Deep groove ball bearing 6304DDU

Description

1. Product Overview

The Deep Groove Ball Bearing 6304DDU is a precision-engineered radial bearing designed for high-speed rotary applications where low friction, robust sealing, and long service life are critical. It is primarily used to support radial and light axial loads in electric motors, gearboxes, pumps, fans, conveyors, and industrial drives. The 6304DDU delivers consistent rotational accuracy, reduced maintenance through integrated double-lip rubber seals, and high reliability under continuous operation—making it a strategic component in uptime-critical manufacturing and process systems. Its combination of standardized dimensions, sealed protection, and cost-effective durability positions it as a preferred sourcing choice for industrial OEMs and MRO buyers seeking predictable lifecycle costs and simplified inventory management.

2. Key Specifications & Technical Characteristics

• Bearing designation: 6304DDU (single row deep groove ball bearing, double rubber-sealed on both sides)

• Standard: ISO/ABEC/GB dimensional compliance (interchangeable with common international standards)

• Material (rings & balls): Chrome steel (AISI 52100 / GCr15) or equivalent high-carbon chromium bearing steel

• Cage material: Pressed steel (standard) or nylon/polyamide (on request)

• Seals: Double lip NBR rubber seals (DDU) on both sides; metal-backed or reinforced variations available on request

• Internal clearance: C0 (standard) or C2/C3 options available per application requirement

• Hardness: Bearing raceway hardened to typical range of HRC 60–64 (industry standard)

• Load ratings (indicative, per standard catalog): Dynamic and static radial load ratings per ISO dimensioning (refer to technical sheet for exact N/kN values)

• Dimensional data: Bore 20 mm, Outer diameter 52 mm, Width 15 mm (standard 6304 dimensions)

• Surface finish: Ground raceways and precision-ground balls to ensure low vibration and noise

• Lubrication: Pre-lubricated with high-performance mineral or synthetic grease; relubrication intervals depend on operating conditions

• Temperature range: Typical continuous operating range -30°C to +120°C (seal and grease dependent; extended-range greases available)

• Corrosion protection: Standard bright finish; options for corrosion-resistant coatings (zinc plating, black oxide) or stainless-steel variants available for corrosive environments

• Packaging: Industrial bulk cartons, wooden crates, or palletized crates; individual bearing boxes with protective wrap for traceability and damage prevention

• Shelf life: Sealed and pre-lubricated bearings retain serviceable condition for 2–5 years under controlled storage; recommended inventory rotation and humidity-controlled storage

3. Core Industrial Applications

• Electric motors and generators: Supports high-speed shafts with low vibration; sealed design prevents lubricant loss and ingress of contaminants, extending motor life.

• Gearboxes and drives: Maintains concentricity and radial support under varying loads; low friction reduces energy losses and heat generation.

• Pumps and compressors: Sealed bearing reduces risk of fluid ingress; suitable for continuous duty pumps in water treatment, HVAC, and process plants.

• Fans, blowers, and conveyors: Reliable in continuous-operation environments; reduces downtime and maintenance needs for material handling and HVAC systems.

• Machine tools and automation: Precision radial support for spindles and rotary actuators where runout and noise control impact product quality.
  Why it outperforms alternatives: Standardized tolerances and precision manufacturing yield lower vibration and longer fatigue life versus generic or low-grade bearings. Double rubber seals and factory lubrication lower contamination-related failure modes versus open or shielded variants. Availability of clearance and cage options enables application-specific optimization for speed, load, or contamination profile.

4. Competitive Advantages

• Quality consistency: Manufactured to established international bearing standards with batch traceability and inspection records to ensure repeatable performance.

• Supply reliability: Stocked for bulk supply with predictable lead times and export-capable packaging; supported by scalable inventory for OEM rollouts.

• Logistics capability: Packaged and palletized for containerized export, with options for consolidated shipments and door-to-door freight coordination.

• Price competitiveness: Standardized design enables cost-effective mass production and competitive unit pricing at scale for 20 MT+ bulk orders.

• Sustainability: Long service intervals and reduced failure rates lower total lifecycle material and energy consumption; options for recyclable packaging and low-VOC lubricants.

• Technical support: Detailed product datasheets, CAD models, installation and relubrication guidance, and failure-analysis support available to industrial procurement and maintenance teams.

5. Commercial & Supply Information

• Minimum order quantity (MOQ): BULK 20MT

• Loading capacity: Specify packaging density; typical loading estimates for standard palletization: approximately 20 MT per 20-foot container (actual units per container depend on packaging configuration and pallet stacking).

• Lead time: Available from stock or manufactured-to-order; lead times depend on final quantity, surface treatment, and certification requests (confirm at inquiry).

• Certifications and documentation: Material certificates, dimensional inspection reports, and packing lists provided on request for bulk orders.