PRLD / deep groove ball bearing 6204 tolerance class P5

Preload

Tighten until it stops wobbling. Then a little more, and you break it.

scroll to disassemble
01 — the bench

Two scales
pulling apart

The slider seats the races. Runout falls. Friction climbs. There is no perfect value, only a window, and you can watch both edges of it.

Runout
18.8µm
Friction torque
0.18N·m
Stiffness
12N/µm
Zero preload. The races are not seated and the shaft wanders.
02 — why it exists

A number set
by feel

There is always clearance between the races and the balls. While it is there the shaft wanders, and precision goes with it. Preload is when you seat the races in advance, before any working load arrives.

Sounds like a free win. But a seated ball rolls harder: friction climbs, the bearing heats, service life drops. So preload is never "more", it is exactly enough.

Machinists set it by feel, by hand, by the sound. It is computable, and it has been for decades. Nobody bothered to make it look like anything.

03 — how to read it
QuantityIn spec
Runouthow far the axis wanders per revolution< 5 µm
Friction torquehow much goes out as heat< 1.05 N·m
Stiffnessresistance to displacement under load> 60 N/µm
Preloadset at assembly, everything else follows8–18 µm
04 — supply

Planned
before launch

AllocationShare
Liquidityplanned liquidity allocation; lock pending85%
Treasuryplanned multisig; setup pending10%
Developerplanned: 6 mo lock, then 18 mo linear vest5%
05 — straight

The token has not launched. The proposed developer allocation is 5%, with a planned 6-month lock followed by 18 months of linear vesting. These are plans, not verified on-chain arrangements. Contract, liquidity lock and vesting evidence are pending publication.

This project promises no returns and makes no price predictions. No ownership, income or redemption rights are promised. You can lose everything you put in.

The bench runs on reference curves for a 6204. It illustrates the relationship. It is not an assembly calculation.

$PRLD / launch status Awaiting launch

Good things
take precision.

$PRLD has not launched yet. The official contract address and network will appear here after release.

CONTRACT ADDRESSNot published yet

There is no official purchase link yet. Follow our X account for launch updates.

Follow @prld_tools