Deep groove ball bearing 6304-ZZ

Description

1. Product Overview

The Deep Groove Ball Bearing 6304‑ZZ is a high-precision, sealed single‑row ball bearing engineered for radial load applications and moderate axial loads in both directions. Designed for heavy-duty industrial rotating equipment, it delivers low friction, extended service life, and reduced maintenance thanks to double‑metal shields (ZZ) that retain lubricant and exclude contaminants. Its key value proposition is predictable, long‑term performance under continuous operation, lowering total cost of ownership through reduced downtime and fewer replacements. Strategically, the 6304‑ZZ is a standardized, globally available component that simplifies sourcing, supports equipment uptime across manufacturing, material handling, and power transmission systems, and enables modular maintenance strategies.

2. Key Specifications & Technical Characteristics

• Bearing type: Deep groove single‑row ball bearing, shielded both sides (ZZ).

• Model designation: 6304‑ZZ (conforms to ISO/ABMA sizing standards).

• Bore diameter: 20 mm.

• Outer diameter: 52 mm.

• Width: 15 mm.

• Dynamic load rating (approx.): 12.0 kN (confirm with manufacturer datasheet for specific tolerance class).

• Static load rating (approx.): 6.6 kN (confirm with manufacturer datasheet for specific tolerance class).

• Material: High‑grade chrome steel (bearing steel, typically AISI 52100 / GCr15) for rings and balls.

• Hardness: Through‑hardened raceways and balls to industry standard (typically HRC 60–66; verify with supplier certificate).

• Cage: Pressed steel or polyamide options available depending on supply specification.

• Sealing: Double metal shields (ZZ) — non‑contact metal shields providing protection from coarse contaminants while retaining grease.

• Lubrication: Pre‑lubricated with high‑performance lithium or synthetic grease; relubrication intervals depend on operating conditions.

• Tolerance class: Standard P0 (others available on request: P6, P5).

• Operating temperature range: Typical -30°C to +120°C depending on grease and cage material (confirm for high‑temperature variants).

• Vibration/noise rating: Low noise, suitable for general industrial applications (check supplier noise spec sheet for dB levels).

• Surface finish & runout: Manufactured to standard radial runout and surface finish consistent with ISO bearing standards.

• Packaging: Individual sealed boxes, inner cartons, and export pallets; industrial bulk packaging available.

• Shelf life: Indefinite when stored in original, sealed packaging in a dry, temperature‑controlled environment; recommended storage <70% RH, 5–25°C.

3. Core Industrial Applications

• Primary industries: Heavy manufacturing, automotive assembly lines, electric motors, industrial fans and blowers, conveyors and material handling, pumps and compressors, agricultural machinery, and general power transmission systems.

• Specific operational use cases: Motor shafts and housings requiring low friction and long life; conveyor idlers and rolls supporting continuous operation; gearbox support bearings where axial misalignment is minimal; pump and blower shafts subject to radial loads with intermittent axial thrust.

• Performance advantages versus alternatives: The 6304‑ZZ’s sealed design reduces contamination ingress compared with open bearings, extending service intervals and lowering lifecycle maintenance costs. Compared with cheaper, unshielded or lower‑grade bearings, it offers superior hardness, load capacity, and dimensional stability, improving operational efficiency and reducing unplanned downtime. Its standardized size ensures interchangeability and rapid replacement across equipment fleets.

4. Competitive Advantages

• Quality consistency: Manufactured to ISO/ABMA standards with traceable material certificates and batch testing options to ensure uniform performance across orders.

• Supply reliability: Readily available global standardized SKU with scalable production capacity for bulk orders and predictable lead times to support MRO programs.

• Logistics capability: Packaged for secure export with palletization and container loading optimization; compatibility with JIT and vendor‑managed inventory models.

• Price competitiveness: Standardized geometry and high production volumes reduce unit cost, enabling favorable pricing at scale without compromising material quality.

• Sustainability: Long service life reduces replacement frequency and waste; bearings made from fully recyclable steel alloys. Options for lower‑emission supply chain and eco‑friendly greases on request.

• Technical support & documentation: Full technical datasheet, installation and handling guidelines, CAD models, bearing life calculation support, and failure‑analysis consultation available on request.

5. Commercial & Supply Information

• Minimum order quantity (MOQ): BULK 20 MT.

• Loading capacity (MT per container): Typical 20‑foot container capacity for packaged bearings (palletized and boxed) approximately 20 MT; 40‑foot container capacity approximately 24–26 MT. Exact loading depends on packing configuration and accessory packaging.

• Lead times: Available from stock for standard batches; bulk orders subject to production lead times—confirm at time of order.

• Terms: FOB/CIF/EXW negotiable; payment and delivery terms to be agreed per contract.

• Traceability: Batch and lot numbers supplied with each shipment; material certificates and QC reports available upon request.