price index for copper and brass mill shapes stands at 559.593 (BLS, May 2026), up 76.8% from a year earlier. Quotes priced off last quarter's material cost miss this move. Global copper trades at $13,484 per tonne (IMF via FRED, May 2026).
The U.S. has 5,397 electrical equipment and appliances establishments employing about 369,437 workers (Census County Business Patterns, 2023).

Common questions

How do you calculate magnetization capacity? Multiply magnets per pulse cycle by available cycles to get gross capacity, then multiply by uptime and first-pass yield. For 4 units x 480 cycles x 90% x 97% you get 1676.16 good units.
What is the difference between gross and good magnetization capacity? Gross is the theoretical maximum, here 4 x 480 = 1920 units. Good capacity, 1676.16 units, is what survives after 192 units of downtime loss and about 51.84 units of yield loss.
What causes magnetization first-pass failures? Undersaturated charge from insufficient pulse energy, poor fixture coupling, magnets not fully aligned during pressing, or a marginal coercivity grade. A charge below full saturation means the magnet fails its flux check and must be recharged or scrapped.
How do I increase magnetization throughput? Raise uptime by cutting capacitor recharge and fixture-change time, increase magnets per pulse with multi-cavity fixtures if the coil energy supports it, and lift first-pass yield by verifying full saturation for the grade.
Why does a 90% uptime cost so many units? Because it applies to the full gross of 1920, a 10% loss is 192 units before yield even enters. On a magnetizer, downtime is often the single largest capacity leak, which is why it is shown separately.

Last reviewed 2026-05-12.