TECHNICAL SUPPORT

ZGBK primarily uses high-purity GCr15 (AISI 52100) vacuum-degassed chrome steel for standard applications. For corrosion-resistant requirements, we offer AISI 440C, 304, and 316 stainless steel options. All materials undergo rigorous metallurgical testing.

We offer bearings in ZV1, ZV2, ZV3, and ZV4 grades. ZV3 and ZV4 are our premium low-vibration series, ideal for high-speed electric motors and precision medical instruments.

Yes. We provide heat stabilization treatments ranging from S0 to S4, allowing our bearings to operate reliably in environments with temperatures up to 250°C without losing dimensional stability.

Absolutely. We provide comprehensive OEM/ODM services, including customized internal geometry, specialized lubricants, and private brand laser etching on the bearing rings and packaging.

For stocked items, we ship within 3–5 business days. For custom manufacturing orders, lead times typically range from 30 to 45 days depending on the technical complexity and quantity.

Our manufacturing center is fully ISO 9001:2015 certified. We also adhere to IATF 16949 standards for automotive-grade components and provide full Material Test Reports (MTR) upon request.

Yes. Every single bearing undergoes 100% automated inspection for vibration, noise, and dimensional accuracy before it is packed for shipment.