6300 Series Deep Groove Ball Bearings Manufacturer
Medium-series deep groove ball bearings engineered for higher radial load capacity, stable rotation, and reliable performance in electric motors, pumps, gearboxes, and heavy industrial machinery.
- Open, ZZ, 2RS & C3 Options
- Bore Sizes from 10 mm to 90 mm+
- Low Noise & Stable Running
- 4–8 Weeks Delivery
20+
Years Manufacturing
400+
Skilled Employees
100
Production Lines
P2/P4/P5
Precision Options
Quick Engineering Overview of 6300 Series Bearings
Essential technical characteristics for engineers and procurement teams.
Bearing Type
Single row deep groove radial ball bearing, featuring a robust medium series design for enhanced durability.
Load Direction
Designed primarily for substantial radial loads, while capable of supporting moderate axial loads in both directions.
Common Closures
Available in Open for external lubrication, ZZ / 2Z metal shielded, and 2RS rubber sealed designs for contamination resistance.
Typical Applications
Widely utilized in electric motors, industrial pumps, heavy-duty gearboxes, conveyors, and agricultural machinery.
Need help confirming 6300, 6305, 6308 or 6310 dimensions for your project?
Manufactured by Haron Bearing — Built for Stable OEM Supply
Haron Bearing has supplied precision bearings since 2000, supported by 400+ employees, 100 advanced production lines, experienced QC teams, and flexible OEM / ODM capability. We help industrial buyers source stable 6300 series bearings with reliable quality, controlled lead time, and application-based selection support.
What Are 6300 Series Deep Groove Ball Bearings?
6300 series deep groove ball bearings are medium-series single row radial ball bearings with a wider cross-section than 6000 and 6200 series bearings. They are commonly selected when the application needs higher radial load capacity, stable running, and standard metric interchangeability.
- The "63" series indicates a medium-duty deep groove ball bearing structure designed for robust performance.
- Compared with 6000 and 6200 series bearings, the 6300 series usually has a larger outside diameter (D) and wider width (B) for the exact same bore size (d).
- It is highly suitable for machinery where load capacity and long-term durability are prioritized over compact housing size.
- Common manufacturing suffixes include Open (no seals), ZZ / 2Z (metal shields), 2RS (rubber contact seals), C3 (internal clearance), NR (snap ring), and specialized high-temperature grease options.
6300 Series Deep Groove Ball Bearing Dimensions
Select standard 6300 series sizes below, or send your drawing for custom clearance, seal, grease, tolerance, and packaging requirements.
| Model | Bore d (mm) | Outer Dia D (mm) | Width B (mm) | Common Closures |
|---|---|---|---|---|
| 6300 | 10 | 35 | 11 | Open / ZZ / 2RS |
| 6301 | 12 | 37 | 12 | Open / ZZ / 2RS |
| 6302 | 15 | 42 | 13 | Open / ZZ / 2RS |
| 6303 | 17 | 47 | 14 | Open / ZZ / 2RS / C3 |
| 6304 | 20 | 52 | 15 | Open / ZZ / 2RS / C3 |
| 6305 | 25 | 62 | 17 | Open / ZZ / 2RS / C3 |
| 6306 | 30 | 72 | 19 | Open / ZZ / 2RS / C3 |
| 6307 | 35 | 80 | 21 | Open / ZZ / 2RS / C3 |
| 6308 | 40 | 90 | 23 | Open / ZZ / 2RS / C3 |
| 6309 | 45 | 100 | 25 | Open / ZZ / 2RS / C3 |
| 6310 | 50 | 110 | 27 | Open / ZZ / 2RS / C3 |
* Dimensions are standard references. Final load rating, clearance, tolerance, grease, and sealing design should be confirmed according to working speed, load, temperature, and environment.
6300 Series Bearing Options We Manufacture
Open 6300 Series Bearings
Engineered for applications with external lubrication systems or clean operating environments. The open design allows for unrestricted lubricant flow and rapid heat dissipation.
- Optimized for external oil or oil-bath lubrication systems.
- Minimal friction design enabling ultra-high-speed operations.
- Facilitates easy visual inspection and maintenance in clean environments.
- Manufactured to P6/P5 precision classes for enhanced rotational stability.
6300 ZZ / 2Z Shielded Bearings
Equipped with non-contact metal shields on both sides. These bearings strike the perfect balance between retaining high-quality grease and maintaining low friction for moderate to high speeds.
- Dual metal shields prevent the ingress of larger solid contaminants.
- Pre-lubricated with premium grease for lifetime, maintenance-free operation.
- Non-contact sealing ensures minimal friction and excellent high-speed capacity.
- Superior thermal endurance for continuous industrial manufacturing applications.
6300 2RS Sealed Bearings
Designed for harsh environments. Rubber contact seals offer maximum protection against dust, dirt, and moisture, making them essential for outdoor or heavy-duty machinery.
- NBR rubber contact seals provide superior waterproof and dustproof performance.
- Optimal grease retention significantly extends operational lifespan in harsh conditions.
- Ideal for electric motors, agricultural machinery, and fluid handling pumps.
- Available in high-temperature seal variants (Viton/FKM) for specialized applications.
6300 C3 Clearance Bearings
Engineered with extra internal radial clearance. This specific design accommodates thermal expansion and structural deformation, ensuring reliability under extreme operational stress.
- Increased radial internal clearance to safely accommodate thermal expansion.
- Effectively prevents bearing seizure during high-temperature or high-speed operations.
- Perfectly suited for tight interference fits on heavy-duty shafts or housings.
- Reduces structural vibration and operational noise under heavy thermal loads.
Low Noise 6300 Bearings
Precision-engineered for acoustic excellence. These bearings feature ultra-smooth raceway geometry and specialized lubrication to drastically cut down vibration and operational decibels.
- Precision-honed raceways deliver an exceptionally smooth and quiet operation.
- Strictly tested to meet stringent Z2, Z3, or Z4 acoustic and vibration standards.
- Filled with advanced low-noise polyurea grease to minimize rotational friction.
- The preferred choice for home appliances, HVAC fans, and precision electric motors.
OEM Customized 6300 Bearings
Comprehensive customization capabilities designed for bulk procurement. We tailor every aspect of the bearing to perfectly align with your specific application requirements and brand identity.
- Customizable cage materials including high-strength steel, brass, and polyamide (Nylon).
- Tailored lubrication solutions for extreme temperature, high speed, or food-grade needs.
- Private labeling, custom laser marking, and specialized bulk packaging options.
- Dedicated engineering support from prototype drawing review to mass production.
6300 vs 6000 vs 6200 Series Deep Groove Ball Bearings
Use this comparison to help buyers understand when the medium-duty 6300 series is a better choice for equipment design.
| Series | Cross-Section | Load Capacity | Space Req. | Best For |
|---|---|---|---|---|
| 6000 Series | Light / compact | Lower | Smallest | Compact motors, fans, light-duty equipment |
| 6200 Series | Medium-light | Medium | Moderate | General motors, pumps, automation equipment |
| 6300 Series | Medium / wider | Higher | Larger | Gearboxes, pumps, conveyors, heavier radial loads |
Conclusion: Choose 6300 series bearings when the application has enough mounting space and requires higher radial load capacity than 6000 or 6200 series bearings to ensure longer service life under heavy duty.
Common Problems When Choosing 6300 Series Bearings
Premature Failure Under Radial Load
Using a lighter bearing series (like 6000) in heavy-duty equipment to save space often leads to short service life, overheating, or raceway spalling. 6300 series solves this with a wider cross-section.
Wrong Clearance Causes Heat or Noise
Improper CN standard vs C3 clearance selection for tight press fits or high-temperature environments can increase vibration, noise, or cause catastrophic seizure during operation.
Seal Selection Does Not Match Environment
Open bearings fail quickly in dusty/wet environments (like agriculture), while high-friction 2RS seals may not suit very high-speed applications, requiring careful ZZ vs 2RS evaluation.
Unstable Supplier Quality & Missing Support
Inconsistent grinding, poor material control, or lack of engineering support (drawings, load review) from traders causes batch-to-batch variation and mass purchase risks for OEMs.
Why Choose Haron Bearing for 6300 Series Bearings?
Stable Manufacturing Capacity
With 100 advanced production lines and a mature production system, Haron Bearing supports stable OEM and batch supply for global industrial customers without unpredictable delays.
Material & Heat Treatment Control
We use GCr15 / 52100 chrome steel and precisely controlled heat treatment processes to support high hardness, fatigue resistance, and dimensional stability under load.
Precision Grinding & Low Noise Control
Advanced raceway grinding, along with strict roundness, vibration, and noise inspection, helps improve smooth operation specifically in electric motors and rotating equipment.
Flexible Sealing & Grease Options
Open, ZZ, 2RS, C3 clearance, high-temperature grease, and special lubrication fills can be selected and customized according to your specific working condition.
OEM / ODM Support
We support custom packaging, marking, private label, drawing-based production, and non-standard project requirements for brands and distributors.
Application-Based Selection Support
Our engineering team helps buyers accurately select bearing model, clearance, sealing, material, and grease based on load, speed, temperature, and environment.
How to Choose the Right 6300 Series Bearing
Confirm Bore Size
Start with the shaft diameter and choose the correct model, such as 6305 for 25 mm bore or 6310 for 50 mm bore.
Check Load & Space
Confirm radial load, axial load, available housing space, and expected service life to ensure 6300 series fits.
Choose Closure
Use Open for clean lubricated systems, ZZ for low-friction dust protection, and 2RS for stronger contamination resistance.
Clearance & Lube
Choose CN or C3 according to fit, speed, and temperature. Confirm grease type for standard or special use.
Confirm Quality
Confirm tolerance, inspection report, packaging, marking, and shipment requirements before mass production.
| Working Condition | Recommended Option |
|---|---|
| Clean, externally lubricated | Open |
| Dusty but high-speed requirement | ZZ / 2Z |
| Dust or light moisture exposure | 2RS |
| High temperature or tight press fit | C3 clearance |
| Electric motor application | Low noise grease + vibration inspection |
| OEM batch order | Custom packaging + inspection report |
Where 6300 Series Bearings Are Commonly Used
For stable running & low noise.
Pumps
For radial load support.
Gearboxes & Reducers
For higher load capacity.
Conveyors
For industrial handling.
Agricultural Machinery
For dusty environments (2RS).
Industrial Fans
For smooth rotation.
MRO & Repair
For standard replacement.
OEM Equipment
For batch stable supply.
Quality Inspection for Every Batch
For B2B and OEM orders, Haron Bearing can provide comprehensive inspection support according to project requirements, including dimension checks, vibration/noise control, appearance inspection, and packaging confirmation.
OEM Packaging and 4–8 Weeks Delivery
Haron Bearing supports neutral packaging, Haron brand packaging, customer private label packaging, and robust export carton / pallet packaging for safe transit. Standard delivery is 4–8 weeks depending on the specific model, batch quantity, and customization requirements.
Trusted by Global Industrial Buyers
Haron Bearing serves customers across Europe, the Middle East, the Americas, and other global markets. Our manufacturing experience, production capacity, and application-based technical support help buyers reduce sourcing risk and build a more stable bearing supply chain.
2000
Factory Established
400+
Skilled Employees
100
Production Lines
Global
OEM / ODM Projects
