6304LLB Single Row Deep Groove Ball Bearing Double Sides LLB Non-Contact Nitrile Rubber Seal 20x52x15mm High Speed Motor Equipment
The 6304LLB single row deep groove ball bearing adopts double-sided LLB non-contact nitrile rubber labyrinth seals, standard dimension 20×52×15mm. LLB non-contact seal creates labyrinth clearance without touching inner ring raceway, combining high dust resistance and ultra-low rotation torque, supports radial load and bidirectional slight axial load. Pre-filled long-life grease inside, suitable for high-speed motors, conveyors, agricultural machinery and general industrial rotating assemblies requiring quiet low-friction operation.
???? Get a quote within 24 hours for your project| Parameter | Value |
|---|---|
| Model | 6304LLB |
| Inner Diameter (d) | 20mm |
| Outer Diameter (D) | 52mm |
| Width (B) | 15mm |
| Structure | 6300 series heavy-duty single row deep groove ball bearing |
| Seal Type | Double sides LLB non-contact nitrile rubber labyrinth seal |
| Cage | Stamped steel cage |
| Material | GCr15 high carbon chromium bearing steel |
| Basic Dynamic Load Cr | 15900N |
| Basic Static Load Cor | 7900N |
| Grease Limiting Speed | 14000rpm |
| Working Temp | -25℃ ~ 120℃ |
| Clearance | Standard C0, C3 enlarged clearance customizable |
| Net Weight | Approx 0.144kg |
- LLB non-contact labyrinth rubber seal: no friction contact with inner ring, far higher limit speed than contact LLU/2RS seals
- Double-layer labyrinth structure blocks fine dust and particles, effectively lock internal lubriing grease
- Large ball layout of 6300 series delivers stronger radial load capacity than 62/60 series same bore bearings
- Superfinished raceway and steel balls ensure ultra-low noise, smooth stable high-speed rotation
- Nitrile rubber seal maintains stable elasticity under wide temperature range, long service life
- Multiple optional variants: open 6304, metal shield 6304ZZ, contact sealed 6304LLU/6304-2RS, C3 clearance
- Stainless steel anti-rust version can be customized for damp and light corrosive working environments
This LLB non-contact sealed deep groove bearing is widely applied in:
- High-speed electric motors, fan rotors and generator support assemblies
- Agricultural harvesters, garden power tools and farm vehicle transmission parts
- Conveyor rollers, packaging machinery and light construction rotary equipment
- General textile machinery, small water pumps and household power tool spindles
- 25+ years experience in LLB non-contact sealed deep groove ball bearing manufacturing
- Exported to 50+ countries worldwide
- Rich OEM bulk order experience for 6300 series LLB low torque high-speed bearings
- Strict seal labyrinth tightness, rotation torque and high-speed durability inspection before shipment
- Fast professional technical reply within 24 hours
- Stable mass supply for long-term motor and agricultural machinery factory cooperation
- GCr15 bearing steel raw material incoming hardness inspection
- Ultra-precision grinding for inner & outer raceway and large steel balls
- Standard quenching & tempering heat treatment for uniform surface hardness
- LLB seal labyrinth dust resistance & low torque test, clearance grouping and full dimensional recheck
- Anti-rust oil treatment and carton bulk packaging before delivery
Looking for double LLB non-contact low torque sealed heavy-duty 6304 deep groove ball bearing supplier?
- Fast factory quotation within 24h
- Professional motor & agricultural machinery bearing technical parameter support
- Custom open type / metal shield / contact seal & C3 clearance solution suggestions
- Competitive bulk wholesale factory price
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- Q1: What is the difference between LLB non-contact seal and LLU/2RS contact seal?
LLB seal does not touch inner ring, lower friction and higher limit speed; LLU/2RS contact seal has better waterproof splash performance but lower max speed.
- Q2: What is the grease limiting speed of 6304LLB?
Grease lubriion limiting speed reaches 14000 rpm for continuous stable high-speed running.
- Q3: What variants of 6304 bearing can you supply?
Open 6304, dust-proof metal shield 6304ZZ, low-torque non-contact 6304LLB, splash-proof contact sealed 6304LLU/6304-2RS and C3 clearance customized bearing.
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