Quality & Sourcing

OUR SOURCING PROCESS

Four steps between your inquiry and our quote.

1

Spec confirmation

We check the part number against dimensions, tolerance, seal, clearance and material. If anything is unclear, we ask — we don't guess.

2

Supply verification

We confirm whether the bearing is in-house production, partner supply, or needs custom manufacturing. No "in stock" claims without verification.

3

Quote with lead time

You get a formal quotation with a realistic lead time — not a placeholder. The quote is based on confirmed supply, not a sales target.

4

Inspection & shipment

Before shipping, bearings are inspected for the parameters that matter for your application. Inspection data available on request.

NLHB in-house bearing raceway ultra-precision super-finishing workshop

IN-HOUSE INSPECTION

What we actually measure.

These aren't marketing claims. These are the parameters our inspection equipment measures, per batch, on real bearings.

Geometry & dimensions

Bore diameter (d) — tolerance per ABEC / ISO class

Outer diameter (D) — tolerance per ABEC / ISO class

Width (B) — tolerance band

Raceway roundness — measured on roundness tester

Radial / axial runout

Surface & finish

Raceway roughness (Ra) — surface profilometer

Ball surface quality

Cage integrity and clearance after assembly

Seal / shield fit and drag torque

Visual inspection for cracks, corrosion, handling damage

Performance

Noise / vibration level (ANDERON or equivalent)

Radial clearance (C2 / C3 / C4)

Starting torque

Low-speed rotation test

Optional: life test for critical applications

Material & traceability

Steel grade verification (GCr15 / stainless)

Heat treatment hardness (HRC)

Batch traceability from raw material to shipment

Material certificate available on request

Heat number recorded per batch

Raceway profile inspection — finished rings

Roundness tester measuring bearing ring geometry — Roundness measurement — per batch

Bearing cold soak test at minus 55 degrees Celsius — Cold soak test — −55 °C, for low-temperature applications

S910 bearing vibration tester used for finished bearing inspection — S910 vibration tester — finished bearing inspection

Finished bearing mounted on an S910 vibration testing fixture — Bearing on S910 test fixture — close-up

Not every parameter is measured on every bearing of every order — that would be impractical. But every parameter above is measurable on our equipment, and we measure the ones that matter for your application. Ask us what we can provide for your specific order.

TESTING & VALIDATION