KGI 6307 2RS Deep Groove Ball Bearing
The KGI 6307 2RS single-row deep groove ball bearing is a critical component in machinery and power transmission systems. With a 35mm bore diameter, it belongs to the 63 series (Medium Duty). Compared to lighter 6007 and 6207 series, this bearing features larger balls and thicker rings, resulting in significantly higher dynamic and static load-carrying capacity and superior resistance to mechanical shock and vibration.
10020013525
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Product Detail
Deep Groove Ball Bearing KGI 6307 2RS Double-Sided Rubber Contact Seals | 35mm Bore | Superior Heavy-Duty Radial Load Capacity
A robust industrial-grade bearing from the 6300 series, designed for 35mm shafts in heavy electric motors, pressurized pumps, gearboxes, and industrial machinery.
Introduction to KGI 6307 2RS
The KGI 6307 2RS single-row deep groove ball bearing is a critical component in machinery and power transmission systems. With a 35mm bore diameter, it belongs to the 63 series (Medium Duty). Compared to lighter 6007 and 6207 series, this bearing features larger balls and thicker rings, resulting in significantly higher dynamic and static load-carrying capacity and superior resistance to mechanical shock and vibration.
The 2RS suffix indicates that the bearing is equipped with two contact seals made of steel-reinforced synthetic rubber (NBR). These seals sit tightly against the inner ring, effectively preventing the ingress of fine dust, metal shavings, moisture, and liquid droplets into the raceways.
This component is pre-filled with an optimal volume of high-quality industrial grease at the factory, making it a Maintenance-Free bearing; a feature that significantly reduces service costs and downtime in production lines.
Technical Code Breakdown (6307 2RS)
6: Identification code for single-row deep groove ball bearings.
3: Series identifier for Medium Duty, featuring stronger balls and thicker cross-sections compared to the 60 and 62 series.
07: Bore Diameter code: 07 × 5 = 35 mm.
2RS: Indicates two rubber contact seals (NBR) on both sides to completely block contaminants and retain grease.
Dimensions & Technical Specifications
| Bore (d) | Outer Diameter (D) | Width (B) | Seal Type | Lubrication | Environment |
|---|---|---|---|---|---|
| 35 mm | 80 mm | 21 mm | 2RS (Rubber Contact) | Factory Standard Industrial Grease | Dusty & Humid |
Key Advantages
2RS Impermeable Sealing
Rubber contact seals provide a secure barrier against mud, water, filings, and airborne contaminants.
High Dynamic Load Capacity
The 80mm outer ring and larger rolling elements ensure high tolerance against heavy radial and coupled loads.
Maintenance-Free
Precise factory-fill prevents improper lubrication risks and extends the effective service life.
Hardened Chrome Bearing Steel (GCr15)
Controlled surface hardening in protective atmospheres enhances resistance against wear and fatigue.
Dual Axial Load Support
The deep raceway geometry allows it to withstand bidirectional axial loads in addition to radial forces.
Smooth Operation & Low Vibration
High-precision surface finish and cage tolerances ensure quiet operation and reduced thermal energy loss.
Common Industrial Applications
The KGI 6307 2RS is widely utilized on 35mm shafts in the following sectors:
- Medium to High Power Electric Motors: Shaft bearings for three-phase industrial motors in harsh conditions.
- Industrial Centrifugal Pumps: Shafts exposed to moisture, vapor, or corrosive materials.
- Industrial Gearboxes: Input or intermediate 35mm shafts subject to gear stress.
- Heavy Agriculture & Construction Machinery: Tractors, harvesters, concrete mixers, and equipment prone to heavy dust.
- Heavy Convey4px solid #f0c040;padding-left:12px;margin:35px 0 15px 0;"> Common Industrial Applications
The KGI 6307 2RS is widely utilized on 35mm shafts in the following sectors:
- Medium to High Power Electric Motors: Shaft bearings for three-phase industrial motors in harsh conditions.
- Industrial Centrifugal Pumps: Shafts exposed to moisture, vapor, or corrosive materials.
- Industrial Gearboxes: Input or intermediate 35mm shafts subject to gear stress.
- Heavy Agriculture & Construction Machinery: Tractors, harvesters, concrete mixers, and equipment prone to heavy dust.
- Heavy Conveyors: Pulleys and rollers in mining and cement manufacturing processing lines.
Technical Selection & Buying Guide
1) Force on the Correct Ring
When installing on a 35mm shaft, apply press-fit force exclusively to the inner ring to prevent damage or force transmission through the rolling elements.
2) No Direct Flame
Never use direct flame torches to heat the bearing; this destroys the rubber seals and burns the internal grease. Always use an induction heater.
3) Seal Protection
Avoid contact with sharp tools on the rubber seals; any cuts will lead to grease leakage and rapid bearing wear.
4) Alignment
Ensure precise alignment of the shaft and housing; excessive misalignment causes uneven loading on the raceway and premature fatigue.
Troubleshooting & Symptoms of Failure
- Unusual Whining or Grinding Noise: Often indicates particle ingress due to seal damage or raceway indentations caused by improper installation impact.
- Abnormal Temperature Rise: May result from an excessively tight fit (losing internal clearance) or rotational speeds exceeding the seal's limit.
- Shaft Vibration: Check for rotor imbalance, shaft deflection, or incorrect housing tolerances.
Frequently Asked Questions (FAQ)
1) What are the exact dimensions of the 6307 bearing?
Standard dimensions are: 35mm Bore, 80mm Outer Diameter, and 21mm Width.
2) Does the KGI 6307 2RS require re-greasing upon installation?
Frequently Asked Questions (FAQ)
1) What are the exact dimensions of the 6307 bearing?
Standard dimensions are: 35mm Bore, 80mm Outer Diameter, and 21mm Width.
2) Does the KGI 6307 2RS require re-greasing upon installation?
No; this bearing is factory-packed with premium grease and sealed, requiring no re-lubrication during installation or service life.
3) What is the difference between 6207 and 6307?
Both fit 35mm shafts, but the 6307 has a superior sealing capability of 2RS covers, making it an ideal, maintenance-free choice for all 35mm industrial shafts operating in dusty or humid environments.
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